cvs commit: jakarta-taglibs/jdbc/src/org/apache/taglibs/jdbc/connection JndiNameTag.java

[glenn]

glenn       01/03/04 10:57:56

  Added:       jdbc/src/org/apache/taglibs/jdbc/connection JndiNameTag.java
  Log:
  Add support for JNDI named JDBC DataSource, contributed by Rich Catlett.
  
  Revision  Changes    Path
  1.1                  
jakarta-taglibs/jdbc/src/org/apache/taglibs/jdbc/connection/JndiNameTag.java
  
  Index: JndiNameTag.java
  ===================================================================
  /*
   *
   * ====================================================================
   *
   * 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.jdbc.connection;
  
  import javax.servlet.jsp.JspTagException;
  import javax.servlet.jsp.tagext.BodyTagSupport;
  
  /**
   * <p>JSP tag jndiname, sets the jndi named javax.sql.DataSource for the
   * enclosing connection tag.  The jndiname is read from the indicated
   * initParameter, if the parameter is set, or from the body of the tag
   * if it is not.</p>
   * 
   * <p>JSP Tag Lib Descriptor
   * <pre>
   * &lt;name>jndiname&lt;/name>
   * &lt;tagclass>org.apache.taglibs.jdbc.connection.JndiNameTag&lt;/tagclass>
   * &lt;bodycontent>JSP&lt;/bodycontent>
   * &lt;info>Sets the jndi named javax.sql.DataSource for the enclosing
   * connection tag according to the initParameter, if specified, or the
   * body of the tag.  The tag body will be trimmed.&lt;/info>
   *   &lt;attribute>
   *     &lt;name>initParameter&lt;/name>
   *     &lt;required>false&lt;/required>
   *     &lt;rtexprvalue>false&lt;/rtexprvalue>
   *   &lt;/attribute>
   * </pre>
   * 
   * @author Rich Catlett
   * @See ConnectionTag
   */
  public class JndiNameTag extends BodyTagSupport {
    
    private String _jndiName = null;
  
    /**
     * The name of the init parameter containing the jndinameed DataSource.
     * 
     * @param paramName jndiname for Datasource
     */
    public void setInitParameter(String paramName) {
      _jndiName = pageContext.getServletContext().getInitParameter(paramName);
    }
  
    public int doEndTag() throws JspTagException{
      try { 
        ConnectionTag connTag = 
          (ConnectionTag) findAncestorWithClass(this, 
Class.forName("org.apache.taglibs.jdbc.connection.ConnectionTag"));
        if (_jndiName == null) {
          _jndiName = getBodyContent().getString().trim();
        }
  
        connTag.setjndiName(_jndiName); 
      } 
       catch (ClassNotFoundException e) {
        throw new JspTagException(e.toString());
      }
      return EVAL_PAGE;
    }
  
    public void release() {
      _jndiName = null;
    }
    
  }