ForEach.java

/**
 * $Id: $
 * $Date: $
 *
 */

package org.xmlsh.xproc.compiler;

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import net.sf.saxon.s9api.Axis;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.XdmItem;
import net.sf.saxon.s9api.XdmNode;
import net.sf.saxon.s9api.XdmNodeKind;
import net.sf.saxon.s9api.XdmSequenceIterator;
/*
<p:for-each
name? = NCName>
  ((p:iteration-source? &
    (p:output |
     p:log)*),
   subpipeline)
</p:for-each>
*/

class ForEach extends AbstractStep {
	
	
	static class ForEachOption extends OutputOrLog
	{
		IterationSource	iteration_source;

		ForEachOption(IterationSource iteration_source, Output output, Log log) {
			super( output , log );
			this.iteration_source = iteration_source;

		}

	}
	
	List<ForEachOption>	foreach_options = new ArrayList<ForEachOption>();
	SubPipeline 		subpipeline 	= new SubPipeline();

	static ForEach create(XdmNode node){
		ForEach step = new ForEach();
		step.parse(node);
		return step;
	}

	protected void parse(XdmNode node) {
		super.parse(node);
		
		parseChildren(node);
		
	}

	private void parseChildren(XdmNode parent) {
		IterationSource	iteration_source = null;
		Output			output = null;
		Log				log = null ;
		
		XdmSequenceIterator children = parent.axisIterator(Axis.CHILD);
		while( children.hasNext() ){
			XdmItem item=children.next();
			if( item instanceof XdmNode ){
				XdmNode child = (XdmNode) item ;
				QName name = child.getNodeName();
				if( child.getNodeKind() != XdmNodeKind.ELEMENT )
					continue ;
				
				if( name.equals(Names.kITERATION_SOURCE))
					iteration_source = IterationSource.create(child);
				else
				if( name.equals(Names.kOUTPUT))
					output = Output.create(child);
				else
				if( name.equals(Names.kLOG))
					log = Log.create(child);
				
				if( iteration_source != null && (output != null || log != null )){
					
					foreach_options.add( new ForEachOption(iteration_source,output,log));
					iteration_source = null;
					output = null;
					log = null;
					continue ;
				}
				
				// Sub pipeline 
				subpipeline.parse(child);
			}
		}
	}

	@Override
	void serialize(OutputContext c ) {
		// TODO Auto-generated method stub
		
	}

}



//
//
//Copyright (C) 2008,2009 , David A. Lee.
//
//The contents of this file are subject to the "Simplified BSD License" (the "License");
//you may not use this file except in compliance with the License. You may obtain a copy of the
//License at http://www.opensource.org/licenses/bsd-license.php 
//
//Software distributed under the License is distributed on an "AS IS" basis,
//WITHOUT WARRANTY OF ANY KIND, either express or implied.
//See the License for the specific language governing rights and limitations under the License.
//
//The Original Code is: all this file.
//
//The Initial Developer of the Original Code is David A. Lee
//
//Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
//Contributor(s): none.
//