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    1   /*
    2    * Copyright (c) 2003 The Visigoth Software Society. All rights
    3    * reserved.
    4    *
    5    * Redistribution and use in source and binary forms, with or without
    6    * modification, are permitted provided that the following conditions
    7    * are met:
    8    *
    9    * 1. Redistributions of source code must retain the above copyright
   10    *    notice, this list of conditions and the following disclaimer.
   11    *
   12    * 2. Redistributions in binary form must reproduce the above copyright
   13    *    notice, this list of conditions and the following disclaimer in
   14    *    the documentation and/or other materials provided with the
   15    *    distribution.
   16    *
   17    * 3. The end-user documentation included with the redistribution, if
   18    *    any, must include the following acknowledgement:
   19    *       "This product includes software developed by the
   20    *        Visigoth Software Society (http://www.visigoths.org/)."
   21    *    Alternately, this acknowledgement may appear in the software itself,
   22    *    if and wherever such third-party acknowledgements normally appear.
   23    *
   24    * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the 
   25    *    project contributors may be used to endorse or promote products derived
   26    *    from this software without prior written permission. For written
   27    *    permission, please contact visigoths@visigoths.org.
   28    *
   29    * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
   30    *    nor may "FreeMarker" or "Visigoth" appear in their names
   31    *    without prior written permission of the Visigoth Software Society.
   32    *
   33    * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   34    * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   35    * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   36    * DISCLAIMED.  IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
   37    * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   38    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   39    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   40    * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   41    * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   42    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   43    * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   44    * SUCH DAMAGE.
   45    * ====================================================================
   46    *
   47    * This software consists of voluntary contributions made by many
   48    * individuals on behalf of the Visigoth Software Society. For more
   49    * information on the Visigoth Software Society, please see
   50    * http://www.visigoths.org/
   51    */
   52   
   53   package freemarker.core;
   54   
   55   import java.util;
   56   import java.io.IOException;
   57   import freemarker.template.TemplateException;
   58   
   59   /**
   60    * Encapsulates an array of <tt>TemplateElement</tt> objects. 
   61    */
   62   final class MixedContent extends TemplateElement {
   63   
   64       MixedContent()
   65       {
   66           nestedElements = new ArrayList();
   67       }
   68   
   69       void addElement(TemplateElement element) {
   70           nestedElements.add(element);
   71       }
   72   
   73       TemplateElement postParseCleanup(boolean stripWhitespace)
   74           throws ParseException 
   75       {
   76           super.postParseCleanup(stripWhitespace);
   77           if (nestedElements.size() == 1) {
   78               return (TemplateElement) nestedElements.get(0);
   79           }
   80           return this;
   81       }
   82   
   83       /**
   84        * Processes the contents of the internal <tt>TemplateElement</tt> list,
   85        * and outputs the resulting text.
   86        */
   87       void accept(Environment env) 
   88           throws TemplateException, IOException 
   89       {
   90           for (int i=0; i<nestedElements.size(); i++) {
   91               TemplateElement element = (TemplateElement) nestedElements.get(i);
   92               env.visit(element);
   93           }
   94       }
   95   
   96       public String getCanonicalForm() {
   97           StringBuffer buf = new StringBuffer();
   98           for (int i = 0; i<nestedElements.size(); i++) {
   99               TemplateElement element = (TemplateElement) nestedElements.get(i);
  100               buf.append(element.getCanonicalForm());
  101           }
  102           return buf.toString();
  103       }
  104   
  105       public String getDescription() {
  106           if (parent == null) {
  107               return "root element";
  108           }
  109           return "content"; // MixedContent is uninteresting in a stack trace.
  110       }
  111   
  112       boolean isIgnorable() {
  113           return nestedElements == null || nestedElements.size() == 0;
  114       }
  115   }

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