/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package mime.custom;

import java.awt.datatransfer.DataFlavor;
import java.io.IOException;
import java.io.OutputStream;

import javax.activation.*;

/**
 * DataContentHandler for Content-Type : custom/factory
 *
 * @author Jitendra Kotamraju (jitendra.kotamraju@sun.com)
 */
public class FactoryDataContentHandler implements DataContentHandler {
   
    private static ActivationDataFlavor myDF =
        new ActivationDataFlavor(
            mime.custom.CustomType.class,
            "custom/factory",
            "Custom Type");

    protected ActivationDataFlavor getDF() {
        return myDF;
    }

    /**
     * Return the DataFlavors for this <code>DataContentHandler</code>.
     *
     * @return The DataFlavors
     */
    @Override
    public DataFlavor[] getTransferDataFlavors() { // throws Exception;
        return new DataFlavor[] { getDF() };
    }

    /**
     * Return the Transfer Data of type DataFlavor from InputStream.
     *
     * @param df The DataFlavor
     * @param ins The InputStream corresponding to the data
     * @return String object
     */
    @Override
    public Object getTransferData(DataFlavor df, DataSource ds)
        throws IOException {
        // use myDF.equals to be sure to get ActivationDataFlavor.equals,
        // which properly ignores Content-Type parameters in comparison
        if (getDF().equals(df))
            return getContent(ds);
        else
            return null;
    }

    @Override
    public Object getContent(DataSource ds) throws IOException {
        return new CustomType();
    }

    /**
     * Write the object to the output stream, using the specified MIME type.
     */
    @Override
    public void writeTo(Object obj, String type, OutputStream os)
        throws IOException {
        if (!(obj instanceof CustomType)) {             
            throw new IOException(
                    getDF().getMimeType()
                    + " DataContentHandler requires CustomType object, "
                    + "instead got "
                    + obj.getClass().toString());
        }
		os.write((int)'F');
		os.flush();
    }
}
