001    /*
002     * Copyright 2010-2015 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.kotlin.codegen;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.backend.common.output.OutputFile;
021    
022    import java.io.ByteArrayInputStream;
023    import java.io.InputStream;
024    import java.net.URL;
025    import java.net.URLClassLoader;
026    import java.util.List;
027    import java.util.jar.Manifest;
028    
029    public class GeneratedClassLoader extends URLClassLoader {
030        private ClassFileFactory factory;
031    
032        public GeneratedClassLoader(@NotNull ClassFileFactory factory, ClassLoader parentClassLoader, URL... urls) {
033            super(urls, parentClassLoader);
034            this.factory = factory;
035        }
036    
037        @Override
038        public InputStream getResourceAsStream(String name) {
039            OutputFile outputFile = factory.get(name);
040            if (outputFile != null) {
041                return new ByteArrayInputStream(outputFile.asByteArray());
042            }
043            return super.getResourceAsStream(name);
044        }
045    
046        @NotNull
047        @Override
048        protected Class<?> findClass(@NotNull String name) throws ClassNotFoundException {
049            String classFilePath = name.replace('.', '/') + ".class";
050    
051            OutputFile outputFile = factory.get(classFilePath);
052            if (outputFile != null) {
053                byte[] bytes = outputFile.asByteArray();
054                int lastDot = name.lastIndexOf('.');
055                if (lastDot >= 0) {
056                    String pkgName = name.substring(0, lastDot);
057                    if (getPackage(pkgName) == null) {
058                        definePackage(pkgName, new Manifest(), null);
059                    }
060                }
061                return defineClass(name, bytes, 0, bytes.length);
062            }
063    
064            return super.findClass(name);
065        }
066    
067        public void dispose() {
068            factory = null;
069        }
070    
071        @NotNull
072        public List<OutputFile> getAllGeneratedFiles() {
073            return factory.asList();
074        }
075    }