private FieldVisitor declareStaticField(ClassVisitor visitor, String name, Class<?> fieldClass) {
return visitor.visitField(
ACC_PRIVATE | ACC_FINAL | ACC_STATIC | ACC_SYNTHETIC,
name,
Type.getDescriptor(fieldClass),
null,
null);
}
@Override
public void visitEnd() {
// add fields
for (ThreadLocalVar tlv : threadLocalVars) {
super.visitField(Opcodes.ACC_PUBLIC, tlv.getName(), tlv.getTypeAsDesc(), null, null);
}
super.visitEnd();
}
public void visitField(FieldNode fieldNode) {
cv.visitField(
fieldNode.getModifiers(),
fieldNode.getName(),
BytecodeHelper.getTypeDescription(fieldNode.getType()),
null, // fieldValue, //br all the sudden that one cannot init the field here. init is done
// in static initializer and instance initializer.
null);
}
public String getNewStaticConstant(String type, String name_prefix) {
ClassVisitor cv = getClassVisitor();
String realName;
synchronized (this) {
realName = "__" + constants++;
}
// declare the field
cv.visitField(ACC_PRIVATE | ACC_STATIC | ACC_FINAL, realName, type, null, null).visitEnd();
return realName;
}
public String getNewField(String type, String name, Object init) {
ClassVisitor cv = getClassVisitor();
// declare the field
cv.visitField(ACC_PRIVATE, name, type, null, null).visitEnd();
if (init != null) {
initMethod.aload(THIS);
initMethod.ldc(init);
initMethod.putfield(getClassname(), name, type);
}
return name;
}
public String getNewConstant(String type, String name_prefix, Object init) {
ClassVisitor cv = getClassVisitor();
String realName = getNewConstantName();
// declare the field
cv.visitField(ACC_PRIVATE, realName, type, null, null).visitEnd();
if (init != null) {
initMethod.aload(THIS);
initMethod.ldc(init);
initMethod.putfield(getClassname(), realName, type);
}
return realName;
}
public void test() throws Exception {
ClassWriter cw = new ClassWriter(true);
ClassVisitor cv = new StaticInitMerger("$clinit$", cw);
cv.visit(V1_1, ACC_PUBLIC, "A", null, "java/lang/Object", null);
cv.visitField(ACC_PUBLIC + ACC_STATIC, "counter", "I", null, null);
for (int i = 0; i < 5; ++i) {
MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "<clinit>", "()V", null, null);
mv.visitFieldInsn(GETSTATIC, "A", "counter", "I");
mv.visitInsn(ICONST_1);
mv.visitInsn(IADD);
mv.visitFieldInsn(PUTSTATIC, "A", "counter", "I");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
}
MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
cv.visitEnd();
Class c = LOADER.defineClass("A", cw.toByteArray());
assertEquals(c.getField("counter").getInt(c.newInstance()), 5);
}
public void accept(ClassVisitor cv) {
cv.visitField(access, name, type.getDescriptor(), null /*generics*/, null /*value*/);
}
public static byte[] generate(EventClassModel model) {
ClassWriter cwriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
ClassVisitor cw;
if (TRACE) {
cw = new TraceClassVisitor(cwriter, new ASMifier(), new PrintWriter(System.out));
cw = new CheckClassAdapter(cw);
} else {
cw = cwriter;
}
FieldVisitor fv;
MethodVisitor mv;
String concreteClassName =
model.getRootPackageInternalPrefix() + "event/" + model.technicalNameCapitalized + "Event";
String className =
model.isCustomized
? model.getRootPackageInternalPrefix()
+ "event/Abstract"
+ model.technicalNameCapitalized
+ "Event"
: concreteClassName;
cw.visit(
V1_7,
ACC_PUBLIC + ACC_SUPER + (model.isCustomized ? ACC_ABSTRACT : 0),
className,
null,
"org/instantlogic/interaction/flow/impl/SimpleFlowEvent",
null);
// public static final HomeEvent
{
fv =
cw.visitField(
ACC_PUBLIC + ACC_FINAL + ACC_STATIC,
"INSTANCE",
"L" + concreteClassName + ";",
null,
null);
fv.visitEnd();
}
{
mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
mv.visitCode();
// INSTANCE = new HomeEvent();
mv.visitTypeInsn(NEW, concreteClassName);
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, concreteClassName, "<init>", "()V");
mv.visitFieldInsn(PUTSTATIC, className, "INSTANCE", "L" + concreteClassName + ";");
mv.visitInsn(RETURN);
mv.visitMaxs(9, 99);
mv.visitEnd();
}
// Default synthetic constructor
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitLdcInsn(model.name);
mv.visitIntInsn(BIPUSH, model.parameters.size());
mv.visitTypeInsn(ANEWARRAY, "org/instantlogic/fabric/model/Entity");
int i = 0;
for (String parameter : model.parameters) {
mv.visitInsn(DUP);
mv.visitIntInsn(BIPUSH, i);
mv.visitFieldInsn(
GETSTATIC,
model.getRootPackageInternalPrefix() + "entity/" + parameter + "Entity",
"INSTANCE",
"L" + model.getRootPackageInternalPrefix() + "entity/" + parameter + "Entity;");
mv.visitInsn(AASTORE);
i++;
}
mv.visitMethodInsn(
INVOKESPECIAL,
"org/instantlogic/interaction/flow/impl/SimpleFlowEvent",
"<init>",
"(Ljava/lang/String;[Lorg/instantlogic/fabric/model/Entity;)V");
mv.visitInsn(RETURN);
mv.visitMaxs(9, 99);
mv.visitEnd();
}
cw.visitEnd();
return cwriter.toByteArray();
}
private void declareField(ClassVisitor visitor, String name, Class<?> fieldClass) {
visitor.visitField(
ACC_PRIVATE | ACC_FINAL | ACC_SYNTHETIC, name, Type.getDescriptor(fieldClass), null, null);
}