1 /* 2 * Copyright (c) 2016, 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 package jdk.jshell.execution; 26 27 import java.io.File; 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 import jdk.jshell.spi.ExecutionControl.ClassBytecodes; 34 import jdk.jshell.spi.ExecutionControl.ClassInstallException; 35 import jdk.jshell.spi.ExecutionControl.EngineTerminationException; 36 import jdk.jshell.spi.ExecutionControl.InternalException; 37 import jdk.jshell.spi.ExecutionControl.NotImplementedException; 38 39 /** 40 * The standard implementation of {@link LoaderDelegate} using 41 * a {@link URLClassLoader}. 42 * 43 * @author Robert Field 44 */ 45 class DefaultLoaderDelegate implements LoaderDelegate { 46 47 private final RemoteClassLoader loader; 48 private final Map<String, Class<?>> klasses = new TreeMap<>(); 49 50 class RemoteClassLoader extends URLClassLoader { 51 52 private final Map<String, byte[]> classObjects = new TreeMap<>(); 53 54 RemoteClassLoader() { 55 super(new URL[0]); 56 } 57 58 void delare(String name, byte[] bytes) { 59 classObjects.put(name, bytes); 60 } 61 62 @Override 63 protected Class<?> findClass(String name) throws ClassNotFoundException { 64 byte[] b = classObjects.get(name); 65 if (b == null) { 66 return super.findClass(name); 67 } 68 return super.defineClass(name, b, 0, b.length, (CodeSource) null); 69 } 70 71 @Override 72 public void addURL(URL url) { 73 super.addURL(url); 74 } 75 76 } 77 78 public DefaultLoaderDelegate() { 79 this.loader = new RemoteClassLoader(); 80 } 81 82 @Override 83 public void load(ClassBytecodes[] cbcs) 84 throws ClassInstallException, EngineTerminationException { 85 boolean[] loaded = new boolean[cbcs.length]; 86 try { 87 for (ClassBytecodes cbc : cbcs) { 88 loader.delare(cbc.name(), cbc.bytecodes()); 89 } 90 for (int i = 0; i < cbcs.length; ++i) { 91 ClassBytecodes cbc = cbcs[i]; 92 Class<?> klass = loader.loadClass(cbc.name()); 93 klasses.put(cbc.name(), klass); 94 loaded[i] = true; 95 // Get class loaded to the point of, at least, preparation 96 klass.getDeclaredMethods(); 97 } 98 } catch (Throwable ex) { 99 throw new ClassInstallException("load: " + ex.getMessage(), loaded); 100 } 101 } 102 103 104 @Override 105 public void addToClasspath(String cp) 106 throws EngineTerminationException, InternalException { 107 try { 108 for (String path : cp.split(File.pathSeparator)) { 109 loader.addURL(new File(path).toURI().toURL()); 110 } 111 } catch (Exception ex) { 112 throw new InternalException(ex.toString()); 113 } 114 } 115 116 @Override 117 public void setClasspath(String path) 118 throws EngineTerminationException, InternalException { 119 throw new NotImplementedException("setClasspath: Not supported yet."); 120 } 121 122 @Override 123 public Class<?> findClass(String name) throws ClassNotFoundException { 124 Class<?> klass = klasses.get(name); 125 if (klass == null) { 126 throw new ClassNotFoundException(name + " not found"); 127 } else { 128 return klass; 129 } 130 } 131 132 }