/*

 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.

 * 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.stream.buffer;

import com.sun.xml.internal.stream.buffer.sax.SAXBufferCreator;

import javax.xml.transform.sax.SAXResult;

import org.xml.sax.ContentHandler;

import org.xml.sax.ext.LexicalHandler;

/**

 * A JAXP Result implementation that supports the serialization to an

 * {@link MutableXMLStreamBuffer} for use by applications that expect a Result.

 *

 * <p>

 * Reuse of a XMLStreamBufferResult more than once will require that the

 * MutableXMLStreamBuffer is reset by called

 * {@link #.getXMLStreamBuffer()}.reset(), or by calling

 * {@link #.setXMLStreamBuffer()} with a new instance of

 * {@link MutableXMLStreamBuffer}.

 *

 * <p>

 * The derivation of XMLStreamBufferResult from SAXResult is an implementation

 * detail.

 *

 * <p>General applications shall not call the following methods:

 * <ul>

 * <li>setHandler</li>

 * <li>setLexicalHandler</li>

 * <li>setSystemId</li>

 * </ul>

 */

public class XMLStreamBufferResult extends SAXResult {

    protected MutableXMLStreamBuffer _buffer;

    protected SAXBufferCreator _bufferCreator;

    /**

     * The default XMLStreamBufferResult constructor.

     *

     * <p>

     * A {@link MutableXMLStreamBuffer} is instantiated and used.

     */

    public XMLStreamBufferResult() {

        setXMLStreamBuffer(new MutableXMLStreamBuffer());

    }

    /**

     * XMLStreamBufferResult constructor.

     *

     * @param buffer the {@link MutableXMLStreamBuffer} to use.

     */

    public XMLStreamBufferResult(MutableXMLStreamBuffer buffer) {

        setXMLStreamBuffer(buffer);

    }

    /**

     * Get the {@link MutableXMLStreamBuffer} that is used.

     *

     * @return the {@link MutableXMLStreamBuffer}.

     */

    public MutableXMLStreamBuffer getXMLStreamBuffer() {

        return _buffer;

    }

    /**

     * Set the {@link MutableXMLStreamBuffer} to use.

     *

     * @param buffer the {@link MutableXMLStreamBuffer}.

     */

    public void setXMLStreamBuffer(MutableXMLStreamBuffer buffer) {

        if (buffer == null) {

            throw new NullPointerException("buffer cannot be null");

        }

        _buffer = buffer;

        setSystemId(_buffer.getSystemId());

        if (_bufferCreator != null) {

            _bufferCreator.setXMLStreamBuffer(_buffer);

        }

    }

    public ContentHandler getHandler() {

        if (_bufferCreator == null) {

            _bufferCreator = new SAXBufferCreator(_buffer);

            setHandler(_bufferCreator);

        } else if (super.getHandler() == null) {

            setHandler(_bufferCreator);

        }

        return _bufferCreator;

    }

    public LexicalHandler getLexicalHandler() {

        return (LexicalHandler) getHandler();

    }

}