1 /* 2 * Copyright (c) 1996, 1998, 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 27 package sun.tools.jar; 28 29 import sun.awt.image.URLImageSource; 30 import sun.awt.image.ImageDecoder; 31 import java.net.URL; 32 import java.net.JarURLConnection; 33 import java.util.jar.JarFile; 34 import java.util.jar.JarEntry; 35 import java.io.InputStream; 36 import java.io.IOException; 37 38 39 public class JarImageSource extends URLImageSource { 40 String mimeType; 41 String entryName = null; 42 URL url; 43 44 /** 45 * Create an image source from a Jar entry URL with the specified 46 * mime type. 47 */ 48 public JarImageSource(URL u, String type) { 49 super(u); 50 url = u; 51 mimeType = type; 52 } 53 54 /** 55 * Create an image source from a Jar file/entry URL 56 * with the specified entry name and mime type. 57 */ 58 public JarImageSource(URL u, String name, String type) { 59 this(u, type); 60 this.entryName = name; 61 } 62 63 protected ImageDecoder getDecoder() { 64 InputStream is = null; 65 try { 66 JarURLConnection c = (JarURLConnection)url.openConnection(); 67 JarFile f = c.getJarFile(); 68 JarEntry e = c.getJarEntry(); 69 70 if (entryName != null && e == null) { 71 e = f.getJarEntry(entryName); 72 } 73 if (e == null || (e != null && entryName != null 74 && (!(entryName.equals(e.getName()))))) { 75 return null; 76 } 77 is = f.getInputStream(e); 78 } catch (IOException e) { 79 return null; 80 } 81 82 ImageDecoder id = decoderForType(is, mimeType); 83 if (id == null) { 84 id = getDecoder(is); 85 } 86 return id; 87 } 88 }