/*
* ObjectDataContentHandler.java
* Copyright (C) 2004 The Free Software Foundation
*
* This file is part of GNU Java Activation Framework (JAF), a library.
*
* GNU JAF is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JAF 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package javax.activation;
import java.io.IOException;
import java.io.OutputStream;
import at.dasz.KolabDroid.glue.DataFlavor;
import at.dasz.KolabDroid.glue.UnsupportedFlavorException;
/**
* Data content handler that uses an existing DCH and reified object.
*
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
* @version 1.1
*/
class ObjectDataContentHandler
implements DataContentHandler
{
private DataContentHandler dch;
private Object object;
private String mimeType;
private DataFlavor[] flavors;
public ObjectDataContentHandler(DataContentHandler dch, Object object,
String mimeType)
{
this.dch = dch;
this.object = object;
this.mimeType = mimeType;
}
public Object getContent(DataSource ds)
{
return object;
}
public DataContentHandler getDCH()
{
return dch;
}
public Object getTransferData(DataFlavor flavor, DataSource ds)
throws UnsupportedFlavorException, IOException
{
if (dch != null)
{
return dch.getTransferData(flavor, ds);
}
if (flavors == null)
{
getTransferDataFlavors();
}
if (flavor.equals(flavors[0]))
{
return object;
}
throw new UnsupportedFlavorException(flavor);
}
public DataFlavor[] getTransferDataFlavors()
{
if (flavors == null)
{
if (dch != null)
{
flavors = dch.getTransferDataFlavors();
}
else
{
flavors = new DataFlavor[1];
flavors[0] = new ActivationDataFlavor(object.getClass(),
mimeType, mimeType);
}
}
return flavors;
}
public void writeTo(Object object, String mimeType, OutputStream out)
throws IOException
{
if (dch != null)
{
dch.writeTo(object, mimeType, out);
}
else
{
throw new UnsupportedDataTypeException("no object DCH for MIME type " + mimeType);
}
}
}