com.tonbeller.wcf.utils.ObjectFactory.java Source code

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Here is the source code for com.tonbeller.wcf.utils.ObjectFactory.java

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/*
 * ====================================================================
 * This software is subject to the terms of the Common Public License
 * Agreement, available at the following URL:
 *   http://www.opensource.org/licenses/cpl.html .
 * Copyright (C) 2003-2004 TONBELLER AG.
 * All Rights Reserved.
 * You must accept the terms of that agreement to use this software.
 * ====================================================================
 *
 * 
 */
package com.tonbeller.wcf.utils;

import java.io.IOException;
import java.net.URL;

import org.apache.commons.digester.Digester;
import org.apache.commons.digester.xmlrules.DigesterLoader;
import org.xml.sax.SAXException;

/**
 * Creates Object instances via Digester xml rules. For more info
 * see <a href="http://jakarta.apache.org/commons/digester.html">Commons Digester</a>.
 * @author av
 */
public class ObjectFactory {

    /**
     * not for external use. Has to be public for the commons digester
     * to access it.
     */
    public static class ObjectHolder {
        private Object object;

        public void setObject(Object object) {
            this.object = object;
        }

        public Object getObject() {
            return object;
        }
    }

    private ObjectFactory() {
    }

    public static Object instance(URL rulesXml, URL configXml) throws SAXException, IOException {

        Digester digester = DigesterLoader.createDigester(rulesXml);
        digester.setValidating(false);

        ObjectHolder root = new ObjectHolder();
        digester.push(root);

        digester.parse(configXml.openStream());
        return root.getObject();
    }

}