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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.predicate.index;
import com.yahoo.search.predicate.SubqueryBitmap;
/**
* Wraps an int stream of document ids into a PostingList.
* All documents in the stream are considered matches.
*
* @author Magnar Nedland
* @author bjorncs
*/
public class ZeroConstraintPostingList implements PostingList {
private final int[] docIds;
private final int length;
private int currentIndex;
private int currentDocId;
public ZeroConstraintPostingList(int[] docIds) {
this.docIds = docIds;
this.currentIndex = 0;
this.currentDocId = -1;
this.length = docIds.length;
}
@Override
public boolean nextDocument(int docId) {
int currentDocId = this.currentDocId;
while (currentIndex < length && currentDocId <= docId) {
currentDocId = docIds[currentIndex++];
}
if (currentDocId <= docId) {
return false;
}
this.currentDocId = currentDocId;
return true;
}
@Override
public boolean prepareIntervals() {
return true;
}
@Override
public boolean nextInterval() {
return false;
}
@Override
public int size() {
return length;
}
@Override
public int getInterval() {
return Interval.fromBoundaries(1, Interval.ZERO_CONSTRAINT_RANGE);
}
@Override
public int getDocId() {
return currentDocId;
}
@Override
public long getSubquery() {
return SubqueryBitmap.ALL_SUBQUERIES;
}
@Override
public int[] getDocIds() {
return docIds;
}
}
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