org.elasticsearch.index.query.ZeroTermsQueryOption Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* 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.index.query;
import org.apache.lucene.search.Query;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.lucene.search.Queries;
import java.io.IOException;
public enum ZeroTermsQueryOption implements Writeable {
NONE(0) {
public Query asQuery() {
return Queries.newMatchNoDocsQuery("Matching no documents because no terms present");
}
},
ALL(1) {
public Query asQuery() {
return Queries.newMatchAllQuery();
}
},
// this is used internally to make sure that query_string and simple_query_string
// ignores query part that removes all tokens.
NULL(2) {
public Query asQuery() {
return null;
}
};
private final int ordinal;
ZeroTermsQueryOption(int ordinal) {
this.ordinal = ordinal;
}
public abstract Query asQuery();
public static ZeroTermsQueryOption readFromStream(StreamInput in) throws IOException {
int ord = in.readVInt();
for (ZeroTermsQueryOption zeroTermsQuery : ZeroTermsQueryOption.values()) {
if (zeroTermsQuery.ordinal == ord) {
return zeroTermsQuery;
}
}
throw new ElasticsearchException("unknown serialized type [" + ord + "]");
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeVInt(this.ordinal);
}
}