/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013 Metamarkets Group Inc.
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package io.druid.query.topn;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.metamx.common.IAE;
import java.util.Map;
/**
*/
public class LegacyTopNMetricSpec extends NumericTopNMetricSpec
{
private static final String convertValue(Object metric)
{
final String retVal;
if (metric instanceof String) {
retVal = (String) metric;
} else if (metric instanceof Map) {
retVal = (String) ((Map) metric).get("metric");
} else {
throw new IAE("Unknown type[%s] for metric[%s]", metric.getClass(), metric);
}
return retVal;
}
@JsonCreator
public LegacyTopNMetricSpec(Object metric)
{
super(convertValue(metric));
}
}