org.apache.qpid.jms.selector.filter

Class LogicExpression

java.lang.Object

org.apache.qpid.jms.selector.filter.BinaryExpression

org.apache.qpid.jms.selector.filter.LogicExpression

All Implemented Interfaces:

BooleanExpression, Expression

public abstract class LogicExpression
extends BinaryExpression
implements BooleanExpression

A filter performing a comparison of two objects

Field Summary

Fields inherited from class org.apache.qpid.jms.selector.filter.BinaryExpression

left, right

Constructor Summary

Constructors

Constructor and Description
LogicExpression(BooleanExpression left, BooleanExpression right)

Method Summary

Modifier and Type	Method and Description
static BooleanExpression	createAND(BooleanExpression lvalue, BooleanExpression rvalue)
static BooleanExpression	createOR(BooleanExpression lvalue, BooleanExpression rvalue)
abstract Object	evaluate(Filterable message)
boolean	matches(Filterable message)

Methods inherited from class org.apache.qpid.jms.selector.filter.BinaryExpression

equals, getExpressionSymbol, getLeft, getRight, hashCode, setLeft, setRight, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicExpression

public LogicExpression(BooleanExpression left,
                       BooleanExpression right)

Method Detail

createOR

public static BooleanExpression createOR(BooleanExpression lvalue,
                                         BooleanExpression rvalue)

createAND

public static BooleanExpression createAND(BooleanExpression lvalue,
                                          BooleanExpression rvalue)

evaluate

public abstract Object evaluate(Filterable message)
                         throws FilterException

Specified by:

evaluate in interface Expression

Parameters:

message - The message that is being selected against.

Returns:

the value of this expression

Throws:

FilterException - if an error occurs during evaluation.

matches

public boolean matches(Filterable message)
                throws FilterException

Specified by:

matches in interface BooleanExpression

Returns:

true if the expression evaluates to Boolean.TRUE.

Throws:

FilterException