private static <T> void appendCellValue(
CellSetter<T>[] setters, boolean ignoreException, ClassWriter cw, String classType) {
MethodVisitor mv;
mv = cw.visitMethod(ACC_PUBLIC, "cellValue", "([CIII)V", null, null);
mv.visitCode();
if (setters.length != 0) {
if (ignoreException) {
callCellValue(mv, classType);
} else {
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
mv.visitLabel(l0);
callCellValue(mv, classType);
mv.visitLabel(l1);
Label l3 = new Label();
mv.visitJumpInsn(GOTO, l3);
mv.visitLabel(l2);
mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/Exception"});
mv.visitVarInsn(ASTORE, 5);
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ILOAD, 4);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(
INVOKEVIRTUAL, classType, "fieldError", "(ILjava/lang/Exception;)V", false);
mv.visitLabel(l3);
mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
}
}
mv.visitInsn(RETURN);
mv.visitMaxs(5, 6);
mv.visitEnd();
}
private static <T> void appendGetDelayedCellSetterSwitch(
DelayedCellSetterFactory<T, ?>[] delayedCellSetters,
String classType,
MethodVisitor mv,
int switchStart,
int switchEnd) {
mv.visitVarInsn(ILOAD, 1);
Label defaultLabel = new Label();
Label[] labels = newLabels(switchEnd - switchStart);
mv.visitTableSwitchInsn(switchStart, switchEnd - 1, defaultLabel, labels);
for (int i = switchStart; i < switchEnd; i++) {
mv.visitLabel(labels[i - switchStart]);
mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
if (delayedCellSetters != null) {
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD, classType, "delayedCellSetter" + i, "L" + DELAYED_CELL_SETTER_TYPE + ";");
} else {
mv.visitInsn(ACONST_NULL);
}
mv.visitInsn(ARETURN);
}
mv.visitLabel(defaultLabel);
mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
}
private void writeNonAbstractMethodWrapper(
ClassVisitor visitor, Type generatedType, Class<?> managedTypeClass, Method method) {
Label start = new Label();
Label end = new Label();
Label handler = new Label();
MethodVisitor methodVisitor = declareMethod(visitor, method);
methodVisitor.visitTryCatchBlock(start, end, handler, null);
setCanCallSettersField(methodVisitor, generatedType, false);
methodVisitor.visitLabel(start);
invokeSuperMethod(methodVisitor, managedTypeClass, method);
methodVisitor.visitLabel(end);
setCanCallSettersField(methodVisitor, generatedType, true);
methodVisitor.visitInsn(ARETURN);
methodVisitor.visitLabel(handler);
setCanCallSettersField(methodVisitor, generatedType, true);
methodVisitor.visitInsn(ATHROW);
methodVisitor.visitMaxs(0, 0);
methodVisitor.visitEnd();
}
protected void injectGetByIndex(
ClassWriter classWriter, String targetClassName, List<Field> fields) {
MethodVisitor methodVisitor =
classWriter.visitMethod(
ACC_PUBLIC,
"get",
"(Ljava/lang/Object;I)Ljava/lang/Object;",
null,
new String[] {getInternalName(ILLEGAL_ACCESS_EXCEPTION.getCanonicalName())});
Boxer boxer = new Boxer(methodVisitor);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ILOAD, 2);
int maxStack = 6;
Label[] labels = new Label[fields.size()];
Label errorLabel = new Label();
for (int i = 0; i < fields.size(); i++) {
labels[i] = new Label();
}
methodVisitor.visitTableSwitchInsn(0, labels.length - 1, errorLabel, labels);
if (!fields.isEmpty()) {
maxStack--;
for (int i = 0; i < fields.size(); i++) {
Field field = fields.get(i);
Class<?> type = field.getType();
String fieldDescriptor = Type.getDescriptor(type);
methodVisitor.visitLabel(labels[i]);
if (i == 0) methodVisitor.visitFrame(F_APPEND, 1, new Object[] {targetClassName}, 0, null);
else methodVisitor.visitFrame(F_SAME, 0, null, 0, null);
if (isPublic(field)) {
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitTypeInsn(CHECKCAST, targetClassName);
methodVisitor.visitFieldInsn(GETFIELD, targetClassName, field.getName(), fieldDescriptor);
boxer.box(Type.getType(type));
} else {
