/**
* 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.indexer.results;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.unit.TimeValue;
import org.graylog2.indexer.searches.Searches;
import org.graylog2.indexer.searches.timeranges.AbsoluteRange;
import org.graylog2.plugin.Tools;
import java.util.Map;
/**
* @author Lennart Koopmann <lennart@torch.sh>
*/
public abstract class HistogramResult extends IndexQueryResult {
private AbsoluteRange boundaries;
public HistogramResult(String originalQuery, BytesReference builtQuery, TimeValue took) {
super(originalQuery, builtQuery, took);
}
public abstract Searches.DateHistogramInterval getInterval();
public abstract Map getResults();
/*
* Extract from and to fields from the built query to determine
* histogram boundaries.
*/
public AbsoluteRange getHistogramBoundaries() {
if (boundaries == null) {
try {
ObjectMapper mapper = new ObjectMapper();
JsonParser jp = mapper.getFactory().createParser(getBuiltQuery());
JsonNode rootNode = mapper.readTree(jp);
JsonNode timestampNode = rootNode.findValue("range").findValue("timestamp");
String from = Tools.elasticSearchTimeFormatToISO8601(timestampNode.findValue("from").asText());
String to = Tools.elasticSearchTimeFormatToISO8601(timestampNode.findValue("to").asText());
boundaries = new AbsoluteRange(from, to);
} catch (Exception ignored) {}
}
return boundaries;
}
}