001 /* ImageWriterSpi.java -- 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. */ 037 038 039 package javax.imageio.spi; 040 041 import java.awt.image.RenderedImage; 042 import java.io.IOException; 043 044 import javax.imageio.ImageTypeSpecifier; 045 import javax.imageio.ImageWriter; 046 import javax.imageio.stream.ImageOutputStream; 047 048 /** 049 * @author Michael Koch (konqueror@gmx.de) 050 */ 051 public abstract class ImageWriterSpi extends ImageReaderWriterSpi 052 { 053 public static final Class[] STANDARD_OUTPUT_TYPE = 054 { ImageOutputStream.class }; 055 056 protected Class[] outputTypes; 057 protected String[] readerSpiNames; 058 059 protected ImageWriterSpi() 060 { 061 // Do nothing here. 062 } 063 064 public ImageWriterSpi(String vendorName, String version, String[] names, 065 String[] suffixes, String[] MIMETypes, 066 String writerClassName, Class[] outputTypes, 067 String[] readerSpiNames, 068 boolean supportsStandardStreamMetadataFormat, 069 String nativeStreamMetadataFormatName, 070 String nativeStreamMetadataFormatClassName, 071 String[] extraStreamMetadataFormatNames, 072 String[] extraStreamMetadataFormatClassNames, 073 boolean supportsStandardImageMetadataFormat, 074 String nativeImageMetadataFormatName, 075 String nativeImageMetadataFormatClassName, 076 String[] extraImageMetadataFormatNames, 077 String[] extraImageMetadataFormatClassNames) 078 { 079 super(vendorName, version, names, suffixes, MIMETypes, writerClassName, 080 supportsStandardStreamMetadataFormat, nativeStreamMetadataFormatName, 081 nativeStreamMetadataFormatClassName, extraStreamMetadataFormatNames, 082 extraStreamMetadataFormatClassNames, supportsStandardImageMetadataFormat, 083 nativeImageMetadataFormatName, nativeImageMetadataFormatClassName, 084 extraImageMetadataFormatNames, extraImageMetadataFormatClassNames); 085 086 if (writerClassName == null) 087 throw new IllegalArgumentException("writerClassName is null"); 088 089 if (outputTypes == null 090 || outputTypes.length == 0) 091 throw new IllegalArgumentException("outputTypes may not be null or empty"); 092 093 this.outputTypes = outputTypes; 094 this.readerSpiNames = readerSpiNames; 095 } 096 097 public abstract boolean canEncodeImage(ImageTypeSpecifier type); 098 099 public boolean canEncodeImage(RenderedImage image) 100 { 101 return canEncodeImage (new ImageTypeSpecifier(image)); 102 } 103 104 public ImageWriter createWriterInstance() 105 throws IOException 106 { 107 return createWriterInstance(null); 108 } 109 110 public abstract ImageWriter createWriterInstance(Object extension) 111 throws IOException; 112 113 public String[] getImageReaderSpiNames() 114 { 115 return readerSpiNames; 116 } 117 118 public Class[] getOutputTypes() 119 { 120 return outputTypes; 121 } 122 123 public boolean isFormatLossless() 124 { 125 return true; 126 } 127 128 public boolean isOwnWriter(ImageWriter writer) 129 { 130 if (writer == null) 131 throw new IllegalArgumentException("writer may not be null"); 132 133 return pluginClassName.equals(writer.getClass().getName()); 134 } 135 }