| /* |
| * 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.schemaengine.schemaregion.utils; |
| |
| import org.apache.iotdb.commons.schema.node.IMNode; |
| import org.apache.iotdb.commons.schema.node.role.IDeviceMNode; |
| import org.apache.iotdb.commons.schema.node.role.IInternalMNode; |
| import org.apache.iotdb.commons.schema.node.utils.IMNodeFactory; |
| import org.apache.iotdb.db.schemaengine.schemaregion.mtree.impl.mem.mnode.info.DeviceInfo; |
| import org.apache.iotdb.db.schemaengine.template.Template; |
| |
| import org.apache.tsfile.write.schema.IMeasurementSchema; |
| |
| import java.util.Iterator; |
| |
| public class MNodeUtils { |
| |
| /** |
| * When a measurement, represented by template or MeasurementMNode, is going to be added to a |
| * node, the node should be set to entity. Before invoking this method, lock the related MTree |
| * part first. |
| * |
| * @param node node to be transformed |
| */ |
| public static <N extends IMNode<N>> boolean setToEntity(IMNode<N> node) { |
| IInternalMNode<N> internalMNode = node.getAsInternalMNode(); |
| if (!internalMNode.isDevice()) { |
| internalMNode.setDeviceInfo(new DeviceInfo<>()); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * When there's no measurement, represented by template or MeasurementMNode, is under this |
| * entityMNode, it should not act as entity anymore. Before invoking this method, lock related |
| * MTree structure first. |
| * |
| * @param entityMNode node to be transformed |
| */ |
| public static <N extends IMNode<N>> boolean setToInternal(IDeviceMNode<N> entityMNode) { |
| IInternalMNode<N> internalMNode = entityMNode.getAsInternalMNode(); |
| if (internalMNode.isDevice()) { |
| internalMNode.setDeviceInfo(null); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| public static <N extends IMNode<N>> N getChild( |
| Template template, String name, IMNodeFactory<N> nodeFactor) { |
| IMeasurementSchema schema = template.getSchema(name); |
| return schema == null |
| ? null |
| : nodeFactor |
| .createMeasurementMNode(null, name, template.getSchema(name), null) |
| .getAsMNode(); |
| } |
| |
| public static <N extends IMNode<N>> Iterator<N> getChildren( |
| Template template, IMNodeFactory<N> nodeFactor) { |
| return new Iterator<N>() { |
| private final Iterator<IMeasurementSchema> schemas = |
| template.getSchemaMap().values().iterator(); |
| |
| @Override |
| public boolean hasNext() { |
| return schemas.hasNext(); |
| } |
| |
| @Override |
| public N next() { |
| IMeasurementSchema schema = schemas.next(); |
| return nodeFactor |
| .createMeasurementMNode(null, schema.getMeasurementId(), schema, null) |
| .getAsMNode(); |
| } |
| }; |
| } |
| } |