private static byte[] generate(String name, Class<?> type, Class<?> parameter) {
name = name.replace('.', '/');
String typeName = Type.getInternalName(type);
String typeDesc = Type.getDescriptor(type);
String parameterName = Type.getInternalName(parameter);
String parameterDesc = Type.getDescriptor(parameter);
String constructSignature = '(' + parameterDesc + ')' + typeDesc;
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(V1_6, ACC_PUBLIC + ACC_FINAL + ACC_SUPER, name, null, BASE_CLASS, null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "(Ljava/lang/Class;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKESPECIAL, BASE_CLASS, "<init>", "(Ljava/lang/Class;)V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(2, 2);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC, "construct", constructSignature, null, null);
mv.visitCode();
mv.visitTypeInsn(NEW, typeName);
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKESPECIAL, typeName, "<init>", '(' + parameterDesc + ")V", false);
mv.visitInsn(ARETURN);
mv.visitMaxs(3, 2);
mv.visitEnd();
}
{
mv =
cw.visitMethod(
ACC_PUBLIC + ACC_BRIDGE + ACC_SYNTHETIC,
"construct",
"(Ljava/lang/Object;)Ljava/lang/Object;",
null,
null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, parameterName);
mv.visitMethodInsn(INVOKEVIRTUAL, name, "construct", constructSignature, false);
mv.visitInsn(ARETURN);
mv.visitMaxs(2, 2);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
public Class<?> createWrapper(Method callback) {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
String name = getUniqueName(callback);
String desc = name.replace('.', '/');
String instType = Type.getInternalName(callback.getDeclaringClass());
String eventType = Type.getInternalName(callback.getParameterTypes()[0]);
/*
System.out.println("Name: " + name);
System.out.println("Desc: " + desc);
System.out.println("InstType: " + instType);
System.out.println("Callback: " + callback.getName() + Type.getMethodDescriptor(callback));
System.out.println("Event: " + eventType);
*/
cw.visit(
V1_6, ACC_PUBLIC | ACC_SUPER, desc, null, "java/lang/Object", new String[] {HANDLER_DESC});
cw.visitSource(".dynamic", null);
{
cw.visitField(ACC_PUBLIC, "instance", "Ljava/lang/Object;", null, null).visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "(Ljava/lang/Object;)V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitFieldInsn(PUTFIELD, desc, "instance", "Ljava/lang/Object;");
mv.visitInsn(RETURN);
mv.visitMaxs(2, 2);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC, "invoke", HANDLER_FUNC_DESC, null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, desc, "instance", "Ljava/lang/Object;");
mv.visitTypeInsn(CHECKCAST, instType);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, eventType);
mv.visitMethodInsn(
INVOKEVIRTUAL, instType, callback.getName(), Type.getMethodDescriptor(callback));
mv.visitInsn(RETURN);
mv.visitMaxs(2, 2);
mv.visitEnd();
}
cw.visitEnd();
return LOADER.define(name, cw.toByteArray());
}
private void declareClass(
ClassVisitor visitor,
Collection<String> interfaceInternalNames,
Type generatedType,
Type superclassType) {
visitor.visit(
V1_6,
ACC_PUBLIC,
generatedType.getInternalName(),
null,
superclassType.getInternalName(),
Iterables.toArray(interfaceInternalNames, String.class));
}
// 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);
}
@Override
public Type emit_const(MethodVisitor fa) {
Type type = ELIST_TYPE;
fa.visitTypeInsn(Opcodes.NEW, type.getInternalName());
fa.visitInsn(Opcodes.DUP);
((EObject) head).emit_const(fa);
((EObject) tail).emit_const(fa);
fa.visitMethodInsn(Opcodes.INVOKESPECIAL, type.getInternalName(), "<init>", CONSTRUCTOR_DESC);
return type;
}
@Override
protected void insertTransform(
MethodVisitor mv, Parameter param, Class<?> targetType, int local) {
mv.visitVarInsn(ALOAD, local);
Label failure = new Label();
Label success = new Label();
mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "isPresent", "()Z", false);
mv.visitJumpInsn(IFEQ, failure);
// Unwrap the optional
mv.visitVarInsn(ALOAD, local);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "get", "()Ljava/lang/Object;", false);
mv.visitVarInsn(ASTORE, local);
mv.visitVarInsn(ALOAD, local);
mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(targetType));
if (this.anno.typeFilter().length != 0) {
mv.visitJumpInsn(IFEQ, failure);
mv.visitVarInsn(ALOAD, local);
// For each type we do an instance check and jump to either failure or success if matched
for (int i = 0; i < this.anno.typeFilter().length; i++) {
Class<?> filter = this.anno.typeFilter()[i];
if (i < this.anno.typeFilter().length - 1) {
mv.visitInsn(DUP);
}
mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(filter));
if (this.anno.inverse()) {
mv.visitJumpInsn(IFNE, failure);
} else {
mv.visitJumpInsn(IFNE, success);
}
}
if (this.anno.inverse()) {
mv.visitJumpInsn(GOTO, success);
}
// If the annotation was not reversed then we fall into failure as no types were matched
} else {
mv.visitJumpInsn(IFNE, success);
}
mv.visitLabel(failure);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
mv.visitLabel(success);
}
private boolean classIsDefinitelyMutable(ClassNode klass) {
if (superClassIsDefinitelyMutable(klass.superName)) {
log.add("Mutable parent: " + klass.name + " < " + klass.superName);
return true;
}
for (FieldNode field : klass.fields) {
if ((field.access & Opcodes.ACC_STATIC) != 0) {
continue;
}
if ((field.access & Opcodes.ACC_FINAL) == 0) {
log.add("Non-final field: " + klass.name + "#" + field.name + ":" + field.desc);
return true;
}
if (field.name.contains("$")) {
// Generated fields are assumed to be effectively immutable.
// This could, in principle, miss an issue like a static reference to a
// seemingly-immutable inner class object that maintains a hidden reference
// to its mutable outer object, but that seems unlikely.
continue;
}
Type type = Type.getType(field.desc);
if (IMMUTABLE_TYPE_SORTS.contains(type.getSort())) {
continue;
}
if (type.getSort() != Type.OBJECT) {
log.add("Odd sort: " + klass.name + "#" + field.name + ":" + field.desc);
return true;
}
if (allClasses.keySet().contains(type.getInternalName())) {
if (classesWithMutableDescendents.contains(type.getInternalName())) {
log.add("Internal mutable field: " + klass.name + "#" + field.name + ":" + field.desc);
return true;
}
} else {
if (!EXTERNAL_IMMUTABLE_CLASSES.contains(type.getInternalName())) {
log.add("External mutable field: " + klass.name + "#" + field.name + ":" + field.desc);
return true;
}
}
}
return false;
}
public static Class<?> getClassForType(Type type) {
checkArgNotNull(type, "type");
switch (type.getSort()) {
case Type.BOOLEAN:
return boolean.class;
case Type.BYTE:
return byte.class;
case Type.CHAR:
return char.class;
case Type.DOUBLE:
return double.class;
case Type.FLOAT:
return float.class;
case Type.INT:
return int.class;
case Type.LONG:
return long.class;
case Type.SHORT:
return short.class;
case Type.VOID:
return void.class;
case Type.OBJECT:
case Type.ARRAY:
return getClassForInternalName(type.getInternalName());
}
throw new IllegalStateException(); // should be unreachable
}
private void generateAccessor(
ClassWriter cw,
Class<?> parentType,
String internalName,
Property<Class<?>, Method> property) {
Method accessor = property.getAccessor();
MethodVisitor mv =
cw.visitMethod(
ACC_PUBLIC, accessor.getName(), Type.getMethodDescriptor(accessor), null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD,
internalName,
property.getName(),
Type.getDescriptor(property.getLeastSpecificType()));
if (!property.isLeastSpecificType()) {
mv.visitTypeInsn(CHECKCAST, Type.getInternalName(property.getType()));
}
mv.visitInsn(Type.getType(property.getType()).getOpcode(IRETURN));
mv.visitMaxs(0, 0);
mv.visitEnd();
}
/**
* Insert the necessary methods to unbox a primitive type (if the given type is a primitive).
