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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.ws.encoding;

import com.sun.xml.internal.ws.util.xml.XmlUtil;

import javax.activation.ActivationDataFlavor;

import javax.activation.DataContentHandler;

import javax.activation.DataSource;

import javax.xml.transform.OutputKeys;

import javax.xml.transform.Source;

import javax.xml.transform.Transformer;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.stream.StreamSource;

import java.awt.datatransfer.DataFlavor;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.util.Arrays;

/**

 * JAF data handler for XML content

 *

 * @author Jitendra Kotamraju

 */

public class XmlDataContentHandler implements DataContentHandler {

    private final DataFlavor[] flavors;

    public XmlDataContentHandler() throws ClassNotFoundException {

        flavors = new DataFlavor[3];

        flavors[0] = new ActivationDataFlavor(StreamSource.class, "text/xml", "XML");

        flavors[1] = new ActivationDataFlavor(StreamSource.class, "application/xml", "XML");

        flavors[2] = new ActivationDataFlavor(String.class, "text/xml", "XML String");

    }

    public DataFlavor[] getTransferDataFlavors() {

        return Arrays.copyOf(flavors, flavors.length);

    }

    public Object getTransferData(DataFlavor df, DataSource ds)

        throws IOException {

        for (DataFlavor aFlavor : flavors) {

            if (aFlavor.equals(df)) {

                return getContent(ds);

            }

        }

        return null;

    }

    /**

     * Create an object from the input stream

     */

    public Object getContent(DataSource ds) throws IOException {

        String ctStr = ds.getContentType();

        String charset = null;

        if (ctStr != null) {

            ContentType ct = new ContentType(ctStr);

            if (!isXml(ct)) {

                throw new IOException(

                    "Cannot convert DataSource with content type \""

                            + ctStr + "\" to object in XmlDataContentHandler");

            }

            charset = ct.getParameter("charset");

        }

        return (charset != null)

                ? new StreamSource(new InputStreamReader(ds.getInputStream()), charset)

                : new StreamSource(ds.getInputStream());

    }

    /**

     * Convert the object to a byte stream

     */

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

        throws IOException {

        if (!(obj instanceof DataSource || obj instanceof Source || obj instanceof String)) {

             throw new IOException("Invalid Object type = "+obj.getClass()+

                ". XmlDataContentHandler can only convert DataSource|Source|String to XML.");

        }

        ContentType ct = new ContentType(mimeType);

        if (!isXml(ct)) {

            throw new IOException(

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

        }

        String charset = ct.getParameter("charset");

        if (obj instanceof String) {

            String s = (String) obj;

            if (charset == null) {

                charset = "utf-8";

            }

            OutputStreamWriter osw = new OutputStreamWriter(os, charset);

            osw.write(s, 0, s.length());

            osw.flush();

            return;

        }

        Source source = (obj instanceof DataSource)

                ? (Source)getContent((DataSource)obj) : (Source)obj;

        try {

            Transformer transformer = XmlUtil.newTransformer();

            if (charset != null) {

                transformer.setOutputProperty(OutputKeys.ENCODING, charset);

            }

            StreamResult result = new StreamResult(os);

            transformer.transform(source, result);

        } catch (Exception ex) {

            throw new IOException(

                "Unable to run the JAXP transformer in XmlDataContentHandler "

                    + ex.getMessage());

        }

    }

    private boolean isXml(ContentType ct) {

    }

}