/** Returns a shrunk descriptor or signature of the given method. */
private String shrinkDescriptor(Method method, String descriptor) {
// All parameters of non-static methods are shifted by one in the local
// variable frame.
int parameterIndex =
(method.getAccessFlags() & ClassConstants.INTERNAL_ACC_STATIC) != 0 ? 0 : 1;
// Go over the parameters.
InternalTypeEnumeration internalTypeEnumeration = new InternalTypeEnumeration(descriptor);
StringBuffer newDescriptorBuffer = new StringBuffer();
newDescriptorBuffer.append(internalTypeEnumeration.formalTypeParameters());
newDescriptorBuffer.append(ClassConstants.INTERNAL_METHOD_ARGUMENTS_OPEN);
while (internalTypeEnumeration.hasMoreTypes()) {
String type = internalTypeEnumeration.nextType();
if (ParameterUsageMarker.isParameterUsed(method, parameterIndex)) {
newDescriptorBuffer.append(type);
} else if (DEBUG) {
System.out.println(" Deleting parameter #" + parameterIndex + " [" + type + "]");
}
parameterIndex += ClassUtil.isInternalCategory2Type(type) ? 2 : 1;
}
newDescriptorBuffer.append(ClassConstants.INTERNAL_METHOD_ARGUMENTS_CLOSE);
newDescriptorBuffer.append(internalTypeEnumeration.returnType());
return newDescriptorBuffer.toString();
}
/** Shrinks the array of referenced classes of the given method. */
private Clazz[] shrinkReferencedClasses(
Method method, String descriptor, Clazz[] referencedClasses) {
if (referencedClasses != null) {
// All parameters of non-static methods are shifted by one in the local
// variable frame.
int parameterIndex =
(method.getAccessFlags() & ClassConstants.INTERNAL_ACC_STATIC) != 0 ? 0 : 1;
int referencedClassIndex = 0;
int newReferencedClassIndex = 0;
// Go over the parameters.
InternalTypeEnumeration internalTypeEnumeration = new InternalTypeEnumeration(descriptor);
// Also look at the formal type parameters.
String type = internalTypeEnumeration.formalTypeParameters();
int count = new DescriptorClassEnumeration(type).classCount();
for (int counter = 0; counter < count; counter++) {
referencedClasses[newReferencedClassIndex++] = referencedClasses[referencedClassIndex++];
}
while (internalTypeEnumeration.hasMoreTypes()) {
// Consider the classes referenced by this parameter type.
type = internalTypeEnumeration.nextType();
count = new DescriptorClassEnumeration(type).classCount();
if (ParameterUsageMarker.isParameterUsed(method, parameterIndex)) {
// Copy the referenced classes.
for (int counter = 0; counter < count; counter++) {
referencedClasses[newReferencedClassIndex++] =
referencedClasses[referencedClassIndex++];
}
} else {
// Skip the referenced classes.
referencedClassIndex += count;
}
parameterIndex += ClassUtil.isInternalCategory2Type(type) ? 2 : 1;
}
// Also look at the return value.
type = internalTypeEnumeration.returnType();
count = new DescriptorClassEnumeration(type).classCount();
for (int counter = 0; counter < count; counter++) {
referencedClasses[newReferencedClassIndex++] = referencedClasses[referencedClassIndex++];
}
// Clear the unused entries.
while (newReferencedClassIndex < referencedClassIndex) {
referencedClasses[newReferencedClassIndex++] = null;
}
}
return referencedClasses;
}