injectReflectiveGetter(methodVisitor);
}
methodVisitor.visitInsn(ARETURN);
}
methodVisitor.visitLabel(errorLabel);
methodVisitor.visitFrame(F_SAME, 0, null, 0, null);
}
injectException(methodVisitor, IllegalAccessException.class);
methodVisitor.visitMaxs(maxStack, 3);
methodVisitor.visitEnd();
}
private void writeSetter(ClassVisitor visitor, Type generatedType, ModelProperty<?> property) {
WeaklyTypeReferencingMethod<?, Void> weakSetter = property.getSetter();
// There is no setter for this property
if (weakSetter == null) {
return;
}
String propertyName = property.getName();
Class<?> propertyClass = property.getType().getConcreteClass();
Type propertyType = Type.getType(propertyClass);
Label calledOutsideOfConstructor = new Label();
Method setter = weakSetter.getMethod();
// the regular typed setter
String methodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, propertyType);
MethodVisitor methodVisitor =
declareMethod(
visitor, setter.getName(), methodDescriptor, AsmClassGeneratorUtils.signature(setter));
putCanCallSettersFieldValueOnStack(methodVisitor, generatedType);
jumpToLabelIfStackEvaluatesToTrue(methodVisitor, calledOutsideOfConstructor);
throwExceptionBecauseCalledOnItself(methodVisitor);
methodVisitor.visitLabel(calledOutsideOfConstructor);
putStateFieldValueOnStack(methodVisitor, generatedType);
putConstantOnStack(methodVisitor, propertyName);
putFirstMethodArgumentOnStack(methodVisitor, propertyType);
if (propertyClass.isPrimitive()) {
boxType(methodVisitor, propertyClass);
}
invokeStateSetMethod(methodVisitor);
finishVisitingMethod(methodVisitor);
}
protected void injectGetIndex(ClassWriter classWriter) {
MethodVisitor mv =
classWriter.visitMethod(ACC_PRIVATE, "getIndex", "(Ljava/lang/String;)I", null, null);
mv.visitCode();
mv.visitInsn(ICONST_0);
mv.visitVarInsn(ISTORE, 2);
Label forLoopLabel = new Label();
mv.visitLabel(forLoopLabel);
mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {Opcodes.INTEGER}, 0, null);
mv.visitVarInsn(ILOAD, 2);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD,
getAccessorNameInternal(this.getTarget(), this.getAccessorType()),
"fieldTable",
"[Ljava/lang/reflect/Field;");
mv.visitInsn(ARRAYLENGTH);
Label forLoopIncrementLabel = new Label();
mv.visitJumpInsn(IF_ICMPGE, forLoopIncrementLabel);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD,
getAccessorNameInternal(this.getTarget(), this.getAccessorType()),
"fieldTable",
"[Ljava/lang/reflect/Field;");
mv.visitVarInsn(ILOAD, 2);
mv.visitInsn(AALOAD);
mv.visitMethodInsn(
INVOKEVIRTUAL, "java/lang/reflect/Field", "getName", "()Ljava/lang/String;", false);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
Label equalsLabel = new Label();
mv.visitJumpInsn(IFEQ, equalsLabel);
mv.visitVarInsn(ILOAD, 2);
mv.visitInsn(IRETURN);
mv.visitLabel(equalsLabel);
mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
mv.visitIincInsn(2, 1);
mv.visitJumpInsn(GOTO, forLoopLabel);
mv.visitLabel(forLoopIncrementLabel);
mv.visitFrame(Opcodes.F_CHOP, 1, null, 0, null);
mv.visitInsn(ICONST_M1);
mv.visitInsn(IRETURN);
mv.visitMaxs(2, 3);
mv.visitEnd();
}
private void unboxType(MethodVisitor methodVisitor, Class<?> primitiveClass) {
// Float f = (Float) tmp
// f==null?0:f.floatValue()
Class<?> boxedType = BOXED_TYPES.get(primitiveClass);
Type primitiveType = Type.getType(primitiveClass);
methodVisitor.visitTypeInsn(CHECKCAST, Type.getInternalName(boxedType));
methodVisitor.visitInsn(DUP);
Label exit = new Label();
Label elseValue = new Label();
methodVisitor.visitJumpInsn(IFNONNULL, elseValue);
methodVisitor.visitInsn(POP);
pushDefaultValue(methodVisitor, primitiveClass);
methodVisitor.visitJumpInsn(GOTO, exit);
methodVisitor.visitLabel(elseValue);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
Type.getInternalName(boxedType),
primitiveClass.getSimpleName() + "Value",
Type.getMethodDescriptor(primitiveType),
