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org.activemq.filter
Class ConstantExpression  

java.lang.Object
  org.activemq.filter.ConstantExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

ConstantExpression.BooleanConstantExpression

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public class ConstantExpression

extends java.lang.Object

implements Expression

Represents a constant expression

Version:

$Revision: 1.1.1.1 $

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Nested Class Summary
(package private) static class	ConstantExpression.BooleanConstantExpression

 

Field Summary
static ConstantExpression.BooleanConstantExpression	FALSE
static ConstantExpression.BooleanConstantExpression	NULL
static ConstantExpression.BooleanConstantExpression	TRUE
private  java.lang.Object	value

 

Constructor Summary

ConstantExpression(java.lang.Object value)

 

Method Summary
static ConstantExpression	createFloat(java.lang.String text)
static ConstantExpression	createFromDecimal(java.lang.String text)
static ConstantExpression	createFromHex(java.lang.String text)
static ConstantExpression	createFromOctal(java.lang.String text)
static java.lang.String	encodeString(java.lang.String s)           Encodes the value of string so that it looks like it would look like when it was provided in a selector.
boolean	equals(java.lang.Object o)           TODO: more efficient hashCode()
java.lang.Object	evaluate(javax.jms.Message message)
java.lang.Object	getValue()
int	hashCode()           TODO: more efficient hashCode()
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

NULL

public static final ConstantExpression.BooleanConstantExpression NULL

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TRUE

public static final ConstantExpression.BooleanConstantExpression TRUE

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FALSE

public static final ConstantExpression.BooleanConstantExpression FALSE

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value

private java.lang.Object value

Constructor Detail

ConstantExpression

public ConstantExpression(java.lang.Object value)

Method Detail

createFromDecimal

public static ConstantExpression createFromDecimal(java.lang.String text)

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createFromHex

public static ConstantExpression createFromHex(java.lang.String text)

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createFromOctal

public static ConstantExpression createFromOctal(java.lang.String text)

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createFloat

public static ConstantExpression createFloat(java.lang.String text)

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evaluate

public java.lang.Object evaluate(javax.jms.Message message)
                          throws javax.jms.JMSException

Specified by:

evaluate in interface Expression

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getValue

public java.lang.Object getValue()

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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hashCode

public int hashCode()

TODO: more efficient hashCode()

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equals

public boolean equals(java.lang.Object o)

TODO: more efficient hashCode()

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encodeString

public static java.lang.String encodeString(java.lang.String s)

Encodes the value of string so that it looks like it would look like when it was provided in a selector.

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