@Override
public Size apply(
MethodVisitor methodVisitor,
Context implementationContext,
MethodDescription instrumentedMethod) {
StackManipulation thisReference =
MethodVariableAccess.forType(instrumentedType).loadOffset(0);
FieldList<?> fieldList = instrumentedType.getDeclaredFields();
StackManipulation[] fieldLoading = new StackManipulation[fieldList.size()];
int index = 0;
for (FieldDescription fieldDescription : fieldList) {
fieldLoading[index++] =
new StackManipulation.Compound(
thisReference, FieldAccess.forField(fieldDescription).getter());
}
StackManipulation.Size stackSize =
new StackManipulation.Compound(
new StackManipulation.Compound(fieldLoading),
MethodInvocation.invoke(accessorMethod),
assigner.assign(
accessorMethod.getReturnType().asErasure(),
instrumentedMethod.getReturnType().asErasure(),
Assigner.Typing.DYNAMIC),
MethodReturn.returning(instrumentedMethod.getReturnType().asErasure()))
.apply(methodVisitor, implementationContext);
return new Size(stackSize.getMaximalSize(), instrumentedMethod.getStackSize());
}
/**
* Blueprint method that for applying the actual implementation.
*
* @param methodVisitor The method visitor to which the implementation is applied to.
* @param implementationContext The implementation context for the given implementation.
* @param instrumentedMethod The instrumented method that is target of the implementation.
* @param fixedValueType A description of the type of the fixed value that is loaded by the {@code
* valueLoadingInstruction}.
* @param valueLoadingInstruction A stack manipulation that represents the loading of the fixed
* value onto the operand stack.
* @return A representation of the stack and variable array sized that are required for this
* implementation.
*/
protected ByteCodeAppender.Size apply(
MethodVisitor methodVisitor,
Context implementationContext,
MethodDescription instrumentedMethod,
TypeDescription.Generic fixedValueType,
StackManipulation valueLoadingInstruction) {
StackManipulation assignment =
assigner.assign(fixedValueType, instrumentedMethod.getReturnType(), typing);
if (!assignment.isValid()) {
throw new IllegalArgumentException(
"Cannot return value of type " + fixedValueType + " for " + instrumentedMethod);
}
StackManipulation.Size stackSize =
new StackManipulation.Compound(
valueLoadingInstruction,
assignment,
MethodReturn.returning(instrumentedMethod.getReturnType().asErasure()))
.apply(methodVisitor, implementationContext);
return new ByteCodeAppender.Size(stackSize.getMaximalSize(), instrumentedMethod.getStackSize());
}