List<String> parameterTypenames = Type.parseMethodDescriptor(descriptor, true);
int parameterCount = parameterTypenames.size() - 1; // allows for return type
// make sure all entries are valid
while (bindingIter.hasNext()) {
Binding binding = bindingIter.next();
if (binding.isRecipient()) {
if ((access & Opcodes.ACC_STATIC) != 0) {
if (Transformer.isVerbose()) {
System.out.println("RuleCheckMethodAdapter.checkBindings : found invalid recipient binding " + binding + " checking static method " + name + descriptor);
}
return false;
}
} else if (binding.isParam()) {
int idx = binding.getIndex();
if (idx > parameterCount) {
// parameter out of range
if (Transformer.isVerbose()) {
System.out.println("RuleCheckMethodAdapter.checkBindings : found out of range parameter binding " + binding + " checking method " + name + descriptor);
}
return false;
} else {
binding.setDescriptor(parameterTypenames.get(idx - 1));
}
} else if (binding.isReturn()) {
// at some point we will allow reference to the current return value so we need
// to be sure that the method has a non-void return type
if (rule.getTargetLocation().getLocationType() != LocationType.EXIT) {
System.out.println("RuleCheckMethodAdapter.checkBindings : found return value binding $! in non-EXIT rule " + rule.getName());
return false;
}
} else if (binding.isThrowable()) {
// we can only allow reference to the current throwable in an AT THROW rule
if (rule.getTargetLocation().getLocationType() != LocationType.THROW) {
System.out.println("RuleCheckMethodAdapter.checkBindings : found throwable value binding $^ in non-THROW rule " + rule.getName());
return false;
}
// we will need to set the descriptor at some point
} else if (binding.isParamArray()) {
// this is ok
} else if (binding.isParamCount()) {
// this is ok
} else if (binding.isInvokeParamArray()) {
// we can only allow reference to the invoked method parameters in an AT INVOKE rule
if (rule.getTargetLocation().getLocationType() != LocationType.INVOKE) {
System.out.println("RuleCheckMethodAdapter.checkBindings : found invoke parameter array binding $@ in non-AT INVOKE rule " + rule.getName());
return false;
}
} else if (binding.isLocalVar()){
// make sure we have a local variable with the correct name
String localVarName = binding.getName().substring(1);
List<LocalVar> localVars = lookup(localVarName);
if (localVars == null || localVars.isEmpty()) {
if (Transformer.isVerbose()) {
System.out.println("RuleCheckMethodAdapter.checkBindings : unknown local variable binding " + binding + " checking method " + name + descriptor);
}
return false;
} else {
String descriptor = null;
int index = -1;
Iterator<Label> labelIter = triggerPoints.iterator();
while (labelIter.hasNext()) {
int triggerPos = labelIter.next().getOffset();
boolean found = false;
Iterator<LocalVar> localVarIter = localVars.iterator();
while (localVarIter.hasNext()) {
LocalVar localVar = localVarIter.next();
int start = localVar.start.getOffset();
int end = localVar.end.getOffset();
if (start <= triggerPos && triggerPos < end) {
// only accept if the descriptor and index are the same or are not yet set
if (descriptor == null && index == -1) {
descriptor = localVar.desc;
index = localVar.index;
found = true;
} else if (descriptor.equals(localVar.desc) && index == localVar.index) {
found = true;
}
// terminate the loop here
break;
}
}
// if there was no variable for this trigger point then fail
if (!found) {
if (Transformer.isVerbose()) {
System.out.println("RuleCheckMethodAdapter.checkBindings : invalid local variable binding " + binding + " checking method " + name + descriptor);
}
return false;
}
}
// if we got here then we have a unique local var descriptor and index for
// all trigger points so update the binding
binding.setDescriptor(Type.parseFieldDescriptor(descriptor));
binding.setLocalIndex(index);
}
}
}
// ok all local vars and params are accounted for so return true