*
* @param mv The method visitor
* @param type The type to unbox
*/
public static void visitUnboxingMethod(MethodVisitor mv, Type type) {
if (type.getSort() == Type.BOOLEAN) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Boolean");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z", false);
} else if (type.getSort() == Type.INT) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Integer");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I", false);
} else if (type.getSort() == Type.BYTE) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Byte");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Byte", "byteValue", "()B", false);
} else if (type.getSort() == Type.SHORT) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Short");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Short", "shortValue", "()S", false);
} else if (type.getSort() == Type.LONG) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Long");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J", false);
} else if (type.getSort() == Type.FLOAT) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Float");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Float", "floatValue", "()F", false);
} else if (type.getSort() == Type.DOUBLE) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Double");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Double", "doubleValue", "()D", false);
} else if (type.getSort() == Type.CHAR) {
mv.visitTypeInsn(CHECKCAST, "java/lang/Character");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Character", "charValue", "()C", false);
} else {
mv.visitTypeInsn(CHECKCAST, type.getInternalName());
}
}
private void castFirstStackElement(MethodVisitor methodVisitor, Class<?> returnType) {
if (returnType.isPrimitive()) {
unboxType(methodVisitor, returnType);
} else {
methodVisitor.visitTypeInsn(CHECKCAST, Type.getInternalName(returnType));
}
}
@Override
public DataType visitPrint_stmt(@NotNull PythonParser.Print_stmtContext ctx) {
mv.visitFieldInsn(
GETSTATIC,
Type.getInternalName(System.class),
"out",
Type.getDescriptor(PrintStream.class));
DataType type = visitTest(ctx.test());
mv.visitMethodInsn(
INVOKEVIRTUAL,
Type.getInternalName(PrintStream.class),
"println",
Type.getMethodDescriptor(Type.VOID_TYPE, type.getType()),
false);
return null;
}
public void addSetMethod(MetaBeanProperty property) throws Exception {
MetaMethod setter = property.getSetter();
Type paramType = Type.getType(setter.getParameterTypes()[0].getTheClass());
Type returnType = Type.getType(setter.getReturnType());
String setterDescriptor = Type.getMethodDescriptor(returnType, new Type[] {paramType});
// GENERATE public void <propName>(<type> v) { <setter>(v) }
String setMethodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {paramType});
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, property.getName(), setMethodDescriptor, null, new String[0]);
methodVisitor.visitCode();
// GENERATE <setter>(v)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitVarInsn(paramType.getOpcode(Opcodes.ILOAD), 1);
methodVisitor.visitMethodInsn(
Opcodes.INVOKEVIRTUAL,
generatedType.getInternalName(),
setter.getName(),
setterDescriptor);
// END
methodVisitor.visitInsn(Opcodes.RETURN);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
private int firePeacefulRegenEventAndStoreEventBefore(
MethodNode method, AbstractInsnNode injectPoint, LabelNode endLabel) {
// create variable
LabelNode peacefulRegenEventStart = new LabelNode();
LocalVariableNode peacefulRegenEvent =
new LocalVariableNode(
"peacefulRegenEvent",
Type.getDescriptor(HealthRegenEvent.PeacefulRegen.class),
null,
peacefulRegenEventStart,
endLabel,
method.maxLocals);
method.maxLocals += 1;
method.localVariables.add(peacefulRegenEvent);
InsnList toInject = new InsnList();
// HealthRegenEvent.PeacefulRegen peacefulRegenEvent = Hooks.firePeacefulRegenEvent(this);
toInject.add(new VarInsnNode(ALOAD, 0));
toInject.add(
new MethodInsnNode(
INVOKESTATIC,
Type.getInternalName(Hooks.class),
"firePeacefulRegenEvent",
"(Lnet/minecraft/entity/player/EntityPlayer;)Lsqueek/applecore/api/hunger/HealthRegenEvent$PeacefulRegen;",
false));
toInject.add(new VarInsnNode(ASTORE, peacefulRegenEvent.index));
toInject.add(peacefulRegenEventStart);
method.instructions.insertBefore(injectPoint, toInject);
return peacefulRegenEvent.index;
}
/**
* Creates a new local variable of the given type.
