net.timewalker.ffmq4.common.message.selector.expression

Class SelectorNode

java.lang.Object

net.timewalker.ffmq4.common.message.selector.expression.SelectorNode

Direct Known Subclasses:

AbstractBinaryOperator, AbstractUnaryOperator, BetweenOperator, Identifier, Literal, StringLiteralList

public abstract class SelectorNode
extends Object

Base implementation for a message selector language node.

Constructor Summary

Constructors

Constructor and Description
SelectorNode()

Method Summary

Modifier and Type	Method and Description
abstract Object	evaluate(javax.jms.Message message) Evaluate the node
Boolean	evaluateBoolean(javax.jms.Message message) Evaluate this node as a boolean
Number	evaluateNumeric(javax.jms.Message message) Evaluate this node as a number
String	evaluateString(javax.jms.Message message) Evaluate this node as a string
protected int	getNodeType(Object value) Get the type of a given value
protected Object	negate(Object value) Negate a boolean value
protected String	parenthesize(SelectorNode node)

Methods inherited from class java.lang.Object

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

Constructor Detail

SelectorNode

public SelectorNode()

Method Detail

evaluate

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

Evaluate the node

Throws:

javax.jms.JMSException

negate

protected final Object negate(Object value)

Negate a boolean value

evaluateBoolean

public final Boolean evaluateBoolean(javax.jms.Message message)
                              throws javax.jms.JMSException

Evaluate this node as a boolean

Throws:

javax.jms.JMSException

evaluateNumeric

public final Number evaluateNumeric(javax.jms.Message message)
                             throws javax.jms.JMSException

Evaluate this node as a number

Throws:

javax.jms.JMSException

evaluateString

public final String evaluateString(javax.jms.Message message)
                            throws javax.jms.JMSException

Evaluate this node as a string

Throws:

javax.jms.JMSException

getNodeType

protected final int getNodeType(Object value)

Get the type of a given value

parenthesize

protected final String parenthesize(SelectorNode node)