python.selection Namespace Reference

Functions
	convertNumber (t)
	make_parser (payload_specification)
	make_browse_objects_selection (folder, selection)

Variables
	sign = oneOf('+ -')
	integer = Word(nums)
	number
tuple	boolValue
	stringValue = QuotedString("'") | QuotedString('"')
tuple	value = boolValue | number | stringValue
	variable = Word(alphanums, min=1)

Function Documentation

convertNumber()

python.selection.convertNumber

(

t

)

Definition at line 10 of file selection.py.

def convertNumber(t):
    if t.is_float: 
        return float(t[0])
    else: 
        return int(t[0])
 
# Number defintion

make_browse_objects_selection()

python.selection.make_browse_objects_selection	(		folder,
			selection )

Definition at line 82 of file selection.py.

def make_browse_objects_selection(folder, selection):
    parser = make_parser(folder.folderSpecification().payloadSpecification())
    return parser(selection)

make_parser()

python.selection.make_parser

(

payload_specification

)

The parser has to be payload_specification specific because it needs to know
the types of the records to build a FieldSelection.

Definition at line 35 of file selection.py.

def make_parser(payload_specification):
    """
    The parser has to be payload_specification specific because it needs to know
    the types of the records to build a FieldSelection.
    """
 
    def make_selection(string, location, tokens):
        variable, comparator, value = tokens
        if payload_specification and variable not in payload_specification:
            raise RuntimeError("%s is not a value in the folder payload "
                               "specification")
        elif not payload_specification:
            return (variable, comparator, value)                              
        typeid = payload_specification[variable].storageType().id()
        return make_fieldselection(variable, typeid, comparator, value)
 
    from PyCool import cool
    EQ = Literal("==").setParseAction(lambda t: cool.FieldSelection.EQ)
    NE = Literal("!=").setParseAction(lambda t: cool.FieldSelection.NE)
    GE = Literal(">=").setParseAction(lambda t: cool.FieldSelection.GE)
    LE = Literal("<=").setParseAction(lambda t: cool.FieldSelection.LE)
    GT = Literal(">") .setParseAction(lambda t: cool.FieldSelection.GT)
    LT = Literal("<") .setParseAction(lambda t: cool.FieldSelection.LT)
    comparator = EQ | NE | GE | LE | GT | LT
    operand = (variable + comparator + value).setParseAction(make_selection)
 
    orop = Literal("or").suppress()
    andop = Literal("and").suppress()
 
    def logic_builder(connective):
        def thunk(string, location, tokens):
            vec = make_selection_vector()
            for token in tokens[0]:
                vec.push_back(token)
            
            return cool.CompositeSelection(connective, vec)
        return thunk
 
    expr = StringStart() + operatorPrecedence( operand,
        [(andop, 2, opAssoc.LEFT, logic_builder(cool.CompositeSelection.AND)),
         (orop,  2, opAssoc.LEFT, logic_builder(cool.CompositeSelection.OR)),]
        ) + StringEnd()
    
    def go(selection):
        return expr.parseString(selection)[0]
    return go
        

Variable Documentation

boolValue

tuple python.selection.boolValue

Initial value:

=  (Literal("True") .setParseAction(lambda t: True) |
             Literal("False").setParseAction(lambda t: False))

Definition at line 28 of file selection.py.

integer

python.selection.integer = Word(nums)

Definition at line 18 of file selection.py.

number

python.selection.number

Initial value:

=  Combine(
          Optional(sign)
                 + (   ( integer + Optional('.')('is_float') + Optional(integer))
                     | (            Literal('.')('is_float') + Optional(integer))
                   )
                 + Optional( CaselessLiteral('E') + Optional(sign) + integer)('is_float')
        ).setParseAction(convertNumber)

Definition at line 20 of file selection.py.

sign

python.selection.sign = oneOf('+ -')

Definition at line 17 of file selection.py.

stringValue

python.selection.stringValue = QuotedString("'") | QuotedString('"')

Definition at line 30 of file selection.py.

value

tuple python.selection.value = boolValue | number | stringValue

Definition at line 31 of file selection.py.

variable

python.selection.variable = Word(alphanums, min=1)

Definition at line 33 of file selection.py.