/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.common.lucene.search;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.BitsFilteredDocIdSet;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.Bits;
import org.elasticsearch.common.lucene.docset.AllDocIdSet;
import org.elasticsearch.common.lucene.docset.DocIdSets;
import org.elasticsearch.common.lucene.docset.NotDocIdSet;
import java.io.IOException;
/**
*
*/
public class NotFilter extends Filter {
private final Filter filter;
public NotFilter(Filter filter) {
this.filter = filter;
}
public Filter filter() {
return filter;
}
@Override
public DocIdSet getDocIdSet(LeafReaderContext context, Bits acceptDocs) throws IOException {
DocIdSet set = filter.getDocIdSet(context, null);
DocIdSet notSet;
if (DocIdSets.isEmpty(set)) {
notSet = new AllDocIdSet(context.reader().maxDoc());
} else {
notSet = new NotDocIdSet(set, context.reader().maxDoc());
}
return BitsFilteredDocIdSet.wrap(notSet, acceptDocs);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
NotFilter notFilter = (NotFilter) o;
return !(filter != null ? !filter.equals(notFilter.filter) : notFilter.filter != null);
}
@Override
public String toString() {
return "NotFilter(" + filter + ")";
}
@Override
public int hashCode() {
return filter != null ? filter.hashCode() : 0;
}
}