/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2001-04 The eXist Project
 *  http://exist-db.org
 *  
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *  
 *  $Id$
 */
package org.exist.xquery;

import org.exist.memtree.MemTreeBuilder;
import org.exist.memtree.NodeImpl;
import org.exist.xquery.util.ExpressionDumper;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.Sequence;

/**
 * Constructs an in-memory CDATA node.
 * 
 * @author wolf
 */
public class CDATAConstructor extends NodeConstructor {

    private final String cdata;
    
    /**
     * @param context
     */
    public CDATAConstructor(XQueryContext context, String content) {
        super(context);
        this.cdata = content;
    }

    /* (non-Javadoc)
     * @see org.exist.xquery.Expression#eval(org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
     */
    public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
        if (context.getProfiler().isEnabled()) {
            context.getProfiler().start(this);       
            context.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
            if (contextSequence != null)
                context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
            if (contextItem != null)
                context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
        }

        if (newDocumentContext)
            context.pushDocumentContext();
        try {
            MemTreeBuilder builder = context.getDocumentBuilder();
            int nodeNr = builder.cdataSection(cdata);
            NodeImpl node = builder.getDocument().getNode(nodeNr);

            if (context.getProfiler().isEnabled())
                context.getProfiler().end(this, "", node);

            return node;
        } finally {
            if (newDocumentContext)
                context.popDocumentContext();
        }
    }

    /* (non-Javadoc)
     * @see org.exist.xquery.Expression#analyze(org.exist.xquery.Expression, int)
     */
    public void analyze(AnalyzeContextInfo contextInfo) throws XPathException {
        super.analyze(contextInfo);
    }

    /* (non-Javadoc)
     * @see org.exist.xquery.Expression#dump(org.exist.xquery.util.ExpressionDumper)
     */
    public void dump(ExpressionDumper dumper) {
        dumper.display("<![CDATA[").display(cdata).display("]]>");
    }
    
    public String toString() {
        return "<![CDATA[" + cdata.toString() + "]]>";
    }
    
}