src.openwfe.org.engine.expressions.DefinedExpression Maven / Gradle / Ivy
/*
* Copyright (c) 2001-2006, John Mettraux, OpenWFE.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* . Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* . Neither the name of the "OpenWFE" nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $Id: DefinedExpression.java 2667 2006-05-24 22:33:06Z jmettraux $
*/
//
// DefinedExpression.java
//
// [email protected]
//
// generated with
// jtmpl 1.0.04 31.10.2002 John Mettraux ([email protected])
//
package openwfe.org.engine.expressions;
import openwfe.org.engine.workitem.InFlowWorkItem;
/**
* An expression that returns 'true' if a given field or variable
* is defined.
*
* CVS Info :
*
$Author: jmettraux $
*
$Date: 2006-05-25 00:33:06 +0200 (Thu, 25 May 2006) $
*
$Id: DefinedExpression.java 2667 2006-05-24 22:33:06Z jmettraux $
*
* @author [email protected]
*/
public class DefinedExpression
extends ZeroChildExpression
implements BooleanExpression
{
//
// CONSTANTS
//
// FIELDS
//
// CONSTRUCTORS
//
// METHODS
public void apply (InFlowWorkItem wi)
throws ApplyException
{
Object value = null;
try
{
value = ValueUtils.determineValue(this, wi);
}
catch (ValueException ve)
{
throw new ApplyException
("Failed to find value for decision", ve);
}
//getExpressionPool().setVariableInParent
// (this, ValueUtils.BOOLEAN_RESULT, new Boolean(value != null));
ValueUtils.setBooleanResult(wi, (value != null));
applyToParent(wi);
}
}