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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.index.query;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.BooleanClause;
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.util.CollectionUtils;
import java.io.IOException;
import java.util.Locale;
public enum Operator implements Writeable {
OR,
AND;
public BooleanClause.Occur toBooleanClauseOccur() {
switch (this) {
case OR:
return BooleanClause.Occur.SHOULD;
case AND:
return BooleanClause.Occur.MUST;
default:
throw Operator.newOperatorException(this.toString());
}
}
public QueryParser.Operator toQueryParserOperator() {
switch (this) {
case OR:
return QueryParser.Operator.OR;
case AND:
return QueryParser.Operator.AND;
default:
throw Operator.newOperatorException(this.toString());
}
}
public static Operator readFromStream(StreamInput in) throws IOException {
return in.readEnum(Operator.class);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeEnum(this);
}
public static Operator fromString(String op) {
return valueOf(op.toUpperCase(Locale.ROOT));
}
private static IllegalArgumentException newOperatorException(String op) {
return new IllegalArgumentException(
"operator needs to be either " + CollectionUtils.arrayAsArrayList(values()) + ", but not [" + op + "]"
);
}
}