2009/05/20 - Apache Shale has been retired.

 /*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to you under the Apache License, Version 2.0

  * (the "License"); you may not use this file except in compliance with

  * the License.  You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 /*

  * $Id: DefaultBuilderRule.java 464373 2006-10-16 04:21:54Z rahul $

  */

 package org.apache.shale.clay.parser.builder.chain;

 import org.apache.commons.chain.Command;

 import org.apache.commons.chain.Context;

 import org.apache.shale.clay.parser.Node;

 import org.apache.shale.clay.parser.builder.Builder;

 import org.apache.shale.clay.parser.builder.CommentBuilder;

 import org.apache.shale.clay.parser.builder.MorphBuilder;

 import org.apache.shale.clay.parser.builder.VerbatimBuilder;

 /**

  * <p>

  * This is a <code>Command</code> implementation that will

  * match a HTML {@link Node} with a matching {@link Builder}

  * implementation. This is the default rule and will always return a

  * {@link OutputLinkBuilder} and the chain terminated.  The {@link BuilderFactory} runs this

  * command rule as part of the <code>Globals.BUILDER_CATALOG_NAME</code>

  * found in the <code>Globals.BUILDER_RESOURCE_NAME</code> and

  * invoking the <code>Globals.FIND_BUILDER_COMMAND_NAME</code>

  * </p>

  */

 public class DefaultBuilderRule implements Command {

     /**

      * <p>

      * Default static instance of {@link VerbatimBuilder}.

      * <p>

      */

     private static final Builder[] BUILDERS = {new CommentBuilder(), new MorphBuilder(), new VerbatimBuilder()};

     /**

      * <p>

      * Uses the {@link BuilderRuleContext} to find the current html

      * {@link org.apache.shale.clay.parser.Node}. This is the default rule that

      * will return a {@link VerbatimBuilder} when the node is not a comment or

      * has a <code>jsfid</code> attribute. When the html node is a

      * comment, the {@link CommentBuilder} is returned.  If the node is not a comment

      * but has a <code>jsfid</code> attribute, the {@link MorphBuilder} is returned.

      * </p>

      *

      * @param context commons chians

      * @return <code>true</code> if final

      * @exception Exception propagated to the top chain

      */

     public boolean execute(Context context) throws Exception {

         BuilderRuleContext builderRuleContext = (BuilderRuleContext) context;

         Node node = builderRuleContext.getNode();

         if (node.isComment() || node.isCdata()) {

             builderRuleContext.setBuilder(BUILDERS[0]);

         } else  if (node.getName() != null && node.getAttributes().containsKey("jsfid")) {

             builderRuleContext.setBuilder(BUILDERS[1]);

         } else {

             builderRuleContext.setBuilder(BUILDERS[2]);

         }

         return true;

     }

 }