public Object getDefaultValue(Class<?> hint) {
Object value;
if (hint == null) {
if (javaObject instanceof Boolean) {
hint = ScriptRuntime.BooleanClass;
}
}
if (hint == null || hint == ScriptRuntime.StringClass) {
value = javaObject.toString();
} else {
String converterName;
if (hint == ScriptRuntime.BooleanClass) {
converterName = "booleanValue";
} else if (hint == ScriptRuntime.NumberClass) {
converterName = "doubleValue";
} else {
throw Context.reportRuntimeError0("msg.default.value");
}
Object converterObject = get(converterName, this);
if (converterObject instanceof Function) {
Function f = (Function) converterObject;
value = f.call(Context.getContext(), f.getParentScope(), this, ScriptRuntime.emptyArgs);
} else {
if (hint == ScriptRuntime.NumberClass && javaObject instanceof Boolean) {
boolean b = ((Boolean) javaObject).booleanValue();
value = ScriptRuntime.wrapNumber(b ? 1.0 : 0.0);
} else {
value = javaObject.toString();
}
}
}
return value;
}
void put(Scriptable scope, String name, Object javaObject, Object value, boolean isStatic) {
Map<String, Object> ht = isStatic ? staticMembers : members;
Object member = ht.get(name);
if (!isStatic && member == null) {
// Try to get static member from instance (LC3)
member = staticMembers.get(name);
}
if (member == null) throw reportMemberNotFound(name);
if (member instanceof FieldAndMethods) {
FieldAndMethods fam = (FieldAndMethods) ht.get(name);
member = fam.field;
}
// Is this a bean property "set"?
if (member instanceof BeanProperty) {
BeanProperty bp = (BeanProperty) member;
if (bp.setter == null) {
throw reportMemberNotFound(name);
}
// If there's only one setter or if the value is null, use the
// main setter. Otherwise, let the NativeJavaMethod decide which
// setter to use:
if (bp.setters == null || value == null) {
Class<?> setType = bp.setter.argTypes[0];
Object[] args = {Context.jsToJava(value, setType)};
try {
bp.setter.invoke(javaObject, args);
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
} else {
Object[] args = {value};
bp.setters.call(
Context.getContext(), ScriptableObject.getTopLevelScope(scope), scope, args);
}
} else {
if (!(member instanceof Field)) {
String str = (member == null) ? "msg.java.internal.private" : "msg.java.method.assign";
throw Context.reportRuntimeError1(str, name);
}
Field field = (Field) member;
Object javaValue = Context.jsToJava(value, field.getType());
try {
field.set(javaObject, javaValue);
} catch (IllegalAccessException accessEx) {
if ((field.getModifiers() & Modifier.FINAL) != 0) {
// treat Java final the same as JavaScript [[READONLY]]
return;
}
throw Context.throwAsScriptRuntimeEx(accessEx);
} catch (IllegalArgumentException argEx) {
throw Context.reportRuntimeError3(
"msg.java.internal.field.type",
value.getClass().getName(),
field,
javaObject.getClass().getName());
}
}
}
@Override
public Object getDefaultValue(Class<?> hint) {
if (hint == ScriptRuntime.FunctionClass) return this;
Object rval;
Class<?> type;
try {
rval = field.get(javaObject);
type = field.getType();
} catch (IllegalAccessException accEx) {
throw Context.reportRuntimeError1("msg.java.internal.private", field.getName());
}
Context cx = Context.getContext();
rval = cx.getWrapFactory().wrap(cx, this, rval, type);
if (rval instanceof Scriptable) {
rval = ((Scriptable) rval).getDefaultValue(hint);
}
return rval;
}
Object get(Scriptable scope, String name, Object javaObject, boolean isStatic) {
Map<String, Object> ht = isStatic ? staticMembers : members;
Object member = ht.get(name);
if (!isStatic && member == null) {
// Try to get static member from instance (LC3)
member = staticMembers.get(name);
}
if (member == null) {
member =
this.getExplicitFunction(
scope, name,
javaObject, isStatic);
if (member == null) return Scriptable.NOT_FOUND;
}
if (member instanceof Scriptable) {
return member;
}
Context cx = Context.getContext();
Object rval;
Class<?> type;
try {
if (member instanceof BeanProperty) {
BeanProperty bp = (BeanProperty) member;
if (bp.getter == null) return Scriptable.NOT_FOUND;
rval = bp.getter.invoke(javaObject, Context.emptyArgs);
type = bp.getter.method().getReturnType();
} else {
Field field = (Field) member;
rval = field.get(isStatic ? null : javaObject);
type = field.getType();
}
} catch (Exception ex) {
throw Context.throwAsScriptRuntimeEx(ex);
}
// Need to wrap the object before we return it.
