org.geotools.filter.function.math
Class PiFunction
Object
ExpressionAbstract
DefaultExpression
FunctionExpressionImpl
PiFunction
- All Implemented Interfaces:
- Factory, ExpressionType, FunctionExpression, Expression, Function
public class PiFunction
- extends FunctionExpressionImpl
Allow access to the value of Math.PI as an expression
- Since:
- 2.2, 2.5
- Author:
- Jody Garnett
- Module:
modules/library/main (gt-main.jar)
Fields inherited from interface ExpressionType |
ATTRIBUTE, ATTRIBUTE_DOUBLE, ATTRIBUTE_GEOMETRY, ATTRIBUTE_INTEGER, ATTRIBUTE_STRING, ATTRIBUTE_UNDECLARED, FUNCTION, LITERAL_DOUBLE, LITERAL_GEOMETRY, LITERAL_INTEGER, LITERAL_LONG, LITERAL_STRING, LITERAL_UNDECLARED, MATH_ADD, MATH_DIVIDE, MATH_MULTIPLY, MATH_SUBTRACT |
Fields inherited from interface Expression |
NIL |
Fields inherited from interface Expression |
NIL |
Method Summary |
Object |
evaluate(Object object)
This method checks if the object is an instance of Feature and
if so, calls through to #evaluate(Feature) . |
int |
getArgCount()
Gets the number of arguments that are set. |
String |
toString()
Creates a String representation of this Function with
the function name and the arguments. |
Methods inherited from class FunctionExpressionImpl |
accept, equals, getArgs, getExpression, getFallbackValue, getImplementationHints, getName, getParameters, getType, setArgs, setFallbackValue, setName, setParameters |
Methods inherited from interface Expression |
evaluate |
Methods inherited from interface Expression |
evaluate |
PiFunction
public PiFunction()
getArgCount
public int getArgCount()
- Description copied from class:
FunctionExpressionImpl
- Gets the number of arguments that are set.
- Specified by:
getArgCount
in interface FunctionExpression
- Specified by:
getArgCount
in class FunctionExpressionImpl
- Returns:
- the number of args.
toString
public String toString()
- Description copied from class:
FunctionExpressionImpl
- Creates a String representation of this Function with
the function name and the arguments. The String created
should be good for most subclasses
- Overrides:
toString
in class FunctionExpressionImpl
evaluate
public Object evaluate(Object object)
- Description copied from class:
DefaultExpression
- This method checks if the object is an instance of
Feature
and
if so, calls through to #evaluate(Feature)
. This is done
to maintain backwards compatability with previous version of Expression api
which depended on Feature. If the object is not an instance of feature
the super implementation is called.
- Specified by:
evaluate
in interface Expression
- Overrides:
evaluate
in class DefaultExpression
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