*
* @param type the type of the local variable to be created.
* @return the identifier of the newly created local variable.
*/
public int newLocal(final Type type) {
Object t;
switch (type.getSort()) {
case Type.BOOLEAN:
case Type.CHAR:
case Type.BYTE:
case Type.SHORT:
case Type.INT:
t = Opcodes.INTEGER;
break;
case Type.FLOAT:
t = Opcodes.FLOAT;
break;
case Type.LONG:
t = Opcodes.LONG;
break;
case Type.DOUBLE:
t = Opcodes.DOUBLE;
break;
case Type.ARRAY:
t = type.getDescriptor();
break;
// case Type.OBJECT:
default:
t = type.getInternalName();
break;
}
int local = newLocalMapping(type);
setLocalType(local, type);
setFrameLocal(local, t);
return local;
}
private Type getMirrorType(final Type type) {
int numDimensions = 0;
final Type basicType;
if (type.getSort() == Type.ARRAY) {
numDimensions = type.getDimensions();
basicType = type.getElementType();
} else {
basicType = type;
}
if (basicType.getSort() != Type.OBJECT) {
return type;
}
final Mirror mirror = getMirror(basicType.getInternalName());
if (mirror.isClassMirror()) {
final StringBuilder name = new StringBuilder();
for (int i = 0; i < numDimensions; ++i) {
name.append('[');
}
name.append('L').append(mirror.getTranslatedName()).append(';');
return Type.getType(name.toString());
}
return type;
}
private static byte[] generateEventExecutor(Method m, String name) {
final boolean staticMethod = Modifier.isStatic(m.getModifiers());
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
writer.visit(
V1_8,
ACC_PUBLIC,
name,
null,
"java/lang/Object",
new String[] {Type.getInternalName(EventExecutor.class)});
// Generate constructor
MethodVisitor methodGenerator = writer.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
methodGenerator.visitVarInsn(ALOAD, 0);
methodGenerator.visitMethodInsn(
INVOKESPECIAL,
"java/lang/Object",
"<init>",
"()V",
false); // Invoke the super class (Object) constructor
methodGenerator.visitInsn(RETURN);
methodGenerator.visitMaxs(1, 1);
methodGenerator.visitEnd();
// Generate the execute method
methodGenerator =
writer.visitMethod(
ACC_PUBLIC, "fire", "(Ljava/lang/Object;Ljava/lang/Object;)V", null, null);
if (!staticMethod) {
methodGenerator.visitVarInsn(ALOAD, 1);
methodGenerator.visitTypeInsn(CHECKCAST, Type.getInternalName(m.getDeclaringClass()));
}
methodGenerator.visitVarInsn(ALOAD, 2);
methodGenerator.visitTypeInsn(CHECKCAST, Type.getInternalName(m.getParameterTypes()[0]));
methodGenerator.visitMethodInsn(
staticMethod ? INVOKESTATIC : INVOKEVIRTUAL,
Type.getInternalName(m.getDeclaringClass()),
m.getName(),
Type.getMethodDescriptor(m),
m.getDeclaringClass().isInterface());
if (m.getReturnType() != void.class) {
methodGenerator.visitInsn(POP);
}
methodGenerator.visitInsn(RETURN);
methodGenerator.visitMaxs(staticMethod ? 1 : 2, 3);
methodGenerator.visitEnd();
writer.visitEnd();
return writer.toByteArray();
}
private void invokeSuperConstructor(MethodVisitor constructorVisitor, Type superclassType) {
putThisOnStack(constructorVisitor);
constructorVisitor.visitMethodInsn(
INVOKESPECIAL,
superclassType.getInternalName(),
CONSTRUCTOR_NAME,
Type.getMethodDescriptor(Type.VOID_TYPE),
false);
}
@Override
public void visitLdcInsn(Object cst) {
if (cst instanceof Type) {
Type type = (Type) cst;
AsmClass usedClass = asmClassProvider.getClass(type.getInternalName(), DETAIL_LEVEL.NOTHING);
method.addEdge(new AsmEdge(method, usedClass, SourceCodeEdgeUsage.USES, lineNumber));
