private static ObjToIntMap getObjectFunctionNames(Scriptable obj) {
Object[] ids = ScriptableObject.getPropertyIds(obj);
ObjToIntMap map = new ObjToIntMap(ids.length);
for (int i = 0; i != ids.length; ++i) {
if (!(ids[i] instanceof String)) continue;
String id = (String) ids[i];
Object value = ScriptableObject.getProperty(obj, id);
if (value instanceof Function) {
Function f = (Function) value;
int length = ScriptRuntime.toInt32(ScriptableObject.getProperty(f, "length"));
if (length < 0) {
length = 0;
}
map.put(id, length);
}
}
return map;
}
public static Function getFunction(Scriptable obj, String functionName) {
Object x = ScriptableObject.getProperty(obj, functionName);
if (x == Scriptable.NOT_FOUND) {
// This method used to swallow the exception from calling
// an undefined method. People have come to depend on this
// somewhat dubious behavior. It allows people to avoid
// implementing listener methods that they don't care about,
// for instance.
return null;
}
if (!(x instanceof Function)) throw ScriptRuntime.notFunctionError(x, functionName);
return (Function) x;
}