use of jodd.asm5.FieldVisitor in project jodd by oblac.
the class ProxyAspectData method readAdviceData.
// ---------------------------------------------------------------- read
/**
* Parse advice class to gather some advice data. Should be called before any advice use.
* Must be called only *once* per advice.
*/
private void readAdviceData() {
if (ready) {
return;
}
adviceClassReader.accept(new EmptyClassVisitor() {
/**
* Stores advice reference.
*/
@Override
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
adviceReference = name;
super.visit(version, access, name, signature, superName, interfaces);
}
/**
* Prevents advice to have inner classes.
*/
@Override
public void visitInnerClass(String name, String outerName, String innerName, int access) {
if (outerName.equals(adviceReference)) {
throw new ProxettaException("Proxetta doesn't allow inner classes in/for advice: " + advice.getName());
}
super.visitInnerClass(name, outerName, innerName, access);
}
/**
* Clones advices fields to destination.
*/
@Override
public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
// [A5]
wd.dest.visitField(access, adviceFieldName(name, aspectIndex), desc, signature, value);
return super.visitField(access, name, desc, signature, value);
}
/**
* Copies advices methods to destination.
*/
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
if (name.equals(CLINIT)) {
// [A6]
if (!desc.equals(DESC_VOID)) {
throw new ProxettaException("Invalid static initialization block description for advice: " + advice.getName());
}
name = clinitMethodName + methodDivider + aspectIndex;
access |= AsmUtil.ACC_PRIVATE | AsmUtil.ACC_FINAL;
wd.addAdviceClinitMethod(name);
return new MethodAdapter(wd.dest.visitMethod(access, name, desc, signature, exceptions)) {
@Override
public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
}
@Override
public void visitLineNumber(int line, Label start) {
}
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean isInterface) {
if (opcode == INVOKESTATIC) {
if (owner.equals(adviceReference)) {
owner = wd.thisReference;
name = adviceMethodName(name, aspectIndex);
}
}
super.visitMethodInsn(opcode, owner, name, desc, isInterface);
}
@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
// [F6]
if (owner.equals(adviceReference)) {
// [F5]
owner = wd.thisReference;
name = adviceFieldName(name, aspectIndex);
}
super.visitFieldInsn(opcode, owner, name, desc);
}
};
} else if (name.equals(INIT)) {
// [A7]
if (!desc.equals(DESC_VOID)) {
throw new ProxettaException("Advices can have only default constructors. Invalid advice: " + advice.getName());
}
name = initMethodName + methodDivider + aspectIndex;
access = ProxettaAsmUtil.makePrivateFinalAccess(access);
wd.addAdviceInitMethod(name);
return new MethodAdapter(wd.dest.visitMethod(access, name, desc, signature, exceptions)) {
@Override
public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
}
@Override
public void visitLineNumber(int line, Label start) {
}
// used to detect and to ignore the first super call()
int state;
@Override
public void visitVarInsn(int opcode, int var) {
// [F7]
if ((state == 0) && (opcode == ALOAD) && (var == 0)) {
state++;
return;
}
super.visitVarInsn(opcode, var);
}
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean isInterface) {
if ((state == 1) && (opcode == INVOKESPECIAL)) {
state++;
return;
}
if ((opcode == INVOKEVIRTUAL) || (opcode == INVOKEINTERFACE)) {
if (owner.equals(adviceReference)) {
owner = wd.thisReference;
name = adviceMethodName(name, aspectIndex);
}
} else if (opcode == INVOKESTATIC) {
if (owner.equals(adviceReference)) {
owner = wd.thisReference;
name = adviceMethodName(name, aspectIndex);
}
}
super.visitMethodInsn(opcode, owner, name, desc, isInterface);
}
@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
// [F7]
if (owner.equals(adviceReference)) {
// [F5]
owner = wd.thisReference;
name = adviceFieldName(name, aspectIndex);
}
super.visitFieldInsn(opcode, owner, name, desc);
}
};
} else // other methods
if (!name.equals(executeMethodName)) {
name = adviceMethodName(name, aspectIndex);
return new MethodAdapter(wd.dest.visitMethod(access, name, desc, signature, exceptions)) {
@Override
public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
}
@Override
public void visitLineNumber(int line, Label start) {
}
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean isInterface) {
if ((opcode == INVOKEVIRTUAL) || (opcode == INVOKEINTERFACE)) {
if (owner.equals(adviceReference)) {
owner = wd.thisReference;
name = adviceMethodName(name, aspectIndex);
}
} else if (opcode == INVOKESTATIC || opcode == INVOKESPECIAL) {
if (owner.equals(adviceReference)) {
owner = wd.thisReference;
name = adviceMethodName(name, aspectIndex);
}
}
super.visitMethodInsn(opcode, owner, name, desc, isInterface);
}
@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
// replace field references
if (owner.equals(adviceReference)) {
owner = wd.thisReference;
name = adviceFieldName(name, aspectIndex);
}
super.visitFieldInsn(opcode, owner, name, desc);
}
};
}
//return new MethodAdapter(new EmptyMethodVisitor()) { // toask may we replace this with the following code?
return new EmptyMethodVisitor() {
@Override
public void visitVarInsn(int opcode, int var) {
if (isStoreOpcode(opcode)) {
if (var > maxLocalVarOffset) {
// find max local var offset
maxLocalVarOffset = var;
}
}
super.visitVarInsn(opcode, var);
}
};
// return super.visitMethod(access, name, desc, signature, exceptions);
}
}, 0);
// increment offset by 2 because var on last index may be a dword value
maxLocalVarOffset += 2;
ready = true;
}
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