private void writeGroovyMethods(ClassVisitor visitor, Class<?> managedTypeClass) {
// Object propertyMissing(String name)
MethodVisitor methodVisitor =
declareMethod(
visitor, "propertyMissing", GET_PROPERTY_MISSING_METHOD_DESCRIPTOR, CONCRETE_SIGNATURE);
// throw new MissingPropertyException(name, <managed-type>.class)
methodVisitor.visitTypeInsn(NEW, MISSING_PROPERTY_EXCEPTION_TYPE);
methodVisitor.visitInsn(DUP);
putFirstMethodArgumentOnStack(methodVisitor);
putClassOnStack(methodVisitor, managedTypeClass);
methodVisitor.visitMethodInsn(
INVOKESPECIAL,
MISSING_PROPERTY_EXCEPTION_TYPE,
"<init>",
MISSING_PROPERTY_CONSTRUCTOR_DESCRIPTOR,
false);
finishVisitingMethod(methodVisitor, ATHROW);
// Object propertyMissing(String name, Object value)
methodVisitor =
declareMethod(
visitor, "propertyMissing", SET_PROPERTY_MISSING_METHOD_DESCRIPTOR, CONCRETE_SIGNATURE);
// throw new MissingPropertyException(name, <managed-type>.class)
methodVisitor.visitTypeInsn(NEW, MISSING_PROPERTY_EXCEPTION_TYPE);
methodVisitor.visitInsn(DUP);
putFirstMethodArgumentOnStack(methodVisitor);
putClassOnStack(methodVisitor, managedTypeClass);
methodVisitor.visitMethodInsn(
INVOKESPECIAL,
MISSING_PROPERTY_EXCEPTION_TYPE,
"<init>",
MISSING_PROPERTY_CONSTRUCTOR_DESCRIPTOR,
false);
finishVisitingMethod(methodVisitor, ATHROW);
// Object methodMissing(String name, Object args)
methodVisitor =
declareMethod(
visitor, "methodMissing", METHOD_MISSING_METHOD_DESCRIPTOR, CONCRETE_SIGNATURE);
// throw new MissingMethodException(name, <managed-type>.class, args)
methodVisitor.visitTypeInsn(NEW, MISSING_METHOD_EXCEPTION_TYPE);
methodVisitor.visitInsn(DUP);
putMethodArgumentOnStack(methodVisitor, 1);
putClassOnStack(methodVisitor, managedTypeClass);
putMethodArgumentOnStack(methodVisitor, 2);
methodVisitor.visitTypeInsn(CHECKCAST, OBJECT_ARRAY_TYPE);
methodVisitor.visitMethodInsn(
INVOKESPECIAL,
MISSING_METHOD_EXCEPTION_TYPE,
"<init>",
MISSING_METHOD_EXCEPTION_CONSTRUCTOR_DESCRIPTOR,
false);
finishVisitingMethod(methodVisitor, ATHROW);
}
private void castFirstStackElement(MethodVisitor methodVisitor, Class<?> returnType) {
if (returnType.isPrimitive()) {
unboxType(methodVisitor, returnType);
} else {
methodVisitor.visitTypeInsn(CHECKCAST, Type.getInternalName(returnType));
}
}
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 throwExceptionBecauseCalledOnItself(MethodVisitor methodVisitor) {
String exceptionInternalName = Type.getInternalName(UnsupportedOperationException.class);
methodVisitor.visitTypeInsn(NEW, exceptionInternalName);
methodVisitor.visitInsn(DUP);
putConstantOnStack(methodVisitor, "Calling setters of a managed type on itself is not allowed");
String constructorDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, STRING_TYPE);
methodVisitor.visitMethodInsn(
INVOKESPECIAL, exceptionInternalName, CONSTRUCTOR_NAME, constructorDescriptor, false);
methodVisitor.visitInsn(ATHROW);
}
protected void injectException(
MethodVisitor methodVisitor, Class<? extends Throwable> throwable) {
methodVisitor.visitTypeInsn(NEW, getInternalName(throwable.getCanonicalName()));
methodVisitor.visitInsn(DUP);
methodVisitor.visitTypeInsn(NEW, "java/lang/StringBuilder");
methodVisitor.visitInsn(DUP);
methodVisitor.visitLdcInsn("Invalid index: ");
