/*

  * $Id: WildcardDefinitionPatternMatcher.java 795343 2009-07-18 11:26:09Z apetrelli $

  *

  * 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.

  */

 package org.apache.tiles.definition.pattern.wildcard;

 import java.util.List;

 import org.apache.tiles.Definition;

 import org.apache.tiles.definition.pattern.DefinitionPatternMatcher;

 import org.apache.tiles.definition.pattern.PatternUtil;

 import org.apache.tiles.util.WildcardHelper;

 /**

  * Matches wildcard patterns in definitions.

  *

  * @version $Rev: 795343 $ $Date: 2009-07-18 21:26:09 +1000 (Sat, 18 Jul 2009) $

  * @since 2.2.0

  */

 public class WildcardDefinitionPatternMatcher implements

         DefinitionPatternMatcher {

     /**

      * Allows to parse wildcard expressions and to recognize substitution

      * variables.

      */

     private WildcardHelper wildcardHelper;

     /**

      * The definition to use as a basis.

      */

     private Definition definition;

     /**

      * The pattern to use.

      */

     private int[] pattern;

     /**

      * Constructor.

      *

      * @param pattern The pattern to use, in string form.

      * @param definition The definition to use as a basis.

      * @param wildcardHelper The object that parses wildcard expressions and

      * recognized substitution variables.

      * @since 2.2.0

      */

     public WildcardDefinitionPatternMatcher(String pattern,

             Definition definition, WildcardHelper wildcardHelper) {

         this.wildcardHelper = wildcardHelper;

         this.definition = definition;

         this.pattern = wildcardHelper.compilePattern(pattern);

     }

     /** {@inheritDoc} */

     public Definition createDefinition(String definitionName) {

         List<String> vars = wildcardHelper.match(definitionName, pattern);

         Definition d = null;

         if (vars != null) {

             d = PatternUtil.replacePlaceholders(definition, definitionName,

                     vars.toArray());

         }

         return d;

     }

 }