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jpivot-wcf code used by the ART reporting tool

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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 net.sf.wcfart.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 Commons Digester.
 * @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();
  }

}