content: /**
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * <p>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
   *
   * <p>http://www.apache.org/licenses/LICENSE-2.0
   *
   * <p>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.alibaba.graphscope.groot.schema.ddl;
  
  import com.alibaba.graphscope.groot.common.exception.UnsupportedOperationException;
  import com.alibaba.graphscope.groot.common.schema.wrapper.GraphDef;
  import com.alibaba.graphscope.groot.operation.Operation;
  import com.alibaba.graphscope.groot.operation.OperationType;
  import com.alibaba.graphscope.groot.schema.request.DdlRequestBatch;
  import com.alibaba.graphscope.groot.schema.request.DdlRequestBlob;
  import com.google.protobuf.ByteString;
  import com.google.protobuf.InvalidProtocolBufferException;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  public class DdlExecutors {
  
      private Map<OperationType, AbstractDdlExecutor> ddlExecutors;
  
      public DdlExecutors() {
          this.ddlExecutors = new HashMap<>();
          ddlExecutors.put(OperationType.CREATE_VERTEX_TYPE, new CreateVertexTypeExecutor());
          ddlExecutors.put(
                  OperationType.ADD_VERTEX_TYPE_PROPERTIES, new AddVertexTypePropertiesExecutor());
          ddlExecutors.put(OperationType.CREATE_EDGE_TYPE, new CreateEdgeTypeExecutor());
          ddlExecutors.put(
                  OperationType.ADD_EDGE_TYPE_PROPERTIES, new AddEdgeTypePropertiesExecutor());
          ddlExecutors.put(OperationType.DROP_VERTEX_TYPE, new DropVertexTypeExecutor());
          ddlExecutors.put(OperationType.DROP_EDGE_TYPE, new DropEdgeTypeExecutor());
          ddlExecutors.put(OperationType.ADD_EDGE_KIND, new AddEdgeKindExecutor());
          ddlExecutors.put(OperationType.REMOVE_EDGE_KIND, new RemoveEdgeKindExecutor());
          ddlExecutors.put(OperationType.PREPARE_DATA_LOAD, new PrepareDataLoadExecutor());
          ddlExecutors.put(OperationType.COMMIT_DATA_LOAD, new CommitDataLoadExecutor());
      }
  
      public AbstractDdlExecutor getExecutor(OperationType operationType) {
          AbstractDdlExecutor ddlExecutor = this.ddlExecutors.get(operationType);
          if (ddlExecutor != null) {
              return ddlExecutor;
          }
          throw new UnsupportedOperationException(
                  "No executor for operation [" + operationType + "]");
      }
  
      public DdlResult executeDdlRequestBatch(
              DdlRequestBatch ddlRequestBatch, GraphDef graphDef, int partitionCount)
              throws InvalidProtocolBufferException {
          List<Operation> operations = new ArrayList<>();
          GraphDef tmpGraphDef = graphDef;
          for (DdlRequestBlob ddlRequestBlob : ddlRequestBatch) {
              OperationType operationType = ddlRequestBlob.getOperationType();
              ByteString ddlBlob = ddlRequestBlob.getBytes();
              DdlResult ddlResult =
                      getExecutor(operationType).execute(ddlBlob, tmpGraphDef, partitionCount);
              operations.addAll(ddlResult.getDdlOperations());
              tmpGraphDef = ddlResult.getGraphDef();
          }
          return new DdlResult(tmpGraphDef, operations);
      }
  }
  