package com.tethik.json;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
public abstract class JSONMappedObject {
private static boolean debug = false;
protected Object getValue(Class type, Object obj) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException, JSONException
{
Object value;
if(JSONMappedObject.class.isAssignableFrom(type)) {
// Recursion
if(debug) System.out.println("Object found");
Constructor constructor = type.getConstructor(JSONObject.class);
if(debug) System.out.println("Constructor created");
value = constructor.newInstance((JSONObject) obj);
} else if(type.isEnum()) {
// Enums
if(debug) System.out.println("Enum found");
value = Enum.valueOf((Class) type, (String) obj);
} else if(type.isArray()) {
JSONArray array = (JSONArray) obj;
Object[] objects = new Object[array.length()];
for(int i = 0; i < array.length(); i++)
objects[i] = getValue(type.getComponentType(), array.get(i));
value = objects;
} else {
// Basic type. Or error :(
if(debug) System.out.println("Basic found");
value = obj;
}
return value;
}
protected Object getValue(Class type, String key, JSONObject obj) throws NoSuchMethodException, SecurityException, JSONException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException
{
Object value;
if(JSONMappedObject.class.isAssignableFrom(type)) {
// Recursion
if(debug) System.out.println("Object found");
Constructor constructor = type.getConstructor(JSONObject.class);
if(debug) System.out.println("Constructor created");
value = constructor.newInstance(obj.getJSONObject(key));
} else if(type.isEnum()) {
// Enums
if(debug) System.out.println("Enum found");
value = Enum.valueOf((Class) type, obj.getString(key));
} else if(type.isArray()) {
JSONArray array = obj.getJSONArray(key);
Object objects = type.cast(Array.newInstance(type.getComponentType(), array.length()));
for(int i = 0; i < array.length(); i++)
Array.set(objects, i, type.getComponentType().cast(getValue(type.getComponentType(), array.get(i))));
value = objects;
} else {
// Basic type. Or error :(
if(debug) System.out.println("Basic found");
value = obj.get(key);
}
return value;
}
protected void parseJson(JSONObject obj) throws JSONException, IllegalArgumentException, IllegalAccessException, InstantiationException, NoSuchMethodException, SecurityException, InvocationTargetException {
if(debug) System.out.println("parseJson called on " + this.getClass().getName());
Field[] fields = this.getClass().getDeclaredFields();
for(Field field : fields) {
field.setAccessible(true);
if(debug) System.out.println("Checking " + field.getName());
if(!field.isAnnotationPresent(JSONObj.class))
continue;
String key = field.getName();
Class type = field.getType();
if(debug) System.out.println("Annotation found on " + key + " type: " + type.getName());
Object value = getValue(type, key, obj);
field.set(this, value);
if(debug) System.out.println("Field set to " + value);
}
}
public JSONMappedObject(JSONObject obj) throws JSONException
{
try {
parseJson(obj);
} catch (IllegalArgumentException | IllegalAccessException | InstantiationException | NoSuchMethodException | SecurityException | InvocationTargetException e) {
throw new JSONException(e);
}
}
}