src.openwfe.org.engine.expressions.xeme.NthExpression Maven / Gradle / Ivy
/*
* Copyright (c) 2005-2006, 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: NthExpression.java 2670 2006-05-26 19:06:15Z jmettraux $
*/
//
// NthExpression.java
//
// [email protected]
//
// generated with
// jtmpl 1.1.01 2004/05/19 ([email protected])
//
package openwfe.org.engine.expressions.xeme;
import openwfe.org.xml.XmlUtils;
import openwfe.org.engine.workitem.Attribute;
import openwfe.org.engine.workitem.XmlAttribute;
import openwfe.org.engine.workitem.StringAttribute;
import openwfe.org.engine.workitem.InFlowWorkItem;
import openwfe.org.engine.workitem.AttributeUtils;
import openwfe.org.engine.expressions.ValueUtils;
import openwfe.org.engine.expressions.ApplyException;
import openwfe.org.engine.expressions.ReplyException;
import openwfe.org.engine.expressions.FlowExpressionId;
import openwfe.org.engine.expressions.CleanCompositeFlowExpression;
/**
* car/cdr implementation.
*
* CVS Info :
*
$Author: jmettraux $
*
$Id: NthExpression.java 2670 2006-05-26 19:06:15Z jmettraux $
*
* @author [email protected]
*/
public class NthExpression
extends NChildrenExpression
{
/*
private final static org.apache.log4j.Logger log = org.apache.log4j.Logger
.getLogger(NthExpression.class.getName());
*/
//
// CONSTANTS & co
//
// FIELDS
//
// CONSTRUCTORS
//
// BEAN METHODS
//
// METHODS from FlowExpression
//
// METHODS from NChildrenExpression
/**
* Extending non abstract class tell by the means of this method
* how many children they need to execute.
*/
public int childrenCount ()
{
return 2;
}
/**
* This method does the job of turning the children results into the
* result of the expression itself.
*/
public org.jdom.Content determineResult ()
{
final Attribute a0 = (Attribute)getResults().get(0);
final Attribute a1 = (Attribute)getResults().get(1);
final int index = AttributeUtils.toInt(this.context(), a0);
final org.jdom.Content c = XemeUtils.toXemeResult(this, a1);
//log.debug
// ("determineResult nth ("+index+") of "+XmlUtils.xmlToString(c));
return XemeUtils.nth(index, c);
}
//
// METHODS
//
// STATIC METHODS
}