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.spi; 27 28 import java.io.File; 29 import java.io.InputStream; 30 import java.io.IOException; 31 import java.util.Locale; 32 import javax.imageio.spi.ImageInputStreamSpi; 33 import javax.imageio.stream.ImageInputStream; 34 import javax.imageio.stream.FileCacheImageInputStream; 35 import javax.imageio.stream.MemoryCacheImageInputStream; 36 37 public class InputStreamImageInputStreamSpi extends ImageInputStreamSpi { 38 39 private static final String vendorName = "Oracle Corporation"; 40 41 private static final String version = "1.0"; 42 43 private static final Class<?> inputClass = InputStream.class; 44 45 public InputStreamImageInputStreamSpi() { 46 super(vendorName, version, inputClass); 47 } 48 49 public String getDescription(Locale locale) { 50 return "Service provider that instantiates a FileCacheImageInputStream or MemoryCacheImageInputStream from an InputStream"; 51 } 52 53 public boolean canUseCacheFile() { 54 return true; 55 } 56 57 public boolean needsCacheFile() { 58 return false; 59 } 60 61 public ImageInputStream createInputStreamInstance(Object input, 62 boolean useCache, 63 File cacheDir) 64 throws IOException { 65 if (input instanceof InputStream) { 66 InputStream is = (InputStream)input; 67 68 if (useCache) { 69 return new FileCacheImageInputStream(is, cacheDir); 70 } else { 71 return new MemoryCacheImageInputStream(is); 72 } 73 } else { 74 throw new IllegalArgumentException(); 75 } 76 } 77 }