org.jetbrains.jet.cli.jvm.repl.ReplClassLoader Maven / Gradle / Ivy
/*
* Copyright 2010-2013 JetBrains s.r.o.
*
* Licensed 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.jetbrains.jet.cli.jvm.repl;
import com.google.common.collect.Maps;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.jet.lang.resolve.java.JvmClassName;
import org.jetbrains.org.objectweb.asm.ClassReader;
import org.jetbrains.org.objectweb.asm.util.TraceClassVisitor;
import java.io.PrintWriter;
import java.util.Map;
public class ReplClassLoader extends ClassLoader {
private Map classes = Maps.newLinkedHashMap();
public ReplClassLoader(@NotNull ClassLoader parent) {
super(parent);
}
public ReplClassLoader() {
}
@Override
protected Class findClass(String name) throws ClassNotFoundException {
byte[] classBytes = classes.get(JvmClassName.byFqNameWithoutInnerClasses(name));
if (classBytes != null) {
return defineClass(name, classBytes, 0, classBytes.length);
}
else {
return super.findClass(name);
}
}
public void addClass(@NotNull JvmClassName className, @NotNull byte[] bytes) {
byte[] oldBytes = classes.put(className, bytes);
if (oldBytes != null) {
throw new IllegalStateException("Rewrite at key " + className);
}
}
public void dumpClasses(@NotNull PrintWriter writer) {
for (byte[] classBytes : classes.values()) {
new ClassReader(classBytes).accept(new TraceClassVisitor(writer), 0);
}
}
}