iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/metedata/read/SchemaFetchMergeNode.java

/*
 * 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.iotdb.db.queryengine.plan.planner.plan.node.metedata.read;

import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeType;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor;

import org.apache.tsfile.utils.ReadWriteIOUtils;

import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/** This class defines the scanned result merge task of schema fetcher. */
public class SchemaFetchMergeNode extends AbstractSchemaMergeNode {

  private List<String> storageGroupList;

  public SchemaFetchMergeNode(PlanNodeId id, List<String> storageGroupList) {
    super(id);
    this.storageGroupList = storageGroupList;
  }

  public List<String> getStorageGroupList() {
    return storageGroupList;
  }

  public void setStorageGroupList(List<String> storageGroupList) {
    this.storageGroupList = storageGroupList;
  }

  @Override
  public PlanNodeType getType() {
    return PlanNodeType.SCHEMA_FETCH_MERGE;
  }

  @Override
  public PlanNode clone() {
    return new SchemaFetchMergeNode(getPlanNodeId(), storageGroupList);
  }

  @Override
  protected void serializeAttributes(ByteBuffer byteBuffer) {
    PlanNodeType.SCHEMA_FETCH_MERGE.serialize(byteBuffer);
    ReadWriteIOUtils.write(storageGroupList.size(), byteBuffer);
    for (String storageGroup : storageGroupList) {
      ReadWriteIOUtils.write(storageGroup, byteBuffer);
    }
  }

  @Override
  protected void serializeAttributes(DataOutputStream stream) throws IOException {
    PlanNodeType.SCHEMA_FETCH_MERGE.serialize(stream);
    ReadWriteIOUtils.write(storageGroupList.size(), stream);
    for (String storageGroup : storageGroupList) {
      ReadWriteIOUtils.write(storageGroup, stream);
    }
  }

  public static PlanNode deserialize(ByteBuffer byteBuffer) {
    int size = ReadWriteIOUtils.readInt(byteBuffer);
    List<String> storageGroupList = new ArrayList<>(size);
    for (int i = 0; i < size; i++) {
      storageGroupList.add(ReadWriteIOUtils.readString(byteBuffer));
    }
    PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer);
    return new SchemaFetchMergeNode(planNodeId, storageGroupList);
  }

  @Override
  public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
    return visitor.visitSchemaFetchMerge(this, context);
  }

  @Override
  public String toString() {
    return String.format("SchemaFetchMergeNode-%s", getPlanNodeId());
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    if (!super.equals(o)) return false;
    SchemaFetchMergeNode that = (SchemaFetchMergeNode) o;
    return Objects.equals(storageGroupList, that.storageGroupList);
  }

  @Override
  public int hashCode() {
    return Objects.hash(super.hashCode(), storageGroupList);
  }
}