cvs commit: jakarta-velocity/testbed TemplateNodeView.java

[jv...@locus.apache.org]

jvanzyl     00/09/21 16:40:53

  Added:       testbed  TemplateNodeView.java
  Log:
  - little util to dump the AST for a template now that visitors are
    no longer used for output.
  
  Revision  Changes    Path
  1.1                  jakarta-velocity/testbed/TemplateNodeView.java
  
  Index: TemplateNodeView.java
  ===================================================================
  /*
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2000 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", "Velocity", 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 apache@apache.org.
   *
   * 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/>.
   */
  
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.io.FileInputStream;
  
  import org.apache.velocity.processor.javacc.JavaCCProcessor;
  import org.apache.velocity.processor.javacc.parser.SimpleNode;
  import org.apache.velocity.processor.javacc.visitor.NodeViewMode;
  
  /**
   * Simple class for dumping the AST for a template.
   */
  public class TemplateNodeView
  {
      /** Template processor */
      private JavaCCProcessor processor;
      private SimpleNode document;
      private NodeViewMode visitor;
  
      // So now, after a template is constructed all the
      // initial processing is done.
  
      public TemplateNodeView(String template)
      {
          try
          {
              processor = new JavaCCProcessor();
              processor.init(null, "velocity");
              document = processor.parse(new FileInputStream(template));
              visitor = new NodeViewMode();
              visitor.setContext(null);
              visitor.setWriter(new PrintWriter(System.out));
              document.jjtAccept(visitor, null);
          }
          catch (Exception e)
          {
              System.out.println(e);
              e.printStackTrace();
          }
      }
  
      public static void main(String args[])
      {
          TemplateNodeView v = new TemplateNodeView(args[0]);
      }        
  }