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An Execution Environment for Java SCOREs
package foundation.icon.ee.util;
import foundation.icon.ee.struct.Property;
import foundation.icon.ee.types.Address;
import i.IObject;
import i.IObjectArray;
import i.RuntimeAssertionError;
import pi.UnmodifiableArrayList;
import pi.UnmodifiableArrayMap;
import java.lang.reflect.InvocationTargetException;
import java.math.BigInteger;
import java.util.Map;
public class Shadower {
/**
* Shadows internal objects according to a shadow class.
*
* @param obj internal object. Map, array, byte[], Address, String, Boolean,
* BigInteger.
* @param c shadow class
* @param shadow class
* @return shadow object
* @throws IllegalArgumentException thrown if obj and c does not match
* correctly or obj is not a valid parameter/return object or c is
* not a valid parameter/return class.
*/
public static T shadow(Object obj, Class c) {
@SuppressWarnings("unchecked")
T res = (T) shadowImpl(obj, c);
return res;
}
// throws IllegalArgumentException
public static Object[] shadowObjects(Object[] objs, Class[] c) {
if (objs.length != c.length) {
throw new IllegalArgumentException();
}
var res = new Object[objs.length];
for (int i = 0; i < objs.length; ++i) {
res[i] = shadowImpl(objs[i], c[i]);
}
return res;
}
public static U shadowReturnValue(Object obj, Class c) {
if (obj == null) {
return null;
} else if (c.isPrimitive()) {
@SuppressWarnings("unchecked")
U res = (U) shadowPrimitiveReturnValue(obj, c);
return res;
}
@SuppressWarnings("unchecked")
U res = (U) shadowImpl(obj, c);
return res;
}
private static i.IObjectArray newObjectArray(Class c, int l) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
var post = c.getName().substring(2);
int i = 0;
for (; i < post.length(); ++i) {
if (post.charAt(i) != '_') {
break;
}
}
post = post.substring(i); // skip _
var aName = "a." + "$".repeat(i) + post;
Class aClass = null;
aClass = c.getClassLoader().loadClass(aName);
var m = aClass.getMethod("initArray", int.class);
return (i.IObjectArray) m.invoke(null, l);
}
// called only for ObjectArray
private static Class getElementClass(Class cls) throws ClassNotFoundException {
// a.$$I : int[][]
// w.__Lu.user.Class : interface for u.user.Class[][]
// a.$$Lu.user.Class : class for u.user.Class[][]
var elem = cls.getName().substring(3);
if (elem.startsWith("$")) {
switch (elem) {
case "$Z":
return a.BooleanArray.class;
case "$C":
return a.CharArray.class;
case "$B":
return a.ByteArray.class;
case "$S":
return a.ShortArray.class;
case "$I":
return a.IntArray.class;
case "$J":
return a.LongArray.class;
}
elem = "a.$" + elem.substring(1);
} else if (elem.startsWith("_")) {
elem = "w._" + elem.substring(1);
} else {
// starts with 'L'
elem = elem.substring(1);
}
return cls.getClassLoader().loadClass(elem);
}
private static Object shadowImpl(Object obj, Class c) {
try {
return _shadow(obj, c);
} catch (ClassCastException e) {
throw new IllegalArgumentException(e);
}
}
private static IObject shadowPrimitiveReturnValue(Object obj, Class c) {
if (c == boolean.class) {
return s.java.lang.Boolean.avm_valueOf((Boolean) obj);
} else if(c == char.class) {
return s.java.lang.Character.avm_valueOf(
(char)((BigInteger)obj).intValue());
} else if(c == byte.class) {
return s.java.lang.Byte.avm_valueOf(((BigInteger)obj).byteValue());
} else if(c == short.class) {
return s.java.lang.Short.avm_valueOf(((BigInteger)obj).shortValue());
} else if(c == int.class) {
return s.java.lang.Integer.avm_valueOf(((BigInteger)obj).intValue());
} else if(c == long.class) {
return s.java.lang.Long.avm_valueOf(((BigInteger)obj).longValue());
}
return null;
}
private static Object _shadow(Object obj, Class c) {
if (obj == null) {
return null;
} else if (c == boolean.class) {
return obj;
} else if (c == char.class) {
