/**
* This file is part of Graylog2.
*
* Graylog2 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.
*
* Graylog2 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 Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.inputs.converters;
import org.graylog2.ConfigurationException;
import org.graylog2.plugin.inputs.Converter;
import java.util.Map;
import java.util.regex.Pattern;
/**
* @author Lennart Koopmann <lennart@torch.sh>
*/
public class SplitAndCountConverter extends Converter {
private final String splitBy;
private final String splitByEscaped;
public SplitAndCountConverter(Map<String, Object> config) throws ConfigurationException {
super(Type.SPLIT_AND_COUNT, config);
if (config.get("split_by") == null || ((String) config.get("split_by")).isEmpty()) {
throw new ConfigurationException("Missing config [split_by].");
}
splitBy = (String) config.get("split_by");
splitByEscaped = Pattern.quote((String) config.get("split_by"));
}
@Override
public Object convert(String value) {
if (value == null || value.isEmpty()) {
return 0;
}
if (!value.contains(splitBy)) {
// split().length would be 1, but we want 0.
return 0;
}
return value.split(splitByEscaped).length;
}
@Override
public boolean buildsMultipleFields() {
return false;
}
}