static void emitFromNativeConversion(
AsmBuilder builder,
SkinnyMethodAdapter mv,
FromNativeType fromNativeType,
Class nativeClass) {
// If there is a result converter, retrieve it and put on the stack
FromNativeConverter fromNativeConverter = fromNativeType.getFromNativeConverter();
if (fromNativeConverter != null) {
convertPrimitive(
mv,
nativeClass,
unboxedType(fromNativeConverter.nativeType()),
fromNativeType.getNativeType());
boxValue(builder, mv, fromNativeConverter.nativeType(), nativeClass);
Method fromNativeMethod = getFromNativeMethod(fromNativeType, builder.getClassLoader());
getfield(mv, builder, builder.getFromNativeConverterField(fromNativeConverter));
mv.swap();
if (fromNativeType.getFromNativeContext() != null) {
getfield(
mv, builder, builder.getFromNativeContextField(fromNativeType.getFromNativeContext()));
} else {
mv.aconst_null();
}
if (fromNativeMethod.getDeclaringClass().isInterface()) {
mv.invokeinterface(
fromNativeMethod.getDeclaringClass(),
fromNativeMethod.getName(),
fromNativeMethod.getReturnType(),
fromNativeMethod.getParameterTypes());
} else {
mv.invokevirtual(
fromNativeMethod.getDeclaringClass(),
fromNativeMethod.getName(),
fromNativeMethod.getReturnType(),
fromNativeMethod.getParameterTypes());
}
if (fromNativeType.getDeclaredType().isPrimitive()) {
// The actual return type is a primitive, but there was a converter for it - extract the
// primitive value
Class boxedType = getBoxedClass(fromNativeType.getDeclaredType());
if (!boxedType.isAssignableFrom(fromNativeMethod.getReturnType()))
mv.checkcast(p(boxedType));
unboxNumber(
mv, boxedType, fromNativeType.getDeclaredType(), fromNativeType.getNativeType());
} else if (!fromNativeType
.getDeclaredType()
.isAssignableFrom(fromNativeMethod.getReturnType())) {
mv.checkcast(p(fromNativeType.getDeclaredType()));
}
} else if (!fromNativeType.getDeclaredType().isPrimitive()) {
Class unboxedType = unboxedType(fromNativeType.getDeclaredType());
convertPrimitive(mv, nativeClass, unboxedType, fromNativeType.getNativeType());
boxValue(builder, mv, fromNativeType.getDeclaredType(), unboxedType);
}
}
public static ClassVisitor newCheckClassAdapter(ClassVisitor cv) {
try {
Class<? extends ClassVisitor> tmvClass =
Class.forName("org.objectweb.asm.util.CheckClassAdapter").asSubclass(ClassVisitor.class);
Constructor<? extends ClassVisitor> c = tmvClass.getDeclaredConstructor(ClassVisitor.class);
return c.newInstance(cv);
} catch (Throwable t) {
return cv;
}
}
public static ClassVisitor newTraceClassVisitor(PrintWriter out) {
try {
Class<? extends ClassVisitor> tmvClass =
Class.forName("org.objectweb.asm.util.TraceClassVisitor").asSubclass(ClassVisitor.class);
Constructor<? extends ClassVisitor> c = tmvClass.getDeclaredConstructor(PrintWriter.class);
return c.newInstance(out);
} catch (Throwable t) {
throw new RuntimeException(t);
}
}
public static MethodVisitor newTraceMethodVisitor(MethodVisitor mv) {
try {
Class<? extends MethodVisitor> tmvClass =
Class.forName("org.objectweb.asm.util.TraceMethodVisitor")
.asSubclass(MethodVisitor.class);
Constructor<? extends MethodVisitor> c = tmvClass.getDeclaredConstructor(MethodVisitor.class);
return c.newInstance(mv);
} catch (Throwable t) {
return mv;
}
}
static void emitReturn(
AsmBuilder builder, SkinnyMethodAdapter mv, Class returnType, Class nativeIntType) {
if (returnType.isPrimitive()) {
if (long.class == returnType) {
mv.lreturn();
} else if (float.class == returnType) {
mv.freturn();
} else if (double.class == returnType) {
mv.dreturn();
} else if (void.class == returnType) {
mv.voidreturn();
} else {
mv.ireturn();
}
} else {
boxValue(builder, mv, returnType, nativeIntType);
mv.areturn();
}
}
private static boolean classIsVisible(ClassLoader classLoader, Class klass) {
try {
return classLoader.loadClass(klass.getName()) == klass;
} catch (ClassNotFoundException cnfe) {
return false;
}
}
static boolean isDelegate(Class klass) {
for (Method m : klass.getMethods()) {
if (m.isAnnotationPresent(Delegate.class)) {
return true;
}
}
return false;
}
static Method getToNativeMethod(ToNativeType toNativeType, AsmClassLoader classLoader) {
ToNativeConverter toNativeConverter = toNativeType.getToNativeConverter();
if (toNativeConverter == null) {
return null;
}
try {
Class<? extends ToNativeConverter> toNativeConverterClass = toNativeConverter.getClass();
if (Modifier.isPublic(toNativeConverterClass.getModifiers())) {
for (Method method : toNativeConverterClass.getMethods()) {
if (!method.getName().equals("toNative")) continue;
Class[] methodParameterTypes = method.getParameterTypes();
