1 /* 2 * Copyright (c) 2014, 2015, 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 jdk.internal.jshell.remote; 27 28 import java.net.URL; 29 import java.net.URLClassLoader; 30 import java.security.CodeSource; 31 import java.util.Map; 32 import java.util.TreeMap; 33 34 /** 35 * Class loader wrapper which caches class files by name until requested. 36 * @author Robert Field 37 */ 38 class RemoteClassLoader extends URLClassLoader { 39 40 private final Map<String, byte[]> classObjects = new TreeMap<>(); 41 42 RemoteClassLoader() { 43 super(new URL[0]); 44 } 45 46 void delare(String name, byte[] bytes) { 47 classObjects.put(name, bytes); 48 } 49 50 @Override 51 protected Class<?> findClass(String name) throws ClassNotFoundException { 52 byte[] b = classObjects.get(name); 53 if (b == null) { 54 return super.findClass(name); 55 } 56 return super.defineClass(name, b, 0, b.length, (CodeSource) null); 57 } 58 59 @Override 60 public void addURL(URL url) { 61 super.addURL(url); 62 } 63 64 }