/**
* Helios, OpenSource Monitoring
* Brought to you by the Helios Development Group
*
* Copyright 2007, Helios Development Group and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
*/
package org.helios.apmrouter.dataservice.json;
import java.util.LinkedHashMap;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
/**
* <p>Title: DataServiceUtils</p>
* <p>Description: Static helper classes for JSON data services.</p>
* <p>Company: Helios Development Group LLC</p>
* @author Whitehead (nwhitehead AT heliosdev DOT org)
* <p><code>org.helios.apmrouter.dataservice.json.DataServiceUtils</code></p>
*/
public class DataServiceUtils {
/**
* Extracts a map from a json request
* @param json The json request to extract the map from
* @param keys The keys to navigate the hirerarchy of the json object
* @return A map of values
* @throws JSONException thrown on any JSON unmarshalling error
*/
public static Map<String, Object> getMap(JSONObject json, String...keys) throws JSONException {
if(json==null) throw new IllegalArgumentException("The passed JSON object was null", new Throwable());
JSONObject target = json;
Map<String, Object> results = new LinkedHashMap<String, Object>();
for(String key: keys) {
target = target.getJSONObject(key);
}
for(String key: JSONObject.getNames(target)) {
results.put(key, target.get(key));
}
return results;
}
}