if (toNativeConverter.nativeType().isAssignableFrom(method.getReturnType())
&& methodParameterTypes.length == 2
&& methodParameterTypes[0].isAssignableFrom(toNativeType.getDeclaredType())
&& methodParameterTypes[1] == ToNativeContext.class
&& methodIsAccessible(method)
&& classIsVisible(classLoader, method.getDeclaringClass())) {
return method;
}
}
}
Method method =
toNativeConverterClass.getMethod("toNative", Object.class, ToNativeContext.class);
return methodIsAccessible(method) && classIsVisible(classLoader, method.getDeclaringClass())
? method
: ToNativeConverter.class.getDeclaredMethod(
"toNative", Object.class, ToNativeContext.class);
} catch (NoSuchMethodException nsme) {
try {
return ToNativeConverter.class.getDeclaredMethod(
"toNative", Object.class, ToNativeContext.class);
} catch (NoSuchMethodException nsme2) {
throw new RuntimeException(
"internal error. " + ToNativeConverter.class + " has no toNative() method");
}
}
}
static void emitReturnOp(SkinnyMethodAdapter mv, Class returnType) {
if (!returnType.isPrimitive()) {
mv.areturn();
} else if (long.class == returnType) {
mv.lreturn();
} else if (float.class == returnType) {
mv.freturn();
} else if (double.class == returnType) {
mv.dreturn();
} else if (void.class == returnType) {
mv.voidreturn();
} else {
mv.ireturn();
}
}
static void store(SkinnyMethodAdapter mv, Class type, LocalVariable var) {
if (!type.isPrimitive()) {
mv.astore(var);
} else if (long.class == type) {
mv.lstore(var);
} else if (double.class == type) {
mv.dstore(var);
} else if (float.class == type) {
mv.fstore(var);
} else {
mv.istore(var);
}
}
static void load(SkinnyMethodAdapter mv, Class parameterType, LocalVariable parameter) {
if (!parameterType.isPrimitive()) {
mv.aload(parameter);
} else if (long.class == parameterType) {
mv.lload(parameter);
} else if (float.class == parameterType) {
mv.fload(parameter);
} else if (double.class == parameterType) {
mv.dload(parameter);
} else {
mv.iload(parameter);
}
}
static Method getFromNativeMethod(FromNativeType fromNativeType, AsmClassLoader classLoader) {
FromNativeConverter fromNativeConverter = fromNativeType.getFromNativeConverter();
if (fromNativeConverter == null) {
return null;
}
try {
Class<? extends FromNativeConverter> fromNativeConverterClass =
fromNativeConverter.getClass();
if (Modifier.isPublic(fromNativeConverterClass.getModifiers())) {
for (Method method : fromNativeConverterClass.getMethods()) {
if (!method.getName().equals("fromNative")) continue;
Class[] methodParameterTypes = method.getParameterTypes();
Class javaType =
fromNativeType.getDeclaredType().isPrimitive()
? boxedType(fromNativeType.getDeclaredType())
: fromNativeType.getDeclaredType();
if (javaType.isAssignableFrom(method.getReturnType())
&& methodParameterTypes.length == 2
&& methodParameterTypes[0].isAssignableFrom(fromNativeConverter.nativeType())
&& methodParameterTypes[1] == FromNativeContext.class
&& methodIsAccessible(method)
&& classIsVisible(classLoader, method.getDeclaringClass())) {
return method;
}
}
}
Method method =
fromNativeConverterClass.getMethod("fromNative", Object.class, FromNativeContext.class);
return methodIsAccessible(method) && classIsVisible(classLoader, method.getDeclaringClass())
? method
: FromNativeConverter.class.getDeclaredMethod(
"fromNative", Object.class, FromNativeContext.class);
} catch (NoSuchMethodException nsme) {
try {
return FromNativeConverter.class.getDeclaredMethod(
"fromNative", Object.class, FromNativeContext.class);
} catch (NoSuchMethodException nsme2) {
throw new RuntimeException(
"internal error. " + FromNativeConverter.class + " has no fromNative() method");
}
}
}
static void boxValue(
AsmBuilder builder, SkinnyMethodAdapter mv, Class boxedType, Class unboxedType) {
if (boxedType == unboxedType || boxedType.isPrimitive()) {
} else if (Boolean.class.isAssignableFrom(boxedType)) {
narrow(mv, unboxedType, boolean.class);
mv.invokestatic(Boolean.class, "valueOf", Boolean.class, boolean.class);
} else if (Pointer.class.isAssignableFrom(boxedType)) {
getfield(mv, builder, builder.getRuntimeField());
mv.invokestatic(
AsmRuntime.class, "pointerValue", Pointer.class, unboxedType, jnr.ffi.Runtime.class);
} else if (Address.class == boxedType) {
mv.invokestatic(boxedType, "valueOf", boxedType, unboxedType);
} else if (Number.class.isAssignableFrom(boxedType) && boxedType(unboxedType) == boxedType) {
mv.invokestatic(boxedType, "valueOf", boxedType, unboxedType);
} else {
throw new IllegalArgumentException(
"cannot box value of type " + unboxedType + " to " + boxedType);
}
}
