paramtag.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 110 行

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2004 Caucho Technology, Inc.  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
 *        Caucho Technology (http://www.caucho.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Hessian", "Resin", and "Caucho" 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 "Resin"
 *    nor may "Resin" appear in their names without prior written
 *    permission of Caucho Technology.
 *
 * 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
 * DISCLAIMED.  IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND 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.
 *
 * @author Sam
 */


package com.caucho.portal.generic.taglib;

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

/**
 * A parameter for {@link RenderUrlTag} or {@link ActionUrlTag}.
 */
public class ParamTag extends TagSupport {
  private String _name;
  private String _value;
  private String _namespace;

  /**
   * The parameter name, required.
   */
  public void setName(String name)
  {
    _name = name;
  }

  /**
   * The parameter value, required.
   */
  public void setValue(String value)
  {
    _value = value;
  }

  /**
   * The namespace, optional.
   */
  public void setNamespace(String namespace)
  {
    _namespace = namespace;
  }

  /**
   * Process the tag.
   */
  public int doEndTag()
    throws JspException
  {
    Object parent = getParent();

    if (! (parent instanceof AbstractUrlTag))
      throw new JspException("portlet:param requires portlet:renderUrl or portlet:actionUrl parent."); 

    AbstractUrlTag urlTag = (AbstractUrlTag) parent;

    if (_namespace == null) {
      urlTag.addParam(_name, _value);
    }
    else {
      urlTag.addParam(_namespace, _name, _value);
    }
    
    return EVAL_PAGE;
  }
}