false);
methodVisitor.visitLabel(exit);
}
private void writeEqualsMethod(ClassVisitor cw, Type generatedType) {
MethodVisitor methodVisitor =
cw.visitMethod(Opcodes.ACC_PUBLIC, "equals", EQUALS_METHOD_DESCRIPTOR, null, null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitVarInsn(ALOAD, 1);
Label notSameLabel = new Label();
methodVisitor.visitJumpInsn(IF_ACMPNE, notSameLabel);
methodVisitor.visitInsn(ICONST_1);
methodVisitor.visitInsn(IRETURN);
methodVisitor.visitLabel(notSameLabel);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitTypeInsn(INSTANCEOF, MANAGED_INSTANCE_TYPE);
Label notManagedInstanceLabel = new Label();
methodVisitor.visitJumpInsn(IFNE, notManagedInstanceLabel);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitInsn(IRETURN);
methodVisitor.visitLabel(notManagedInstanceLabel);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
generatedType.getInternalName(),
"getBackingNode",
GET_BACKING_NODE_METHOD_DESCRIPTOR,
false);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitTypeInsn(CHECKCAST, MANAGED_INSTANCE_TYPE);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE,
MANAGED_INSTANCE_TYPE,
"getBackingNode",
GET_BACKING_NODE_METHOD_DESCRIPTOR,
true);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE, MUTABLE_MODEL_NODE_TYPE, "equals", EQUALS_METHOD_DESCRIPTOR, true);
finishVisitingMethod(methodVisitor, Opcodes.IRETURN);
}
@Override
public void nodeDispatch(String suffix, int divide, int start, int end) {
MethodVisitor mv;
mv = cw.visitMethod(ACC_PRIVATE, name() + suffix, signature(), null, null);
mv.visitCode();
Label startLabel = new Label();
mv.visitLabel(startLabel);
final int powerOfTwo = Integer.numberOfTrailingZeros(divide);
int sStart = start >> powerOfTwo;
int sEnd = end >> powerOfTwo;
int left = end - (sEnd << powerOfTwo);
if (left > 0) {
sEnd++;
}
Label[] labels = newLabels(sEnd - sStart);
Label defaultLabel = new Label();
mv.visitVarInsn(ILOAD, argIndex());
int sub = leafStart();
if (sub != 0) {
AsmUtils.addIndex(mv, sub);
mv.visitInsn(ISUB);
}
AsmUtils.addIndex(mv, powerOfTwo);
mv.visitInsn(ISHR);
mv.visitVarInsn(ISTORE, maxArgIndex() + 1);
mv.visitVarInsn(ILOAD, maxArgIndex() + 1);
mv.visitTableSwitchInsn(sStart, sEnd - 1, defaultLabel, labels);
for (int i = sStart; i < sEnd; i++) {
int estart = i << powerOfTwo;
int eend = Math.min(end, (i + 1) << powerOfTwo);
mv.visitLabel(labels[i - sStart]);
if (i == start) {
mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {Opcodes.INTEGER}, 0, null);
} else {
mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
}
loadArguments(mv);
mv.visitMethodInsn(
INVOKESPECIAL,
classType,
name() + (divide / maxMethodSize) + "n" + estart + "t" + eend,
signature(),
false);
if (isVoid()) {
if (i < (sEnd - 1)) {
mv.visitJumpInsn(GOTO, defaultLabel);
}
} else {
mv.visitInsn(ARETURN);
}
}
mv.visitLabel(defaultLabel);
mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
if (isVoid()) {
mv.visitInsn(RETURN);
} else {
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
}
Label endLabel = new Label();
mv.visitLabel(endLabel);
appendDebugInfo(mv, startLabel, endLabel);
mv.visitMaxs(6, 5);
mv.visitEnd();
}
protected void injectConstructor(ClassWriter classWriter) {
String resultName = getAccessorNameInternal(this.getTarget(), this.getAccessorType());
MethodVisitor methodVisitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
;
methodVisitor.visitTypeInsn(NEW, "java/util/ArrayList");
methodVisitor.visitInsn(DUP);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/util/ArrayList", "<init>", "()V", false);
methodVisitor.visitVarInsn(ASTORE, 1);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL, resultName, "getTargetClass", "()Ljava/lang/Class;", false);
methodVisitor.visitVarInsn(ASTORE, 2);
Label whileLoop = new Label(); // enter the "while (currentClass != Object.class)" loop
