ErrorUpdate.java

/*******************************************************************************
 * Copyright 2012 University of Southern California
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * 	http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This code was developed by the Information Integration Group as part 
 * of the Karma project at the Information Sciences Institute of the 
 * University of Southern California.  For more information, publications, 
 * and related projects, please see: http://www.isi.edu/integration
 ******************************************************************************/
package edu.isi.karma.controller.update;

import java.io.PrintWriter;

import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import edu.isi.karma.view.VWorkspace;

public class ErrorUpdate extends AbstractUpdate {

	String errorMessage;

	private enum JsonKeys {
		Error
	}
	
	private enum JsonValues {
		KarmaError
	}
	
	private static Logger logger = LoggerFactory.getLogger(ErrorUpdate.class);
	
	public ErrorUpdate(String errorMessage) {
		super();
		this.errorMessage = errorMessage;
	}

	@Override
	public void generateJson(String prefix, PrintWriter pw,
			VWorkspace vWorkspace) {
		JSONObject obj = new JSONObject();
		try {
			obj.put(GenericJsonKeys.updateType.name(), JsonValues.KarmaError.name());
			obj.put(JsonKeys.Error.name(), errorMessage);
			pw.println(obj.toString());
		} catch (JSONException e) {
			logger.error("Error generating JSON for ErrorUpdate", e);
		}
	}

}