/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF 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.apache.shardingsphere.infra.executor.sql.prepare.raw;
  
  import org.apache.shardingsphere.infra.annotation.HighFrequencyInvocation;
  import org.apache.shardingsphere.infra.executor.kernel.model.ExecutionGroup;
  import org.apache.shardingsphere.infra.executor.sql.context.ExecutionUnit;
  import org.apache.shardingsphere.infra.executor.sql.execute.engine.ConnectionMode;
  import org.apache.shardingsphere.infra.executor.sql.execute.engine.raw.RawSQLExecutionUnit;
  import org.apache.shardingsphere.infra.executor.sql.prepare.AbstractExecutionPrepareEngine;
  import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.stream.Collectors;
  
  /**
   * Raw execution prepare engine.
   */
  @HighFrequencyInvocation
  public final class RawExecutionPrepareEngine extends AbstractExecutionPrepareEngine<RawSQLExecutionUnit> {
      
      public RawExecutionPrepareEngine(final int maxConnectionsSizePerQuery, final Collection<ShardingSphereRule> rules) {
          super(maxConnectionsSizePerQuery, rules);
      }
      
      @Override
      protected List<ExecutionGroup<RawSQLExecutionUnit>> group(final String databaseName, final String dataSourceName, final int connectionOffset, final List<List<ExecutionUnit>> executionUnitGroups,
                                                                final ConnectionMode connectionMode) {
          return executionUnitGroups.stream().map(each -> createExecutionGroup(each, connectionMode)).collect(Collectors.toList());
      }
      
      private ExecutionGroup<RawSQLExecutionUnit> createExecutionGroup(final List<ExecutionUnit> executionUnitGroup, final ConnectionMode connectionMode) {
          return new ExecutionGroup<>(executionUnitGroup.stream().map(each -> new RawSQLExecutionUnit(each, connectionMode)).collect(Collectors.toList()));
      }
  }