1 /* 2 * Copyright (c) 2005, 2011, 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 ******************************************************************************* 28 * (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved * 29 * * 30 * The original version of this source code and documentation is copyrighted * 31 * and owned by IBM, These materials are provided under terms of a License * 32 * Agreement between IBM and Sun. This technology is protected by multiple * 33 * US and International patents. This notice and attribution to IBM may not * 34 * to removed. * 35 ******************************************************************************* 36 */ 37 38 package sun.text.normalizer; 39 40 import java.io.InputStream; 41 import java.net.URL; 42 import java.security.AccessController; 43 import java.security.PrivilegedAction; 44 import java.util.MissingResourceException; 45 46 /** 47 * Provides access to ICU data files as InputStreams. Implements security checking. 48 */ 49 public final class ICUData { 50 51 private static InputStream getStream(final Class<ICUData> root, final String resourceName, boolean required) { 52 InputStream i = null; 53 54 if (System.getSecurityManager() != null) { 55 i = AccessController.doPrivileged(new PrivilegedAction<InputStream>() { 56 public InputStream run() { 57 return root.getResourceAsStream(resourceName); 58 } 59 }); 60 } else { 61 i = root.getResourceAsStream(resourceName); 62 } 63 64 if (i == null && required) { 65 throw new MissingResourceException("could not locate data", root.getPackage().getName(), resourceName); 66 } 67 return i; 68 } 69 70 /* 71 * Convenience override that calls getStream(ICUData.class, resourceName, false); 72 */ 73 public static InputStream getStream(String resourceName) { 74 return getStream(ICUData.class, resourceName, false); 75 } 76 77 /* 78 * Convenience method that calls getStream(ICUData.class, resourceName, true). 79 */ 80 public static InputStream getRequiredStream(String resourceName) { 81 return getStream(ICUData.class, resourceName, true); 82 } 83 }