| /* |
| * 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.transformation.dag.transformer.multi; |
| |
| import org.apache.iotdb.db.exception.query.QueryProcessException; |
| import org.apache.iotdb.db.queryengine.transformation.api.LayerRowReader; |
| import org.apache.iotdb.db.queryengine.transformation.api.YieldableState; |
| import org.apache.iotdb.db.queryengine.transformation.dag.udf.UDTFExecutor; |
| import org.apache.iotdb.udf.api.access.Row; |
| |
| import org.apache.tsfile.utils.Binary; |
| import org.apache.tsfile.write.UnSupportedDataTypeException; |
| |
| import java.io.IOException; |
| import java.util.Objects; |
| |
| public class MappableUDFQueryRowTransformer extends UDFQueryTransformer { |
| |
| protected final LayerRowReader layerRowReader; |
| private final boolean isLayerRowReaderConstant; |
| |
| public MappableUDFQueryRowTransformer(LayerRowReader layerRowReader, UDTFExecutor executor) { |
| super(executor); |
| this.layerRowReader = layerRowReader; |
| this.isLayerRowReaderConstant = false; |
| } |
| |
| @Override |
| protected boolean cacheValue() throws QueryProcessException, IOException { |
| if (!layerRowReader.next()) { |
| return false; |
| } |
| |
| if (!isLayerRowReaderConstant) { |
| cachedTime = layerRowReader.currentTime(); |
| } |
| |
| if (layerRowReader.isCurrentNull()) { |
| currentNull = true; |
| } else { |
| Row row = layerRowReader.currentRow(); |
| execute(row); |
| } |
| |
| layerRowReader.readyForNext(); |
| return true; |
| } |
| |
| @Override |
| protected YieldableState yieldValue() throws Exception { |
| final YieldableState yieldableState = layerRowReader.yield(); |
| if (!YieldableState.YIELDABLE.equals(yieldableState)) { |
| return yieldableState; |
| } |
| |
| if (!isLayerRowReaderConstant) { |
| cachedTime = layerRowReader.currentTime(); |
| } |
| |
| if (layerRowReader.isCurrentNull()) { |
| currentNull = true; |
| } else { |
| Row row = layerRowReader.currentRow(); |
| execute(row); |
| } |
| |
| layerRowReader.readyForNext(); |
| return YieldableState.YIELDABLE; |
| } |
| |
| private void execute(Row row) { |
| executor.execute(row); |
| Object currentValue = executor.getCurrentValue(); |
| if (Objects.isNull(currentValue)) { |
| currentNull = true; |
| return; |
| } |
| switch (tsDataType) { |
| case INT32: |
| cachedInt = (int) currentValue; |
| break; |
| case INT64: |
| cachedLong = (long) currentValue; |
| break; |
| case FLOAT: |
| cachedFloat = (float) currentValue; |
| break; |
| case DOUBLE: |
| cachedDouble = (double) currentValue; |
| break; |
| case BOOLEAN: |
| cachedBoolean = (boolean) currentValue; |
| break; |
| case TEXT: |
| cachedBinary = (Binary) currentValue; |
| break; |
| default: |
| throw new UnSupportedDataTypeException(tsDataType.toString()); |
| } |
| } |
| |
| @Override |
| public boolean isConstantPointReader() { |
| return isLayerRowReaderConstant; |
| } |
| } |