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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch 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.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 {
int ordinal = in.readVInt();
if (ordinal < 0 || ordinal >= values().length) {
throw new IOException("Unknown Operator ordinal [" + ordinal + "]");
}
return values()[ordinal];
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeVInt(this.ordinal());
}
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 + "]");
}
}