org.geotools.filter.expression
Class AddImpl

Object
  ExpressionAbstract
      DefaultExpression
          MathExpressionImpl
              AddImpl

All Implemented Interfaces:

ExpressionType, MathExpression, Add, BinaryExpression, Expression

public class AddImpl
extends MathExpressionImpl
implements Add

Implementation of Add expression.

Author:

Justin Deoliveira, The Open Planning Project, jdeolive@openplans.org

Field Summary

Fields inherited from class DefaultExpression

expressionType, permissiveConstruction

Fields inherited from interface Add

NAME

Fields inherited from interface Expression

NIL

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

Constructor Summary

AddImpl(Expression expr1, Expression expr2)

Method Summary

Object	accept(ExpressionVisitor visitor, Object extraData) Accepts a visitor.
boolean	equals(Object obj) Compares this expression to the specified object.
Object	evaluate(Object feature) This method checks if the object is an instance of Feature and if so, calls through to #evaluate(Feature).
int	hashCode() Override of hashCode method.
String	toString()

Methods inherited from class MathExpressionImpl

addLeftValue, addRightValue, ensureOperandsSet, getExpression1, getExpression2, getLeftValue, getRightValue, getType, number, setExpression1, setExpression2

Methods inherited from class DefaultExpression

accept, evaluate, getValue, isAttributeExpression, isExpression, isFunctionExpression, isGeometryExpression, isLiteralExpression, isMathExpression, isMathExpression

Methods inherited from class ExpressionAbstract

eval, eval, evaluate

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface BinaryExpression

getExpression1, getExpression2

Methods inherited from interface Expression

evaluate

Methods inherited from interface MathExpression

getValue

Methods inherited from interface Expression

accept, evaluate

Constructor Detail

AddImpl

public AddImpl(Expression expr1,
               Expression expr2)

Method Detail

evaluate

public Object evaluate(Object feature)
                throws IllegalArgumentException

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

Throws:

IllegalArgumentException

accept

public Object accept(ExpressionVisitor visitor,
                     Object extraData)

Description copied from interface: Expression

Accepts a visitor. Subclasses must implement with a method whose content is the following:

return visitor.visit(this, extraData);

Specified by:

accept in interface Expression

equals

public boolean equals(Object obj)

Compares this expression to the specified object. Returns true if the

Overrides:

equals in class Object

Parameters:

obj - - the object to compare this expression against.

Returns:

true if specified object is equal to this expression; false otherwise.

hashCode

public int hashCode()

Override of hashCode method.

Overrides:

hashCode in class Object

Returns:

a hash code value for this add expression.

toString

public String toString()

Overrides:

toString in class Object