aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.messaging.saaj.util;
aoqi@0: 
aoqi@0: 
aoqi@0: import org.xml.sax.SAXException;
aoqi@0: import java.util.concurrent.ArrayBlockingQueue;
aoqi@0: import java.util.concurrent.BlockingQueue;
aoqi@0: import javax.xml.parsers.ParserConfigurationException;
aoqi@0: import javax.xml.parsers.SAXParser;
aoqi@0: import javax.xml.parsers.SAXParserFactory;
aoqi@0: import org.xml.sax.SAXNotRecognizedException;
aoqi@0: import org.xml.sax.SAXNotSupportedException;
aoqi@0: 
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Pool of SAXParser objects
aoqi@0:  */
aoqi@0: public class ParserPool {
aoqi@0:     private final BlockingQueue queue;
aoqi@0:     private SAXParserFactory factory;
aoqi@0:     private int capacity;
aoqi@0: 
aoqi@0:     public ParserPool(int capacity) {
aoqi@0:         this.capacity = capacity;
aoqi@0:         queue = new ArrayBlockingQueue(capacity);
aoqi@0:         //factory = SAXParserFactory.newInstance();
aoqi@0:         factory = new com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl();
aoqi@0:         factory.setNamespaceAware(true);
aoqi@0:         for (int i=0; i < capacity; i++) {
aoqi@0:            try {
aoqi@0:                 queue.put(factory.newSAXParser());
aoqi@0:             } catch (InterruptedException ex) {
aoqi@0:                 Thread.currentThread().interrupt();
aoqi@0:                 throw new RuntimeException(ex);
aoqi@0:             } catch (ParserConfigurationException ex) {
aoqi@0:                 throw new RuntimeException(ex);
aoqi@0:             } catch (SAXException ex) {
aoqi@0:                 throw new RuntimeException(ex);
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public SAXParser get() throws ParserConfigurationException,
aoqi@0:                 SAXException {
aoqi@0: 
aoqi@0:         try {
aoqi@0:             return (SAXParser) queue.take();
aoqi@0:         } catch (InterruptedException ex) {
aoqi@0:             throw new SAXException(ex);
aoqi@0:         }
aoqi@0: 
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void put(SAXParser parser) {
aoqi@0:         queue.offer(parser);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void returnParser(SAXParser saxParser) {
aoqi@0:         saxParser.reset();
aoqi@0:         resetSaxParser(saxParser);
aoqi@0:         put(saxParser);
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * SAAJ Issue 46 :https://saaj.dev.java.net/issues/show_bug.cgi?id=46
aoqi@0:      * Xerces does not provide a way to reset the SymbolTable
aoqi@0:      * So we are trying to reset it using the proprietary code below.
aoqi@0:      * Temporary Until the bug : https://jaxp.dev.java.net/issues/show_bug.cgi?id=59
aoqi@0:      * is fixed.
aoqi@0:      * @param parser the parser from the pool whose Symbol Table needs to be reset.
aoqi@0:      */
aoqi@0:      private void resetSaxParser(SAXParser parser) {
aoqi@0:         try {
aoqi@0:             //Object obj = parser.getProperty("http://apache.org/xml/properties/internal/symbol-table");
aoqi@0:             com.sun.org.apache.xerces.internal.util.SymbolTable table = new com.sun.org.apache.xerces.internal.util.SymbolTable();
aoqi@0:             parser.setProperty("http://apache.org/xml/properties/internal/symbol-table", table);
aoqi@0:             //obj = parser.getProperty("http://apache.org/xml/properties/internal/symbol-table");
aoqi@0:         } catch (SAXNotRecognizedException ex) {
aoqi@0:             //nothing to do
aoqi@0:         } catch (SAXNotSupportedException ex) {
aoqi@0:             //nothing to do
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: }