Created
October 15, 2012 15:53
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Jsonator
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package com.mysite.model.entities; | |
import java.io.Serializable; | |
import java.lang.reflect.Field; | |
import java.util.ArrayList; | |
import java.util.Arrays; | |
import java.util.List; | |
import org.json.simple.JSONArray; | |
import org.json.simple.JSONObject; | |
/** | |
* | |
* @author Cecil.Meeks | |
*/ | |
public abstract class Jsonator<T> implements Serializable { | |
private Class<T> entityClass; | |
private JSONObject json; | |
private JSONArray jsonArray; | |
public Jsonator(Class<T> entityClass) { | |
this.entityClass = entityClass; | |
this.json = new JSONObject(); | |
this.jsonArray = new JSONArray(); | |
} | |
public void convert(List<T> paObjectList) throws IllegalArgumentException, IllegalAccessException { | |
convert(paObjectList, null); | |
} | |
public void convert(List<T> paObjectList, String[] paExcludedColumns) throws IllegalArgumentException, IllegalAccessException { | |
try { | |
int count = paObjectList.size(); | |
// convert the String array to an ArrayList. Makes it easier to find keys | |
List<String> excludedList = new ArrayList<String>(); | |
if (paExcludedColumns != null) { | |
excludedList.addAll(Arrays.asList(paExcludedColumns)); | |
} | |
for (Object obj : paObjectList) { | |
Class<?> kls = obj.getClass(); | |
JSONObject objJson = new JSONObject(); | |
Field[] fields = kls.getDeclaredFields(); | |
for (Field field : fields) { | |
if (excludedList.size() > 0) { | |
if (!excludedList.contains(field.getName())) { | |
field.setAccessible(true); | |
objJson.put(field.getName(), field.get(obj)); | |
} | |
} else { | |
field.setAccessible(true); | |
objJson.put(field.getName(), field.get(obj)); | |
} | |
} | |
jsonArray.add(objJson); | |
} | |
json.put("count", count); | |
json.put("message", "Successfully found " + count + " records."); | |
json.put("results", jsonArray); | |
json.put("success", true); | |
} | |
catch (IllegalArgumentException ex) { | |
appendError("There was a problem. Please contact support.", "IllegalArgumentException"); | |
} | |
catch (IllegalAccessException ex) { | |
appendError("There was a problem. Please contact support.", "IllegalAccessException"); | |
} | |
catch (SecurityException ex) { | |
appendError("There was a problem. Please contact support.", "SecurityException"); | |
} | |
catch (Exception ex) { | |
appendError("There was a problem. Please contact support.", "Exception"); | |
} | |
} | |
public String results() { | |
return json.toJSONString(); | |
} | |
private void appendError(String paMessage, String paException) { | |
if (!json.containsKey("success")) { | |
json.put("success", false); | |
} | |
if (!json.containsKey("message")) { | |
json.put("message", paMessage); | |
} | |
if (!json.containsKey("exception")) { | |
json.put("exception", paException); | |
} | |
if (!json.containsKey("results")) { | |
json.put("results", new JSONArray()); | |
} | |
} | |
} |
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