org.elasticsearch.index.fielddata.ordinals.DocIdOrdinals Maven / Gradle / Ivy
/*
* Licensed to ElasticSearch and Shay Banon 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.index.fielddata.ordinals;
import org.apache.lucene.util.IntsRef;
import org.elasticsearch.common.RamUsage;
/**
* Ordinals that effectively are single valued and map "one to one" to the
* doc ids. Note, the docId is incremented by 1 to get the ordinal, since 0
* denotes an empty value.
*/
public class DocIdOrdinals implements Ordinals {
private final int numDocs;
/**
* Constructs a new doc id ordinals.
*/
public DocIdOrdinals(int numDocs) {
this.numDocs = numDocs;
}
@Override
public boolean hasSingleArrayBackingStorage() {
return false;
}
@Override
public Object getBackingStorage() {
return null;
}
@Override
public long getMemorySizeInBytes() {
return RamUsage.NUM_BYTES_OBJECT_REF;
}
@Override
public boolean isMultiValued() {
return false;
}
@Override
public int getNumDocs() {
return numDocs;
}
@Override
public int getNumOrds() {
return numDocs;
}
@Override
public int getMaxOrd() {
return numDocs + 1;
}
@Override
public Ordinals.Docs ordinals() {
return new Docs(this);
}
public static class Docs implements Ordinals.Docs {
private final DocIdOrdinals parent;
private final IntsRef intsScratch = new IntsRef(new int[1], 0, 1);
private final SingleValueIter iter = new SingleValueIter();
public Docs(DocIdOrdinals parent) {
this.parent = parent;
}
@Override
public Ordinals ordinals() {
return parent;
}
@Override
public int getNumDocs() {
return parent.getNumDocs();
}
@Override
public int getNumOrds() {
return parent.getNumOrds();
}
@Override
public int getMaxOrd() {
return parent.getMaxOrd();
}
@Override
public boolean isMultiValued() {
return false;
}
@Override
public int getOrd(int docId) {
return docId + 1;
}
@Override
public IntsRef getOrds(int docId) {
intsScratch.ints[0] = docId + 1;
return intsScratch;
}
@Override
public Iter getIter(int docId) {
return iter.reset(docId + 1);
}
}
}