""" Temporal algebra parser class (C) 2014 by the GRASS Development Team This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details. :authors: Thomas Leppelt and Soeren Gebbert .. code-block:: python >>> import grass.temporal as tgis >>> tgis.init(True) >>> p = tgis.TemporalAlgebraLexer() >>> p.build() >>> p.debug = True >>> expression = "C = A : B" >>> p.test(expression) C = A : B LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'A',1,4) LexToken(T_SELECT,':',1,6) LexToken(NAME,'B',1,8) >>> expression = "C = test1 !: test2" >>> p.test(expression) C = test1 !: test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_NOT_SELECT,'!:',1,10) LexToken(NAME,'test2',1,13) >>> expression = "C = test1 {equal,:} test2" >>> p.test(expression) C = test1 {equal,:} test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_SELECT_OPERATOR,'{equal,:}',1,10) LexToken(NAME,'test2',1,20) >>> expression = "C = test1 {equal,!:} test2" >>> p.test(expression) C = test1 {equal,!:} test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_SELECT_OPERATOR,'{equal,!:}',1,10) LexToken(NAME,'test2',1,21) >>> expression = "C = test1 # test2" >>> p.test(expression) C = test1 # test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(HASH,'#',1,10) LexToken(NAME,'test2',1,12) >>> expression = "C = test1 {#} test2" >>> p.test(expression) C = test1 {#} test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_HASH_OPERATOR,'{#}',1,10) LexToken(NAME,'test2',1,14) >>> expression = "C = test1 {equal,#} test2" >>> p.test(expression) C = test1 {equal,#} test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_HASH_OPERATOR,'{equal,#}',1,10) LexToken(NAME,'test2',1,20) >>> expression = "C = test1 {equal|during,#} test2" >>> p.test(expression) C = test1 {equal|during,#} test2 LexToken(NAME,'C',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_HASH_OPERATOR,'{equal|during,#}',1,10) LexToken(NAME,'test2',1,27) >>> expression = "E = test1 : test2 !: test1" >>> p.test(expression) E = test1 : test2 !: test1 LexToken(NAME,'E',1,0) LexToken(EQUALS,'=',1,2) LexToken(NAME,'test1',1,4) LexToken(T_SELECT,':',1,10) LexToken(NAME,'test2',1,12) LexToken(T_NOT_SELECT,'!:',1,18) LexToken(NAME,'test1',1,21) >>> expression = 'D = buff_t(test1,"10 months")' >>> p.test(expression) D = buff_t(test1,"10 months") LexToken(NAME,'D',1,0) LexToken(EQUALS,'=',1,2) LexToken(BUFF_T,'buff_t',1,4) LexToken(LPAREN,'(',1,10) LexToken(NAME,'test1',1,11) LexToken(COMMA,',',1,16) LexToken(QUOTE,'"',1,17) LexToken(INT,10,1,18) LexToken(NAME,'months',1,21) LexToken(QUOTE,'"',1,27) LexToken(RPAREN,')',1,28) >>> expression = 'H = tsnap(test1)' >>> p.test(expression) H = tsnap(test1) LexToken(NAME,'H',1,0) LexToken(EQUALS,'=',1,2) LexToken(TSNAP,'tsnap',1,4) LexToken(LPAREN,'(',1,9) LexToken(NAME,'test1',1,10) LexToken(RPAREN,')',1,15) >>> expression = 'H = tsnap(test2 {during,:} buff_t(test1, "1 days"))' >>> p.test(expression) H = tsnap(test2 {during,:} buff_t(test1, "1 days")) LexToken(NAME,'H',1,0) LexToken(EQUALS,'=',1,2) LexToken(TSNAP,'tsnap',1,4) LexToken(LPAREN,'(',1,9) LexToken(NAME,'test2',1,10) LexToken(T_SELECT_OPERATOR,'{during,:}',1,16) LexToken(BUFF_T,'buff_t',1,27) LexToken(LPAREN,'(',1,33) LexToken(NAME,'test1',1,34) LexToken(COMMA,',',1,39) LexToken(QUOTE,'"',1,41) LexToken(INT,1,1,42) LexToken(NAME,'days',1,44) LexToken(QUOTE,'"',1,48) LexToken(RPAREN,')',1,49) LexToken(RPAREN,')',1,50) >>> expression = 'H = tshift(test2 {during,:} buff_t(test1, "1 days"), "1 months")' >>> p.test(expression) H = tshift(test2 {during,:} buff_t(test1, "1 days"), "1 months") LexToken(NAME,'H',1,0) LexToken(EQUALS,'=',1,2) LexToken(TSHIFT,'tshift',1,4) LexToken(LPAREN,'(',1,10) LexToken(NAME,'test2',1,11) LexToken(T_SELECT_OPERATOR,'{during,:}',1,17) LexToken(BUFF_T,'buff_t',1,28) LexToken(LPAREN,'(',1,34) LexToken(NAME,'test1',1,35) LexToken(COMMA,',',1,40) LexToken(QUOTE,'"',1,42) LexToken(INT,1,1,43) LexToken(NAME,'days',1,45) LexToken(QUOTE,'"',1,49) LexToken(RPAREN,')',1,50) LexToken(COMMA,',',1,51) LexToken(QUOTE,'"',1,53) LexToken(INT,1,1,54) LexToken(NAME,'months',1,56) LexToken(QUOTE,'"',1,62) LexToken(RPAREN,')',1,63) >>> expression = 'H = tshift(A , 10)' >>> p.test(expression) H = tshift(A , 10) LexToken(NAME,'H',1,0) LexToken(EQUALS,'=',1,2) LexToken(TSHIFT,'tshift',1,4) LexToken(LPAREN,'(',1,10) LexToken(NAME,'A',1,11) LexToken(COMMA,',',1,13) LexToken(INT,10,1,15) LexToken(RPAREN,')',1,17) >>> expression = 'H = if(td(A) > 10, A)' >>> p.test(expression) H = if(td(A) > 10, A) LexToken(NAME,'H',1,0) LexToken(EQUALS,'=',1,2) LexToken(IF,'if',1,4) LexToken(LPAREN,'(',1,6) LexToken(TD,'td',1,7) LexToken(LPAREN,'(',1,9) LexToken(NAME,'A',1,10) LexToken(RPAREN,')',1,11) LexToken(GREATER,'>',1,13) LexToken(INT,10,1,15) LexToken(COMMA,',',1,17) LexToken(NAME,'A',1,19) LexToken(RPAREN,')',1,20) >>> expression = 'H = if(td(A) > 10, A, B)' >>> p.test(expression) H = if(td(A) > 10, A, B) LexToken(NAME,'H',1,0) LexToken(EQUALS,'=',1,2) LexToken(IF,'if',1,4) LexToken(LPAREN,'(',1,6) LexToken(TD,'td',1,7) LexToken(LPAREN,'(',1,9) LexToken(NAME,'A',1,10) LexToken(RPAREN,')',1,11) LexToken(GREATER,'>',1,13) LexToken(INT,10,1,15) LexToken(COMMA,',',1,17) LexToken(NAME,'A',1,19) LexToken(COMMA,',',1,20) LexToken(NAME,'B',1,22) LexToken(RPAREN,')',1,23) >>> expression = 'I = if(equals,td(A) > 10 {equals,||} td(B) < 10, A)' >>> p.test(expression) I = if(equals,td(A) > 10 {equals,||} td(B) < 10, A) LexToken(NAME,'I',1,0) LexToken(EQUALS,'=',1,2) LexToken(IF,'if',1,4) LexToken(LPAREN,'(',1,6) LexToken(NAME,'equals',1,7) LexToken(COMMA,',',1,13) LexToken(TD,'td',1,14) LexToken(LPAREN,'(',1,16) LexToken(NAME,'A',1,17) LexToken(RPAREN,')',1,18) LexToken(GREATER,'>',1,20) LexToken(INT,10,1,22) LexToken(T_COMP_OPERATOR,'{equals,||}',1,25) LexToken(TD,'td',1,37) LexToken(LPAREN,'(',1,39) LexToken(NAME,'B',1,40) LexToken(RPAREN,')',1,41) LexToken(LOWER,'<',1,43) LexToken(INT,10,1,45) LexToken(COMMA,',',1,47) LexToken(NAME,'A',1,49) LexToken(RPAREN,')',1,50) >>> expression = 'I = if(equals,td(A) > 10 || start_day() < 10, A)' >>> p.test(expression) I = if(equals,td(A) > 10 || start_day() < 10, A) LexToken(NAME,'I',1,0) LexToken(EQUALS,'=',1,2) LexToken(IF,'if',1,4) LexToken(LPAREN,'(',1,6) LexToken(NAME,'equals',1,7) LexToken(COMMA,',',1,13) LexToken(TD,'td',1,14) LexToken(LPAREN,'(',1,16) LexToken(NAME,'A',1,17) LexToken(RPAREN,')',1,18) LexToken(GREATER,'>',1,20) LexToken(INT,10,1,22) LexToken(OR,'|',1,25) LexToken(OR,'|',1,26) LexToken(START_DAY,'start_day',1,28) LexToken(LPAREN,'(',1,37) LexToken(RPAREN,')',1,38) LexToken(LOWER,'<',1,40) LexToken(INT,10,1,42) LexToken(COMMA,',',1,44) LexToken(NAME,'A',1,46) LexToken(RPAREN,')',1,47) >>> expression = 'E = if({equals},td(A) >= 4 {contain,&&} td(B) == 2, C : D)' >>> p.test(expression) E = if({equals},td(A) >= 4 {contain,&&} td(B) == 2, C : D) LexToken(NAME,'E',1,0) LexToken(EQUALS,'=',1,2) LexToken(IF,'if',1,4) LexToken(LPAREN,'(',1,6) LexToken(T_REL_OPERATOR,'{equals}',1,7) LexToken(COMMA,',',1,15) LexToken(TD,'td',1,16) LexToken(LPAREN,'(',1,18) LexToken(NAME,'A',1,19) LexToken(RPAREN,')',1,20) LexToken(GREATER_EQUALS,'>=',1,22) LexToken(INT,4,1,25) LexToken(T_COMP_OPERATOR,'{contain,&&}',1,27) LexToken(TD,'td',1,40) LexToken(LPAREN,'(',1,42) LexToken(NAME,'B',1,43) LexToken(RPAREN,')',1,44) LexToken(CEQUALS,'==',1,46) LexToken(INT,2,1,49) LexToken(COMMA,',',1,50) LexToken(NAME,'C',1,52) LexToken(T_SELECT,':',1,54) LexToken(NAME,'D',1,56) LexToken(RPAREN,')',1,57) >>> expression = 'F = if({equals},A {equal,#}, B, C : D)' >>> p.test(expression) F = if({equals},A {equal,#}, B, C : D) LexToken(NAME,'F',1,0) LexToken(EQUALS,'=',1,2) LexToken(IF,'if',1,4) LexToken(LPAREN,'(',1,6) LexToken(T_REL_OPERATOR,'{equals}',1,7) LexToken(COMMA,',',1,15) LexToken(NAME,'A',1,16) LexToken(T_HASH_OPERATOR,'{equal,#}',1,18) LexToken(COMMA,',',1,27) LexToken(NAME,'B',1,29) LexToken(COMMA,',',1,30) LexToken(NAME,'C',1,32) LexToken(T_SELECT,':',1,34) LexToken(NAME,'D',1,36) LexToken(RPAREN,')',1,37) >>> p = tgis.TemporalAlgebraParser() >>> p.run = False >>> p.debug = True >>> expression = "D = A : (B !: C)" >>> p.parse(expression) B* = B !: C A* = A : B* D = A* >>> expression = "D = A {!:} B {during,:} C" >>> print(expression) D = A {!:} B {during,:} C >>> p.parse(expression) A* = A {!:} B A** = A* {during,:} C D = A** >>> expression = "D = A {:} B {during,!:} C" >>> print(expression) D = A {:} B {during,!:} C >>> p.parse(expression) A* = A {:} B A** = A* {during,!:} C D = A** >>> expression = "D = A {:} (B {during,!:} (C : E))" >>> print(expression) D = A {:} (B {during,!:} (C : E)) >>> p.parse(expression) C* = C : E B* = B {during,!:} C* A* = A {:} B* D = A* >>> p.run = False >>> p.debug = False >>> expression = "C = test1 : test2" >>> print(expression) C = test1 : test2 >>> p.parse(expression, 'stvds') >>> expression = 'D = buff_t(test1,"10 months")' >>> print(expression) D = buff_t(test1,"10 months") >>> p.parse(expression, 'stvds') >>> expression = 'E = test2 {during,:} buff_t(test1,"1 days")' >>> print(expression) E = test2 {during,:} buff_t(test1,"1 days") >>> p.parse(expression, 'stvds') >>> expression = 'F = test2 {equal,:} buff_t(test1,"1 days")' >>> print(expression) F = test2 {equal,:} buff_t(test1,"1 days") >>> p.parse(expression, 'stvds') >>> p.debug = True >>> expression = 'H = tsnap(test2 {during,:} buff_t(test1, "1 days"))' >>> p.parse(expression, 'stvds') test1* = buff_t( test1 , " 1 days " ) test2* = test2 {during,:} test1* test2** = tsnap( test2* ) H = test2** >>> expression = 'H = tshift(test2 {during,:} test1, "1 days")' >>> p.parse(expression, 'stvds') test2* = test2 {during,:} test1 test2** = tshift( test2* , " 1 days " ) H = test2** >>> expression = 'H = tshift(H, 3)' >>> p.parse(expression, 'stvds') H* = tshift( H , 3 ) H = H* >>> expression = 'C = if(td(A) == 2, A)' >>> p.parse(expression, 'stvds') td(A) td(A) == 2 A* = if condition True then A C = A* >>> expression = 'C = if(td(A) == 5, A, B)' >>> p.parse(expression, 'stvds') td(A) td(A) == 5 A* = if condition True then A else B C = A* >>> expression = 'C = if(td(A) == 5 || start_date() > "2010-01-01", A, B)' >>> p.parse(expression, 'stvds') td(A) td(A) == 5 start_date > "2010-01-01" True || True A* = if condition True then A else B C = A* """ try: import ply.lex as lex import ply.yacc as yacc except: pass import os from space_time_datasets import * from factory import * from open_stds import * from grass.exceptions import FatalError ############################################################################## class TemporalAlgebraLexer(object): """Lexical analyzer for the GRASS GIS temporal algebra""" # Functions that defines an if condition, temporal buffering and snapping conditional_functions = { 'if': 'IF', 'buff_t': 'BUFF_T', 'tsnap': 'TSNAP', 'tshift': 'TSHIFT', } # Variables with date and time strings datetime_functions = { 'start_time': 'START_TIME', # start time as HH::MM:SS 'start_date': 'START_DATE', # start date as yyyy-mm-DD 'start_datetime': 'START_DATETIME', # start datetime as yyyy-mm-DD HH:MM:SS 'end_time': 'END_TIME', # end time as HH:MM:SS 'end_date': 'END_DATE', # end date as yyyy-mm-DD 'end_datetime': 'END_DATETIME', # end datetime as yyyy-mm-DD HH:MM:SS } # Time functions time_functions = { 'td' : 'TD', # The size of the current # sample time interval in days and # fraction of days for absolute time, # and in relative units in case of relative time. #'start_td' : 'START_TD', # The time difference between the start # time of the sample space time raster # dataset and the start time of the # current sample interval or instance. # The time is measured in days and # fraction of days for absolute time, # and in relative units in case of relative time. #'end_td' : 'END_TD', # The time difference between the # start time of the sample # space time raster dataset and the # end time of the current sample interval. # The time is measured in days and # fraction of days for absolute time, # and in relative units in case of relative time. # The end_time() will be represented by null() in case of a time instance. 'start_doy' : 'START_DOY', # Day of year (doy) from the start time [1 - 366] 'start_dow' : 'START_DOW', # Day of week (dow) from the start time [1 - 7], the start of the week is Monday == 1 'start_year' : 'START_YEAR', # The year of the start time [0 - 9999] 'start_month' : 'START_MONTH', # The month of the start time [1 - 12] 'start_week' : 'START_WEEK', # Week of year of the start time [1 - 54] 'start_day' : 'START_DAY', # Day of month from the start time [1 - 31] 'start_hour' : 'START_HOUR', # The hour of the start time [0 - 23] 'start_minute': 'START_MINUTE', # The minute of the start time [0 - 59] 'start_second': 'START_SECOND', # The second of the start time [0 - 59] 'end_doy' : 'END_DOY', # Day of year (doy) from the end time [1 - 366] 'end_dow' : 'END_DOW', # Day of week (dow) from the end time [1 - 7], the start of the week is Monday == 1 'end_year' : 'END_YEAR', # The year of the end time [0 - 9999] 'end_month' : 'END_MONTH', # The month of the end time [1 - 12] 'end_week' : 'END_WEEK', # Week of year of the end time [1 - 54] 'end_day' : 'END_DAY', # Day of month from the start time [1 - 31] 'end_hour' : 'END_HOUR', # The hour of the end time [0 - 23] 'end_minute' : 'END_MINUTE', # The minute of the end time [0 - 59] 'end_second' : 'END_SECOND', # The second of the end time [0 - 59] } # This is the list of token names. tokens = ( 'DATETIME', 'TIME', 'DATE', 'INT', 'FLOAT', 'LPAREN', 'RPAREN', 'COMMA', 'CEQUALS', 'EQUALS', 'UNEQUALS', 'LOWER', 'LOWER_EQUALS', 'GREATER', 'GREATER_EQUALS', 'HASH', 'OR', 'AND', 'T_SELECT_OPERATOR', 'T_HASH_OPERATOR', 'T_COMP_OPERATOR', 'T_REL_OPERATOR', 'T_SELECT', 'T_NOT_SELECT', 'NAME', 'QUOTE', ) # Build the token list tokens = tokens + tuple(datetime_functions.values()) \ + tuple(time_functions.values()) \ + tuple(conditional_functions.values()) # Regular expression rules for simple tokens t_T_SELECT_OPERATOR = r'\{([a-zA-Z\| ]+[,])?([\|&+=]?[!]?[:])\}' t_T_HASH_OPERATOR = r'\{([a-zA-Z\| ]+[,])?[#]\}' t_T_COMP_OPERATOR = r'\{([a-zA-Z\| ]+[,])?(\|\||&&)\}' t_T_REL_OPERATOR = r'\{([a-zA-Z\| ])+\}' t_T_SELECT = r':' t_T_NOT_SELECT = r'!:' t_LPAREN = r'\(' t_RPAREN = r'\)' t_COMMA = r',' t_CEQUALS = r'==' t_EQUALS = r'=' t_UNEQUALS = r'!=' t_LOWER = r'<' t_LOWER_EQUALS = r'<=' t_GREATER = r'>' t_GREATER_EQUALS = r'>=' t_HASH = r'\#' t_OR = r'[\|]' t_AND = r'[&]' t_QUOTE = r'[\"\']' # These are the things that should be ignored. t_ignore = ' \t' # Read time string and convert it into a date object def t_DATETIME(self, t): r'"\d\d\d\d-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])[ T](0[0-9]|1(0-9)|2[0-4]):(0[0-9]|[1-5][0-9]|60):(0[0-9]|[1-5][0-9]|60)"' # t.value = int(t.value) return t # Read date string and convert it into a date object def t_DATE(self, t): r'"\d\d\d\d-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])"' # t.value = int(t.value) return t # Read time string and convert it into a date object def t_TIME(self, t): r'"(0[0-9]|1[0-9]|2[0-4]):(0[0-9]|[1-5][0-9]|60):(0[0-9]|[1-5][0-9]|60)"' # t.value = int(t.value) return t # Read in a float. This rule has to be done before the int rule. def t_FLOAT(self, t): r'-?\d+\.\d*(e-?\d+)?' t.value = float(t.value) return t # Read in an int. def t_INT(self, t): r'-?\d+' t.value = int(t.value) return t # Read in a list of maps. def t_LIST(self, t): r'[\[][.]*[\]]' t.value = list(t.value) return t # Ignore comments. # def t_comment(self, t): # r'^[#][^\n]*' # pass # Track line numbers. def t_newline(self, t): r'\n+' t.lineno += len(t.value) def t_NAME(self, t): r'[a-zA-Z_][a-zA-Z_0-9]*' self.temporal_symbol(t) return t # Parse symbols def temporal_symbol(self, t): # Check for reserved words if t.value in TemporalAlgebraLexer.time_functions.keys(): t.type = TemporalAlgebraLexer.time_functions.get(t.value) elif t.value in TemporalAlgebraLexer.datetime_functions.keys(): t.type = TemporalAlgebraLexer.datetime_functions.get(t.value) elif t.value in TemporalAlgebraLexer.conditional_functions.keys(): t.type = TemporalAlgebraLexer.conditional_functions.get(t.value) else: t.type = 'NAME' return t # Handle errors. def t_error(self, t): raise SyntaxError("syntax error on line %d near '%s'" % (t.lineno, t.value)) # Build the lexer def build(self, **kwargs): self.lexer = lex.lex(module=self, optimize=False, debug=False, **kwargs) # Just for testing def test(self, data): self.name_list = {} print(data) self.lexer.input(data) while True: tok = self.lexer.token() if not tok: break print tok ############################################################################### class GlobalTemporalVar(object): """ This class handles global temporal variable conditional expressions, like start_doy() == 3. The three parts of the statement are stored separately in tfunc (START_DOY), compop (==) and value (3). But also boolean values, time differences and relation operators for comparison in if-statements can be stored in this class. """ def __init__(self): self.tfunc = None self.compop = None self.value = None self.boolean = None self.relationop = None self.topology = [] self.td = None def get_type(self): if self.tfunc is not None and self.compop is not None and \ self.value is not None: return("global") elif self.boolean is not None: return("boolean") elif self.relationop is not None and self.topology is not []: return("operator") elif self.td is not None: return("timediff") def get_type_value(self): typename = self.get_type() valuelist = [] if typename == "global": valuelist = [self.tfunc, self.compop, self.value] elif typename == "operator": valuelist.append(self.topology) valuelist.append(self.relationop) elif typename == "boolean": valuelist = self.boolean elif typename == "timediff": valuelist.append(self.td) return(valuelist) def __str__(self): return str(self.tfunc) + str(self.compop) + str(self.value) ############################################################################### class TemporalAlgebraParser(object): """The temporal algebra class""" # Get the tokens from the lexer class tokens = TemporalAlgebraLexer.tokens # Setting equal precedence level for select and hash operations. precedence = ( ('left', 'T_SELECT_OPERATOR', 'T_SELECT', 'T_NOT_SELECT'), # 1 ('left', 'AND', 'OR', 'T_COMP_OPERATOR'), # 2 ) def __init__(self, pid=None, run=True, debug=False, spatial=False, null=False): self.run = run self.debug = debug self.pid = pid # Intermediate vector map names self.names = {} # Count map names self.spatial = spatial self.null = null self.mapset = get_current_mapset() self.temporaltype = None self.msgr = get_tgis_message_interface() self.dbif = SQLDatabaseInterfaceConnection() self.dbif.connect() def __del__(self): if self.dbif.connected: self.dbif.close() def parse(self, expression, stdstype='strds', basename=None, overwrite=False): self.lexer = TemporalAlgebraLexer() self.lexer.build() self.parser = yacc.yacc(module=self, debug=self.debug) self.overwrite = overwrite self.count = 0 self.stdstype = stdstype self.basename = basename self.expression = expression self.parser.parse(expression) def generate_map_name(self): """Generate an unique intermediate vector map name and register it in the objects map list for later removement. The vector map names are unique between processes. Do not use the same object for map name generation in multiple threads. """ self.count += 1 if self.pid is not None: pid = self.pid else: pid = os.getpid() name = "tmp_map_name_%i_%i" % (pid, self.count) self.names[name] = name return name def generate_new_map(self, base_map, bool_op='and', copy=True): """Generate a new map using the spatio-temporal extent of the base map :param base_map This map is used to create the new map """ # Generate an intermediate name for the result map list. name = self.generate_map_name() # Check for mapset in given stds input. mapname = name + "@" + self.mapset # Create new map based on the related map list. map_new = base_map.get_new_instance(mapname) # Set initial map extend of new vector map. self.overlay_map_extent(map_new, base_map, bool_op=bool_op, copy=copy) return map_new def overlay_map_extent(self, mapA, mapB, bool_op=None, temp_op='=', copy=False): """Compute the spatio-temporal extent of two topological related maps :param mapA: The first map :param mapB: The second maps :param bool_op: The boolean operator specifying the spatial extent operation (intersection, union, disjoint union) :param temp_op: The temporal operator specifying the temporal extent operation (intersection, union, disjoint union) :param copy: Specifies if the temporal extent of mapB should be copied to mapA :return: 0 if there is no overlay """ returncode = 1 if copy: map_extent_temporal = mapB.get_temporal_extent() map_extent_spatial = mapB.get_spatial_extent() # Set initial map extend of new vector map. mapA.set_spatial_extent(map_extent_spatial) mapA.set_temporal_extent(map_extent_temporal) if "cmd_list" in dir(mapB): mapA.cmd_list = mapB.cmd_list else: # Calculate spatial extent for different overlay operations. if bool_op == 'and': overlay_ext = mapA.spatial_intersection(mapB) if overlay_ext is not None: mapA.set_spatial_extent(overlay_ext) else: returncode = 0 elif bool_op in ['or', 'xor']: overlay_ext = mapA.spatial_union(mapB) if overlay_ext is not None: mapA.set_spatial_extent(overlay_ext) else: returncode = 0 elif bool_op == 'disor': overlay_ext = mapA.spatial_disjoint_union(mapB) if overlay_ext is not None: mapA.set_spatial_extent(overlay_ext) else: returncode = 0 # Calculate temporal extent for different temporal operators. if temp_op == '&': temp_ext = mapA.temporal_intersection(mapB) if temp_ext is not None: mapA.set_temporal_extent(temp_ext) else: returncode = 0 elif temp_op == '|': temp_ext = mapA.temporal_union(mapB) if temp_ext is not None: mapA.set_temporal_extent(temp_ext) else: returncode = 0 elif temp_op == '+': temp_ext = mapA.temporal_disjoint_union(mapB) if temp_ext is not None: mapA.set_temporal_extent(temp_ext) else: returncode = 0 return(returncode) ######################### Temporal functions ############################## def check_stds(self, input, clear=False): """Check if input space time dataset exist in database and return its map list. :param input: Name of space time data set as string or list of maps. :param clear: Reset the stored conditional values to empty list. :return: List of maps. """ if not isinstance(input, list): # Check for mapset in given stds input. if input.find("@") >= 0: id_input = input else: id_input = input + "@" + self.mapset # Create empty spacetime dataset. stds = dataset_factory(self.stdstype, id_input) # Check for occurence of space time dataset. if stds.is_in_db(dbif=self.dbif) is False: raise FatalError(_("Space time %s dataset <%s> not found") % (stds.get_new_map_instance(None).get_type(), id_input)) else: # Select temporal dataset entry from database. stds.select(dbif=self.dbif) maplist = stds.get_registered_maps_as_objects(dbif=self.dbif) # Create map_value as empty list item. for map_i in maplist: if "map_value" not in dir(map_i): map_i.map_value = [] if "condition_value" not in dir(map_i): map_i.condition_value = [] # Set and check global temporal type variable and map. if map_i.is_time_absolute() and self.temporaltype is None: self.temporaltype = 'absolute' elif map_i.is_time_relative() and self.temporaltype is None: self.temporaltype = 'relative' elif map_i.is_time_absolute() and self.temporaltype == 'relative': self.msgr.fatal(_("Wrong temporal type of space time" " dataset <%s> <%s> time is required") % (id_input, self.temporaltype)) elif map_i.is_time_relative() and self.temporaltype == 'absolute': self.msgr.fatal(_("Wrong temporal type of space time" " dataset <%s> <%s> time is required") % (id_input, self.temporaltype)) else: maplist = input # Create map_value as empty list item. for map_i in maplist: if "map_value" not in dir(map_i): map_i.map_value = [] elif clear: map_i.map_value = [] if "condition_value" not in dir(map_i): map_i.condition_value = [] elif clear: map_i.condition_value = [] return(maplist) def get_temporal_topo_list(self, maplistA, maplistB=None, topolist=["EQUAL"], assign_val=False, count_map=False): """Build temporal topology for two space time data sets, copy map objects for given relation into map list. :param maplistA: List of maps. :param maplistB: List of maps. :param topolist: List of strings of temporal relations. :param assign_val: Boolean for assigning a boolean map value based on the map_values from the compared map list by topological relationships. :param count_map: Boolean if the number of topological related maps should be returned. :return: List of maps from maplistA that fulfil the topological relationships to maplistB specified in topolist. .. code-block:: python # Example with two lists of maps >>> import grass.temporal as tgis >>> tgis.init(True) >>> l = tgis.TemporalAlgebraParser() >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_relative_time(i, i + 1, "months") ... check = mapB.set_relative_time(i, i + 1, "months") ... mapsA.append(mapA) ... mapsB.append(mapB) >>> resultlist = l.get_temporal_topo_list(mapsA, mapsB, ['EQUAL']) >>> for map in resultlist: ... if map.get_equal(): ... relations = map.get_equal() ... print "Map %s has equal relation to map %s"%(map.get_name(), ... relations[0].get_name()) Map a0 has equal relation to map b0 Map a1 has equal relation to map b1 Map a2 has equal relation to map b2 Map a3 has equal relation to map b3 Map a4 has equal relation to map b4 Map a5 has equal relation to map b5 Map a6 has equal relation to map b6 Map a7 has equal relation to map b7 Map a8 has equal relation to map b8 Map a9 has equal relation to map b9 >>> resultlist = l.get_temporal_topo_list(mapsA, mapsB, ['DURING']) >>> print(resultlist) [] >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_relative_time(i, i + 1, "months") ... check = mapB.set_relative_time(i, i + 2, "months") ... mapsA.append(mapA) ... mapsB.append(mapB) >>> resultlist = l.get_temporal_topo_list(mapsA, mapsB, ['starts','during']) >>> for map in resultlist: ... if map.get_starts(): ... relations = map.get_starts() ... print "Map %s has start relation to map %s"%(map.get_name(), ... relations[0].get_name()) Map a0 has start relation to map b0 Map a1 has start relation to map b1 Map a2 has start relation to map b2 Map a3 has start relation to map b3 Map a4 has start relation to map b4 Map a5 has start relation to map b5 Map a6 has start relation to map b6 Map a7 has start relation to map b7 Map a8 has start relation to map b8 Map a9 has start relation to map b9 >>> for map in resultlist: ... if map.get_during(): ... relations = map.get_during() ... print "Map %s has during relation to map %s"%(map.get_name(), ... relations[0].get_name()) Map a0 has during relation to map b0 Map a1 has during relation to map b0 Map a2 has during relation to map b1 Map a3 has during relation to map b2 Map a4 has during relation to map b3 Map a5 has during relation to map b4 Map a6 has during relation to map b5 Map a7 has during relation to map b6 Map a8 has during relation to map b7 Map a9 has during relation to map b8 >>> # Create two list of maps with equal time stamps and map_value method. >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_relative_time(i, i + 1, "months") ... check = mapB.set_relative_time(i, i + 1, "months") ... mapB.map_value = True ... mapsA.append(mapA) ... mapsB.append(mapB) >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... mapA.map_value = True ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... mapB.map_value = False ... check = mapA.set_absolute_time(datetime(2000,1,i+1), ... datetime(2000,1,i + 2)) ... check = mapB.set_absolute_time(datetime(2000,1,i+6), ... datetime(2000,1,i + 7)) ... mapsA.append(mapA) ... mapsB.append(mapB) >>> resultlist = l.get_temporal_topo_list(mapsA, mapsB) >>> for map in resultlist: ... print(map.get_id()) a5@B a6@B a7@B a8@B a9@B >>> resultlist = l.get_temporal_topo_list(mapsA, mapsB, ['during']) >>> for map in resultlist: ... print(map.get_id()) """ topologylist = ["EQUAL", "FOLLOWS", "PRECEDES", "OVERLAPS", "OVERLAPPED", "DURING", "STARTS", "FINISHES", "CONTAINS", "STARTED", "FINISHED"] complementdict = {"EQUAL": "EQUAL", "FOLLOWS": "PRECEDES", "PRECEDES": "FOLLOWS", "OVERLAPS": "OVERLAPPED", "OVERLAPPED": "OVERLAPS", "DURING": "CONTAINS", "CONTAINS": "DURING", "STARTS": "STARTED", "STARTED": "STARTS", "FINISHES": "FINISHED", "FINISHED": "FINISHES"} resultdict = {} # Check if given temporal relation are valid. for topo in topolist: if topo.upper() not in topologylist: raise SyntaxError("Unpermitted temporal relation name '" + topo + "'") # Create temporal topology for maplistA to maplistB. tb = SpatioTemporalTopologyBuilder() # Dictionary with different spatial variables used for topology builder spatialdict = {'strds': '2D', 'stvds': '2D', 'str3ds': '3D'} # Build spatial temporal topology if self.spatial: tb.build(maplistA, maplistB, spatial=spatialdict[self.stdstype]) else: tb.build(maplistA, maplistB) # Iterate through maps in maplistA and search for relationships given # in topolist. # TODO: Better implementation with less nesting for map_i in maplistA: tbrelations = map_i.get_temporal_relations() for topo in topolist: if topo.upper() in tbrelations.keys(): if assign_val: mapvaluelist = [] if complementdict[topo.upper()] in tbrelations: relationmaplist = tbrelations[complementdict[topo.upper()]] for relationmap in relationmaplist: if "map_value" in dir(relationmap): for element in relationmap.map_value: if isinstance(element, GlobalTemporalVar): if element.get_type() == "boolean": mapvaluelist.append(element.boolean) if all(mapvaluelist): resultbool = True else: resultbool = False if "condition_value" in dir(map_i): if isinstance(map_i.condition_value, list): map_i.condition_value.append(resultbool) if count_map: relationmaplist = tbrelations[topo.upper()] gvar = GlobalTemporalVar() gvar.td = len(relationmaplist) if "map_value" in dir(map_i): map_i.map_value.append(gvar) else: map_i.map_value = gvar resultdict[map_i.get_id()] = map_i resultlist = resultdict.values() # Sort list of maps chronological. resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime) return(resultlist) def eval_toperator(self, operator): """This function evaluates a string containing temporal operations. :param operator: String of temporal operations, e.g. {equal|during,=!:}. :return: List of temporal relations (equal, during), the given function (!:) and the interval/instances (=). .. code-block:: python >>> import grass.temporal as tgis >>> tgis.init() >>> p = tgis.TemporalAlgebraParser() >>> operator = "{equal,:}" >>> p.eval_toperator(operator) (['equal'], '=', ':') >>> operator = "{equal|during,:}" >>> p.eval_toperator(operator) (['equal', 'during'], '=', ':') >>> operator = "{equal,!:}" >>> p.eval_toperator(operator) (['equal'], '=', '!:') >>> operator = "{equal|during,!:}" >>> p.eval_toperator(operator) (['equal', 'during'], '=', '!:') >>> operator = "{equal|during,=!:}" >>> p.eval_toperator(operator) (['equal', 'during'], '=', '!:') >>> operator = "{equal|during|starts,#}" >>> p.eval_toperator(operator) (['equal', 'during', 'starts'], '=', '#') >>> operator = "{!:}" >>> p.eval_toperator(operator) (['equal'], '=', '!:') >>> operator = "{=:}" >>> p.eval_toperator(operator) (['equal'], '=', ':') >>> operator = "{#}" >>> p.eval_toperator(operator) (['equal'], '=', '#') >>> operator = "{equal|during}" >>> p.eval_toperator(operator) (['equal', 'during'], '=', '') >>> operator = "{equal}" >>> p.eval_toperator(operator) (['equal'], '=', '') >>> operator = "{equal,||}" >>> p.eval_toperator(operator) (['equal'], '=', '||') >>> operator = "{equal|during,&&}" >>> p.eval_toperator(operator) (['equal', 'during'], '=', '&&') """ topologylist = ["EQUAL", "FOLLOWS", "PRECEDES", "OVERLAPS", "OVERLAPPED", "DURING", "STARTS", "FINISHES", "CONTAINS", "STARTED", "FINISHED"] functionlist = [":", "!:", "#"] intervallist = ["=", "|", "&", "+"] comparelist = ["||", "&&"] relations = [] interval = '=' function = '' op = operator.strip('{}') oplist = op.split(',') if len(oplist) > 1: relationlist = oplist[0].split('|') for relation in relationlist: if relation.upper() in topologylist and relation not in relations: relations.append(relation) else: raise SyntaxError("invalid syntax") opright = oplist[1] if opright in comparelist: function = opright elif opright[0] in intervallist: interval = opright[0] if opright[1:] in functionlist: function = opright[1:] else: raise SyntaxError("invalid syntax") elif opright in functionlist: function = opright else: raise SyntaxError("invalid syntax") elif all([rel.upper() in topologylist for rel in oplist[0].split('|')]): relations = oplist[0].split('|') else: relations = ['equal'] opstr = str(oplist[0]) if opstr[0] in intervallist: interval = opstr[0] if opstr[1:] in functionlist: function = opstr[1:] else: raise SyntaxError("invalid syntax") elif opstr in functionlist: function = opstr #else: #raise SyntaxError("invalid syntax") return(relations, interval, function) def perform_temporal_selection(self, maplistA, maplistB, topolist=["EQUAL"], inverse=False, assign_val=False): """This function performs temporal selection operation. :param maplistA: List of maps representing the left side of a temporal expression. :param maplistB: List of maps representing the right side of a temporal expression. :param topolist: List of strings of temporal relations. :param inverse: Boolean value that specifies if the selection should be inverted. :param assign_val: Boolean for assigning a boolean map value based on the map_values from the