methodVisitor.visitMethodInsn(
INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V");
methodVisitor.visitVarInsn(ILOAD, 2);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;");
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;");
methodVisitor.visitMethodInsn(
INVOKESPECIAL,
getInternalName(throwable.getCanonicalName()),
"<init>",
"(Ljava/lang/String;)V");
methodVisitor.visitInsn(ATHROW);
}
// 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);
}
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);
}
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);
}
public static byte[] createTargetSetterFactory(String factoryName, String className, Type target)
throws Exception {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
MethodVisitor mv;
String factoryType = AsmUtils.toType(factoryName);
String classType = AsmUtils.toType(className);
String targetType = AsmUtils.toType(target);
cw.visit(
V1_6,
ACC_FINAL + ACC_PUBLIC + ACC_SUPER,
factoryType,
"L" + CELL_HANDLER_FACTORY_TYPE + "<L" + targetType + ";>;",
CELL_HANDLER_FACTORY_TYPE,
null);
{
mv =
cw.visitMethod(
ACC_PUBLIC,
"<init>",
"("
+ AsmUtils.toDeclaredLType(Instantiator.class)
+ AsmUtils.toDeclaredLType(CsvColumnKey[].class)
+ AsmUtils.toDeclaredLType(ParsingContextFactory.class)
+ AsmUtils.toDeclaredLType(FieldMapperErrorHandler.class)
+ ")V",
"("
+ "L"
+ AsmUtils.toType(Instantiator.class)
+ "<L"
+ AsmUtils.toType(CsvMapperCellHandler.class)
+ "<L"
+ targetType
+ ";>;L"
+ targetType
+ ";>;"
+ AsmUtils.toDeclaredLType(CsvColumnKey[].class)
+ AsmUtils.toDeclaredLType(ParsingContextFactory.class)
+ "L"
+ AsmUtils.toType(FieldMapperErrorHandler.class)
+ "<L"
+ AsmUtils.toType(CsvColumnKey.class)
+ ";>;"
+ ")V",
null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
mv.visitVarInsn(ALOAD, 3);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(
INVOKESPECIAL,
CELL_HANDLER_FACTORY_TYPE,
"<init>",
"("
+ AsmUtils.toDeclaredLType(Instantiator.class)
+ AsmUtils.toDeclaredLType(CsvColumnKey[].class)
+ AsmUtils.toDeclaredLType(ParsingContextFactory.class)
+ AsmUtils.toDeclaredLType(FieldMapperErrorHandler.class)
+ ")V",
false);
mv.visitInsn(RETURN);
mv.visitMaxs(5, 5);
mv.visitEnd();
}
{
mv =
cw.visitMethod(
ACC_PUBLIC,
"newInstance",
"("
+ AsmUtils.toDeclaredLType(DelayedCellSetter[].class)
+ AsmUtils.toDeclaredLType(CellSetter[].class)
+ ")"
+ AsmUtils.toDeclaredLType(CsvMapperCellHandler.class),
"("
+ "[L"
+ DELAYED_CELL_SETTER_TYPE
+ "<L"
+ targetType
+ ";*>;"
+ "[L"
+ CELL_SETTER_TYPE
+ "<L"
+ targetType
+ ";>;"
+ ")"
+ "L"
+ AsmUtils.toType(CsvMapperCellHandler.class)
+ "<L"
+ targetType
+ ";>;",
null);
mv.visitCode();
mv.visitTypeInsn(NEW, classType);
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD, factoryType, "instantiator", AsmUtils.toDeclaredLType(Instantiator.class));
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD, factoryType, "keys", AsmUtils.toDeclaredLType(CsvColumnKey[].class));
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD,
factoryType,
"parsingContextFactory",
AsmUtils.toDeclaredLType(ParsingContextFactory.class));
mv.visitMethodInsn(
INVOKEVIRTUAL,
AsmUtils.toType(ParsingContextFactory.class),
"newContext",
"()" + AsmUtils.toDeclaredLType(ParsingContext.class),
