nl.tue.gale.ae.processor.xmlmodule.VariableModule.java Source code

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Here is the source code for nl.tue.gale.ae.processor.xmlmodule.VariableModule.java

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/*
    
   This file is part of GALE (Generic Adaptation Language and Engine).
    
GALE 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 3 of the License, or (at your option) 
any later version.
    
GALE 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 GALE. If not, see <http://www.gnu.org/licenses/>.
    
 */
/**
 * VariableModule.java
 * Last modified: $Date$
 * In revision:   $Revision$
 * Modified by:   $Author$
 *
 * Copyright (c) 2008-2011 Eindhoven University of Technology.
 * All Rights Reserved.
 *
 * This software is proprietary information of the Eindhoven University
 * of Technology. It may be used according to the GNU LGPL license.
 */
package nl.tue.gale.ae.processor.xmlmodule;

import java.util.Arrays;
import java.util.List;

import nl.tue.gale.ae.GaleContext;
import nl.tue.gale.ae.ProcessorException;
import nl.tue.gale.ae.Resource;
import nl.tue.gale.common.GaleUtil;
import nl.tue.gale.common.cache.CacheSession;
import nl.tue.gale.common.uri.URI;
import nl.tue.gale.um.data.EntityValue;

import org.dom4j.DocumentFactory;
import org.dom4j.Element;

public class VariableModule extends AbstractModule {
    private List<String> mimeToHandle = Arrays
            .asList(new String[] { "text/xhtml", "text/xml", "application/xml", "application/smil" });

    public List<String> getMimeToHandle() {
        return mimeToHandle;
    }

    public void setMimeToHandle(List<String> mimeToHandle) {
        this.mimeToHandle = mimeToHandle;
    }

    public Element traverse(Element element, Resource resource) throws ProcessorException {
        GaleContext gale = GaleContext.of(resource);
        if (element.attributeValue("name") != null) {
            String name = element.attributeValue("name");
            String text = null;
            CacheSession<EntityValue> session = gale.openUmSession();
            URI uri = session.resolve(name);
            text = gale.um().get(uri).getValueString();
            GaleUtil.replaceNode(element, DocumentFactory.getInstance().createText(text));
        } else if (element.attribute("expr") != null) {
            String expr = element.attributeValue("expr");
            GaleUtil.replaceNode(element, DocumentFactory.getInstance().createText(gale.eval(expr).toString()));
        }
        return null;
    }
}