org.pitest.mutationtest.mocksupport.JavassistInputStreamInterceptorAdapater.java Source code

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Here is the source code for org.pitest.mutationtest.mocksupport.JavassistInputStreamInterceptorAdapater.java

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/*
 * Copyright 2010 Henry Coles
 * 
 * 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.pitest.mutationtest.mocksupport;

import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

public class JavassistInputStreamInterceptorAdapater extends ClassVisitor {

    public JavassistInputStreamInterceptorAdapater(final ClassVisitor arg0) {
        super(Opcodes.ASM5, arg0);
    }

    @Override
    public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature,
            final String[] exceptions) {
        return new JavassistInputStreamInterceptorMethodVisitor(
                this.cv.visitMethod(access, name, desc, signature, exceptions));
    }

}

class JavassistInputStreamInterceptorMethodVisitor extends MethodVisitor {

    private static final String INTERCEPTOR_CLASS = classToName(JavassistInterceptor.class);

    public JavassistInputStreamInterceptorMethodVisitor(final MethodVisitor mv) {
        super(Opcodes.ASM5, mv);
    }

    @Override
    public void visitMethodInsn(final int opcode, final String owner, final String name, final String desc,
            boolean itf) {
        if ((opcode == Opcodes.INVOKEINTERFACE) && owner.equals("javassist/ClassPath")
                && name.equals("openClassfile")) {
            this.mv.visitMethodInsn(Opcodes.INVOKESTATIC, INTERCEPTOR_CLASS, name,
                    "(Ljava/lang/Object;Ljava/lang/String;)Ljava/io/InputStream;", false);
        } else {
            this.mv.visitMethodInsn(opcode, owner, name, desc, itf);
        }

    }

    private static String classToName(final Class<?> clazz) {
        return clazz.getName().replace(".", "/");
    }

}