scope = ScriptableObject.getTopLevelScope(scope);
return cx.getWrapFactory().wrap(cx, scope, rval, type);
}
/** Type-munging for field setting and method invocation. Conforms to LC3 specification */
static Object coerceTypeImpl(Class<?> type, Object value) {
if (value != null && value.getClass() == type) {
return value;
}
switch (getJSTypeCode(value)) {
case JSTYPE_NULL:
// raise error if type.isPrimitive()
if (type.isPrimitive()) {
reportConversionError(value, type);
}
return null;
case JSTYPE_UNDEFINED:
if (type == ScriptRuntime.StringClass || type == ScriptRuntime.ObjectClass) {
return "undefined";
} else {
reportConversionError("undefined", type);
}
break;
case JSTYPE_BOOLEAN:
// Under LC3, only JS Booleans can be coerced into a Boolean value
if (type == Boolean.TYPE
|| type == ScriptRuntime.BooleanClass
|| type == ScriptRuntime.ObjectClass) {
return value;
} else if (type == ScriptRuntime.StringClass) {
return value.toString();
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_NUMBER:
if (type == ScriptRuntime.StringClass) {
return ScriptRuntime.toString(value);
} else if (type == ScriptRuntime.ObjectClass) {
return coerceToNumber(Double.TYPE, value);
} else if ((type.isPrimitive() && type != Boolean.TYPE)
|| ScriptRuntime.NumberClass.isAssignableFrom(type)) {
return coerceToNumber(type, value);
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_STRING:
if (type == ScriptRuntime.StringClass || type.isInstance(value)) {
return value;
} else if (type == Character.TYPE || type == ScriptRuntime.CharacterClass) {
// Special case for converting a single char string to a
// character
// Placed here because it applies *only* to JS strings,
// not other JS objects converted to strings
if (((String) value).length() == 1) {
return new Character(((String) value).charAt(0));
} else {
return coerceToNumber(type, value);
}
} else if ((type.isPrimitive() && type != Boolean.TYPE)
|| ScriptRuntime.NumberClass.isAssignableFrom(type)) {
return coerceToNumber(type, value);
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_JAVA_CLASS:
if (value instanceof Wrapper) {
value = ((Wrapper) value).unwrap();
}
if (type == ScriptRuntime.ClassClass || type == ScriptRuntime.ObjectClass) {
return value;
} else if (type == ScriptRuntime.StringClass) {
return value.toString();
} else {
reportConversionError(value, type);
}
break;
case JSTYPE_JAVA_OBJECT:
case JSTYPE_JAVA_ARRAY:
if (value instanceof Wrapper) {
value = ((Wrapper) value).unwrap();
}
if (type.isPrimitive()) {
if (type == Boolean.TYPE) {
reportConversionError(value, type);
}
return coerceToNumber(type, value);
} else {
if (type == ScriptRuntime.StringClass) {
return value.toString();
} else {
if (type.isInstance(value)) {
return value;
} else {
reportConversionError(value, type);
}
}
}
break;
case JSTYPE_OBJECT:
if (type == ScriptRuntime.StringClass) {
return ScriptRuntime.toString(value);
} else if (type.isPrimitive()) {
if (type == Boolean.TYPE) {
reportConversionError(value, type);
}
return coerceToNumber(type, value);
} else if (type.isInstance(value)) {
return value;
} else if (type == ScriptRuntime.DateClass && value instanceof NativeDate) {
double time = ((NativeDate) value).getJSTimeValue();
// XXX: This will replace NaN by 0
return new Date((long) time);
} else if (type.isArray() && value instanceof NativeArray) {
// Make a new java array, and coerce the JS array components
// to the target (component) type.
NativeArray array = (NativeArray) value;
long length = array.getLength();
Class<?> arrayType = type.getComponentType();
Object Result = Array.newInstance(arrayType, (int) length);
for (int i = 0; i < length; ++i) {
try {
Array.set(Result, i, coerceType(arrayType, array.get(i, array)));
} catch (EvaluatorException ee) {
reportConversionError(value, type);
}
}
return Result;
} else if (value instanceof Wrapper) {
value = ((Wrapper) value).unwrap();
if (type.isInstance(value)) return value;
reportConversionError(value, type);
} else if (type.isInterface() && value instanceof Callable) {
// Try to use function as implementation of Java interface.
//
// XXX: Currently only instances of ScriptableObject are
// supported since the resulting interface proxies should
// be reused next time conversion is made and generic
// Callable has no storage for it. Weak references can
// address it but for now use this restriction.
if (value instanceof ScriptableObject) {
ScriptableObject so = (ScriptableObject) value;
Object key = Kit.makeHashKeyFromPair(COERCED_INTERFACE_KEY, type);
Object old = so.getAssociatedValue(key);
if (old != null) {
// Function was already wrapped
return old;
}
Context cx = Context.getContext();
Object glue = InterfaceAdapter.create(cx, type, (Callable) value);
// Store for later retrival
glue = so.associateValue(key, glue);
return glue;
}
reportConversionError(value, type);
} else {
reportConversionError(value, type);
}
break;
}
return value;
}
/**
* @deprecated Use {@link Context#getWrapFactory()} together with calling {@link
* WrapFactory#wrap(Context, Scriptable, Object, Class)}
*/
public static Object wrap(Scriptable scope, Object obj, Class<?> staticType) {
Context cx = Context.getContext();
return cx.getWrapFactory().wrap(cx, scope, obj, staticType);
}
