content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2005 The Apache Software Foundation.
   *
   * Licensed 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 jaxp.sun.org.apache.xerces.internal.jaxp.validation;
  
  import java.lang.ref.WeakReference;
  
  import jaxp.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarPool;
  
  /**
   * <p>An implementation of Schema for W3C XML Schemas
   * that keeps a weak reference to its grammar pool. If
   * no validators currently have a reference to the
   * grammar pool, the garbage collector is free to reclaim
   * its memory.</p>
   *
   * @author Michael Glavassevich, IBM
   */
  final class WeakReferenceXMLSchema extends AbstractXMLSchema {
  
      /** Weak reference to grammar pool. */
      private WeakReference fGrammarPool = new WeakReference(null);
  
      public WeakReferenceXMLSchema() {}
  
      /*
       * XSGrammarPoolContainer methods
       */
  
      public synchronized XMLGrammarPool getGrammarPool() {
          XMLGrammarPool grammarPool = (XMLGrammarPool) fGrammarPool.get();
          // If there's no grammar pool then either we haven't created one
          // yet or the garbage collector has already cleaned out the previous one.
          if (grammarPool == null) {
              grammarPool = new SoftReferenceGrammarPool();
              fGrammarPool = new WeakReference(grammarPool);
          }
          return grammarPool;
      }
  
      public boolean isFullyComposed() {
          return false;
      }
  
  } // WeakReferenceXMLSchema
  