}
emptyMethod = false;
}
private void boxType(MethodVisitor methodVisitor, Class<?> primitiveType) {
Class<?> boxedType = BOXED_TYPES.get(primitiveType);
methodVisitor.visitMethodInsn(
INVOKESTATIC,
Type.getInternalName(boxedType),
"valueOf",
"(" + Type.getDescriptor(primitiveType) + ")" + Type.getDescriptor(boxedType),
false);
}
private void assignStateField(MethodVisitor constructorVisitor, Type generatedType) {
putThisOnStack(constructorVisitor);
putFirstMethodArgumentOnStack(constructorVisitor);
constructorVisitor.visitFieldInsn(
PUTFIELD,
generatedType.getInternalName(),
STATE_FIELD_NAME,
MODEL_ELEMENT_STATE_TYPE.getDescriptor());
}
private void assignTypeConverterField(MethodVisitor constructorVisitor, Type generatedType) {
putThisOnStack(constructorVisitor);
putSecondMethodArgumentOnStack(constructorVisitor);
constructorVisitor.visitFieldInsn(
PUTFIELD,
generatedType.getInternalName(),
TYPE_CONVERTER_FIELD_NAME,
TYPE_CONVERTER_TYPE.getDescriptor());
}
private void invokeSuperMethod(MethodVisitor methodVisitor, Class<?> superClass, Method method) {
putThisOnStack(methodVisitor);
methodVisitor.visitMethodInsn(
INVOKESPECIAL,
Type.getInternalName(superClass),
method.getName(),
Type.getMethodDescriptor(method),
false);
}
@Override
protected void insertCauseCall(MethodVisitor mv, Parameter param, Class<?> targetType) {
mv.visitLdcInsn(Type.getType(this.anno.value()));
mv.visitMethodInsn(
INVOKEVIRTUAL,
Type.getInternalName(Cause.class),
"after",
"(Ljava/lang/Class;)Ljava/util/Optional;",
false);
}
private void assignDelegateField(
MethodVisitor constructorVisitor, Type generatedType, Type delegateType) {
putThisOnStack(constructorVisitor);
putThirdMethodArgumentOnStack(constructorVisitor);
constructorVisitor.visitFieldInsn(
PUTFIELD,
generatedType.getInternalName(),
DELEGATE_FIELD_NAME,
delegateType.getDescriptor());
}
public void addSetter(MetaBeanProperty property) throws Exception {
MetaMethod setter = property.getSetter();
// GENERATE public <return-type> <setter>(<type> v) { <return-type> v = super.<setter>(v);
// <prop>Set = true; return v; }
Type paramType = Type.getType(setter.getParameterTypes()[0].getTheClass());
Type returnType = Type.getType(setter.getReturnType());
String setterDescriptor = Type.getMethodDescriptor(returnType, new Type[] {paramType});
MethodVisitor methodVisitor =
visitor.visitMethod(
Opcodes.ACC_PUBLIC, setter.getName(), setterDescriptor, null, new String[0]);
methodVisitor.visitCode();
// GENERATE super.<setter>(v)
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitVarInsn(paramType.getOpcode(Opcodes.ILOAD), 1);
methodVisitor.visitMethodInsn(
Opcodes.INVOKESPECIAL,
superclassType.getInternalName(),
setter.getName(),
setterDescriptor);
// END
// GENERATE <prop>Set = true
methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
methodVisitor.visitLdcInsn(true);
methodVisitor.visitFieldInsn(
Opcodes.PUTFIELD,
generatedType.getInternalName(),
String.format("%sSet", property.getName()),
Type.BOOLEAN_TYPE.getDescriptor());
// END
methodVisitor.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
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 addType(Type t) {
switch (t.getSort()) {
case Type.ARRAY:
addType(t.getElementType());
break;
case Type.OBJECT:
addName(t.getInternalName());
break;
}
}
/**
* Create the event class.
