org.deegree.filter.expression
Class Literal<T>

java.lang.Object
  org.deegree.filter.expression.Literal<T>

Type Parameters:

T - besides primitive types, this may also be GenericCustomPropertyValue

All Implemented Interfaces:

Expression

public class Literal<T>
extends Object
implements Expression

Expression that has a constant value.

Version:

$Revision:$, $Date:$

Author:

Markus Schneider , last edited by: $Author:$

Nested Class Summary

Nested classes/interfaces inherited from interface org.deegree.filter.Expression

Expression.Type

Constructor Summary

Literal(T value)
Creates a new Literal instance.

Method Summary

Object[]	evaluate(MatchableObject obj) Returns the Literal's value (to be used in the evaluation of a complexer Expression).
Expression[]	getParams() Returns the expression's paramters.
Expression.Type	getType() Returns the type of expression.
T	getValue() Returns the literal's value.
String	toString(String indent)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Literal

public Literal(T value)

Creates a new Literal instance.

Parameters:

value - value of the literal

Method Detail

getValue

public T getValue()

Returns the literal's value.

Returns:

the literal's value

getType

public Expression.Type getType()

Description copied from interface: Expression

Returns the type of expression. Use this to safely determine the subtype of Expression.

Specified by:

getType in interface Expression

Returns:

type of expression

evaluate

public Object[] evaluate(MatchableObject obj)

Returns the Literal's value (to be used in the evaluation of a complexer Expression).

Specified by:

evaluate in interface Expression

Parameters:

obj - object that the expression is evaluated upon

Returns:

the values of the expression, may be empty (and even contain null values), but never null

toString

public String toString(String indent)

Specified by:

toString in interface Expression

getParams

public Expression[] getParams()

Description copied from interface: Expression

Returns the expression's paramters.

Specified by:

getParams in interface Expression

Returns:

the parameters of the expression