List of usage examples for org.aspectj.apache.bcel.classfile ConstantUtf8 ConstantUtf8
public ConstantUtf8(String string)
From source file:org.caesarj.mixer.intern.ClassModifyingVisitor.java
License:Open Source License
protected JavaClass transform(JavaClass clazz) throws MixerException { // empty collection of anonymous inner classes anonymousInners = new Vector<String>(); oldOuterClassName = Tools.getOuterClass(clazz, oldClassName); oldSuperclassName = clazz.getSuperclassName(); // create a copy as work base JavaClass newClass = clazz.copy();//from ww w .j av a 2s .c om // find indices of class and super class name int classNameIndex = newClass.getClassNameIndex(), superclassNameIndex = newClass.getSuperclassNameIndex(); ConstantClass cc = (ConstantClass) newClass.getConstantPool().getConstant(classNameIndex), csc = (ConstantClass) newClass.getConstantPool().getConstant(superclassNameIndex); classNameIndex = cc.getNameIndex(); superclassNameIndex = csc.getNameIndex(); // Set new class & superclass name newClass.getConstantPool().setConstant(superclassNameIndex, new ConstantUtf8(newSuperclassName)); newClass.getConstantPool().setConstant(classNameIndex, new ConstantUtf8(newClassName)); // visit fields, methods and local variables to replace type references new DescendingVisitor(newClass, this).visit(); // Delete all inner class references Attribute[] atts = newClass.getAttributes(); Vector<Attribute> v = new Vector<Attribute>(); for (int i = 0; i < atts.length; i++) { Attribute attribute = atts[i]; if (attribute.getTag() == Constants.ATTR_INNER_CLASSES) { InnerClasses ic = (InnerClasses) attribute; ic.setInnerClasses(new InnerClass[0]); ic.setLength(2); } v.add(attribute); } atts = v.toArray(new Attribute[v.size()]); newClass.setAttributes(atts); newClass = removeFactoryMethods(newClass); // Mixin classes must be abstract, because they do not implement factory methods, // (if the class is final => it was a anonymous inner class) if (!newClass.isFinal()) { newClass.setAccessFlags(newClass.getAccessFlags() | Constants.ACC_ABSTRACT); } // take a look at all methodrefs modifyMethodAndFieldRefs(newClass); // return generated class return newClass; }
From source file:org.caesarj.mixer.intern.ClassModifyingVisitor.java
License:Open Source License
/** * Checks method references to super-constructors and outerclass methods * and modifies them to refer to the correct new outer classes. *///from w w w . ja v a 2 s.c om protected void modifyMethodAndFieldRefs(JavaClass clazz) { ConstantPool cp = clazz.getConstantPool(); for (int i = 1; i < cp.getLength(); i++) { Constant c = cp.getConstant(i); if (c == null) continue; if (c.getTag() == Constants.CONSTANT_Fieldref) { ConstantFieldref fieldRef = (ConstantFieldref) c; String targetClass = fieldRef.getClass(cp); if (Tools.sameClass(targetClass, oldOuterClassName)) { int classIndex = fieldRef.getClassIndex(); ConstantClass cc = (ConstantClass) cp.getConstant(classIndex); int nameIndex = cc.getNameIndex(); cp.setConstant(nameIndex, new ConstantUtf8(newOuterClassName)); } } else if (c.getTag() == Constants.CONSTANT_Methodref) { ConstantMethodref mr = (ConstantMethodref) c; String targetClassName = mr.getClass(cp); int nameAndTypeIndex = mr.getNameAndTypeIndex(); ConstantNameAndType nat = ((ConstantNameAndType) cp.getConstant(nameAndTypeIndex)); String methodName = nat.getName(cp); // check for innerclass construction if (Tools.isPrefix(oldClassName, targetClassName)) { String innerIdent = targetClassName.substring(oldClassName.length() + 1); String newInnerName = newClassName + "$" + innerIdent; try { Integer.parseInt(innerIdent); } catch (Exception e) { // not an anonymous inner class continue; } // Change target class to new inner class int targetClassIndex = mr.getClassIndex(); int targetNameIndex = ((ConstantClass) cp.getConstant(targetClassIndex)).getNameIndex(); cp.setConstant(targetNameIndex, new ConstantUtf8(newInnerName)); // Change argument class to new class Type[] args = Type.getArgumentTypes(nat.getSignature(cp)); for (int j = 0; j < args.length; j++) { Type arg = args[j]; String signature = arg.getSignature(); String argumentType = arg.toString(); if (Tools.sameClass(argumentType, oldClassName)) { args[j] = Type.getType("L" + newClassName + ";"); } } String signature = Type.getMethodSignature(Type.getReturnType(nat.getSignature(cp)), args); int signatureIndex = nat.getSignatureIndex(); cp.setConstant(signatureIndex, new ConstantUtf8(signature)); } // Check for superconstructor calls with otuer class parameter if (Tools.sameClass(targetClassName, newSuperclassName)) { if (methodName.equals("<init>")) { Type[] args = Type.getArgumentTypes(nat.getSignature(cp)); if (args.length == 1) { String argumentType = args[0].toString(); // if parameter is of old super-outer-class type, set new signature if (Tools.sameClass(argumentType, outerOfOldSuper)) { cp.setConstant(nat.getSignatureIndex(), new ConstantUtf8("(L" + outerOfNewSuper + ";)V")); } } } } // check whether its a call to our old outer class if (Tools.isPrefix(targetClassName, oldOuterClassName)) { // String newTargetClass = Tools.getNewOuterName( // oldClassName, // targetClassName, // outerClasses); int classIndex = mr.getClassIndex(); ConstantClass cc = (ConstantClass) cp.getConstant(classIndex); int nameIndex = cc.getNameIndex(); cp.setConstant(nameIndex, new ConstantUtf8(newOuterClassName)); } } } }
From source file:org.caesarj.mixer.intern.ClassModifyingVisitor.java
License:Open Source License
public void visitLocalVariable(LocalVariable variable) { // Change the type of the local variable this if (variable.getName().equals("this")) { int index = variable.getSignatureIndex(); ConstantPool cp = variable.getConstantPool(); Constant newSignature = new ConstantUtf8(new ObjectType(newClassName).getSignature()); cp.setConstant(index, newSignature); }/*w w w .ja va2s . co m*/ super.visitLocalVariable(variable); }
From source file:org.caesarj.mixer.intern.ClassModifyingVisitor.java
License:Open Source License
public void visitField(Field field) { // and of outer this if (field.getName().startsWith("this$")) { int index = field.getSignatureIndex(); ConstantPool cp = field.getConstantPool(); Constant newSignature = new ConstantUtf8(new ObjectType(newOuterClassName).getSignature()); cp.setConstant(index, newSignature); }/* w ww . ja va 2s .c o m*/ super.visitField(field); }
From source file:org.caesarj.mixer.intern.ClassModifyingVisitor.java
License:Open Source License
public void visitMethod(Method method) { final ConstantPool cp = method.getConstantPool(); // we search for outer-class-access functions, which // are static, have exactly one argument of this class' type and // return an instance of the outer class' type if (method.isStatic() && method.getName().startsWith("access$")) { String returnType = Type.getReturnType(method.getSignature()).toString(); if (!Tools.sameClass(returnType, oldOuterClassName)) return; Type[] argTypes = Type.getArgumentTypes(method.getSignature()); if (argTypes.length != 1) return; // construct the new signature & use it to overwrite the old one String newSignature = "(L" + newClassName + ";)L" + newOuterClassName + ";"; int index = method.getSignatureIndex(); cp.setConstant(index, new ConstantUtf8(newSignature)); }/* w ww . jav a 2s. co m*/ // and we check for constructors else if (method.getName().equals("<init>")) { Type[] argTypes = Type.getArgumentTypes(method.getSignature()); for (int argIdx = 0; argIdx < argTypes.length; argIdx++) { // modify the signature if neccessary if (Tools.sameClass(argTypes[argIdx].toString(), oldOuterClassName)) { // construct the new signature and use it to overwrite the old one argTypes[argIdx] = Type.getType("L" + newOuterClassName + ";"); } } // construct new signature String signature = Type.getMethodSignature(method.getReturnType(), argTypes); int signatureIndex = method.getSignatureIndex(); cp.setConstant(signatureIndex, new ConstantUtf8(signature)); } }