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;
}
@MJI
public short parseShort__Ljava_lang_String_2I__S(
MJIEnv env, int clsObjRef, int strRef, int radix, FeatureExpr ctx) {
try {
return Short.parseShort(env.getStringObject(ctx, strRef), radix);
} catch (NumberFormatException e) {
env.throwException(ctx, "java.lang.NumberFormatException");
return 0;
}
}
@MJI
public int parseInt__Ljava_lang_String_2__I(
MJIEnv env, int clsObjRef, int strRef, FeatureExpr ctx) {
try {
return Integer.parseInt(env.getStringObject(ctx, strRef));
} catch (NumberFormatException e) {
env.throwException(ctx, "java.lang.NumberFormatException");
return 0;
}
}
@MJI
public byte readByte____B(MJIEnv env, int this_ptr, FeatureExpr ctx) {
long current_posn = env.getLongField(this_ptr, current_position).getValue();
long current_len = env.getLongField(this_ptr, current_length).getValue();
int chunk_size = env.getStaticIntField(RandomAccessFile, CHUNK_SIZE);
if (current_posn >= current_len) {
env.throwException(ctx, EOFException);
}
int chunk = findDataChunk(env, this_ptr, current_posn, chunk_size, ctx);
byte result = getDataValue(env, chunk, current_posn, chunk_size, ctx);
env.setLongField(ctx, this_ptr, current_position, new One<>(current_posn + 1));
return result;
}
/** * Peer method for the <code>java.lang.reflect.Field.set</code> method. * * @author Mirko Stojmenovic ([email protected]) * @author Igor Andjelkovic ([email protected]) * @author Milos Gligoric ([email protected]) */ public static void set__Ljava_lang_Object_2Ljava_lang_Object_2__V( MJIEnv env, int objRef, int fobjRef, int val) { FieldInfo fi = getFieldInfo(env, objRef); int modifiers = fi.getModifiers(); if (!isAvailable(env, fi, fobjRef)) { return; } if (Modifier.isFinal(modifiers)) { env.throwException("java.lang.IllegalAccessException", "field " + fi.getName() + " is final"); return; } ClassInfo ci = fi.getClassInfo(); ClassInfo cio = env.getClassInfo(fobjRef); if (!fi.isStatic() && !cio.isInstanceOf(ci)) { env.throwException( "java.lang.IllegalArgumentException", fi.getType() + "field " + fi.getName() + " does not belong to this object"); return; } Object[] attrs = env.getArgAttributes(); Object attr = (attrs == null) ? null : attrs[2]; if (!setValue(env, fi, fobjRef, val, attr)) { env.throwException( "java.lang.IllegalArgumentException", "Can not set " + fi.getType() + " field " + fi.getFullName() + " to " + ((MJIEnv.NULL != val) ? env.getClassInfo(val).getName() + " object " : "null")); } }
@MJI
public int get__Ljava_lang_Object_2__Ljava_lang_Object_2(
MJIEnv env, int objRef, int fobjRef, FeatureExpr ctx) {
FieldInfo fi = getFieldInfo(ctx, env, objRef);
ElementInfo ei =
getCheckedElementInfo(
env, objRef, fi, fobjRef, null, null, false, ctx); // no type check here
if (ei == null) {
return 0;
}
if (!(fi instanceof ReferenceFieldInfo)) { // primitive type, we need to box it
if (fi instanceof DoubleFieldInfo) {
Conditional<Double> d = ei.getDoubleField(fi);
return env.newDouble(ctx, d);
} else if (fi instanceof FloatFieldInfo) {
Conditional<Float> f = ei.getFloatField(fi);
return env.newFloat(ctx, f);
} else if (fi instanceof LongFieldInfo) {
Conditional<Long> l = ei.getLongField(fi);
return env.newLong(ctx, l);
} else if (fi instanceof IntegerFieldInfo) {
// this might actually represent a plethora of types
Conditional<Integer> i = ei.getIntField(fi);
return env.newInteger(ctx, i);
} else if (fi instanceof BooleanFieldInfo) {
Conditional<Boolean> b = ei.getBooleanField(fi);
return env.newBoolean(b.getValue());
} else if (fi instanceof ByteFieldInfo) {
Conditional<Byte> z = ei.getByteField(fi);
return env.newByte(ctx, z);
} else if (fi instanceof CharFieldInfo) {
Conditional<Character> c = ei.getCharField(fi);
return env.newCharacter(ctx, c);
} else if (fi instanceof ShortFieldInfo) {
Conditional<Short> s = ei.getShortField(fi);
return env.newShort(ctx, s);
}
} else { // it's a reference
int ref = ei.getReferenceField(fi).simplify(ctx).getValue(); // we internally store it as int
return ref;
}
env.throwException(ctx, "java.lang.IllegalArgumentException", "unknown field type");
return MJIEnv.NULL;
}
/** >2do> that doesn't take care of class init yet */
public static int getType____Ljava_lang_Class_2(MJIEnv env, int objRef) {
