private void setCanCallSettersField(
MethodVisitor methodVisitor, Type generatedType, boolean canCallSetters) {
putThisOnStack(methodVisitor);
methodVisitor.visitLdcInsn(canCallSetters);
methodVisitor.visitFieldInsn(
PUTFIELD,
generatedType.getInternalName(),
CAN_CALL_SETTERS_FIELD_NAME,
Type.BOOLEAN_TYPE.getDescriptor());
}
private void writeManagedTypeStaticField(
Type generatedType, Class<?> managedTypeClass, MethodVisitor constructorVisitor) {
constructorVisitor.visitLdcInsn(Type.getType(managedTypeClass));
constructorVisitor.visitMethodInsn(
INVOKESTATIC, MODELTYPE_INTERNAL_NAME, "of", MODELTYPE_OF_METHOD_DESCRIPTOR, false);
constructorVisitor.visitFieldInsn(
PUTSTATIC,
generatedType.getInternalName(),
MANAGED_TYPE_FIELD_NAME,
Type.getDescriptor(ModelType.class));
}
/** Generate a call to the delegate object. */
protected MethodVisitor makeDelegateCall(
final String name,
final String desc,
final String signature,
final String[] exceptions,
final int accessFlags) {
MethodVisitor mv = super.visitMethod(accessFlags, name, desc, signature, exceptions);
mv.visitVarInsn(ALOAD, 0); // load this
mv.visitFieldInsn(
GETFIELD,
proxyName,
DELEGATE_OBJECT_FIELD,
BytecodeHelper.getTypeDescription(delegateClass)); // load delegate
// using InvokerHelper to allow potential intercepted calls
int size;
mv.visitLdcInsn(name); // method name
Type[] args = Type.getArgumentTypes(desc);
BytecodeHelper.pushConstant(mv, args.length);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
size = 3;
int idx = 1;
for (int i = 0; i < args.length; i++) {
Type arg = args[i];
mv.visitInsn(DUP);
BytecodeHelper.pushConstant(mv, i);
// primitive types must be boxed
if (isPrimitive(arg)) {
mv.visitIntInsn(getLoadInsn(arg), idx);
String wrappedType = getWrappedClassDescriptor(arg);
mv.visitMethodInsn(
INVOKESTATIC,
wrappedType,
"valueOf",
"(" + arg.getDescriptor() + ")L" + wrappedType + ";");
} else {
mv.visitVarInsn(ALOAD, idx); // load argument i
}
size = Math.max(6, 5 + registerLen(arg));
idx += registerLen(arg);
mv.visitInsn(AASTORE); // store value into array
}
mv.visitMethodInsn(
INVOKESTATIC,
"org/codehaus/groovy/runtime/InvokerHelper",
"invokeMethod",
"(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;");
unwrapResult(mv, desc);
mv.visitMaxs(size, registerLen(args) + 1);
return EMPTY_VISITOR;
}
// the overload of type Object for Groovy coercions: public void setFoo(Object foo)
private void createTypeConvertingSetter(
ClassVisitor visitor, Type generatedType, ModelProperty<?> property) {
if (!property.isWritable() || !(property.getSchema() instanceof ScalarValueSchema)) {
return;
}
Class<?> propertyClass = property.getType().getConcreteClass();
Type propertyType = Type.getType(propertyClass);
Class<?> boxedClass =
propertyClass.isPrimitive() ? BOXED_TYPES.get(propertyClass) : propertyClass;
Type boxedType = Type.getType(boxedClass);
Method setter = property.getSetter().getMethod();
MethodVisitor methodVisitor =
declareMethod(
visitor,
setter.getName(),
SET_OBJECT_PROPERTY_DESCRIPTOR,
SET_OBJECT_PROPERTY_DESCRIPTOR);
putThisOnStack(methodVisitor);
putTypeConverterFieldValueOnStack(methodVisitor, generatedType);
// Object converted = $typeConverter.convert(foo, Float.class, false);
methodVisitor.visitVarInsn(ALOAD, 1); // put var #1 ('foo') on the stack
methodVisitor.visitLdcInsn(boxedType); // push the constant Class onto the stack
methodVisitor.visitInsn(
propertyClass.isPrimitive()
? ICONST_1
