| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.flink.testutils; |
| |
| import javax.tools.JavaCompiler; |
| import javax.tools.ToolProvider; |
| |
| import java.io.File; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| |
| /** |
| * Utilities to create class loaders. |
| */ |
| public class ClassLoaderUtils { |
| public static URLClassLoader compileAndLoadJava(File root, String filename, String source) throws |
| IOException { |
| File file = writeSourceFile(root, filename, source); |
| |
| compileClass(file); |
| |
| return new URLClassLoader( |
| new URL[]{root.toURI().toURL()}, |
| Thread.currentThread().getContextClassLoader()); |
| } |
| |
| private static File writeSourceFile(File root, String filename, String source) throws IOException { |
| File file = new File(root, filename); |
| FileWriter fileWriter = new FileWriter(file); |
| |
| fileWriter.write(source); |
| fileWriter.close(); |
| |
| return file; |
| } |
| |
| private static int compileClass(File sourceFile) { |
| JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); |
| return compiler.run(null, null, null, "-proc:none", sourceFile.getPath()); |
| } |
| } |