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Java example source code file (MemoryClassLoader.java)
The MemoryClassLoader.java Java example source code/* * Copyright (c) 2008, 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.ByteArrayOutputStream; import java.net.URI; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.tools.FileObject; import javax.tools.ForwardingJavaFileManager; import javax.tools.JavaCompiler; import javax.tools.JavaFileManager; import javax.tools.JavaFileObject.Kind; import javax.tools.SimpleJavaFileObject; import javax.tools.ToolProvider; public final class MemoryClassLoader extends ClassLoader { private final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); private final MemoryFileManager manager = new MemoryFileManager(this.compiler); public Class<?> compile(String name, String content) { compile(new Source(name, content)); try { return findClass(name); } catch (ClassNotFoundException exception) { throw new Error(exception); } } public void compile(Source... sources) { List<Source> list = new ArrayList(); if (sources != null) { for (Source source : sources) { if (source != null) { list.add(source); } } } synchronized (this.manager) { this.compiler.getTask(null, this.manager, null, null, null, list).call(); } } @Override protected Class<?> findClass(String name) throws ClassNotFoundException { synchronized (this.manager) { Output mc = this.manager.map.remove(name); if (mc != null) { byte[] array = mc.toByteArray(); return defineClass(name, array, 0, array.length); } } return super.findClass(name); } private static final class MemoryFileManager extends ForwardingJavaFileManager<JavaFileManager> { private final Map<String, Output> map = new HashMap Other Java examples (source code examples)Here is a short list of links related to this Java MemoryClassLoader.java source code file: |
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