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 }