| /* DataSourceDataContentHolder.java -- DCH using an existing data source. |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package javax.activation; |
| |
| import java.awt.datatransfer.DataFlavor; |
| import java.awt.datatransfer.UnsupportedFlavorException; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * Data content handler using an existing DCH and a data source. |
| * |
| * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> |
| * @version 1.1 |
| */ |
| class DataSourceDataContentHandler |
| implements DataContentHandler |
| { |
| |
| private DataSource ds; |
| private DataFlavor[] flavors; |
| private DataContentHandler dch; |
| |
| public DataSourceDataContentHandler(DataContentHandler dch, DataSource ds) |
| { |
| this.ds = ds; |
| this.dch = dch; |
| } |
| |
| public Object getContent(DataSource ds) |
| throws IOException |
| { |
| if (dch != null) |
| { |
| return dch.getContent(ds); |
| } |
| else |
| { |
| return ds.getInputStream(); |
| } |
| } |
| |
| public Object getTransferData(DataFlavor flavor, DataSource ds) |
| throws UnsupportedFlavorException, IOException |
| { |
| if (dch != null) |
| { |
| return dch.getTransferData(flavor, ds); |
| } |
| DataFlavor[] tdf = getTransferDataFlavors(); |
| if (tdf.length > 0 && flavor.equals(tdf[0])) |
| { |
| return ds.getInputStream(); |
| } |
| else |
| { |
| throw new UnsupportedFlavorException(flavor); |
| } |
| } |
| |
| public DataFlavor[] getTransferDataFlavors() |
| { |
| if (flavors == null) |
| { |
| if (dch != null) |
| { |
| flavors = dch.getTransferDataFlavors(); |
| } |
| else |
| { |
| String mimeType = ds.getContentType(); |
| flavors = new DataFlavor[1]; |
| flavors[0] = new ActivationDataFlavor(mimeType, mimeType); |
| } |
| } |
| return flavors; |
| } |
| |
| public void writeTo(Object obj, String mimeType, OutputStream out) |
| throws IOException |
| { |
| if (dch == null) |
| { |
| throw new UnsupportedDataTypeException("no DCH for content type " + |
| ds.getContentType()); |
| } |
| dch.writeTo(obj, mimeType, out); |
| } |
| |
| } |
| |