/*
* Copyright (c) 2011 LinkedIn, Inc
*
* Licensed 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 com.flaptor.indextank.index.scorer;
import java.util.Collection;
import com.flaptor.indextank.index.DocId;
import com.flaptor.indextank.index.scorer.DynamicDataManager.DynamicData;
import com.flaptor.indextank.query.QueryVariables;
import com.flaptor.util.Pair;
import com.google.common.collect.Multimap;
public class VariablesRangeFilter implements MatchFilter {
private DynamicDataManager dynamicDataManager;
/**
* The ranges apply considering both ends as inclusive and using OR to
* join filters for the same variable and AND for different variables.
*/
private Multimap<Integer, Pair<Float, Float>> ranges;
public static MatchFilter NO_FILTER = new NoneMatchFilter();
public VariablesRangeFilter(DynamicDataManager dynamicDataManager, Multimap<Integer, Pair<Float, Float>> ranges) {
this.dynamicDataManager = dynamicDataManager;
this.ranges = ranges;
}
@Override
public boolean matches(DocId documentId, double textualScore, int now, QueryVariables queryVars) {
DynamicData dynamicData = dynamicDataManager.getDynamicData(documentId);
for (Integer variable : ranges.keySet()) {
if (!checkVariable(dynamicData.getBoost(variable), ranges.get(variable))) {
return false;
}
}
return true;
}
private boolean checkVariable(Float value, Collection<Pair<Float, Float>> ranges) {
for (Pair<Float, Float> range : ranges) {
if ((range.first() == null || value >= range.first()) && (range.last() == null || value <= range.last())) {
return true;
}
}
return false;
}
}