src.openwfe.org.engine.expressions.SetValueExpression 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: SetValueExpression.java 2575 2006-05-08 11:52:39Z jmettraux $
*/
//
// SetValueExpression.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;
/**
* Sets the value of a variable in the scope of the PARENT expression.
*
* This expression uses ValueUtils a lot.
*
* Since OpenWFE 1.5.1pre2, this expression implements DefinitionExpression
* and can thus be found outside of the body of a flow.
*
* @see ValueUtils
*
* CVS Info :
*
$Author: jmettraux $
*
$Date: 2006-05-08 13:52:39 +0200 (Mon, 08 May 2006) $
*
$Id: SetValueExpression.java 2575 2006-05-08 11:52:39Z jmettraux $
*
* @author [email protected]
*/
public class SetValueExpression
extends OneChildExpression
implements DefinitionExpression, WithChildren
{
private final static org.apache.log4j.Logger log = org.apache.log4j.Logger
.getLogger(SetValueExpression.class.getName());
//
// CONSTANTS
//
// FIELDS
//
// CONSTRUCTORS
//
// METHODS from FlowExpression
public void apply (final InFlowWorkItem wi)
throws ApplyException
{
//this.debugDump();
log.debug("apply() "+getId());
log.debug("apply() environmentId "+getEnvironmentId());
log.debug("apply() has child ? "+(getChildExpressionId() != null));
if (getChildExpressionId() == null)
{
try
{
this.reply(wi);
}
catch (final ReplyException e)
{
throw new ApplyException
("Failed to determine or set value", e);
}
}
else
{
getExpressionPool().apply(getChildExpressionId(), wi);
}
}
public void reply (final InFlowWorkItem wi)
throws ReplyException
{
try
{
eval(wi);
}
catch (final ApplyException ae)
{
throw new ReplyException("Failed to determine/set value", ae);
}
replyToParent(wi);
}
//
// METHODS
public Object eval (final InFlowWorkItem wi)
throws ApplyException
{
log.debug("eval()");
Object value = null;
if (getChildExpressionId() != null)
{
value = ValueUtils.getResult(wi);
log.debug("eval() found value as child result");
}
if (value == null)
{
try
{
value = ValueUtils.determineValue(this, wi);
}
catch (final ValueException e)
{
log.debug("eval() problem", e);
// value remains null
}
}
log.debug("eval() value is >"+value+"<");
try
{
ValueUtils.determineAndSetTarget
("", // 'field' or 'variable'
this,
wi,
value);
}
catch (final ValueException ve)
{
throw new ApplyException
("Failed to set value", ve);
}
return value;
}
}