org.apache.slide.search.basic.expression
Class EmptyExpression

java.lang.Object
  org.apache.slide.search.basic.expression.EmptyExpression

All Implemented Interfaces:

IBasicExpression

public class EmptyExpression

extends java.lang.Object

implements IBasicExpression

Represents an AND expression.

Version:

$Revision: 1.5 $

Field Summary

protected ComparableResourcesPool

requestedResourcesPool The pool of resources to apply the expression to.

Constructor Summary

EmptyExpression(ComparableResourcesPool requestedResourcesPool)
Creates an empty expression.

Method Summary

IBasicResultSet	execute() Executes the expression.
IBasicExpressionFactory	getFactory() Method getFactory
void	setFactory(IBasicExpressionFactory factory) Method setFactory
java.lang.String	toString() String representation for debugging purposes.

Methods inherited from class java.lang.Object

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

Field Detail

requestedResourcesPool

protected ComparableResourcesPool requestedResourcesPool

The pool of resources to apply the expression to.

Constructor Detail

EmptyExpression

public EmptyExpression(ComparableResourcesPool requestedResourcesPool)

Creates an empty expression. This occurs when no clause was supplied

Parameters:

requestedResourcesPool - the pool of resources to apply the expression to.

Method Detail

execute

public IBasicResultSet execute()
                        throws SearchException

Executes the expression.

Specified by:

execute in interface IBasicExpression

Returns:

a Set of RequestedResource objects

Throws:

SearchException

setFactory

public void setFactory(IBasicExpressionFactory factory)

Method setFactory

Specified by:

setFactory in interface IBasicExpression

Parameters:

factory - an IBasicExpressionFactory

getFactory

public IBasicExpressionFactory getFactory()

Method getFactory

Specified by:

getFactory in interface IBasicExpression

Returns:

an IBasicExpressionFactory

toString

public java.lang.String toString()

String representation for debugging purposes.

Returns:

this expression as String