package org.apache.lucene.util.packed;
/*
* 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.
*/
import java.io.IOException;
import java.util.BitSet;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.util.BaseDocIdSetTestCase;
public class TestEliasFanoDocIdSet extends BaseDocIdSetTestCase<EliasFanoDocIdSet> {
@Override
public EliasFanoDocIdSet copyOf(final BitSet bs, final int numBits) throws IOException {
final EliasFanoDocIdSet set = new EliasFanoDocIdSet(bs.cardinality(), numBits - 1);
set.encodeFromDisi(new DocIdSetIterator() {
int doc = -1;
@Override
public int nextDoc() throws IOException {
doc = bs.nextSetBit(doc + 1);
if (doc == -1) {
doc = NO_MORE_DOCS;
}
assert doc < numBits;
return doc;
}
@Override
public int docID() {
return doc;
}
@Override
public long cost() {
return bs.cardinality();
}
@Override
public int advance(int target) throws IOException {
return slowAdvance(target);
}
});
return set;
}
}