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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [javax/] [activation/] [ObjectDataContentHandler.java] - Blame information for rev 772

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1 772 jeremybenn
/* ObjectDataContentHandler.java -- Data content handler using an object.
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   Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.activation;
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import java.awt.datatransfer.DataFlavor;
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import java.awt.datatransfer.UnsupportedFlavorException;
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import java.io.IOException;
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import java.io.OutputStream;
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/**
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 * Data content handler that uses an existing DCH and reified object.
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 *
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 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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 * @version 1.1
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 */
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class ObjectDataContentHandler
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  implements DataContentHandler
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{
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  private DataContentHandler dch;
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  private Object object;
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  private String mimeType;
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  private DataFlavor[] flavors;
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  public ObjectDataContentHandler(DataContentHandler dch, Object object,
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                                  String mimeType)
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  {
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    this.dch = dch;
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    this.object = object;
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    this.mimeType = mimeType;
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  }
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  public Object getContent(DataSource ds)
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  {
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    return object;
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  }
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  public DataContentHandler getDCH()
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  {
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    return dch;
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  }
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  public Object getTransferData(DataFlavor flavor, DataSource ds)
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    throws UnsupportedFlavorException, IOException
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  {
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    if (dch != null)
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      {
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        return dch.getTransferData(flavor, ds);
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      }
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    if (flavors == null)
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      {
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        getTransferDataFlavors();
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      }
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    if (flavor.equals(flavors[0]))
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      {
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        return object;
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      }
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    throw new UnsupportedFlavorException(flavor);
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  }
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  public DataFlavor[] getTransferDataFlavors()
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  {
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    if (flavors == null)
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      {
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        if (dch != null)
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          {
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            flavors = dch.getTransferDataFlavors();
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          }
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        else
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          {
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            flavors = new DataFlavor[1];
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            flavors[0] = new ActivationDataFlavor(object.getClass(),
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                                                  mimeType, mimeType);
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          }
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      }
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    return flavors;
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  }
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  public void writeTo(Object object, String mimeType, OutputStream out)
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    throws IOException
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  {
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    if (dch != null)
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      {
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        dch.writeTo(object, mimeType, out);
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      }
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    else
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      {
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        throw new UnsupportedDataTypeException("no object DCH for MIME type " + mimeType);
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      }
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  }
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}

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