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 * 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.

 *

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

import java.awt.datatransfer.DataFlavor;

import java.io.IOException;

import java.io.OutputStream;

import javax.activation.*;

import javax.xml.transform.Source;

import javax.xml.transform.Transformer;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.stream.StreamSource;

import com.sun.xml.internal.messaging.saaj.util.transform.EfficientStreamingTransformer;

/**

 * JAF data handler for XML content

 *

 * @author Anil Vijendran

 */

public class XmlDataContentHandler implements DataContentHandler {

    public static final String STR_SRC = "javax.xml.transform.stream.StreamSource";

    private static Class<?> streamSourceClass = null;

    public XmlDataContentHandler() throws ClassNotFoundException {

        if (streamSourceClass == null) {

            streamSourceClass = Class.forName(STR_SRC);

        }

    }

    /**

     * return the DataFlavors for this <code>DataContentHandler</code>

     * @return The DataFlavors.

     */

    public DataFlavor[] getTransferDataFlavors() { // throws Exception;

        DataFlavor flavors[] = new DataFlavor[2];

        flavors[0] =

            new ActivationDataFlavor(streamSourceClass, "text/xml", "XML");

        flavors[1] =

            new ActivationDataFlavor(streamSourceClass, "application/xml", "XML");

        return flavors;

    }

    /**

     * return the Transfer Data of type DataFlavor from InputStream

     * @return The constructed Object.

     */

    public Object getTransferData(DataFlavor flavor, DataSource dataSource)

        throws IOException {

        if (flavor.getMimeType().startsWith("text/xml") ||

                flavor.getMimeType().startsWith("application/xml")) {

            if (flavor.getRepresentationClass().getName().equals(STR_SRC)) {

                return new StreamSource(dataSource.getInputStream());

            }

        }

        return null;

    }

    /**

     *

     */

    public Object getContent(DataSource dataSource) throws IOException {

        return new StreamSource(dataSource.getInputStream());

    }

    /**

     * construct an object from a byte stream

     * (similar semantically to previous method, we are deciding

     *  which one to support)

     */

    public void writeTo(Object obj, String mimeType, OutputStream os)

        throws IOException {

        if (!mimeType.startsWith("text/xml") && !mimeType.startsWith("application/xml"))

            throw new IOException(

                "Invalid content type \"" + mimeType + "\" for XmlDCH");

        try {

            Transformer transformer = EfficientStreamingTransformer.newTransformer();

            StreamResult result = new StreamResult(os);

            if (obj instanceof DataSource) {

                // Streaming transform applies only to javax.xml.transform.StreamSource

                transformer.transform((Source) getContent((DataSource)obj), result);

            } else {

                Source src=null;

                if (obj instanceof String) {

                     src= new StreamSource(new java.io.StringReader((String) obj));

                } else {

                    src=(Source) obj;

                }

                transformer.transform(src, result);

            }

        } catch (Exception ex) {

            throw new IOException(

                "Unable to run the JAXP transformer on a stream "

                    + ex.getMessage());

        }

    }

}