false);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(
GETFIELD,
factoryType,
"fieldErrorHandler",
AsmUtils.toDeclaredLType(FieldMapperErrorHandler.class));
mv.visitMethodInsn(
INVOKESPECIAL,
classType,
"<init>",
"("
+ AsmUtils.toDeclaredLType(Instantiator.class)
+ AsmUtils.toDeclaredLType(DelayedCellSetter[].class)
+ AsmUtils.toDeclaredLType(CellSetter[].class)
+ AsmUtils.toDeclaredLType(CsvColumnKey[].class)
+ AsmUtils.toDeclaredLType(ParsingContext.class)
+ AsmUtils.toDeclaredLType(FieldMapperErrorHandler.class)
+ ")V",
false);
mv.visitInsn(ARETURN);
mv.visitMaxs(8, 3);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
private void writeConfigureMethod(
ClassVisitor visitor, Type generatedType, ModelProperty<?> property) {
if (!property.isWritable() && property.getSchema() instanceof CompositeSchema) {
// Adds a void $propName(Closure<?> cl) method that delegates to model state
MethodVisitor methodVisitor =
declareMethod(
visitor,
property.getName(),
Type.getMethodDescriptor(Type.VOID_TYPE, CLOSURE_TYPE),
null);
putStateFieldValueOnStack(methodVisitor, generatedType);
putConstantOnStack(methodVisitor, property.getName());
putFirstMethodArgumentOnStack(methodVisitor);
methodVisitor.visitMethodInsn(
INVOKEINTERFACE,
MODEL_ELEMENT_STATE_TYPE_INTERNAL_NAME,
"apply",
STATE_APPLY_METHOD_DESCRIPTOR,
true);
finishVisitingMethod(methodVisitor);
return;
}
if (!property.isWritable() && property.getSchema() instanceof UnmanagedImplStructSchema) {
UnmanagedImplStructSchema<?> structSchema =
(UnmanagedImplStructSchema<?>) property.getSchema();
if (!structSchema.isAnnotated()) {
return;
}
// Adds a void $propName(Closure<?> cl) method that executes the closure
MethodVisitor methodVisitor =
declareMethod(
visitor,
property.getName(),
Type.getMethodDescriptor(Type.VOID_TYPE, CLOSURE_TYPE),
null);
putThisOnStack(methodVisitor);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
generatedType.getInternalName(),
property.getGetters().get(0).getName(),
Type.getMethodDescriptor(Type.getType(property.getType().getConcreteClass())),
false);
putFirstMethodArgumentOnStack(methodVisitor);
methodVisitor.visitMethodInsn(
INVOKESTATIC,
Type.getInternalName(ClosureBackedAction.class),
"execute",
Type.getMethodDescriptor(Type.VOID_TYPE, OBJECT_TYPE, CLOSURE_TYPE),
false);
finishVisitingMethod(methodVisitor);
return;
}
// Adds a void $propName(Closure<?> cl) method that throws MME, to avoid attempts to convert
// closure to something else
MethodVisitor methodVisitor =
declareMethod(
visitor,
property.getName(),
Type.getMethodDescriptor(Type.VOID_TYPE, CLOSURE_TYPE),
null);
putThisOnStack(methodVisitor);
putConstantOnStack(methodVisitor, property.getName());
methodVisitor.visitInsn(Opcodes.ICONST_1);
methodVisitor.visitTypeInsn(Opcodes.ANEWARRAY, OBJECT_TYPE.getInternalName());
methodVisitor.visitInsn(Opcodes.DUP);
methodVisitor.visitInsn(Opcodes.ICONST_0);
putFirstMethodArgumentOnStack(methodVisitor);
methodVisitor.visitInsn(Opcodes.AASTORE);
methodVisitor.visitMethodInsn(
INVOKEVIRTUAL,
generatedType.getInternalName(),
"methodMissing",
METHOD_MISSING_METHOD_DESCRIPTOR,
false);
finishVisitingMethod(methodVisitor);
}
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();
}
