org.apache.qpid.filter

Class LogicExpression

java.lang.Object

org.apache.qpid.filter.BinaryExpression

org.apache.qpid.filter.LogicExpression

All Implemented Interfaces:

BooleanExpression, Expression

public abstract class LogicExpression
extends BinaryExpression
implements BooleanExpression

A filter performing a comparison of two objects

Constructor Summary

Constructors

Constructor and Description
LogicExpression(BooleanExpression left, BooleanExpression right)

Method Summary

Methods

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

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

equals, getExpressionSymbol, getLeft, getRight, hashCode, 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(FilterableMessage message)

Specified by:

evaluate in interface Expression

Parameters:

message - message to evaluate

Returns:

the value of this expression

matches

public boolean matches(FilterableMessage message)

Specified by:

matches in interface BooleanExpression

Parameters:

message - message to match

Returns:

true if the expression evaluates to Boolean.TRUE.