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package io;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;
import main.ResultListener;
import org.json.JSONException;
import org.json.JSONObject;
/**
* Read from standard input and inserts these tweets into the database.
*
* @author Maurice Laveaux
*/
public class InputReader {
/* The listener for standard input tweets. */
private final ResultListener m_listener;
/**
* @param listener The given listener for the input.
*/
public InputReader(final ResultListener listener) {
m_listener = listener;
}
/* Create a reader for the standard input, read each line and tweetReceived
* listener when a valid JSONObject is generated.
*/
public void startLoop() {
Scanner input = new Scanner(System.in);
while (input.hasNext()) {
try {
String line = input.nextLine();
if(line.equals("exit")) {
return;
}
JSONObject tweet = new JSONObject(line);
if (!tweet.has("user")) {
throw new JSONException("not a valid tweet JSON object");
}
m_listener.tweetReceived(tweet);
} catch (JSONException ex) {
getLogger().log(Level.INFO, null, ex);
}
}
}
private Logger getLogger() {
return Logger.getLogger(InputReader.class.getName());
}
}
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