/*
* 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.classinfo;
import java.util.ArrayList;
import java.util.List;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.pitest.bytecode.NullVisitor;
public final class ClassInfoVisitor extends MethodFilteringAdapter {
private final ClassInfoBuilder classInfo;
private ClassInfoVisitor(final ClassInfoBuilder classInfo,
final ClassVisitor writer) {
super(writer, BridgeMethodFilter.INSTANCE);
this.classInfo = classInfo;
}
public static ClassInfoBuilder getClassInfo(final ClassName name,
final byte[] bytes, final long hash) {
final ClassReader reader = new ClassReader(bytes);
final ClassVisitor writer = new NullVisitor();
final ClassInfoBuilder info = new ClassInfoBuilder();
info.id = new ClassIdentifier(hash, name);
reader.accept(new ClassInfoVisitor(info, writer), 0);
return info;
}
@Override
public void visitSource(final String source, final String debug) {
super.visitSource(source, debug);
this.classInfo.sourceFile = source;
}
@Override
public void visit(final int version, final int access, final String name,
final String signature, final String superName, final String[] interfaces) {
super.visit(version, access, name, signature, superName, interfaces);
this.classInfo.access = access;
this.classInfo.superClass = superName;
}
@Override
public void visitOuterClass(final String owner, final String name,
final String desc) {
super.visitOuterClass(owner, name, desc);
this.classInfo.outerClass = owner;
}
@Override
public void visitInnerClass(final String name, final String outerName,
final String innerName, final int access) {
super.visitInnerClass(name, outerName, innerName, access);
if ((outerName != null)
&& this.classInfo.id.getName().equals(new ClassName(name))) {
this.classInfo.outerClass = outerName;
}
}
@Override
public AnnotationVisitor visitAnnotation(final String desc,
final boolean visible) {
final String type = desc.substring(1, desc.length() - 1);
this.classInfo.registerAnnotation(type);
return new ClassAnnotationValueVisitor(this.classInfo, new ClassName(type));
}
@Override
public MethodVisitor visitMethodIfRequired(final int access,
final String name, final String desc, final String signature,
final String[] exceptions, final MethodVisitor methodVisitor) {
return new InfoMethodVisitor(this.classInfo, methodVisitor);
}
private static class ClassAnnotationValueVisitor extends AnnotationVisitor {
private final ClassInfoBuilder classInfo;
private final ClassName annotation;
ClassAnnotationValueVisitor(ClassInfoBuilder classInfo,
ClassName annotation) {
super(Opcodes.ASM5, null);
this.classInfo = classInfo;
this.annotation = annotation;
}
@Override
public void visit(String name, Object value) {
if (name.equals("value")) {
this.classInfo.registerClassAnnotationValue(this.annotation,
simplify(value));
}
super.visit(name, value);
}
@Override
public AnnotationVisitor visitArray(String name) {
if (name.equals("value")) {
final List<Object> arrayValue = new ArrayList<Object>();
return new AnnotationVisitor(Opcodes.ASM5, null) {
@Override
public void visit(String name, Object value) {
arrayValue.add(simplify(value));
super.visit(name, value);
}
@Override
public void visitEnd() {
ClassAnnotationValueVisitor.this.classInfo
.registerClassAnnotationValue(
ClassAnnotationValueVisitor.this.annotation,
arrayValue.toArray());
}
};
}
return super.visitArray(name);
}
private static Object simplify(Object value) {
Object newValue = value;
if (value instanceof Type) {
newValue = ((Type) value).getClassName();
}
return newValue;
}
}
}
class InfoMethodVisitor extends MethodVisitor {
private final ClassInfoBuilder classInfo;
InfoMethodVisitor(final ClassInfoBuilder classInfo,
final MethodVisitor writer) {
super(Opcodes.ASM5, writer);
this.classInfo = classInfo;
}
@Override
public void visitLineNumber(final int line, final Label start) {
this.classInfo.registerCodeLine(line);
}
@Override
public AnnotationVisitor visitAnnotation(final String desc,
final boolean visible) {
final String type = desc.substring(1, desc.length() - 1);
this.classInfo.registerAnnotation(type);
return super.visitAnnotation(desc, visible);
}
}