initdefinitionstag.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * $Header: /sfroot/cvs/esimple/src/core/com/esimple/framework/web/taglib/tiles/InitDefinitionsTag.java,v 1.1.1.1 2004/09/08 06:38:26 lava Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/09/08 06:38:26 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Struts", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */


package com.esimple.framework.web.taglib.tiles;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.struts.tiles.DefinitionsFactory;
import org.apache.struts.tiles.DefinitionsFactoryConfig;
import org.apache.struts.tiles.DefinitionsFactoryException;
import org.apache.struts.tiles.TilesUtil;

  /**
   * Init definitions factory.
   */
public class InitDefinitionsTag extends TagSupport implements ComponentConstants {


  private String filename = null;
  private String classname = null;

  /**
   * Default constructor.
   */
  public InitDefinitionsTag() {
    super();
  }

    /**
     * Release all allocated resources.
     */
    public void release() {

        super.release();
        filename = null;
    }

    /**
     * Set file.
     */
  public void setFile(String name){
    this.filename = name;
  }

    /**
     * Set classname.
     */
  public void setClassname(String classname){
    this.classname = classname;
  }

    /**
     * Do start tag.
     */
  public int doStartTag() throws JspException
  {
  DefinitionsFactory factory = TilesUtil.getDefinitionsFactory(pageContext.getRequest(),pageContext.getServletContext());
  if(factory != null )
    return SKIP_BODY;

  DefinitionsFactoryConfig factoryConfig = new DefinitionsFactoryConfig();
  factoryConfig.setFactoryClassname( classname );
  factoryConfig.setDefinitionConfigFiles( filename );

  try
    {
    factory = TilesUtil.createDefinitionsFactory(pageContext.getServletContext(), factoryConfig);
    }
   catch( DefinitionsFactoryException ex )
      {
      ex.printStackTrace();
      throw new JspException( ex.getMessage() + " See console for details" );
      }
  return SKIP_BODY;
  }

    /**
     * Do end tag.
     */
  public int doEndTag() throws JspException {
    return EVAL_PAGE;
  }

}