content: /*
   * 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 mf.org.apache.xerces.jaxp.validation;
  
  import mf.org.apache.xerces.xni.grammars.Grammar;
  import mf.org.apache.xerces.xni.grammars.XMLGrammarDescription;
  import mf.org.apache.xerces.xni.grammars.XMLGrammarPool;
  
  /**
   * <p>Filter {@link XMLGrammarPool} that exposes a
   * read-only view of the underlying pool.</p>
   *
   * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
   * @version $Id: ReadOnlyGrammarPool.java 447235 2006-09-18 05:01:44Z mrglavas $
   */
  final class ReadOnlyGrammarPool implements XMLGrammarPool {
  
      private final XMLGrammarPool core;
  
      public ReadOnlyGrammarPool(XMLGrammarPool pool) {
          this.core = pool;
      }
  
      @Override
      public void cacheGrammars(String grammarType, Grammar[] grammars) {
          // noop. don't let caching to happen
      }
  
      @Override
      public void clear() {
          // noop. cache is read-only.
      }
  
      @Override
      public void lockPool() {
          // noop. this pool is always read-only
      }
  
      @Override
      public Grammar retrieveGrammar(XMLGrammarDescription desc) {
          return core.retrieveGrammar(desc);
      }
  
      @Override
      public Grammar[] retrieveInitialGrammarSet(String grammarType) {
          return core.retrieveInitialGrammarSet(grammarType);
      }
  
      @Override
      public void unlockPool() {
          // noop. this pool is always read-only.
      }
  
  } // ReadOnlyGrammarPool
  