/**
* Copyright (c) 2010-2016 by the respective copyright holders.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.openhab.binding.weather.internal.parser;
import java.io.InputStream;
import org.openhab.binding.weather.internal.model.Weather;
import org.openhab.binding.weather.internal.utils.PropertyResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
/**
* Weather parser with JSON data in the InputStream.
*
* @author Gerhard Riegler
* @since 1.6.0
*/
public class JsonWeatherParser extends AbstractWeatherParser {
private static final Logger logger = LoggerFactory.getLogger(JsonWeatherParser.class);
/**
* {@inheritDoc}
*/
@Override
public void parseInto(InputStream is, Weather weather) throws Exception {
JsonFactory jsonFactory = new JsonFactory();
JsonParser jp = jsonFactory.createParser(is);
jp.nextValue();
handleToken(jp, null, weather);
jp.close();
super.parseInto(is, weather);
}
/**
* Iterates through the JSON structure and collects weather data.
*/
private void handleToken(JsonParser jp, String property, Weather weather) throws Exception {
JsonToken token = jp.getCurrentToken();
String prop = PropertyResolver.add(property, jp.getCurrentName());
if (token.isStructStart()) {
boolean isObject = token == JsonToken.START_OBJECT || token == JsonToken.END_OBJECT;
Weather forecast = !isObject ? weather : startIfForecast(weather, prop);
while (!jp.nextValue().isStructEnd()) {
handleToken(jp, prop, forecast);
}
if (isObject) {
endIfForecast(weather, forecast, prop);
}
} else if (token != null) {
try {
setValue(weather, prop, jp.getValueAsString());
} catch (Exception ex) {
logger.error("Error setting property '{}' with value '{}' ({})", prop, jp.getValueAsString(),
ex.getMessage());
}
}
}
}