116 lines
3.9 KiB
Java
116 lines
3.9 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Rustem V. Rafikov
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* @version $Revision: 1.3 $
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*/
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package javax.imageio.spi;
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import java.util.Arrays;
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import org.apache.harmony.x.imageio.plugins.jpeg.JPEGImageReaderSpi;
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import org.apache.harmony.x.imageio.plugins.jpeg.JPEGImageWriterSpi;
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import org.apache.harmony.x.imageio.plugins.png.PNGImageReaderSpi;
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import org.apache.harmony.x.imageio.plugins.png.PNGImageWriterSpi;
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import org.apache.harmony.x.imageio.spi.FileIISSpi;
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import org.apache.harmony.x.imageio.spi.FileIOSSpi;
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import org.apache.harmony.x.imageio.spi.InputStreamIISSpi;
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import org.apache.harmony.x.imageio.spi.OutputStreamIOSSpi;
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import org.apache.harmony.x.imageio.spi.RAFIISSpi;
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import org.apache.harmony.x.imageio.spi.RAFIOSSpi;
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/*
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* @author Rustem V. Rafikov, Viskov Nikolay
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* @version $Revision: 1.3 $
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*/
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/**
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* The IIORegistry class registers service provider instances (SPI). Service
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* provider instances are recognized by specific meta-information in the JAR
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* files containing them. The JAR files with SPI classes are loaded from the
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* application class path.
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*
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* @since Android 1.0
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*/
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public final class IIORegistry extends ServiceRegistry {
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/**
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* The instance.
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*/
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private static IIORegistry instance;
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/**
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* The Constant CATEGORIES.
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*/
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private static final Class[] CATEGORIES = new Class[] {
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javax.imageio.spi.ImageWriterSpi.class, javax.imageio.spi.ImageReaderSpi.class,
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javax.imageio.spi.ImageInputStreamSpi.class,
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// javax.imageio.spi.ImageTranscoderSpi.class,
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javax.imageio.spi.ImageOutputStreamSpi.class
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};
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/**
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* Instantiates a new IIO registry.
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*/
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private IIORegistry() {
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super(Arrays.<Class<?>> asList(CATEGORIES).iterator());
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registerBuiltinSpis();
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registerApplicationClasspathSpis();
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}
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/**
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* Register built-in SPIs.
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*/
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private void registerBuiltinSpis() {
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registerServiceProvider(new JPEGImageWriterSpi());
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registerServiceProvider(new JPEGImageReaderSpi());
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registerServiceProvider(new PNGImageReaderSpi());
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registerServiceProvider(new PNGImageWriterSpi());
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registerServiceProvider(new FileIOSSpi());
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registerServiceProvider(new FileIISSpi());
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registerServiceProvider(new RAFIOSSpi());
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registerServiceProvider(new RAFIISSpi());
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registerServiceProvider(new OutputStreamIOSSpi());
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registerServiceProvider(new InputStreamIISSpi());
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// -- TODO implement
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}
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/**
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* Gets the default IIORegistry instance.
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*
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* @return the default IIORegistry instance.
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*/
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public static IIORegistry getDefaultInstance() {
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// TODO implement own instance for each ThreadGroup (see also
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// ThreadLocal)
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synchronized (IIORegistry.class) {
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if (instance == null) {
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instance = new IIORegistry();
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}
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return instance;
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}
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}
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/**
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* Registers all service providers from the application class path.
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*/
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public void registerApplicationClasspathSpis() {
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// -- TODO implement for non-builtin plugins
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}
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}
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