1 /*

     2  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package com.sun.xml.internal.messaging.saaj.util;

    27 

    28 

    29 import org.xml.sax.SAXException;

    30 import java.util.concurrent.ArrayBlockingQueue;

    31 import java.util.concurrent.BlockingQueue;

    32 import javax.xml.parsers.ParserConfigurationException;

    33 import javax.xml.parsers.SAXParser;

    34 import javax.xml.parsers.SAXParserFactory;

    35 import org.xml.sax.SAXNotRecognizedException;

    36 import org.xml.sax.SAXNotSupportedException;

    37 

    38 

    39 /**

    40  * Pool of SAXParser objects

    41  */

    42 public class ParserPool {

    43     private final BlockingQueue<SAXParser> queue;

    44     private SAXParserFactory factory;

    45 

    46     public ParserPool(int capacity) {

    47         queue = new ArrayBlockingQueue<SAXParser>(capacity);

    48         //factory = SAXParserFactory.newInstance();

    49         factory = new com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl();

    50         factory.setNamespaceAware(true);

    51         for (int i = 0; i < capacity; i++) {

    52            try {

    53                 queue.put(factory.newSAXParser());

    54             } catch (InterruptedException ex) {

    55                 Thread.currentThread().interrupt();

    56                 throw new RuntimeException(ex);

    57             } catch (ParserConfigurationException ex) {

    58                 throw new RuntimeException(ex);

    59             } catch (SAXException ex) {

    60                 throw new RuntimeException(ex);

    61             }

    62         }

    63     }

    64 

    65     public SAXParser get() throws ParserConfigurationException,

    66                 SAXException {

    67 

    68         try {

    69             return (SAXParser) queue.take();

    70         } catch (InterruptedException ex) {

    71             throw new SAXException(ex);

    72         }

    73 

    74     }

    75 

    76     public boolean put(SAXParser parser) {

    77         return queue.offer(parser);

    78     }

    79 

    80     public void returnParser(SAXParser saxParser) {

    81         saxParser.reset();

    82         resetSaxParser(saxParser);

    83         put(saxParser);

    84     }

    85 

    86 

    87     /**

    88      * SAAJ Issue 46 :https://saaj.dev.java.net/issues/show_bug.cgi?id=46

    89      * Xerces does not provide a way to reset the SymbolTable

    90      * So we are trying to reset it using the proprietary code below.

    91      * Temporary Until the bug : https://jaxp.dev.java.net/issues/show_bug.cgi?id=59

    92      * is fixed.

    93      * @param parser the parser from the pool whose Symbol Table needs to be reset.

    94      */

    95      private void resetSaxParser(SAXParser parser) {

    96         try {

    97             //Object obj = parser.getProperty("http://apache.org/xml/properties/internal/symbol-table");

    98             com.sun.org.apache.xerces.internal.util.SymbolTable table = new com.sun.org.apache.xerces.internal.util.SymbolTable();

    99             parser.setProperty("http://apache.org/xml/properties/internal/symbol-table", table);

   100             //obj = parser.getProperty("http://apache.org/xml/properties/internal/symbol-table");

   101         } catch (SAXNotRecognizedException ex) {

   102             //nothing to do

   103         } catch (SAXNotSupportedException ex) {

   104             //nothing to do

   105         }

   106     }

   107 

   108 }