org.graylog2.streams.matchers.FieldPresenceMatcher Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.streams.matchers;
import org.graylog2.plugin.Message;
import org.graylog2.plugin.streams.StreamRule;
/**
* @author Dennis Oelkers
*/
public class FieldPresenceMatcher implements StreamRuleMatcher {
@Override
public boolean match(Message msg, StreamRule rule) {
Object rawField = msg.getField(rule.getField());
if (rawField == null) {
return rule.getInverted();
}
if (rawField instanceof String) {
String field = (String) rawField;
Boolean result = rule.getInverted() ^ !(field.trim().isEmpty());
return result;
}
return !rule.getInverted();
}
}