The Android Open Source Project | 7c1b96a | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
| 3 | * contributor license agreements. See the NOTICE file distributed with |
| 4 | * this work for additional information regarding copyright ownership. |
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
| 6 | * (the "License"); you may not use this file except in compliance with |
| 7 | * the License. You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | /** |
| 18 | * @author Rustem V. Rafikov |
| 19 | * @version $Revision: 1.3 $ |
| 20 | */ |
| 21 | package javax.imageio.spi; |
| 22 | |
| 23 | import java.util.Arrays; |
| 24 | |
| 25 | import org.apache.harmony.x.imageio.plugins.jpeg.JPEGImageReaderSpi; |
| 26 | import org.apache.harmony.x.imageio.plugins.jpeg.JPEGImageWriterSpi; |
| 27 | import org.apache.harmony.x.imageio.plugins.png.PNGImageReaderSpi; |
| 28 | import org.apache.harmony.x.imageio.plugins.png.PNGImageWriterSpi; |
| 29 | import org.apache.harmony.x.imageio.spi.FileIISSpi; |
| 30 | import org.apache.harmony.x.imageio.spi.FileIOSSpi; |
| 31 | import org.apache.harmony.x.imageio.spi.InputStreamIISSpi; |
| 32 | import org.apache.harmony.x.imageio.spi.OutputStreamIOSSpi; |
| 33 | import org.apache.harmony.x.imageio.spi.RAFIISSpi; |
| 34 | import org.apache.harmony.x.imageio.spi.RAFIOSSpi; |
| 35 | |
| 36 | /* |
| 37 | * @author Rustem V. Rafikov, Viskov Nikolay |
| 38 | * @version $Revision: 1.3 $ |
| 39 | */ |
| 40 | |
| 41 | /** |
| 42 | * The IIORegistry class registers service provider instances |
| 43 | * (SPI). Service provider instances are recognized by specific |
| 44 | * meta-information in the JAR files containing them. The JAR |
| 45 | * files with SPI classes are loaded from the application class |
| 46 | * path. |
| 47 | */ |
| 48 | public final class IIORegistry extends ServiceRegistry { |
| 49 | |
| 50 | /** The instance. */ |
| 51 | private static IIORegistry instance; |
| 52 | |
| 53 | /** The Constant CATEGORIES. */ |
| 54 | private static final Class[] CATEGORIES = new Class[] { |
| 55 | javax.imageio.spi.ImageWriterSpi.class, |
| 56 | javax.imageio.spi.ImageReaderSpi.class, |
| 57 | javax.imageio.spi.ImageInputStreamSpi.class, |
| 58 | //javax.imageio.spi.ImageTranscoderSpi.class, |
| 59 | javax.imageio.spi.ImageOutputStreamSpi.class |
| 60 | }; |
| 61 | |
| 62 | /** |
| 63 | * Instantiates a new iIO registry. |
| 64 | */ |
| 65 | private IIORegistry() { |
| 66 | super(Arrays.<Class<?>>asList(CATEGORIES).iterator()); |
| 67 | registerBuiltinSpis(); |
| 68 | registerApplicationClasspathSpis(); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Register builtin spis. |
| 73 | */ |
| 74 | private void registerBuiltinSpis() { |
| 75 | registerServiceProvider(new JPEGImageWriterSpi()); |
| 76 | registerServiceProvider(new JPEGImageReaderSpi()); |
| 77 | registerServiceProvider(new PNGImageReaderSpi()); |
| 78 | registerServiceProvider(new PNGImageWriterSpi()); |
| 79 | registerServiceProvider(new FileIOSSpi()); |
| 80 | registerServiceProvider(new FileIISSpi()); |
| 81 | registerServiceProvider(new RAFIOSSpi()); |
| 82 | registerServiceProvider(new RAFIISSpi()); |
| 83 | registerServiceProvider(new OutputStreamIOSSpi()); |
| 84 | registerServiceProvider(new InputStreamIISSpi()); |
| 85 | //-- TODO implement |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Gets the default IIORegistry instance. |
| 90 | * |
| 91 | * @return the default IIORegistry instance. |
| 92 | */ |
| 93 | public static IIORegistry getDefaultInstance() { |
| 94 | // TODO implement own instance for each ThreadGroup (see also ThreadLocal) |
| 95 | synchronized (IIORegistry.class) { |
| 96 | if (instance == null) { |
| 97 | instance = new IIORegistry(); |
| 98 | } |
| 99 | return instance; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Registers all service providers from the application class |
| 105 | * path. |
| 106 | */ |
| 107 | public void registerApplicationClasspathSpis() { |
| 108 | //-- TODO implement for non-builtin plugins |
| 109 | } |
| 110 | } |