*
* @param type The type
* @param name The canonical of the generated class
* @param parentType The parent type
* @return The class' contents, to be loaded via a {@link ClassLoader}
*/
public byte[] createClass(
final Class<?> type,
final String name,
final Class<?> parentType,
List<? extends EventFactoryPlugin> plugins) {
checkNotNull(type, "type");
checkNotNull(name, "name");
checkNotNull(parentType, "parentType");
final ImmutableSet<? extends Property<Class<?>, Method>> properties =
this.propertySearch.findProperties(new ReflectionClassWrapper(type));
final String internalName = getInternalName(name);
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
cw.visit(
V1_6,
ACC_PUBLIC + ACC_SUPER,
internalName,
null,
Type.getInternalName(parentType),
new String[] {Type.getInternalName(type)});
MethodVisitor toStringMv = this.initializeToString(cw, type);
this.generateWithPlugins(cw, type, parentType, internalName, properties, toStringMv, plugins);
// Create the fields
// this.contributeFields(cw, parentType, properties, plugins);
// Create the constructor
this.generateConstructor(cw, internalName, parentType, properties);
// The return value of toString takes the form of
// "ClassName{param1=value1, param2=value2, ...}"
// Create the accessors and mutators, and fill out the toString method
this.finalizeToString(toStringMv);
cw.visitEnd();
return cw.toByteArray();
}
public void addPeacefulRegenHook(ClassNode classNode, MethodNode method) {
AbstractInsnNode relevantConditional =
ASMHelper.find(method.instructions, new LdcInsnNode("naturalRegeneration"));
JumpInsnNode ifNode =
(JumpInsnNode) ASMHelper.find(relevantConditional, new JumpInsnNode(IFEQ, new LabelNode()));
LabelNode ifBlockEndLabel = ifNode.label;
AbstractInsnNode targetNode = ASMHelper.find(ifNode, new InsnNode(FCONST_1)).getPrevious();
int peacefulRegenEventIndex =
firePeacefulRegenEventAndStoreEventBefore(method, targetNode, ifBlockEndLabel);
InsnList healAmountNeedle = new InsnList();
healAmountNeedle.add(new InsnNode(FCONST_1));
InsnList healAmountReplacement = new InsnList();
healAmountReplacement.add(new VarInsnNode(ALOAD, peacefulRegenEventIndex));
healAmountReplacement.add(
new FieldInsnNode(
GETFIELD,
Type.getInternalName(HealthRegenEvent.PeacefulRegen.class),
"deltaHealth",
"F"));
ASMHelper.findAndReplace(
method.instructions, healAmountNeedle, healAmountReplacement, targetNode);
InsnList ifNotCanceledBlock = new InsnList();
LabelNode ifNotCanceled = new LabelNode();
ifNotCanceledBlock.add(new VarInsnNode(ALOAD, peacefulRegenEventIndex));
ifNotCanceledBlock.add(
new MethodInsnNode(
INVOKEVIRTUAL,
Type.getInternalName(HealthRegenEvent.PeacefulRegen.class),
"isCanceled",
"()Z",
false));
ifNotCanceledBlock.add(new JumpInsnNode(IFNE, ifNotCanceled));
method.instructions.insertBefore(targetNode, ifNotCanceledBlock);
method.instructions.insertBefore(ifBlockEndLabel, ifNotCanceled);
}
