org.elasticsearch.common.lucene.docset.NotDocSet Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* 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.common.lucene.docset;
import java.io.IOException;
/**
* @author kimchy (shay.banon)
*/
public class NotDocSet extends GetDocSet {
private final DocSet set;
public NotDocSet(DocSet set, int max) {
super(max);
this.set = set;
}
@Override public boolean isCacheable() {
// not cacheable, the reason is that by default, when constructing the filter, it is not cacheable,
// so if someone wants it to be cacheable, we might as well construct a cached version of the result
return false;
// return set.isCacheable();
}
@Override public boolean get(int doc) throws IOException {
return !set.get(doc);
}
// This seems like overhead compared to testing with get and iterating over docs
// @Override public DocIdSetIterator iterator() throws IOException {
// return new NotDocIdSetIterator();
// }
//
// class NotDocIdSetIterator extends DocIdSetIterator {
// int lastReturn = -1;
// private DocIdSetIterator it1 = null;
// private int innerDocid = -1;
//
// NotDocIdSetIterator() throws IOException {
// initialize();
// }
//
// private void initialize() throws IOException {
// it1 = set.iterator();
//
// if ((innerDocid = it1.nextDoc()) == DocIdSetIterator.NO_MORE_DOCS) it1 = null;
// }
//
// @Override
// public int docID() {
// return lastReturn;
// }
//
// @Override
// public int nextDoc() throws IOException {
// return advance(0);
// }
//
// @Override
// public int advance(int target) throws IOException {
//
// if (lastReturn == DocIdSetIterator.NO_MORE_DOCS) {
// return DocIdSetIterator.NO_MORE_DOCS;
// }
//
// if (target <= lastReturn) target = lastReturn + 1;
//
// if (it1 != null && innerDocid < target) {
// if ((innerDocid = it1.advance(target)) == DocIdSetIterator.NO_MORE_DOCS) {
// it1 = null;
// }
// }
//
// while (it1 != null && innerDocid == target) {
// target++;
// if (target >= max) {
// return (lastReturn = DocIdSetIterator.NO_MORE_DOCS);
// }
// if ((innerDocid = it1.advance(target)) == DocIdSetIterator.NO_MORE_DOCS) {
// it1 = null;
// }
// }
//
// // ADDED THIS, bug in code
// if (target >= max) {
// return (lastReturn = DocIdSetIterator.NO_MORE_DOCS);
// }
//
// return (lastReturn = target);
// }
// }
}