compared map list by topological relationships. :return: List of selected maps from maplistA. .. code-block:: python >>> import grass.temporal as tgis >>> tgis.init() >>> l = tgis.TemporalAlgebraParser() >>> # Example with two lists of maps >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_relative_time(i, i + 1, "months") ... check = mapB.set_relative_time(i + 5, i + 6, "months") ... mapsA.append(mapA) ... mapsB.append(mapB) >>> resultlist = l.perform_temporal_selection(mapsA, mapsB, ['EQUAL'], ... False) >>> for map in resultlist: ... if map.get_equal(): ... relations = map.get_equal() ... print "Map %s has equal relation to map %s"%(map.get_name(), ... relations[0].get_name()) Map a5 has equal relation to map b0 Map a6 has equal relation to map b1 Map a7 has equal relation to map b2 Map a8 has equal relation to map b3 Map a9 has equal relation to map b4 >>> resultlist = l.perform_temporal_selection(mapsA, mapsB, ['EQUAL'], ... True) >>> for map in resultlist: ... if not map.get_equal(): ... print "Map %s has no equal relation to mapset mapsB"%(map.get_name()) Map a0 has no equal relation to mapset mapsB Map a1 has no equal relation to mapset mapsB Map a2 has no equal relation to mapset mapsB Map a3 has no equal relation to mapset mapsB Map a4 has no equal relation to mapset mapsB """ if not inverse: topolist = self.get_temporal_topo_list(maplistA, maplistB, topolist, assign_val=assign_val) resultlist = topolist else: topolist = self.get_temporal_topo_list(maplistA, maplistB, topolist, assign_val=False) resultlist = [] for map_i in maplistA: if map_i not in topolist: resultlist.append(map_i) if assign_val: if "condition_value" in dir(map_i): map_i.condition_value.append(False) # Sort list of maps chronological. resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime) return(resultlist) def set_granularity(self, maplistA, maplistB, toperator='=', topolist=["EQUAL"]): """This function sets the temporal extends of a list of maps based on another map list. :param maplistB: List of maps. :param maplistB: List of maps. :param toperator: String containing the temporal operator: =, +, &, \|. :param topolist: List of topological relations. :return: List of maps with the new temporal extends. .. code-block:: python >>> import grass.temporal as tgis >>> tgis.init() >>> p = tgis.TemporalAlgebraParser() >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_relative_time(i, i + 1, "months") ... check = mapB.set_relative_time(i*2, i*2 + 2, "months") ... mapsA.append(mapA) ... mapsB.append(mapB) >>> resultlist = p.set_granularity(mapsA, mapsB, toperator = "|", topolist = ["during"]) >>> for map in resultlist: ... start,end,unit = map.get_relative_time() ... print(map.get_id() + ' - start: ' + str(start) + ' end: ' + str(end)) a1@B - start: 0 end: 2 a0@B - start: 0 end: 2 a3@B - start: 2 end: 4 a2@B - start: 2 end: 4 a5@B - start: 4 end: 6 a4@B - start: 4 end: 6 a7@B - start: 6 end: 8 a6@B - start: 6 end: 8 a9@B - start: 8 end: 10 a8@B - start: 8 end: 10 """ topologylist = ["EQUAL", "FOLLOWS", "PRECEDES", "OVERLAPS", "OVERLAPPED", "DURING", "STARTS", "FINISHES", "CONTAINS", "STARTED", "FINISHED"] for topo in topolist: if topo.upper() not in topologylist: raise SyntaxError("Unpermitted temporal relation name '" + topo + "'") # Create temporal topology for maplistA to maplistB. tb = SpatioTemporalTopologyBuilder() # Dictionary with different spatial variables used for topology builder spatialdict = {'strds': '2D', 'stvds': '2D', 'str3ds': '3D'} # Build spatial temporal topology for maplistB to maplistB. if self.spatial: tb.build(maplistA, maplistB, spatial=spatialdict[self.stdstype]) else: tb.build(maplistA, maplistB) resultdict = {} # Iterate through maps in maplistA and search for relationships given # in topolist. for map_i in maplistA: tbrelations = map_i.get_temporal_relations() for topo in topolist: if topo.upper() in tbrelations.keys(): relationmaplist = tbrelations[topo.upper()] for relationmap in relationmaplist: newextend = None if toperator == "&": newextend = map_i.temporal_intersection(relationmap) elif toperator == "|": newextend = map_i.temporal_union(relationmap) elif toperator == "+": newextend = map_i.temporal_disjoint_union(relationmap) elif toperator == "=": resultdict[map_i.get_id()] = map_i if newextend is not None: start = newextend.get_start_time() end = newextend.get_end_time() #print(map_i.get_id() + ' - start: ' + str(start) + ' end: ' + str(end)) if map_i.is_time_absolute(): map_i.set_absolute_time(start, end) else: relunit = map_i.get_relative_time_unit() map_i.set_relative_time(int(start), int(end), relunit) resultdict[map_i.get_id()] = map_i resultlist = resultdict.values() # Sort list of maps chronological. resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime) # Get relations to maplistB per map in A. # Loop over all relations from list # temporal extent = map.temporal_intersection(map) # if temporal extend is None = delete map. return(resultlist) def get_temporal_func_dict(self, map): """ This function creates a dictionary containing temporal functions for a map dataset with time stamp. :param map: Map object with time stamps. :return: Dictionary with temporal functions for given input map. .. code-block:: python >>> import grass.temporal as tgis >>> import datetime >>> tgis.init() >>> l = tgis.TemporalAlgebraParser() >>> # Example with one list of maps >>> # Create one list of maps with equal time stamps >>> for i in range(1): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... check = mapA.set_absolute_time(datetime.datetime(2000,1,1), ... datetime.datetime(2000,10,1)) ... tfuncdict = l.get_temporal_func_dict(mapA) >>> print(tfuncdict["START_YEAR"]) 2000 >>> print(tfuncdict["START_TIME"]) 00:00:00 >>> print(tfuncdict["START_DATE"]) 2000-01-01 >>> print(tfuncdict["START_DATETIME"]) 2000-01-01 00:00:00 """ tvardict = {"START_DOY": None, "START_DOW": None, "START_YEAR": None, "START_MONTH": None, "START_WEEK": None, "START_DAY": None, "START_HOUR": None, "START_MINUTE": None, "START_SECOND": None, "END_DOY": None, "END_DOW": None, "END_YEAR": None, "END_MONTH": None, "END_WEEK": None, "END_DAY": None, "END_HOUR": None, "END_MINUTE": None, "END_SECOND": None, "START_DATE": None, "START_DATETIME": None, "START_TIME": None, "END_DATE": None, "END_DATETIME": None, "END_TIME": None} # Compute temporal function only for maps with absolute time reference. if map.is_time_absolute: # Get datetime of map. start, end = map.get_absolute_time() # Compute DOY via time deltas. yearstart = datetime(start.year, 1, 1) yearend = datetime(end.year, 1, 1) deltastart = start - yearstart deltaend = end - yearend # Evaluate datetime objects and fill in into dict. tvardict["START_DOY"] = deltastart.days + 1 tvardict["START_DOW"] = start.isoweekday() tvardict["START_YEAR"] = start.year tvardict["START_MONTH"] = start.month tvardict["START_WEEK"] = start.isocalendar()[1] tvardict["START_DAY"] = start.day tvardict["START_HOUR"] = start.hour tvardict["START_MINUTE"] = start.minute tvardict["START_SECOND"] = start.second tvardict["END_DOY"] = deltaend.days + 1 tvardict["END_DOW"] = end.isoweekday() tvardict["END_YEAR"] = end.year tvardict["END_MONTH"] = end.month tvardict["END_WEEK"] = end.isocalendar()[1] tvardict["END_DAY"] = end.day tvardict["END_HOUR"] = end.hour tvardict["END_MINUTE"] = end.minute tvardict["END_SECOND"] = end.second tvardict["START_DATE"] = start.date() tvardict["START_DATETIME"] = start tvardict["START_TIME"] = start.time() tvardict["END_DATE"] = end.date() tvardict["END_DATETIME"] = end tvardict["END_TIME"] = end.time() if not map.is_time_absolute: tvardict["START_DATE"] = start.date() tvardict["START_DATETIME"] = start tvardict["START_TIME"] = start.time() tvardict["END_DATE"] = end.date() tvardict["END_DATETIME"] = end tvardict["END_TIME"] = end.time() return(tvardict) def eval_datetime_str(self, tfuncval, comp, value): # Evaluate date object comparison expression. if comp == "<": boolname = eval(str(tfuncval < value)) elif comp == ">": boolname = eval(str(tfuncval > value)) elif comp == "==": boolname = eval(str(tfuncval == value)) elif comp == "<=": boolname = eval(str(tfuncval <= value)) elif comp == ">=": boolname = eval(str(tfuncval >= value)) elif comp == "!