com.couchbase.client.java.query.dsl.path.HashJoinHintElement Maven / Gradle / Ivy

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The official Couchbase Java SDK

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/*
 * Copyright (c) 2018 Couchbase, Inc.
 *
 * Licensed 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 com.couchbase.client.java.query.dsl.path;

import java.util.Objects;

import com.couchbase.client.core.annotations.InterfaceAudience;
import com.couchbase.client.core.annotations.InterfaceStability;
import com.couchbase.client.java.query.dsl.element.Element;

/**
 * Hash Join hint for hash based join
 *
 * @author Subhashni Balakrishnan
 */
@InterfaceStability.Experimental
@InterfaceAudience.Private
public class HashJoinHintElement implements Element {

    private final HashSide side;

    public HashJoinHintElement(HashSide side) {
        Objects.requireNonNull(side);
        this.side = side;
    }

    @Override
    public String export() {
        return "USE HASH(" + this.side + ")";
    }
}