return (char) ((BigInteger) obj).intValue();
} else if (c == byte.class) {
return ((BigInteger) obj).byteValue();
} else if (c == short.class) {
return ((BigInteger) obj).shortValue();
} else if (c == int.class) {
return ((BigInteger) obj).intValue();
} else if (c == long.class) {
return ((BigInteger) obj).longValue();
} else if (c == s.java.lang.Boolean.class) {
return s.java.lang.Boolean.avm_valueOf((Boolean) obj);
} else if (c == s.java.lang.Character.class) {
return s.java.lang.Character.avm_valueOf(
(char)((BigInteger)obj).intValue());
} else if (c == s.java.lang.Byte.class) {
return s.java.lang.Byte.avm_valueOf(((BigInteger)obj).byteValue());
} else if (c == s.java.lang.Short.class) {
return s.java.lang.Short.avm_valueOf(((BigInteger)obj).shortValue());
} else if (c == s.java.lang.Integer.class) {
return s.java.lang.Integer.avm_valueOf(((BigInteger)obj).intValue());
} else if (c == s.java.lang.Long.class) {
return s.java.lang.Long.avm_valueOf(((BigInteger)obj).longValue());
} else if (c == s.java.math.BigInteger.class) {
return s.java.math.BigInteger.newWithCharge((BigInteger)obj);
} else if (c == s.java.lang.String.class) {
return s.java.lang.String.newWithCharge((String)obj);
} else if (c == p.score.Address.class) {
return p.score.Address.newWithCharge(((Address)obj).toByteArray());
} else if (c == a.BooleanArray.class) {
var o = (Object[]) obj;
var res = a.BooleanArray.initArray(o.length);
for (int i=0; i elemClass = null;
try {
elemClass = getElementClass(c);
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException(e);
}
for (int i = 0; i < o.length; ++i) {
res.set(i, _shadow(o[i], elemClass));
}
return res;
} else if (c == s.java.util.List.class) {
var o = (Object[]) obj;
var sa = new IObject[o.length];
int i = 0;
for (var e : o) {
sa[i++] = shadow(e);
}
return new UnmodifiableArrayList<>(sa);
} else if (c == s.java.util.Map.class) {
var o = (Map) obj;
var skv = new IObject[o.size() * 2];
int i = 0;
for (var e : o.entrySet()) {
skv[i++] = shadow(e.getKey());
skv[i++] = shadow(e.getValue());
}
return new UnmodifiableArrayMap<>(skv);
} else {
// this must be a writable struct
try {
@SuppressWarnings("unchecked")
var o = (Map) obj;
var ctor = c.getConstructor();
var res = ctor.newInstance();
for (var e : o.entrySet()) {
var wp = Property.getWritableProperty(c, e.getKey());
if (wp == null) {
throw new IllegalArgumentException();
}
wp.set(res, _shadow(e.getValue(), wp.getType()));
}
return res;
} catch (NoSuchMethodException
| IllegalAccessException
| InstantiationException
| InvocationTargetException e) {
throw new IllegalArgumentException();
}
}
}
/**
* Shadows internal objects.
* @param obj internal object
* @return shadow object
*/
public static s.java.lang.Object shadow(Object obj) {
if (obj==null) {
return null;
} else if (obj instanceof Boolean) {
return s.java.lang.Boolean.avm_valueOf((Boolean) obj);
} else if (obj instanceof BigInteger) {
return s.java.math.BigInteger.newWithCharge((BigInteger)obj);
} else if (obj instanceof String) {
return s.java.lang.String.newWithCharge((String)obj);
} else if (obj instanceof byte[]) {
return a.ByteArray.newWithCharge((byte[])obj);
} else if (obj instanceof Address) {
return p.score.Address.newWithCharge(((Address)obj).toByteArray());
} else if (obj instanceof Object[]) {
var o = (Object[]) obj;
var sa = new IObject[o.length];
int i = 0;
for (var e : o) {
sa[i++] = Shadower.shadow(e);
}
return new UnmodifiableArrayList<>(sa);
} else if (obj instanceof Map) {
var o = (Map) obj;
var skv = new IObject[o.size() * 2];
int i = 0;
for (Map.Entry e : o.entrySet()) {
skv[i++] = shadow(e.getKey());
skv[i++] = shadow(e.getValue());
}
return new UnmodifiableArrayMap<>(skv);
} else {
RuntimeAssertionError.unreachable("invalid shadow type");
return null;
}
}
}
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