/*
* Copyright (C) 2003-2011 eXo Platform SAS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.exoplatform.social.client.api.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;
import org.exoplatform.social.client.api.model.Model;
import org.exoplatform.social.client.api.net.SocialHttpClientException;
import org.json.simple.JSONArray;
import org.json.simple.JSONValue;
import org.json.simple.parser.ContainerFactory;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
/**
* Created by The eXo Platform SAS
* Author : eXoPlatform
* exo@exoplatform.com
* Jun 30, 2011
*/
public class SocialJSONDecodingSupport {
/**
* Parse JSON text into java Model object from the input source.
* and then it's base on the class type.
*
* @param <T> Generic type must extend from Model.
* @param clazz Class type.
* @param jsonContent Json content which you need to create the Model
* @throws ParseException Throw this exception if any
*
*/
public static <T extends Model> T parser(final Class<T> clazz, String jsonContent) throws ParseException {
JSONParser parser = new JSONParser();
ContainerFactory containerFactory = new ContainerFactory() {
public List<T> creatArrayContainer() {
return new LinkedList<T>();
}
public T createObjectContainer() {
try {
return clazz.newInstance();
} catch (InstantiationException e) {
return null;
} catch (IllegalAccessException e) {
return null;
}
}
};
return (T) parser.parse(jsonContent, containerFactory);
}
/**
* Parse JSON text into java Model object from the input source.
* and then it's base on the class type.
*
* @param <T> Generic type must extend from Model.
* @param clazz Class type.
* @param response HttpResponse which getting the JSONContent.
* @throws ParseException Throw this exception if any
* @throws IOException Throw this exception if any
*/
public static <T extends Model> T parser(final Class<T> clazz, HttpResponse response) throws IOException, ParseException {
//Read InputStream from HttpResponse to Buffered
HttpEntity entity = SocialHttpClientSupport.processContent(response);
//Check the content length
if (entity.getContentLength() != -1) {
//getting the HttpResponse content
String jsonContent = EntityUtils.toString(entity);
//close stream
SocialHttpClientSupport.consume(entity);
return parser(clazz, jsonContent);
} else {
return null;
}
}
/**
* Parse JSON text into java Map object from the input source.
*
* @param jsonContent Json content which you need to create the Model
* @throws ParseException Throw this exception if any
*/
public static Map parser(String jsonContent) throws ParseException {
JSONParser parser = new JSONParser();
ContainerFactory containerFactory = new ContainerFactory() {
public List creatArrayContainer() {
return new LinkedList();
}
public Map createObjectContainer() {
return new LinkedHashMap();
}
};
return (Map) parser.parse(jsonContent, containerFactory);
}
/**
* HttpResponse text into java Map object from the input source.
*
* @param response HttpResponse to get the content.
* @throws ParseException Throw this exception if any
*/
public static Map parser(HttpResponse response) throws ParseException {
String jsonContent = null;
try {
jsonContent = SocialHttpClientSupport.getContent(response);
} catch (SocialHttpClientException e) {
throw new ParseException(0);
}
return parser(jsonContent);
}
/**
*
* @author Ly Minh Phuong - http://phuonglm.net
* @param <T>
* @param clazz
* @param response
* @return
* @throws IOException
* @throws ParseException
*/
public static <T extends Model > List<T> JSONArrayObjectParser(final Class<T> clazz, HttpResponse response) throws IOException, ParseException{
//Read InputStream from HttpResponse to Buffered
HttpEntity entity = SocialHttpClientSupport.processContent(response);
//Check the content length
if (entity.getContentLength() != -1) {
//getting the HttpResponse content
String jsonContent = EntityUtils.toString(entity);
//close stream
SocialHttpClientSupport.consume(entity);
return JSONArrayObjectParser(clazz, jsonContent);
} else {
return null;
}
}
/**
*
* @author Ly Minh Phuong - http://phuonglm.net
* @param <T>
* @param clazz
* @param jsonArrayContent
* @return
* @throws IOException
* @throws ParseException
*/
public static <T extends Model > List<T> JSONArrayObjectParser(final Class<T> clazz, String jsonArrayContent) throws IOException, ParseException{
JSONArray jsonResultArray = (JSONArray)JSONValue.parse(jsonArrayContent);
List<T> result = new ArrayList<T>();
for (Object jsonObject : jsonResultArray) {
String jsonString = jsonObject.toString();
result.add(parser(clazz,jsonString));
}
return result;
}
}