/**
* 对Scriptable对象转换成相应的Java对象
*
* <p>如果对象类型是数组，按下标数组和关联数组两种情况分别转换为Array和Map； 否则转换为对应的Java对象，或者是一个包含此对象所有属性的Map
*
* @param scriptObj 需要转换的Scriptable对象
* @param context 上下文
* @return return 转换后的Java对象
*/
@SuppressWarnings({"rawtypes", "unchecked"})
private static Object scriptableToJava(ScriptableObject scriptObj, Context context)
throws IllegalAccessException, NoSuchFieldException {
// Array & Arguments
if (ScriptRuntime.isArrayObject(scriptObj)) {
final Object[] arrayElements = (Object[]) context.getElements(scriptObj);
// If scriptObj is a associative arry, arrayElements.length will
// always 0
// So if scriptObj is empty or index array, return true, else return
// false
if (scriptObj.getIds().length == 0 || arrayElements.length == scriptObj.getIds().length) {
for (int i = 0; i < arrayElements.length; i++) {
arrayElements[i] = jsToJava(arrayElements[i], context);
}
return arrayElements;
} else {
final Object[] ids = scriptObj.getIds();
final HashMap map = new HashMap();
for (int i = 0; i < ids.length; i++) {
final String key = ids[i].toString();
Object value = scriptObj.get(key, scriptObj);
// if value is UniqueTag, means index is numeric,
// should get its value by index
if (value.getClass().equals(UniqueTag.class)) {
value = scriptObj.get(Integer.parseInt(key), scriptObj);
}
map.put(ids[i], jsToJava(value, context));
}
return map;
}
} else {
final String jsClassName = scriptObj.getClassName();
// If jsClassName is 'Object', means scriptObj could't directly
// convert to a normal java object, in this case we
// return a map contains all properties in this scriptable object.
if ("Object".equals(jsClassName)) {
final Object[] ids = scriptObj.getIds();
final HashMap map = new HashMap();
for (int i = 0; i < ids.length; i++) {
final String key = ids[i].toString();
final Object value = scriptObj.get(key, scriptObj);
map.put(key, jsToJava(value, context));
}
return map;
}
// If jsClassName is 'Funtion' & instanceof NativeFunction,
// means scriptObj is a function defined in script,
// in this case we return a String present source of this function
else if ("Function".equals(jsClassName) && scriptObj instanceof NativeFunction) {
final NativeFunction func = (NativeFunction) scriptObj;
return Decompiler.decompile(
func.getEncodedSource(), Decompiler.TO_SOURCE_FLAG, new UintMap());
}
// Else, we can covert it to a desired java object by
// Context.jsToJava()
else {
final Class clazz =
(Class) ScriptRuntime.class.getDeclaredField(jsClassName + "Class").get(scriptObj);
return Context.jsToJava(scriptObj, clazz);
}
}
}