methodVisitor.visitLabel(whileLoop);
methodVisitor.visitFrame(
Opcodes.F_FULL,
3,
new Object[] {resultName, "java/util/List", "java/lang/Class"},
0,
new Object[] {});
methodVisitor.visitVarInsn(ALOAD, 2);
methodVisitor.visitLdcInsn(Type.getType("Ljava/lang/Object;"));
Label classNotObjectComparer =
new Label(); // compares the current class to Object.class aka currentClass != Object.class
methodVisitor.visitJumpInsn(IF_ACMPEQ, classNotObjectComparer);
methodVisitor.visitVarInsn(ALOAD, 2);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
"java/lang/Class",
"getDeclaredFields",
"()[Ljava/lang/reflect/Field;",
false);
methodVisitor.visitVarInsn(ASTORE, 3);
methodVisitor.visitVarInsn(ALOAD, 3);
methodVisitor.visitInsn(ARRAYLENGTH);
methodVisitor.visitVarInsn(ISTORE, 4);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitVarInsn(ISTORE, 5);
Label cachingForLoop = new Label(); // this loop handles the storing of the fields (to the list)
methodVisitor.visitLabel(cachingForLoop);
methodVisitor.visitFrame(
Opcodes.F_APPEND,
3,
new Object[] {"[Ljava/lang/reflect/Field;", Opcodes.INTEGER, Opcodes.INTEGER},
0,
null);
methodVisitor.visitVarInsn(ILOAD, 5);
methodVisitor.visitVarInsn(ILOAD, 4);
Label cachingForLoopIncrementLabel = new Label(); // handles the looping of the fields
methodVisitor.visitJumpInsn(IF_ICMPGE, cachingForLoopIncrementLabel);
methodVisitor.visitVarInsn(ALOAD, 3);
methodVisitor.visitVarInsn(ILOAD, 5);
methodVisitor.visitInsn(AALOAD);
methodVisitor.visitVarInsn(ASTORE, 6);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitVarInsn(ALOAD, 6);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE, "java/util/List", "add", "(Ljava/lang/Object;)Z", true);
methodVisitor.visitInsn(POP);
methodVisitor.visitIincInsn(5, 1);
methodVisitor.visitJumpInsn(GOTO, cachingForLoop);
methodVisitor.visitLabel(cachingForLoopIncrementLabel);
methodVisitor.visitFrame(Opcodes.F_CHOP, 3, null, 0, null);
methodVisitor.visitVarInsn(ALOAD, 2);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL, "java/lang/Class", "getSuperclass", "()Ljava/lang/Class;", false);
methodVisitor.visitVarInsn(ASTORE, 2);
methodVisitor.visitJumpInsn(GOTO, whileLoop);
methodVisitor.visitLabel(classNotObjectComparer);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()I", true);
methodVisitor.visitTypeInsn(ANEWARRAY, "java/lang/reflect/Field");
methodVisitor.visitFieldInsn(PUTFIELD, resultName, "fieldTable", "[Ljava/lang/reflect/Field;");
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitVarInsn(ISTORE, 3);
Label storingForLoop =
new Label(); // this for loop goes about storing the fields in the array defined in the
// class
methodVisitor.visitLabel(storingForLoop);
methodVisitor.visitFrame(Opcodes.F_APPEND, 1, new Object[] {Opcodes.INTEGER}, 0, null);
methodVisitor.visitVarInsn(ILOAD, 3);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitFieldInsn(GETFIELD, resultName, "fieldTable", "[Ljava/lang/reflect/Field;");
methodVisitor.visitInsn(ARRAYLENGTH);
Label storage =
new Label(); // gets the field at position x and stores it in the cache (fieldTable)
methodVisitor.visitJumpInsn(IF_ICMPGE, storage);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitFieldInsn(GETFIELD, resultName, "fieldTable", "[Ljava/lang/reflect/Field;");
methodVisitor.visitVarInsn(ILOAD, 3);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitVarInsn(ILOAD, 3);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE, "java/util/List", "get", "(I)Ljava/lang/Object;", true);
methodVisitor.visitTypeInsn(CHECKCAST, "java/lang/reflect/Field");
methodVisitor.visitInsn(AASTORE);
methodVisitor.visitIincInsn(3, 1);
methodVisitor.visitJumpInsn(GOTO, storingForLoop);
methodVisitor.visitLabel(storage);
methodVisitor.visitFrame(Opcodes.F_CHOP, 1, null, 0, null);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(4, 7);
methodVisitor.visitEnd();
}