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1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.tools.layoutlib.create;
18
19import com.android.tools.layoutlib.create.ICreateInfo.InjectMethodRunnable;
20
21import org.objectweb.asm.ClassVisitor;
22import org.objectweb.asm.MethodVisitor;
23
24import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
25import static org.objectweb.asm.Opcodes.ALOAD;
26import static org.objectweb.asm.Opcodes.ARETURN;
27import static org.objectweb.asm.Opcodes.INVOKEVIRTUAL;
28
29public class InjectMethodRunnables {
30    public static final ICreateInfo.InjectMethodRunnable CONTEXT_GET_FRAMEWORK_CLASS_LOADER
31            = new InjectMethodRunnable() {
32        @Override
33        public void generateMethods(Object classVisitor) {
34            assert classVisitor instanceof ClassVisitor;
35            ClassVisitor cv = (ClassVisitor) classVisitor;
36            // generated by compiling the class:
37            // class foo { public ClassLoader getFrameworkClassLoader() { return getClass().getClassLoader(); } }
38            // and then running ASMifier on it:
39            // java -classpath asm-debug-all-5.0.2.jar:. org.objectweb.asm.util.ASMifier foo
40            MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "getFrameworkClassLoader",
41                    "()Ljava/lang/ClassLoader;", null, null);
42            mv.visitCode();
43            mv.visitVarInsn(ALOAD, 0);
44            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass",
45                    "()Ljava/lang/Class;", false);
46            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getClassLoader",
47                    "()Ljava/lang/ClassLoader;", false);
48            mv.visitInsn(ARETURN);
49            mv.visitMaxs(1, 1);
50            mv.visitEnd();
51            // generated code ends.
52        }
53    };
54}
55