cvs commit: jakarta-taglibs/scopes/src/org/apache/taglibs/scopes ParameterTag.java

[morgand]

morgand     01/03/06 17:54:38

  Added:       scopes/src/org/apache/taglibs/scopes ParameterTag.java
  Log:
  new provisional taglib "scopes"
  
  Revision  Changes    Path
  1.1                  
jakarta-taglibs/scopes/src/org/apache/taglibs/scopes/ParameterTag.java
  
  Index: ParameterTag.java
  ===================================================================
  /*
   * $Header: 
/home/cvs/jakarta-taglibs/scopes/src/org/apache/taglibs/scopes/ParameterTag.java,v 1.1 
2001/03/07 01:54:38 morgand Exp $
   * $Revision: 1.1 $
   * $Date: 2001/03/07 01:54:38 $
   *
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999 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", "Tomcat", 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 [EMAIL PROTECTED]
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * 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 THE APACHE SOFTWARE FOUNDATION 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.
   * ====================================================================
   *
   * 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 org.apache.taglibs.scopes;
  
  import java.util.*;
  import javax.servlet.*;
  import javax.servlet.http.*;
  import javax.servlet.jsp.*;
  import javax.servlet.jsp.tagext.*;
  
  /**
   * JSP Tag <b>parameter</b>, used to output the value for a single
   * HttpServletRequest parameter named with <b>_name</b>.
   * <p>
   * JSP Tag Lib Descriptor
   * <p><pre>
   * &lt;_name&gt;parameter&lt;/_name&gt;
   * &lt;tagclass&gt;org.apache.taglibs.request.ParameterTag&lt;/tagclass&gt;
   * &lt;bodycontent&gt;empty&lt;/bodycontent&gt;
   * &lt;info&gt;Used to output the value of a single parameter.&lt;/info&gt;
   *   &lt;attribute&gt;
   *     &lt;_name&gt;_name&lt;/_name&gt;
   *     &lt;required&gt;true&lt;/required&gt;
   *     &lt;rtexprvalue&gt;false&lt;/rtexprvalue&gt;
   *   &lt;/attribute&gt;
   * </pre>
   *
   * @author Glenn Nielsen
   */
  
  public class ParameterTag extends TagSupport {
    // Required attribute, _name of HTTP input parameter to get
    private String _name = null;
  
    /**
     * Method called at end of Tag to output parameter value
     *
     * @return EVAL_PAGE
     */
    public final int doEndTag() throws JspException
    {
      String value =
      ((HttpServletRequest)pageContext.getRequest()).getParameter(_name);
      if ( value == null )
        value = "";
  
      try {
        pageContext.getOut().write("" + value);
      } catch (Exception e) {
        throw new JspException("IO Error: " + e.getMessage());
      }
  
      return EVAL_PAGE;
    }
  
    /**
     * Set the required tag attribute <b>_name</b>.
     *
     * @param String _name of HTTP input parameter
     */
    public final void setName(String str)
    {
      _name = str;
    }
  
  }