001 /* DataContentHandler.java -- Converts streams to objects and vice versa. 002 Copyright (C) 2004 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 package javax.activation; 039 040 import java.awt.datatransfer.DataFlavor; 041 import java.awt.datatransfer.UnsupportedFlavorException; 042 import java.io.IOException; 043 import java.io.OutputStream; 044 045 /** 046 * Provider that can convert streams to objects and vice versa. 047 * 048 * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 049 * @version 1.1 050 */ 051 public interface DataContentHandler 052 { 053 054 /** 055 * Returns a list of the flavors that data can be provided in, ordered 056 * by preference. 057 */ 058 DataFlavor[] getTransferDataFlavors(); 059 060 /** 061 * Returns an object representing the data to be transferred. 062 * @param df the flavor representing the requested type 063 * @param ds the data source of the data to be converted 064 */ 065 Object getTransferData(DataFlavor df, DataSource ds) 066 throws UnsupportedFlavorException, IOException; 067 068 /** 069 * Returns an object representing the data in its most preferred form. 070 * @param ds the data source of the data to be converted 071 */ 072 Object getContent(DataSource ds) 073 throws IOException; 074 075 /** 076 * Writes the object as a stream of bytes. 077 * @param obj the object to convert 078 * @param mimeType the MIME type of the stream 079 * @param os the byte stream 080 */ 081 void writeTo(Object obj, String mimeType, OutputStream os) 082 throws IOException; 083 084 } 085