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java.lang.Objectorg.geotools.filter.expression.ExpressionAbstract
org.geotools.filter.DefaultExpression
org.geotools.filter.FunctionExpressionImpl
org.geotools.filter.function.math.PiFunction
public class PiFunction
Allow access to the value of Math.PI as an expression
Field Summary |
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Fields inherited from class org.geotools.filter.FunctionExpressionImpl |
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fallback, name, params |
Fields inherited from class org.geotools.filter.DefaultExpression |
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expressionType, permissiveConstruction |
Fields inherited from interface org.geotools.filter.ExpressionType |
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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 org.opengis.filter.expression.Expression |
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NIL |
Constructor Summary | |
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PiFunction()
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Method Summary | |
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java.lang.Object |
evaluate(java.lang.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. |
java.lang.String |
toString()
Creates a String representation of this Function with the function name and the arguments. |
Methods inherited from class org.geotools.filter.FunctionExpressionImpl |
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accept, equals, getArgs, getExpression, getFallbackValue, getImplementationHints, getName, getParameters, getType, setArgs, setFallbackValue, setName, setParameters |
Methods inherited from class org.geotools.filter.DefaultExpression |
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accept, evaluate, getValue, isAttributeExpression, isExpression, isFunctionExpression, isGeometryExpression, isLiteralExpression, isMathExpression, isMathExpression |
Methods inherited from class org.geotools.filter.expression.ExpressionAbstract |
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eval, eval, evaluate |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.geotools.filter.Expression |
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accept, evaluate, getValue |
Methods inherited from interface org.opengis.filter.expression.Expression |
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evaluate |
Constructor Detail |
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public PiFunction()
Method Detail |
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public int getArgCount()
FunctionExpressionImpl
getArgCount
in interface FunctionExpression
getArgCount
in class FunctionExpressionImpl
public java.lang.String toString()
FunctionExpressionImpl
toString
in class FunctionExpressionImpl
public java.lang.Object evaluate(java.lang.Object object)
DefaultExpression
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.
evaluate
in interface org.opengis.filter.expression.Expression
evaluate
in class DefaultExpression
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