geirm       2003/10/23 06:27:35

  Added:       src/java/org/apache/velocity/runtime/parser/node ASTMap.java
  Log:
  Tweaked patch from James Taylor for VTL Map creation support.  Thanks
  James!
  
  Revision  Changes    Path
  1.1                  
jakarta-velocity/src/java/org/apache/velocity/runtime/parser/node/ASTMap.java
  
  Index: ASTMap.java
  ===================================================================
  /*
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 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 [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.velocity.runtime.parser.node;
  
  import org.apache.velocity.context.InternalContextAdapter;
  import org.apache.velocity.runtime.parser.Parser;
  
  import org.apache.velocity.exception.MethodInvocationException;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * AST Node for creating a map / dictionary.
   *
   * This class was originally generated from Parset.jjt.
   *
   * @author <a href="mailto:[EMAIL PROTECTED]">James Taylor</a>
   * @version $Id: ASTMap.java,v 1.1 2003/10/23 13:27:35 geirm Exp $
   */
  public class ASTMap extends SimpleNode
  {
      public ASTMap(int id)
      {
          super(id);
      }
  
      public ASTMap(Parser p, int id)
      {
          super(p, id);
      }
  
      /** 
       * Accept the visitor. 
       */
      public Object jjtAccept(ParserVisitor visitor, Object data)
      {
          return visitor.visit(this, data);
      }
  
      /**
       * Evaluate the node.
       */
      public Object value(InternalContextAdapter context)
          throws MethodInvocationException
      {
          int size = jjtGetNumChildren();
  
          Map objectMap = new HashMap();
          
          for (int i = 0; i < size; i += 2)
          {
              SimpleNode keyNode = (SimpleNode) jjtGetChild(i);
              SimpleNode valueNode = (SimpleNode) jjtGetChild(i+1);
  
              Object key = (keyNode == null ? null : keyNode.value(context));
              Object value = (valueNode == null ? null : valueNode.value(context));
  
              objectMap.put(key, value);
          }
          
          return objectMap;
      }
  }
  
  
  

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