@SuppressWarnings("unchecked")
public void addDefaultValue(String className, JSONObject oper) throws Exception {
ObjectMapper defaultValueMapper = ObjectMapperFactory.getOperatorValueSerializer();
Class<? extends Operator> clazz = (Class<? extends Operator>) classLoader.loadClass(className);
if (clazz != null) {
Operator operIns = clazz.newInstance();
String s = defaultValueMapper.writeValueAsString(operIns);
oper.put("defaultValue", new JSONObject(s).get(className));
}
}
public JSONObject describeClass(Class<?> clazz) throws Exception {
JSONObject desc = new JSONObject();
desc.put("name", clazz.getName());
if (clazz.isEnum()) {
@SuppressWarnings("unchecked")
Class<Enum<?>> enumClass = (Class<Enum<?>>) clazz;
ArrayList<String> enumNames = Lists.newArrayList();
for (Enum<?> e : enumClass.getEnumConstants()) {
enumNames.add(e.name());
}
desc.put("enum", enumNames);
}
UI_TYPE ui_type = UI_TYPE.getEnumFor(clazz);
if (ui_type != null) {
desc.put("uiType", ui_type.getName());
}
desc.put("properties", getClassProperties(clazz, 0));
return desc;
}
private JSONArray getClassProperties(Class<?> clazz, int level) throws IntrospectionException {
JSONArray arr = new JSONArray();
TypeDiscoverer td = new TypeDiscoverer();
try {
for (PropertyDescriptor pd : Introspector.getBeanInfo(clazz).getPropertyDescriptors()) {
Method readMethod = pd.getReadMethod();
if (readMethod != null) {
if (readMethod.getDeclaringClass() == java.lang.Enum.class) {
// skip getDeclaringClass
continue;
} else if ("class".equals(pd.getName())) {
// skip getClass
continue;
}
} else {
// yields com.datatorrent.api.Context on JDK6 and
// com.datatorrent.api.Context.OperatorContext with JDK7
if ("up".equals(pd.getName())
&& com.datatorrent.api.Context.class.isAssignableFrom(pd.getPropertyType())) {
continue;
}
}
// LOG.info("name: " + pd.getName() + " type: " + pd.getPropertyType());
Class<?> propertyType = pd.getPropertyType();
if (propertyType != null) {
JSONObject propertyObj = new JSONObject();
propertyObj.put("name", pd.getName());
propertyObj.put("canGet", readMethod != null);
propertyObj.put("canSet", pd.getWriteMethod() != null);
if (readMethod != null) {
for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
OperatorClassInfo oci = classInfo.get(c.getName());
if (oci != null) {
MethodInfo getMethodInfo = oci.getMethods.get(readMethod.getName());
if (getMethodInfo != null) {
addTagsToProperties(getMethodInfo, propertyObj);
break;
}
}
}
// type can be a type symbol or parameterized type
td.setTypeArguments(clazz, readMethod.getGenericReturnType(), propertyObj);
} else {
if (pd.getWriteMethod() != null) {
td.setTypeArguments(
clazz, pd.getWriteMethod().getGenericParameterTypes()[0], propertyObj);
}
}
// if (!propertyType.isPrimitive() && !propertyType.isEnum() && !propertyType.isArray() &&
// !propertyType.getName().startsWith("java.lang") && level < MAX_PROPERTY_LEVELS) {
// propertyObj.put("properties", getClassProperties(propertyType, level + 1));
// }
arr.put(propertyObj);
}
}
} catch (JSONException ex) {
throw new RuntimeException(ex);
}
return arr;
}