: ICONST_0); // push int 1 or 0 (interpreted as true or false) onto the stack
methodVisitor.visitMethodInsn(
INVOKEINTERFACE,
TYPE_CONVERTER_TYPE.getInternalName(),
"convert",
COERCE_TO_SCALAR_DESCRIPTOR,
true);
methodVisitor.visitTypeInsn(CHECKCAST, boxedType.getInternalName());
if (propertyClass.isPrimitive()) {
unboxType(methodVisitor, propertyClass);
}
// invoke the typed setter, popping 'this' and 'converted' from the stack
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
generatedType.getInternalName(),
setter.getName(),
Type.getMethodDescriptor(Type.VOID_TYPE, propertyType),
false);
finishVisitingMethod(methodVisitor);
}
protected MethodVisitor makeDelegateToClosureCall(
final String name,
final String desc,
final String signature,
final String[] exceptions,
final int accessFlags) {
MethodVisitor mv = super.visitMethod(accessFlags, name, desc, signature, exceptions);
// TraceMethodVisitor tmv = new TraceMethodVisitor(mv);
// mv = tmv;
mv.visitCode();
int stackSize = 0;
// method body should be:
// this.$delegate$closure$methodName.call(new Object[] { method arguments })
Type[] args = Type.getArgumentTypes(desc);
int arrayStore = args.length + 1;
BytecodeHelper.pushConstant(mv, args.length);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object"); // stack size = 1
stackSize = 1;
int idx = 1;
for (int i = 0; i < args.length; i++) {
Type arg = args[i];
mv.visitInsn(DUP); // stack size = 2
BytecodeHelper.pushConstant(mv, i); // array index, stack size = 3
stackSize = 3;
// primitive types must be boxed
if (isPrimitive(arg)) {
mv.visitIntInsn(getLoadInsn(arg), idx);
String wrappedType = getWrappedClassDescriptor(arg);
mv.visitMethodInsn(
INVOKESTATIC,
wrappedType,
"valueOf",
"(" + arg.getDescriptor() + ")L" + wrappedType + ";");
} else {
mv.visitVarInsn(ALOAD, idx); // load argument i
}
idx += registerLen(arg);
stackSize = Math.max(4, 3 + registerLen(arg));
mv.visitInsn(AASTORE); // store value into array
}
mv.visitVarInsn(ASTORE, arrayStore); // store array
int arrayIndex = arrayStore;
mv.visitVarInsn(ALOAD, 0); // load this
mv.visitFieldInsn(
GETFIELD, proxyName, CLOSURES_MAP_FIELD, "Ljava/util/Map;"); // load closure map
mv.visitLdcInsn(name); // load method name
mv.visitMethodInsn(
INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
arrayStore++;
mv.visitVarInsn(ASTORE, arrayStore);
// if null, test if wildcard exists
Label notNull = new Label();
mv.visitIntInsn(ALOAD, arrayStore);
mv.visitJumpInsn(IFNONNULL, notNull);
mv.visitVarInsn(ALOAD, 0); // load this
mv.visitFieldInsn(
GETFIELD, proxyName, CLOSURES_MAP_FIELD, "Ljava/util/Map;"); // load closure map
mv.visitLdcInsn("*"); // load wildcard
mv.visitMethodInsn(
INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
mv.visitVarInsn(ASTORE, arrayStore);
mv.visitLabel(notNull);
mv.visitVarInsn(ALOAD, arrayStore);
mv.visitMethodInsn(
INVOKESTATIC,
BytecodeHelper.getClassInternalName(this.getClass()),
"ensureClosure",
"(Ljava/lang/Object;)Lgroovy/lang/Closure;");
mv.visitVarInsn(ALOAD, arrayIndex); // load argument array
stackSize++;
mv.visitMethodInsn(
INVOKEVIRTUAL,
"groovy/lang/Closure",
"call",
"([Ljava/lang/Object;)Ljava/lang/Object;"); // call closure
unwrapResult(mv, desc);
mv.visitMaxs(stackSize, arrayStore + 1);
mv.visitEnd();
// System.out.println("tmv.getText() = " + tmv.getText());
return EMPTY_VISITOR;
}
private void putConstantOnStack(MethodVisitor methodVisitor, Object value) {
methodVisitor.visitLdcInsn(value);
}