rev 9343 : 8033716: Fix raw and unchecked lint warnings in com.sun.imageio
Reviewed-by: darcy, prr, bae

   1 /*
   2  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.imageio.plugins.gif;
  27 
  28 import java.io.IOException;
  29 import java.util.Locale;
  30 import java.util.Iterator;
  31 import javax.imageio.ImageReader;
  32 import javax.imageio.metadata.IIOMetadataFormat;
  33 import javax.imageio.metadata.IIOMetadataFormatImpl;
  34 import javax.imageio.spi.ImageReaderSpi;
  35 import javax.imageio.stream.ImageInputStream;
  36 
  37 public class GIFImageReaderSpi extends ImageReaderSpi {
  38 
  39     private static final String vendorName = "Oracle Corporation";
  40 
  41     private static final String version = "1.0";
  42 
  43     private static final String[] names = { "gif", "GIF" };
  44 
  45     private static final String[] suffixes = { "gif" };
  46 
  47     private static final String[] MIMETypes = { "image/gif" };
  48 
  49     private static final String readerClassName =
  50         "com.sun.imageio.plugins.gif.GIFImageReader";
  51 
  52     private static final String[] writerSpiNames = {
  53         "com.sun.imageio.plugins.gif.GIFImageWriterSpi"
  54     };
  55 
  56     public GIFImageReaderSpi() {
  57         super(vendorName,
  58               version,
  59               names,
  60               suffixes,
  61               MIMETypes,
  62               readerClassName,
  63               new Class<?>[] { ImageInputStream.class },
  64               writerSpiNames,
  65               true,
  66               GIFStreamMetadata.nativeMetadataFormatName,
  67               "com.sun.imageio.plugins.gif.GIFStreamMetadataFormat",
  68               null, null,
  69               true,
  70               GIFImageMetadata.nativeMetadataFormatName,
  71               "com.sun.imageio.plugins.gif.GIFImageMetadataFormat",
  72               null, null
  73               );
  74     }
  75 
  76     public String getDescription(Locale locale) {
  77         return "Standard GIF image reader";
  78     }
  79 
  80     public boolean canDecodeInput(Object input) throws IOException {
  81         if (!(input instanceof ImageInputStream)) {
  82             return false;
  83         }
  84 
  85         ImageInputStream stream = (ImageInputStream)input;
  86         byte[] b = new byte[6];
  87         stream.mark();
  88         stream.readFully(b);
  89         stream.reset();
  90 
  91         return b[0] == 'G' && b[1] == 'I' && b[2] == 'F' && b[3] == '8' &&
  92             (b[4] == '7' || b[4] == '9') && b[5] == 'a';
  93     }
  94 
  95     public ImageReader createReaderInstance(Object extension) {
  96         return new GIFImageReader(this);
  97     }
  98 
  99 }
--- EOF ---