/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.search.facet;
import java.io.IOException;
import org.apache.lucene.queries.function.ValueSource;
public class MinAgg extends SimpleAggValueSource {
public MinAgg(ValueSource vs) {
super("min", vs);
}
@Override
public SlotAcc createSlotAcc(FacetContext fcontext, int numDocs, int numSlots) throws IOException {
return new MinSlotAcc(getArg(), fcontext, numSlots);
}
@Override
public FacetMerger createFacetMerger(Object prototype) {
return new Merger();
}
private static class Merger extends FacetDoubleMerger {
double val = Double.NaN;
@Override
public void merge(Object facetResult, Context mcontext) {
double result = ((Number)facetResult).doubleValue();
if (result < val || Double.isNaN(val)) {
val = result;
}
}
@Override
protected double getDouble() {
return val;
}
}
}