/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.elasticsearch.search.facet.filter;
import org.apache.lucene.search.Filter;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.facet.Facet;
import org.elasticsearch.search.facet.FacetCollector;
import org.elasticsearch.search.facet.FacetProcessor;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.List;
/**
* @author kimchy (shay.banon)
*/
public class FilterFacetProcessor extends AbstractComponent implements FacetProcessor {
@Inject public FilterFacetProcessor(Settings settings) {
super(settings);
InternalFilterFacet.registerStreams();
}
@Override public String[] types() {
return new String[]{FilterFacet.TYPE};
}
@Override public FacetCollector parse(String facetName, XContentParser parser, SearchContext context) throws IOException {
Filter facetFilter = context.queryParserService().parseInnerFilter(parser);
return new FilterFacetCollector(facetName, facetFilter, context.filterCache());
}
@Override public Facet reduce(String name, List<Facet> facets) {
if (facets.size() == 1) {
return facets.get(0);
}
int count = 0;
for (Facet facet : facets) {
count += ((FilterFacet) facet).count();
}
return new InternalFilterFacet(name, count);
}
}