static ElementInfo getCheckedElementInfo(
MJIEnv env, FieldInfo fi, int fobjRef, Class<?> fiType, String type) {
ElementInfo ei;
if (!isAvailable(env, fi, fobjRef)) {
return null;
}
if (fi.isStatic()) {
ei = fi.getClassInfo().getStaticElementInfo();
} else { // instance field
ei = env.getElementInfo(fobjRef);
}
// our guards (still need IllegalAccessException)
if (ei == null) {
env.throwException("java.lang.NullPointerException");
return null;
}
if (fiType != null && !fiType.isInstance(fi)) {
env.throwException(
"java.lang.IllegalArgumentException", "field type incompatible with " + type);
return null;
}
return ei;
}
static ElementInfo getCheckedElementInfo(
MJIEnv env,
int objRef,
FieldInfo fi,
int fobjRef,
Class<?> fiType,
String type,
boolean isWrite,
FeatureExpr ctx) {
ElementInfo ei;
if (!isAvailable(env, fi, fobjRef, ctx)) {
return null;
}
if (fi.isStatic()) {
ClassInfo fci = fi.getClassInfo();
ei = isWrite ? fci.getModifiableStaticElementInfo() : fci.getStaticElementInfo();
} else { // instance field
ei = isWrite ? env.getModifiableElementInfo(fobjRef) : env.getElementInfo(fobjRef);
}
// our guards (still need IllegalAccessException)
if (fi.isPrivate() && !env.getBooleanField(objRef, "isAccessible").getValue()) {
env.throwException(ctx, IllegalAccessException.class.getName(), fi + "");
return null;
}
if (ei == null) {
env.throwException(ctx, "java.lang.NullPointerException");
return null;
}
if (fiType != null) {
if (fiType == ByteFieldInfo.class) {
if (fi.isByteField()) {
return ei;
}
} else if (fiType == ShortFieldInfo.class) {
if (fi.isShortField()) {
return ei;
}
} else if (fiType == IntegerFieldInfo.class) {
if (fi.isIntField()) {
return ei;
}
} else if (fiType == LongFieldInfo.class) {
if (fi.isLongField()) {
return ei;
}
} else if (fiType == FloatFieldInfo.class) {
if (fi.isFloatField()) {
return ei;
}
}
if (!fiType.isInstance(fi)) {
env.throwException(
ctx,
"java.lang.IllegalArgumentException",
"field type " + fi.getType() + " incompatible with " + type);
return null;
}
}
return ei;
}
private static boolean setValue(MJIEnv env, FieldInfo fi, int obj, int value, Object attr) {
ClassInfo fieldClassInfo = fi.getClassInfo();
String className = fieldClassInfo.getName();
String fieldType = fi.getType();
try {
ClassInfo tci = fi.getTypeClassInfo();
if (tci.isPrimitive()) {
if (value == MJIEnv.NULL) {
return false;
}
// checks whether unboxing can be done by accessing the field "value"
final String fieldName = "value";
FieldInfo finfo = env.getElementInfo(value).getFieldInfo(fieldName);
if (finfo == null) {
return false;
}
ElementInfo ei =
fi.isStatic() ? fi.getClassInfo().getStaticElementInfo() : env.getElementInfo(obj);
ei.setFieldAttr(fi, attr);
if ("boolean".equals(fieldType)) {
boolean val = env.getBooleanField(value, fieldName);
ei.setBooleanField(fi, val);
return true;
} else if ("byte".equals(fieldType)) {
byte val = env.getByteField(value, fieldName);
ei.setByteField(fi, val);
return true;
} else if ("char".equals(fieldType)) {
char val = env.getCharField(value, fieldName);
ei.setCharField(fi, val);
return true;
} else if ("short".equals(fieldType)) {
short val = env.getShortField(value, fieldName);
ei.setShortField(fi, val);
return true;
} else if ("int".equals(fieldType)) {
int val = env.getIntField(value, fieldName);
ei.setIntField(fi, val);
return true;
