1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.xerces.internal.jaxp.validation;
  23 
  24 import com.sun.org.apache.xerces.internal.xni.grammars.Grammar;
  25 import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarDescription;
  26 import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarPool;
  27 
  28 /**
  29  * <p>Filter {@link XMLGrammarPool} that exposes a
  30  * read-only view of the underlying pool.</p>
  31  *
  32  * @author Kohsuke Kawaguchi
  33  */
  34 final class ReadOnlyGrammarPool implements XMLGrammarPool {
  35 
  36     private final XMLGrammarPool core;
  37 
  38     public ReadOnlyGrammarPool( XMLGrammarPool pool ) {
  39         this.core = pool;
  40     }
  41 
  42     public void cacheGrammars(String grammarType, Grammar[] grammars) {
  43         // noop. don't let caching to happen
  44     }
  45 
  46     public void clear() {
  47         // noop. cache is read-only.
  48     }
  49 
  50     public void lockPool() {
  51         // noop. this pool is always read-only
  52     }
  53 
  54     public Grammar retrieveGrammar(XMLGrammarDescription desc) {
  55         return core.retrieveGrammar(desc);
  56     }
  57 
  58     public Grammar[] retrieveInitialGrammarSet(String grammarType) {
  59         return core.retrieveInitialGrammarSet(grammarType);
  60     }
  61 
  62     public void unlockPool() {
  63         // noop. this pool is always read-only.
  64     }
  65 
  66 } // ReadOnlyGrammarPool