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/*
 * Copyright 2016-2018 shardingsphere.io.
 * 
 * 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 io.shardingsphere.core.routing;

import io.shardingsphere.core.constant.SQLType;
import io.shardingsphere.core.parsing.parser.sql.SQLStatement;
import io.shardingsphere.core.routing.router.sharding.GeneratedKey;
import lombok.Getter;
import lombok.RequiredArgsConstructor;

import java.util.LinkedHashSet;
import java.util.Set;

/**
 * SQL route result.
 * 
 * @author gaohongtao
 * @author zhangliang
 * @author zhaojun
 */
@RequiredArgsConstructor
@Getter
public final class SQLRouteResult {
    
    private final SQLStatement sqlStatement;
    
    private final GeneratedKey generatedKey;
    
    private final Set executionUnits = new LinkedHashSet<>();

    /**
     * whether SQLRouteResult can refresh table metadata.
     *
     * @return boolean
     */
    public boolean canRefreshMetaData() {
        return SQLType.DDL.equals(sqlStatement.getType()) && !sqlStatement.getTables().isEmpty();
    }
}