| /* |
| * 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.write.view; |
| |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.path.PathDeserializeUtil; |
| import org.apache.iotdb.commons.schema.view.viewExpression.ViewExpression; |
| 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.exception.NotImplementedException; |
| 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.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| public class AlterLogicalViewNode extends PlanNode { |
| |
| /** |
| * A map from target path to source expression. Yht target path is the name of this logical view, |
| * and the source expression is the data source of this view. |
| */ |
| private final Map<PartialPath, ViewExpression> viewPathToSourceMap; |
| |
| public AlterLogicalViewNode(PlanNodeId id, Map<PartialPath, ViewExpression> viewPathToSourceMap) { |
| super(id); |
| this.viewPathToSourceMap = viewPathToSourceMap; |
| } |
| |
| public Map<PartialPath, ViewExpression> getViewPathToSourceMap() { |
| return viewPathToSourceMap; |
| } |
| |
| // region Interfaces in WritePlanNode or PlanNode |
| |
| @Override |
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { |
| return visitor.visitAlterLogicalView(this, context); |
| } |
| |
| @Override |
| public List<PlanNode> getChildren() { |
| return new ArrayList<>(); |
| } |
| |
| @Override |
| public void addChild(PlanNode child) { |
| // do nothing. this node should never have any child |
| } |
| |
| @Override |
| public PlanNodeType getType() { |
| return PlanNodeType.ALTER_LOGICAL_VIEW; |
| } |
| |
| @Override |
| public PlanNode clone() { |
| // TODO: CRTODO, complete this method |
| throw new NotImplementedException("Clone of AlterLogicalNode is not implemented"); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| AlterLogicalViewNode that = (AlterLogicalViewNode) obj; |
| return (this.getPlanNodeId().equals(that.getPlanNodeId()) |
| && Objects.equals(this.viewPathToSourceMap, that.viewPathToSourceMap)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(this.getPlanNodeId(), this.viewPathToSourceMap); |
| } |
| |
| @Override |
| public int allowedChildCount() { |
| // this node should never have any child |
| return NO_CHILD_ALLOWED; |
| } |
| |
| @Override |
| public List<String> getOutputColumnNames() { |
| // TODO: CRTODO, complete this method |
| throw new NotImplementedException( |
| "getOutputColumnNames of AlterLogicalViewNode is not implemented"); |
| } |
| |
| @Override |
| protected void serializeAttributes(ByteBuffer byteBuffer) { |
| PlanNodeType.ALTER_LOGICAL_VIEW.serialize(byteBuffer); |
| // serialize other member variables for this node |
| ReadWriteIOUtils.write(this.viewPathToSourceMap.size(), byteBuffer); |
| for (Map.Entry<PartialPath, ViewExpression> entry : viewPathToSourceMap.entrySet()) { |
| entry.getKey().serialize(byteBuffer); |
| ViewExpression.serialize(entry.getValue(), byteBuffer); |
| } |
| } |
| |
| @Override |
| protected void serializeAttributes(DataOutputStream stream) throws IOException { |
| PlanNodeType.ALTER_LOGICAL_VIEW.serialize(stream); |
| // serialize other member variables for this node |
| ReadWriteIOUtils.write(this.viewPathToSourceMap.size(), stream); |
| for (Map.Entry<PartialPath, ViewExpression> entry : viewPathToSourceMap.entrySet()) { |
| entry.getKey().serialize(stream); |
| ViewExpression.serialize(entry.getValue(), stream); |
| } |
| } |
| |
| public static AlterLogicalViewNode deserialize(ByteBuffer byteBuffer) { |
| // deserialize member variables |
| Map<PartialPath, ViewExpression> viewPathToSourceMap = new HashMap<>(); |
| int size = byteBuffer.getInt(); |
| PartialPath path; |
| ViewExpression viewExpression; |
| for (int i = 0; i < size; i++) { |
| path = (PartialPath) PathDeserializeUtil.deserialize(byteBuffer); |
| viewExpression = ViewExpression.deserialize(byteBuffer); |
| viewPathToSourceMap.put(path, viewExpression); |
| } |
| // deserialize PlanNodeId next |
| PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer); |
| return new AlterLogicalViewNode(planNodeId, viewPathToSourceMap); |
| } |
| // endregion |
| } |