| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.*; |
| import java.net.URI; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.tools.*; |
| |
| import static java.util.Collections.unmodifiableMap; |
| |
| /** |
| * class for storing source/byte code in memory. |
| */ |
| public class InMemoryFileManager extends ForwardingJavaFileManager { |
| |
| private final Map<String, InMemoryJavaFile> classes = new HashMap<>(); |
| |
| public InMemoryFileManager(JavaFileManager fileManager) { |
| super(fileManager); |
| } |
| |
| @Override |
| public JavaFileObject getJavaFileForOutput(Location location, String className, JavaFileObject.Kind kind, FileObject sibling) throws IOException { |
| |
| InMemoryJavaFile javaFile = new InMemoryJavaFile(className); |
| classes.put(className, javaFile); |
| return javaFile; |
| } |
| |
| @Override |
| public ClassLoader getClassLoader(Location location) { |
| return new ClassLoader(this.getClass().getClassLoader()) { |
| @Override |
| protected Class<?> findClass(String name) throws ClassNotFoundException { |
| InMemoryJavaFile classData = classes.get(name); |
| if (classData == null) throw new ClassNotFoundException(name); |
| byte[] byteCode = classData.bos.toByteArray(); |
| return defineClass(name, byteCode, 0, byteCode.length); |
| } |
| }; |
| } |
| |
| public Map<String, ? extends JavaFileObject> getClasses() { |
| return unmodifiableMap(classes); |
| } |
| |
| private static class InMemoryJavaFile extends SimpleJavaFileObject { |
| |
| private final ByteArrayOutputStream bos = |
| new ByteArrayOutputStream(); |
| |
| |
| protected InMemoryJavaFile(String name) { |
| super(URI.create("mfm:///" + name.replace('.', '/') + Kind.CLASS.extension), Kind.CLASS); |
| } |
| |
| @Override |
| public OutputStream openOutputStream() throws IOException { |
| return bos; |
| } |
| |
| @Override |
| public InputStream openInputStream() throws IOException { |
| return new ByteArrayInputStream(bos.toByteArray()); |
| } |
| } |
| } |