1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Copyright 2005 The Apache Software Foundation.
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20 
  21 package com.sun.org.apache.xerces.internal.jaxp.validation;
  22 
  23 import com.sun.org.apache.xerces.internal.xni.grammars.Grammar;
  24 import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarDescription;
  25 import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarPool;
  26 
  27 /**
  28  * <p>Implementation of Schema for W3C XML Schemas
  29  * which contains no schema components.</p>
  30  *
  31  * @author Michael Glavassevich, IBM
  32  * @version $Id: EmptyXMLSchema.java,v 1.6 2010-11-01 04:40:08 joehw Exp $
  33  */
  34 final class EmptyXMLSchema extends AbstractXMLSchema implements XMLGrammarPool {
  35 
  36     /** Zero length grammar array. */
  37     private static final Grammar [] ZERO_LENGTH_GRAMMAR_ARRAY = new Grammar [0];
  38 
  39     public EmptyXMLSchema() {}
  40 
  41     /*
  42      * XMLGrammarPool methods
  43      */
  44 
  45     public Grammar[] retrieveInitialGrammarSet(String grammarType) {
  46         return ZERO_LENGTH_GRAMMAR_ARRAY;
  47     }
  48 
  49     public void cacheGrammars(String grammarType, Grammar[] grammars) {}
  50 
  51     public Grammar retrieveGrammar(XMLGrammarDescription desc) {
  52         return null;
  53     }
  54 
  55     public void lockPool() {}
  56 
  57     public void unlockPool() {}
  58 
  59     public void clear() {}
  60 
  61     /*
  62      * XSGrammarPoolContainer methods
  63      */
  64 
  65     public XMLGrammarPool getGrammarPool() {
  66         return this;
  67     }
  68 
  69     public boolean isFullyComposed() {
  70         return true;
  71     }
  72 
  73 } // EmptyXMLSchema