ThreadInfo ti = env.getThreadInfo();
FieldInfo fi = getFieldInfo(env, objRef);
try {
ClassInfo ci = fi.getTypeClassInfo();
if (!ci.isRegistered()) {
ci.registerClass(ti);
}
return ci.getClassObjectRef();
} catch (NoClassInfoException cx) {
env.throwException("java.lang.NoClassDefFoundError", cx.getMessage());
return MJIEnv.NULL;
}
}
static boolean isAvailable(MJIEnv env, FieldInfo fi, int fobjRef) {
if (fi.isStatic()) {
ClassInfo fci = fi.getClassInfo();
if (fci.requiresClinitExecution(env.getThreadInfo())) {
env.repeatInvocation();
return false;
}
} else {
if (fobjRef == MJIEnv.NULL) {
env.throwException("java.lang.NullPointerException");
return false;
}
// class had obviously been initialized, otherwise we won't have an instance of it
}
return true;
}
public static int get__Ljava_lang_Object_2__Ljava_lang_Object_2(
MJIEnv env, int objRef, int fobjRef) {
FieldInfo fi = getFieldInfo(env, objRef);
ElementInfo ei = getCheckedElementInfo(env, fi, fobjRef, null, null); // no type check here
if (ei == null) {
return 0;
}
if (!(fi instanceof ReferenceFieldInfo)) { // primitive type, we need to box it
if (fi instanceof DoubleFieldInfo) {
double d = ei.getDoubleField(fi);
return env.newDouble(d);
} else if (fi instanceof FloatFieldInfo) {
float f = ei.getFloatField(fi);
return env.newFloat(f);
} else if (fi instanceof LongFieldInfo) {
long l = ei.getLongField(fi);
return env.newLong(l);
} else if (fi instanceof IntegerFieldInfo) {
// this might actually represent a plethora of types
int i = ei.getIntField(fi);
return env.newInteger(i);
} else if (fi instanceof BooleanFieldInfo) {
boolean b = ei.getBooleanField(fi);
return env.newBoolean(b);
} else if (fi instanceof ByteFieldInfo) {
byte z = ei.getByteField(fi);
return env.newByte(z);
} else if (fi instanceof CharFieldInfo) {
char c = ei.getCharField(fi);
return env.newCharacter(c);
} else if (fi instanceof ShortFieldInfo) {
short s = ei.getShortField(fi);
return env.newShort(s);
}
} else { // it's a reference
int ref = ei.getReferenceField(fi); // we internally store it as int
return ref;
}
env.throwException("java.lang.IllegalArgumentException", "unknown field type");
return MJIEnv.NULL;
}
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;
}
}
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;
}
/** * Peer method for the <code>java.lang.reflect.Field.set</code> method. * * @author Mirko Stojmenovic ([email protected]) * @author Igor Andjelkovic ([email protected]) * @author Milos Gligoric ([email protected]) */ @MJI public void set__Ljava_lang_Object_2Ljava_lang_Object_2__V( MJIEnv env, int objRef, int fobjRef, int val, FeatureExpr ctx) { FieldInfo fi = getFieldInfo(ctx, env, objRef); if (!isAvailable(env, fi, fobjRef, ctx)) { return; } if (fi.isFinal() && fi.isStatic()) { env.throwException( ctx, IllegalAccessException.class.getName(), "Can not set static final " + fi.getType() + " field " + fi.getFullName()); return; } if (!env.getBooleanField(objRef, "isAccessible").getValue() && fi.isFinal()) { env.throwException( ctx, IllegalAccessException.class.getName(), "Can not set final " + fi.getType() + " field " + fi.getFullName()); return; } ClassInfo ci = fi.getClassInfo(); ClassInfo cio = env.getClassInfo(fobjRef); if (!fi.isStatic() && !cio.isInstanceOf(ci)) { env.throwException( ctx, IllegalAccessException.class.getName(), fi.getType() + "field " + fi.getName() + " does not belong to this object"); return; } if (!env.getBooleanField(objRef, "isAccessible").getValue()) { if (!fi.isStatic() && cio.isInstanceOf(ci)) { if (!fi.isPublic()) { env.throwException( ctx, IllegalAccessException.class.getName(), fi.getType() + " field " + fi.getName()); return; } } else { if (!fi.isPublic()) { env.throwException( ctx, IllegalAccessException.class.getName(), fi.getType() + " field " + fi.getName()); return; } } } Object[] attrs = env.getArgAttributes(); Object attr = (attrs == null) ? null : attrs[2]; if (!setValue(ctx, env, fi, fobjRef, val, attr)) { env.throwException( ctx, IllegalAccessException.class.getName(), "Can not set " + fi.getType() + " field " + fi.getFullName() + " to " + ((MJIEnv.NULL != val) ? env.getClassInfo(val).getName() + " object " : "null")); } }
