it.espr.mvc.json.JsonFinder Maven / Gradle / Ivy
package it.espr.mvc.json;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class JsonFinder {
private static final Logger log = LoggerFactory.getLogger(JsonFinder.class);
private static final Map> jsonImpls = new LinkedHashMap<>();
{
jsonImpls.put("com.google.gson.Gson", GsonImpl.class);
jsonImpls.put("com.fasterxml.jackson.databind.ObjectMapper", JacksonImpl.class);
}
public Class find() {
for (Entry> jsonView : jsonImpls.entrySet()) {
try {
log.debug("Looking for json view {}", jsonView.getKey());
Class c = (Class) Class.forName(jsonView.getKey(), false, this.getClass().getClassLoader());
if (c != null) {
log.debug("Found json view {}", jsonView.getKey());
return jsonView.getValue();
}
} catch (Exception e) {
log.debug("Couldn't find a {} json impl on classpath", jsonView.getKey(), e);
}
}
log.info("Couldn't find any of {} json libraries on classpath.", jsonImpls.keySet());
return null;
}
}