/* * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.imageio.plugins.jpeg; import java.util.Locale;import javax.imageio.spi.ImageReaderSpi;import javax.imageio.stream.ImageInputStream;import javax.imageio.spi.IIORegistry;import javax.imageio.spi.ServiceRegistry;import java.io.IOException;import javax.imageio.ImageReader;import javax.imageio.IIOException; public class JPEGImageReaderSpi extends ImageReaderSpi {     private static String [] writerSpiNames =        {"com.sun.imageio.plugins.jpeg.JPEGImageWriterSpi"};     public JPEGImageReaderSpi() {        super(JPEG.vendor,              JPEG.version,              JPEG.names,              JPEG.suffixes,              JPEG.MIMETypes,              "com.sun.imageio.plugins.jpeg.JPEGImageReader",              new Class[] { ImageInputStream.class },              writerSpiNames,              true,              JPEG.nativeStreamMetadataFormatName,              JPEG.nativeStreamMetadataFormatClassName,              null, null,              true,              JPEG.nativeImageMetadataFormatName,              JPEG.nativeImageMetadataFormatClassName,              null, null              );    }     public String getDescription(Locale locale) {        return "Standard JPEG Image Reader";    }     public boolean canDecodeInput(Object source) throws IOException {        if (!(source instanceof ImageInputStream)) {            return false;        }        ImageInputStream iis = (ImageInputStream) source;        iis.mark();        // If the first two bytes are a JPEG SOI marker, it's probably        // a JPEG file.  If they aren't, it definitely isn't a JPEG file.        int byte1 = iis.read();        int byte2 = iis.read();        iis.reset();        if ((byte1 == 0xFF) && (byte2 == JPEG.SOI)) {            return true;        }        return false;    }     public ImageReader createReaderInstance(Object extension)        throws IIOException {        return new JPEGImageReader(this);    } }