/*

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

 *

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

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

 * published by the Free Software Foundation.  Oracle designates this

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

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

 *

 * This code 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

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

 * accompanied this code).

 *

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

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

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

 *

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

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

import org.xml.sax.SAXException;

import java.util.concurrent.ArrayBlockingQueue;

import java.util.concurrent.BlockingQueue;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.SAXNotRecognizedException;

import org.xml.sax.SAXNotSupportedException;

/**

 * Pool of SAXParser objects

 */

public class ParserPool {

    private SAXParserFactory factory;

    public ParserPool(int capacity) {

        //factory = SAXParserFactory.newInstance();

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

        factory.setNamespaceAware(true);

           try {

                queue.put(factory.newSAXParser());

            } catch (InterruptedException ex) {

                Thread.currentThread().interrupt();

                throw new RuntimeException(ex);

            } catch (ParserConfigurationException ex) {

                throw new RuntimeException(ex);

            } catch (SAXException ex) {

                throw new RuntimeException(ex);

            }

        }

    }

    public SAXParser get() throws ParserConfigurationException,

                SAXException {

        try {

            return (SAXParser) queue.take();

        } catch (InterruptedException ex) {

            throw new SAXException(ex);

        }

    }

    }

    public void returnParser(SAXParser saxParser) {

        saxParser.reset();

        resetSaxParser(saxParser);

        put(saxParser);

    }

    /**

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

     * Xerces does not provide a way to reset the SymbolTable

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

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

     * is fixed.

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

     */

     private void resetSaxParser(SAXParser parser) {

        try {

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

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

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

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

        } catch (SAXNotRecognizedException ex) {

            //nothing to do

        } catch (SAXNotSupportedException ex) {

            //nothing to do

        }

    }

}