public boolean checkAccess() {
ClassInfo clazzInfo = method.getClazzInfo();
BytecodeInfo bytecode = method.getBytecode();
Handler[] excHandlers = bytecode.getExceptionHandlers();
boolean dupSeen = false;
if (excHandlers != null && excHandlers.length != 0) return false;
if (method.isStatic()) {
if (checkStaticAccess()) return true;
}
Iterator iter = bytecode.getInstructions().iterator();
Instruction instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
if (instr.getOpcode() != opc_aload || instr.getLocalSlot() != 0) return false;
instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
if (instr.getOpcode() == opc_getfield) {
Reference ref = instr.getReference();
ClassInfo refClazz = TypeSignature.getClassInfo(ref.getClazz());
if (!refClazz.superClassOf(clazzInfo)) return false;
FieldInfo refField = refClazz.findField(ref.getName(), ref.getType());
if ((refField.getModifiers() & modifierMask) != 0) return false;
instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
if (instr.getOpcode() < opc_ireturn || instr.getOpcode() > opc_areturn) return false;
/* For valid bytecode the type matches automatically */
reference = ref;
kind = ACCESSGETFIELD;
return true;
}
int params = 0, slot = 1;
while (instr.getOpcode() >= opc_iload
&& instr.getOpcode() <= opc_aload
&& instr.getLocalSlot() == slot) {
params++;
slot += (instr.getOpcode() == opc_lload || instr.getOpcode() == opc_dload) ? 2 : 1;
instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
}
if (instr.getOpcode() == (opc_dup_x1 - 6) + 3 * slot) {
/*
* This is probably a opc_dup_x1 or opc_dup2_x1, preceding a
* opc_putfield
*/
instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
if (instr.getOpcode() != opc_putfield) return false;
dupSeen = true;
}
if (instr.getOpcode() == opc_putfield) {
if (params != 1) return false;
/* For valid bytecode the type of param matches automatically */
Reference ref = instr.getReference();
ClassInfo refClazz = TypeSignature.getClassInfo(ref.getClazz());
if (!refClazz.superClassOf(clazzInfo)) return false;
FieldInfo refField = refClazz.findField(ref.getName(), ref.getType());
if ((refField.getModifiers() & modifierMask) != 0) return false;
instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
if (dupSeen) {
if (instr.getOpcode() < opc_ireturn || instr.getOpcode() > opc_areturn) return false;
kind = ACCESSDUPPUTFIELD;
} else {
if (instr.getOpcode() != opc_return) return false;
kind = ACCESSPUTFIELD;
}
reference = ref;
return true;
}
if (instr.getOpcode() == opc_invokespecial) {
Reference ref = instr.getReference();
ClassInfo refClazz = TypeSignature.getClassInfo(ref.getClazz());
if (!refClazz.superClassOf(clazzInfo)) return false;
MethodInfo refMethod = refClazz.findMethod(ref.getName(), ref.getType());
MethodType refType = Type.tMethod(ref.getType());
if ((refMethod.getModifiers() & modifierMask) != 0
|| refType.getParameterTypes().length != params) return false;
instr = (Instruction) iter.next();
while (instr.getOpcode() == opc_nop && iter.hasNext()) instr = (Instruction) iter.next();
if (refType.getReturnType() == Type.tVoid) {
if (instr.getOpcode() != opc_return) return false;
} else {
if (instr.getOpcode() < opc_ireturn || instr.getOpcode() > opc_areturn) return false;
}
/* For valid bytecode the types matches automatically */
reference = ref;
kind = ACCESSMETHOD;
return true;
}
return false;
}