| /* |
| * 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 com.sun.org.apache.xerces.internal.jaxp.validation; |
| |
| import java.lang.ref.WeakReference; |
| |
| import com.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 |