} else if ("long".equals(fieldType)) {
long val = env.getLongField(value, fieldName);
ei.setLongField(fi, val);
return true;
} else if ("float".equals(fieldType)) {
float val = env.getFloatField(value, fieldName);
ei.setFloatField(fi, val);
return true;
} else if ("double".equals(fieldType)) {
double val = env.getDoubleField(value, fieldName);
ei.setDoubleField(fi, val);
return true;
} else {
return false;
}
} else { // it's a reference
if (value != MJIEnv.NULL) {
String type = env.getTypeName(value);
// this is an instance so the ClassInfo has to be registered
ClassInfo valueCI = ClassInfo.getResolvedClassInfo(type);
if (!valueCI.isInstanceOf(tci)) {
return false;
}
}
ElementInfo ei =
fi.isStatic() ? fi.getClassInfo().getStaticElementInfo() : env.getElementInfo(obj);
ei.setFieldAttr(fi, attr);
if (fi.isStatic()) {
env.setStaticReferenceField(className, fi.getName(), value);
} else {
env.setReferenceField(obj, fi.getName(), value);
}
return true;
}
} catch (NoClassInfoException cx) {
env.throwException("java.lang.NoClassDefFoundError", cx.getMessage());
return false;
}
}
private static boolean setValue(
FeatureExpr ctx, MJIEnv env, FieldInfo fi, int obj, int value, Object attr) {
ClassInfo fieldClassInfo = fi.getClassInfo();
String className = fieldClassInfo.getName();
String fieldType = fi.getType();
ClassInfo tci = fi.getTypeClassInfo();
ElementInfo ei = null;
if (fi.isStatic()) {
ei = fi.getClassInfo().getModifiableStaticElementInfo();
} else {
ei = env.getModifiableElementInfo(obj);
}
if (tci.isPrimitive()) {
if (value == MJIEnv.NULL) {
return false;
}
// checks whether unboxing can be done by accessing the field "value"
final String fieldName = "value";
FieldInfo finfo = env.getElementInfo(value).getFieldInfo(fieldName);
if (finfo == null) {
return false;
}
ei.setFieldAttr(fi, attr);
if ("boolean".equals(fieldType)) {
Conditional<Boolean> val = env.getBooleanField(value, fieldName);
ei.setBooleanField(ctx, fi, val);
return true;
} else if ("byte".equals(fieldType)) {
Conditional<Byte> val = env.getByteField(value, fieldName);
ei.setByteField(ctx, fi, val);
return true;
} else if ("char".equals(fieldType)) {
Conditional<Character> val = env.getCharField(value, fieldName);
ei.setCharField(ctx, fi, val);
return true;
} else if ("short".equals(fieldType)) {
Conditional<Short> val = env.getShortField(value, fieldName);
ei.setShortField(ctx, fi, val);
return true;
} else if ("int".equals(fieldType)) {
Conditional<Integer> val = env.getIntField(value, fieldName);
ei.setIntField(ctx, fi, val);
return true;
} else if ("long".equals(fieldType)) {
Conditional<Long> val = env.getLongField(value, fieldName);
ei.setLongField(ctx, fi, val);
return true;
} else if ("float".equals(fieldType)) {
Conditional<Float> val = env.getFloatField(value, fieldName);
ei.setFloatField(ctx, fi, val);
return true;
} else if ("double".equals(fieldType)) {
Conditional<Double> val = env.getDoubleField(value, fieldName);
ei.setDoubleField(ctx, fi, val);
return true;
} else {
return false;
}
} else { // it's a reference
if (value != MJIEnv.NULL) {
ClassInfo ciValue = env.getClassInfo(value);
if (!ciValue.isInstanceOf(tci)) {
return false;
}
}
ei.setFieldAttr(fi, attr);
if (fi.isStatic()) {
env.setStaticReferenceField(ctx, className, fi.getName(), value);
} else {
env.setReferenceField(ctx, obj, fi.getName(), value);
}
return true;
}
}