=": boolname = eval(str(tfuncval != value)) return(boolname) def eval_global_var(self, gvar, maplist): """ This function evaluates a global variable expression for a map list. For example: start_day() > 5 , end_month() == 2. :param gvar: Object of type GlobalTemporalVar containing temporal. :param maplist: List of map objects. :return: List of maps from maplist with added conditional boolean values. """ # Loop over maps of input map list. for map_i in maplist: # Get dictionary with temporal variables for the map. tfuncdict = self.get_temporal_func_dict(map_i) # Get value from global variable. value = gvar.value # Get comparison operator from global variable, like <, >, <=, >=, ==, != comp_op = gvar.compop # Get temporal function name for global variable. tfunc = gvar.tfunc.upper() # Get value for function name from dictionary. tfuncval = tfuncdict[tfunc] # Check if value has to be transfered to datetime object for comparison. if tfunc in ["START_DATE", "END_DATE"]: timeobj = datetime.strptime(value.replace("\"", ""), '%Y-%m-%d') value = timeobj.date() boolname = self.eval_datetime_str(tfuncval, comp_op, value) elif tfunc in ["START_TIME", "END_TIME"]: timeobj = datetime.strptime(value.replace("\"", ""), '%H:%M:%S') value = timeobj.time() boolname = self.eval_datetime_str(tfuncval, comp_op, value) elif tfunc in ["START_DATETIME", "END_DATETIME"]: timeobj = datetime.strptime(value.replace("\"", ""), '%Y-%m-%d %H:%M:%S') value = timeobj boolname = self.eval_datetime_str(tfuncval, comp_op, value) else: boolname = eval(str(tfuncval) + comp_op + str(value)) # Add conditional boolean value to the map. if "condition_value" in dir(map_i): map_i.condition_value.append(boolname) else: map_i.condition_value = boolname return(maplist) def eval_map_list(self, maplist, thenlist, topolist=["EQUAL"]): """ This function transfers boolean values from temporal expression from one map list to another by their topology. These boolean values are added to the maps as condition_value. :param maplist: List of map objects containing boolean map values. :param thenlist: List of map objects where the boolean values should be added. :return: List of maps from thenlist with added conditional boolean values. """ # Get topology of then statement map list in relation to the other # maplist and assign boolean values of the maplist to the thenlist. containlist = self.perform_temporal_selection(thenlist, maplist, assign_val=True, topolist=topolist) # Inverse selection of maps from thenlist and assigning False values. excludelist = self.perform_temporal_selection(thenlist, maplist, assign_val=True, inverse=True, topolist=topolist) # Combining the selection and inverse selection list. resultlist = containlist + excludelist return(resultlist) def build_condition_list(self, tvarexpr, thenlist, topolist=["EQUAL"]): """This function evaluates temporal variable expressions of a conditional expression related to the map list of the then statement. Global variables or map lists with booleans are compared to the topology of the conclusion map list and a conditional list will be appended to every map. It contain the boolean expressions from these comparisons and optional operators to combine several temporal expressions, like "&&" or "||". For example: td(A) == 1 && start_day() > 5 --> [True || False] (for one map.condition_value in a then map list) :param tvarexpr: List of GlobalTemporalVar objects and map lists. The list is constructed by the TemporalAlgebraParser in order of expression evaluation in the parser. :param thenlist: Map list object of the conclusion statement. It will be compared and evaluated by the conditions. :return: Map list with conditional values for all temporal expressions. .. code-block:: python >>> import grass.temporal as tgis >>> tgis.init() >>> p = tgis.TemporalAlgebraParser() >>> # Example with two lists of maps >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_absolute_time(datetime(2000,1,i + 1), ... datetime(2000,1,i + 2)) ... check = mapB.set_absolute_time(datetime(2000,1,i + 6), ... datetime(2000,1,i + 7)) ... mapsA.append(mapA) ... mapsB.append(mapB) >>> mapsA = p.check_stds(mapsA) >>> mapsB = p.check_stds(mapsB) >>> # Create global expression object. >>> gvarA = tgis.GlobalTemporalVar() >>> gvarA.tfunc = "start_day" >>> gvarA.compop = ">" >>> gvarA.value = 5 >>> gvarB = tgis.GlobalTemporalVar() >>> gvarB.tfunc = "start_day" >>> gvarB.compop = "<=" >>> gvarB.value = 8 >>> gvarOP = tgis.GlobalTemporalVar() >>> gvarOP.relationop = "&&" >>> gvarOP.topology.append("EQUAL") >>> tvarexpr = gvarA >>> result = p.build_condition_list(tvarexpr, mapsA) >>> for map_i in result: ... print(map_i.get_map_id() + ' ' + str(map_i.condition_value)) a0@B [False] a1@B [False] a2@B [False] a3@B [False] a4@B [False] a5@B [True] a6@B [True] a7@B [True] a8@B [True] a9@B [True] >>> tvarexpr = [gvarA, gvarOP, gvarB] >>> result = p.build_condition_list(tvarexpr, mapsB) >>> for map_i in result: ... print(map_i.get_map_id() + ' ' + str(map_i.condition_value)) b0@B [True, ['EQUAL'], '&&', True] b1@B [True, ['EQUAL'], '&&', True] b2@B [True, ['EQUAL'], '&&', True] b3@B [True, ['EQUAL'], '&&', False] b4@B [True, ['EQUAL'], '&&', False] b5@B [True, ['EQUAL'], '&&', False] b6@B [True, ['EQUAL'], '&&', False] b7@B [True, ['EQUAL'], '&&', False] b8@B [True, ['EQUAL'], '&&', False] b9@B [True, ['EQUAL'], '&&', False] """ # Check if the input expression is a valid single global variable. if not isinstance(tvarexpr, list): if isinstance(tvarexpr, GlobalTemporalVar): if tvarexpr.get_type() == "global": # Use method eval_global_var to evaluate expression. resultlist = self.eval_global_var(tvarexpr, thenlist) else: # Check if a given list is a list of maps. if all([issubclass(type(ele), AbstractMapDataset) for ele in tvarexpr]): # Use method eval_map_list to evaluate map_list in comparison # to thenlist. resultlist = self.eval_map_list(tvarexpr, thenlist, topolist) # Loop through the list, search for map lists or global variables. for expr in tvarexpr: if isinstance(expr, list): if all([issubclass(type(ele), AbstractMapDataset) for ele in expr]): # Use method eval_map_list to evaluate map_list resultlist = self.eval_map_list(expr, thenlist, topolist) else: # Recursive function call to look into nested list # elements. self.build_condition_list(expr, thenlist) elif isinstance(expr, GlobalTemporalVar): # Use according functions for different global variable # types. if expr.get_type() == "operator": if all(["condition_value" in dir(map_i) for map_i in thenlist]): # Add operator string to the condition list. [map_i.condition_value.extend(expr.get_type_value()) for map_i in thenlist] if expr.get_type() == "global": # Use method eval_global_var to evaluate expression. resultlist = self.eval_global_var(expr, thenlist) # Sort resulting list of maps chronological. resultlist = sorted(resultlist, key=AbstractDatasetComparisonKeyStartTime) return(resultlist) def eval_condition_list(self, maplist, inverse=False): """ This function evaluates conditional values of a map list. A recursive function is used to evaluate comparison statements from left to right in the given conditional list. For example: [True, '||', False, '&&', True] -> True [True, '||', False, '&&', False] -> False [True, '&&', False, '&&', True] -> False [False, '||', True, '||', False] -> True [False, '&&', True, '&&', True] -> False [True, '&&', True, '&&', True] -> True [True, '&&', True] -> True [True, '&&', False] -> False [False, '||', True] -> True :param tvarexpr: List of GlobalTemporalVar objects and map lists. The list is constructed by the TemporalAlgebraParser in order of expression evaluation in the parser. :return: Map list with conditional values for all temporal expressions. .. code-block:: python >>> import grass.temporal as tgis >>> tgis.init() >>> p = tgis.TemporalAlgebraParser() >>> # Example with two lists of maps >>> # Create two list of maps with equal time stamps >>> mapsA = [] >>> mapsB = [] >>> for i in range(10): ... idA = "a%i@B"%(i) ... mapA = tgis.RasterDataset(idA) ... idB = "b%i@B"%(i) ... mapB = tgis.RasterDataset(idB) ... check = mapA.set_absolute_time(datetime(2000,1,i + 1), ... datetime(2000,1,i + 2)) ... check = mapB.set_absolute_time(datetime(2000,1,i + 6), ... datetime(2000,1,i + 7)) ... mapsA.append(mapA) ... mapsB.append(mapB) >>> mapsA = p.check_stds(mapsA) >>> mapsB = p.check_stds(mapsB) >>> # Create global expression object. >>> gvarA = tgis.GlobalTemporalVar() >>> gvarA.tfunc = "start_day" >>> gvarA.compop = ">" >>> gvarA.value = 5 >>> gvarB = tgis.GlobalTemporalVar() >>> gvarB.tfunc = "start_day" >>> gvarB.compop = "<=" >>> gvarB.value = 8 >>> gvarOP = tgis.GlobalTemporalVar() >>> gvarOP.relationop = "&&" >>> gvarOP.topology.append("EQUAL") >>> tvarexpr = [mapsA, gvarOP,gvarA] """ def recurse_compare(conditionlist): for ele in conditionlist: if ele == '||': ele_index = conditionlist.index(ele) topolist = conditionlist.pop(ele_index - 1) right = conditionlist.pop(ele_index) left = conditionlist.pop(ele_index - 2) if any([left, right]): result = True else: result = False conditionlist[ele_index - 2] = result recurse_compare(conditionlist) if ele == '&&': ele_index = conditionlist.index(ele) topolist = conditionlist.pop(ele_index - 1) right = conditionlist.pop(ele_index) left = conditionlist.pop(ele_index - 2) if all([left, right]): result = True else: result = False conditionlist[ele_index - 2] = result recurse_compare(conditionlist) resultlist = conditionlist return(resultlist) resultlist = [] inverselist = [] for map_i in maplist: if "condition_value" in dir(map_i): # Get condition values from map object. conditionlist = map_i.condition_value #print(map_i.get_map_id() + ' ' + str(map_i.condition_value)) # Evaluate conditions in list with recursive function. resultbool = recurse_compare(conditionlist) # Set conditional value of map to resulting boolean. map_i.condition_value = resultbool # Add all maps that fulfill the conditions to result list. if resultbool[0]: resultlist.append(map_i) else: inverselist.append(map_i) #print(map_i.get_map_id() + ' ' + str(map_i.condition_value)) if inverse: return(inverselist) else: return(resultlist) ########################################################################### def p_statement_assign(self, t): # The expression should always return a list of maps. """ statement : stds EQUALS expr """ if self.run: resultstds = open_new_stds(t[1], self.stdstype, self.temporaltype, "", "", 'mean', dbif=self.dbif, overwrite=self.overwrite) if isinstance(t[3], list): num = len(t[3]) count = 0 if num > 0: dbif, connected = init_dbif(None) for map in t[3]: map.select(dbif=dbif) # map.update() resultstds.register_map(map, dbif=dbif) count += 1 if count % 10 == 0: self.msgr.percent(count, num, 1) resultstds.update_from_registered_maps(dbif=dbif) if connected: dbif.close() t[0] = t[3] else: t[0] = t[3] if self.debug: print t[1], "=", t[3] def p_stds_1(self, t): # Definition of a space time dataset """ stds : NAME """ t[0] = t[1] def p_paren_expr(self, t): """ expr : LPAREN expr RPAREN""" t[0] = t[2] def p_number(self, t): """number : INT | FLOAT """ t[0] = t[1] def p_t_hash(self, t): """ t_hash_var : stds HASH stds | stds HASH expr | expr HASH stds | expr HASH expr """ if self.run: maplistA = self.check_stds(t[1]) maplistB = self.check_stds(t[3]) resultlist = self.get_temporal_topo_list(maplistA, maplistB, count_map=True) t[0] = resultlist def p_t_hash2(self, t): """ t_hash_var : stds T_HASH_OPERATOR stds | stds T_HASH_OPERATOR expr | expr T_HASH_OPERATOR stds | expr T_HASH_OPERATOR expr """ if self.run: maplistA = self.check_stds(t[1]) maplistB = self.check_stds(t[3]) topolist = self.eval_toperator(t[2])[0] resultlist = self.get_temporal_topo_list(maplistA, maplistB, topolist, count_map=True) t[0] = resultlist def p_t_td_var(self, t): """ t_td_var : TD LPAREN stds RPAREN | TD LPAREN expr RPAREN """ if self.run: maplist = self.check_stds(t[3]) for map_i in maplist: if map_i.is_time_absolute: start, end = map_i.get_absolute_time() if end is not None: td = time_delta_to_relative_time(end - start) else: start, end, unit = current.get_relative_time() if end is not None: td = end - start if "map_value" in dir(map_i): gvar = GlobalTemporalVar() gvar.td = td map_i.map_value.append(gvar) else: map_i.map_value = gvar t[0] = maplist else: t[0] = "td(" + str(t[3]) + ")" if self.debug: print "td(" + str(t[3]) + ")" def p_t_time_var(self, t): # Temporal variables that return a double or integer value """ t_var : START_DOY | START_DOW | START_YEAR | START_MONTH | START_WEEK | START_DAY | START_HOUR | START_MINUTE | START_SECOND | END_DOY | END_DOW | END_YEAR | END_MONTH | END_WEEK | END_DAY | END_HOUR | END_MINUTE | END_SECOND """ t[0] = t[1] def p_compare_op(self, t): # Compare operators that are supported for temporal expressions """ comp_op : CEQUALS | UNEQUALS | LOWER | LOWER_EQUALS | GREATER | GREATER_EQUALS """ t[0] = t[1] def p_t_var_expr(self, t): # Examples: # start_month() > 2 # start_day() < 14 # start_day() < start_month() # td() < 31 """ t_var_expr : t_var LPAREN RPAREN comp_op number | t_var LPAREN RPAREN comp_op t_var | t_td_var comp_op number | t_td_var comp_op t_var | t_hash_var comp_op number | t_hash_var comp_op t_var """ if self.run: if len(t) == 4: maplist = self.check_stds(t[1]) comp_op = t[2] for map_i in maplist: for obj in map_i.map_value: if isinstance(obj, GlobalTemporalVar): td = obj.td boolnum = eval(str(td) + comp_op + str(t[3])) gvar = GlobalTemporalVar() gvar.boolean = boolnum if obj.get_type() == "timediff": index = map_i.map_value.index(obj) map_i.map_value[index] = gvar t[0] = maplist if len(t) == 6: if isinstance(t[1], GlobalTemporalVar): pass gvar = GlobalTemporalVar() gvar.tfunc = t[1] gvar.compop = t[4] gvar.value = t[5] t[0] = gvar else: t[0] = True if self.debug: if len(t) == 6: print t[1], t[4], t[5] if len(t) == 4: print t[1], t[2], t[3] def p_t_var_expr_time1(self, t): # Examples: # start_time() == "12:30:00" # start_date() <= "2001-01-01" # start_datetime() > "2001-01-01 12:30:00" """ t_var_expr : START_TIME LPAREN RPAREN comp_op TIME | START_DATE LPAREN RPAREN comp_op DATE | START_DATETIME LPAREN RPAREN comp_op DATETIME | END_TIME LPAREN RPAREN comp_op TIME | END_DATE LPAREN RPAREN comp_op DATE | END_DATETIME LPAREN RPAREN comp_op DATETIME """ if self.run: gvar = GlobalTemporalVar() gvar.tfunc = t[1] gvar.compop = t[4] gvar.value = t[5] t[0] = gvar else: t[0] = True if self.debug: print t[1], t[4], t[5] def p_t_var_expr_time2(self, t): """ t_var_expr : TIME comp_op START_TIME LPAREN RPAREN | DATE comp_op START_DATE LPAREN RPAREN | DATETIME comp_op START_DATETIME LPAREN RPAREN | TIME comp_op END_TIME LPAREN RPAREN | DATE comp_op END_DATE LPAREN RPAREN | DATETIME comp_op END_DATETIME LPAREN RPAREN """ if self.run: reverseop = {"<": ">", ">": "<", "<=": ">=", ">=": "<=", "==": "==", "!=": "!="} gvar = GlobalTemporalVar() gvar.tfunc = t[3] gvar.compop = reverseop[t[2]] gvar.value = t[1] t[0] = gvar else: t[0] = True if self.debug: print(t[4]) print t[1], t[4], t[5] def p_t_var_expr_comp(self, t): """ t_var_expr : t_var_expr AND AND t_var_expr | t_var_expr OR OR t_var_expr """ if self.run: tvarexprA = t[1] tvarexprB = t[4] operator = GlobalTemporalVar() operator.relationop = t[2] + t[3] operator.topology.append("EQUAL") resultlist = [] resultlist.append(tvarexprA) resultlist.append(operator) resultlist.append(tvarexprB) t[0] = resultlist else: t[0] = True if self.debug: print t[1], t[2] + t[3], t[4] def p_t_var_expr_comp_op(self, t): """ t_var_expr : t_var_expr T_COMP_OPERATOR t_var_expr """ if self.run: tvarexprA = t[1] tvarexprB = t[3] operator = GlobalTemporalVar() toperator = self.eval_toperator(t[2])[0] relationop = toperator[2] relations = toperator[0] operator.relationop = relationop operator.topology.extend(relations) resultlist = [] resultlist.append(tvarexprA) resultlist.append(operator) resultlist.append(tvarexprB) t[0] = resultlist else: t[0] = True if self.debug: print t[1], t[2], t[3] def p_expr_t_select(self, t): # Temporal equal selection # The temporal topology relation equals is implicit # Examples: # A : B # Select the part of A that is temporally equal B """ expr : stds T_SELECT stds | expr T_SELECT stds | stds T_SELECT expr | expr T_SELECT expr """ if self.run: # Setup database connection. # Check input stds. maplistA = self.check_stds(t[1]) maplistB = self.check_stds(t[3]) # Perform selection. selectlist = self.perform_temporal_selection(maplistA, maplistB) # Return map list. t[0] = selectlist else: t[0] = t[1] + "*" if self.debug: print t[1] + "* = ", t[1], t[2], t[3] def p_expr_t_not_select(self, t): # Temporal equal selection # The temporal topology relation equals is implicit # Examples: # A !: B # Select the part of A that is temporally unequal to B """ expr : stds T_NOT_SELECT stds | expr T_NOT_SELECT stds | stds T_NOT_SELECT expr | expr T_NOT_SELECT expr """ if self.run: # Check input stds. maplistA = self.check_stds(t[1]) maplistB = self.check_stds(t[3]) # Perform negative selection. selectlist = self.perform_temporal_selection(maplistA, maplistB, inverse=True) # Return map list. t[0] = selectlist else: t[0] = t[1] + "*" if self.debug: print t[1] + "* = ", t[1], t[2], t[3] def p_expr_t_select_operator(self, t): # Temporal equal selection # The temporal topology relation equals is implicit # Examples: # A {!:} B # Select the part of A that is temporally unequal to B # A {:} B # Select the part of A that is temporally equal B # A {equals, !:} B # Select the part of A that is temporally unequal to B # A {during, !:} B # Select the part of A that is temporally not during B # A {overlaps, :} B # Select the part of A that temporally overlaps B # A {overlaps|equals, :} B # Select the part of A that temporally overlaps or equals B """ expr : stds T_SELECT_OPERATOR stds | expr T_SELECT_OPERATOR stds | stds T_SELECT_OPERATOR expr | expr T_SELECT_OPERATOR expr """ if self.run: # Check input stds. maplistA = self.check_stds(t[1]) maplistB = self.check_stds(t[3]) # Evaluate temporal operator. operators = self.eval_toperator(t[2]) # Check for negative selection. if operators[2] == "!:": negation = True else: negation = False # Perform selection. selectlist = self.perform_temporal_selection(maplistA, maplistB, topolist=operators[0], inverse=negation) selectlist = self.set_granularity(selectlist, maplistB, operators[1], operators[0]) # Return map list. t[0] = selectlist else: t[0] = t[1] + "*" if self.debug: print t[1] + "* = ", t[1], t[2], t[3] def p_expr_condition_if(self, t): # Examples # if( start_date() < "2005-06-01", A:B) """ expr : IF LPAREN t_var_expr COMMA stds RPAREN | IF LPAREN t_var_expr COMMA expr RPAREN """ if self.run: # Get stds/map list of then statement. thenlist = self.check_stds(t[5]) # Get temporal conditional statement. tvarexpr = t[3] thencond = self.build_condition_list(tvarexpr, thenlist) thenresult = self.eval_condition_list(thencond) # Clear the map and conditional values of the map list. resultlist = self.check_stds(thenresult, clear=True) # Return resulting map list. t[0] = resultlist else: t[0] = t[5] + "*" if self.debug: print str(t[5]) + "* = ", "if condition", str(t[3]), ' then ', str(t[5]) def p_expr_condition_if_relation(self, t): # Examples # if({equal} start_date() < "2005-06-01", A:B) """ expr : IF LPAREN T_REL_OPERATOR COMMA t_var_expr COMMA stds RPAREN | IF LPAREN T_REL_OPERATOR COMMA t_var_expr COMMA expr RPAREN """ if self.run: # Get stds/map list of then statement. thenlist = self.check_stds(t[7]) # Get temporal conditional statement. tvarexpr = t[5] topolist = self.eval_toperator(t[3])[0] thencond = self.build_condition_list(tvarexpr, thenlist, topolist) thenresult = self.eval_condition_list(thencond) # Clear the map and conditional values of the map list. resultlist = self.check_stds(thenresult, clear=True) # Return resulting map list. t[0] = resultlist else: t[0] = t[7] + "*" if self.debug: print "result* = ", "if ", str(t[3]), "condition", str(t[5]), " then ", str(t[7]) def p_expr_condition_elif(self, t): # Examples # if( start_date() < "2005-06-01", if(start_time() < "12:30:00", A:B), A!:B) """ expr : IF LPAREN t_var_expr COMMA stds COMMA stds RPAREN | IF LPAREN t_var_expr COMMA stds COMMA expr RPAREN | IF LPAREN t_var_expr COMMA expr COMMA stds RPAREN | IF LPAREN t_var_expr COMMA expr COMMA expr RPAREN """ if self.run: # Get stds/map list of then statement. thenlist = self.check_stds(t[5]) elselist = self.check_stds(t[7]) # Get temporal conditional statement for then and else expressions. tvarexpr = t[3] thencond = self.build_condition_list(tvarexpr, thenlist) thenresult = self.eval_condition_list(thencond) elsecond = self.build_condition_list(tvarexpr, elselist) elseresult = self.eval_condition_list(elsecond, inverse=True) # Combine and sort else and then statement to result map list. combilist = thenresult + elseresult resultlist = sorted(combilist, key=AbstractDatasetComparisonKeyStartTime) # Clear the map and conditional values of the map list. resultlist = self.check_stds(resultlist, clear=True) # Return resulting map list. t[0] = resultlist else: t[0] = t[5] + "*" if self.debug: print str(t[5]) + "* = ", "if condition", str(t[3]), " then ", str(t[5]), ' else ', str(t[7]) def p_expr_condition_elif_relation(self, t): # Examples # if({equal}, start_date() < "2005-06-01", if(start_time() < "12:30:00", A:B), A!:B) # The then and else statement using the same topological relationships. # Feature request: Independent relationships for then and else to conditions. """ expr : IF LPAREN T_REL_OPERATOR COMMA t_var_expr COMMA stds COMMA stds RPAREN | IF LPAREN T_REL_OPERATOR COMMA t_var_expr COMMA stds COMMA expr RPAREN | IF LPAREN T_REL_OPERATOR COMMA t_var_expr COMMA expr COMMA stds RPAREN | IF LPAREN T_REL_OPERATOR COMMA t_var_expr COMMA expr COMMA expr RPAREN """ if self.run: # Get stds/map list of then statement. thenlist = self.check_stds(t[7]) elselist = self.check_stds(t[9]) # Get temporal conditional statement. tvarexpr = t[5] topolist = self.eval_toperator(t[3])[0] thencond = self.build_condition_list(tvarexpr, thenlist, topolist) thenresult = self.eval_condition_list(thencond) elsecond = self.build_condition_list(tvarexpr, elselist, topolist) elseresult = self.eval_condition_list(elsecond, inverse=True) # Combine and sort else and then statement to result map list. combilist = thenresult + elseresult resultlist = sorted(combilist, key=AbstractDatasetComparisonKeyStartTime) # Clear the map and conditional values of the map list. resultlist = self.check_stds(resultlist, clear=True) # Return resulting map list. t[0] = resultlist else: if t[5]: t[0] = str(t[7]) else: t[0] = str(t[9]) if self.debug: if t[5]: print str(t[7]), "* = ", "if condition", str(t[5]), " then ", str(t[7]), ' else ', str(t[9]) else: print str(t[9]), "* = ", "if condition", str(t[5]), " then ", str(t[7]), ' else ', str(t[9]) def p_expr_t_buff(self, t): # Examples # buff_t(A : B, "10 minutes") # Select the part of A that is temporally # equal to B and create a buffer of 10 minutes around """ expr : BUFF_T LPAREN stds COMMA QUOTE number NAME QUOTE RPAREN | BUFF_T LPAREN expr COMMA QUOTE number NAME QUOTE RPAREN | BUFF_T LPAREN stds COMMA number RPAREN | BUFF_T LPAREN expr COMMA number RPAREN """ if self.run: # Check input stds. bufflist = self.check_stds(t[3]) for map in bufflist: # Get increment format. if len(t) == 10: increment = str(t[6]) + " " + t[7] elif len(t) == 7: increment = str(t[5]) # Perform buffering. map.temporal_buffer(increment) t[0] = bufflist else: t[0] = t[3] + "*" if self.debug: if len(t) == 10: print str(t[3]) + "* = buff_t(", str(t[3]), "," , '"', str(t[6]), str(t[7]), '"', ")" elif len(t) == 7: print str(t[3]) + "* = buff_t(", str(t[3]), ",", str(t[5]), ")" def p_expr_t_snap(self, t): # Examples # tsnap(A : B) # Snap the maps of A temporally. """ expr : TSNAP LPAREN stds RPAREN | TSNAP LPAREN expr RPAREN """ if self.run: # Check input stds. maplist = self.check_stds(t[3]) # Perform snapping. snaplist = AbstractSpaceTimeDataset.snap_map_list(maplist) t[0] = snaplist else: t[0] = t[3] + "*" if self.debug: print str(t[3]) + "* = tsnap(", str(t[3]), ")" def p_expr_t_shift(self, t): # Examples # tshift(A : B, "10 minutes") # Shift the selection from A temporally # by 10 minutes. """ expr : TSHIFT LPAREN stds COMMA QUOTE number NAME QUOTE RPAREN | TSHIFT LPAREN expr COMMA QUOTE number NAME QUOTE RPAREN | TSHIFT LPAREN stds COMMA number RPAREN | TSHIFT LPAREN expr COMMA number RPAREN """ if self.run: # Check input stds. maplist = self.check_stds(t[3]) # Get increment format. if len(t) == 10: increment = str(t[6]) + " " + t[7] elif len(t) == 7: increment = str(t[5]) # Perform shifting. shiftlist = AbstractSpaceTimeDataset.shift_map_list(maplist, increment) t[0] = shiftlist else: t[0] = t[3] + "*" if self.debug: if len(t) == 10: print str(t[3]) + "* = tshift(", str(t[3]), "," , '"', str(t[6]), str(t[7]), '"', ")" elif len(t) == 7: print str(t[3]) + "* = tshift(", str(t[3]), ",", str(t[5]), ")" # Handle errors. def p_error(self, t): if t: raise SyntaxError("syntax error on line %d, token %s near '%s'" " expression '%s'" % (t.lineno, t.type, t.value, self.expression)) else: raise SyntaxError("Unexpected syntax error") ############################################################################### if __name__ == "__main__": import doctest doctest.testmod()