org.elasticsearch.lucene.queries.SpanMatchNoDocsQuery Maven / Gradle / Ivy
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.lucene.queries;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.TermStates;
import org.apache.lucene.queries.spans.SpanQuery;
import org.apache.lucene.queries.spans.SpanWeight;
import org.apache.lucene.queries.spans.Spans;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.QueryVisitor;
import org.apache.lucene.search.ScoreMode;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
/**
* A {@link SpanQuery} that matches no documents.
*/
public class SpanMatchNoDocsQuery extends SpanQuery {
private final String field;
private final String reason;
public SpanMatchNoDocsQuery(String field, String reason) {
this.field = field;
this.reason = reason;
}
@Override
public String getField() {
return field;
}
@Override
public String toString(String field) {
return "SpanMatchNoDocsQuery(\"" + reason + "\")";
}
@Override
public boolean equals(Object o) {
return sameClassAs(o);
}
@Override
public int hashCode() {
return classHash();
}
@Override
public void visit(QueryVisitor visitor) {
visitor.visitLeaf(this);
}
@Override
public SpanWeight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException {
return new SpanWeight(this, searcher, Collections.emptyMap(), boost) {
@Override
public void extractTermStates(Map contexts) {}
@Override
public Spans getSpans(LeafReaderContext ctx, Postings requiredPostings) {
return null;
}
@Override
public boolean isCacheable(LeafReaderContext ctx) {
return true;
}
};
}
}