| /* |
| * 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.util; |
| |
| import org.apache.iotdb.commons.udf.utils.UDFBinaryTransformer; |
| import org.apache.iotdb.db.exception.query.QueryProcessException; |
| import org.apache.iotdb.db.queryengine.transformation.api.LayerPointReader; |
| import org.apache.iotdb.db.queryengine.transformation.api.YieldableState; |
| import org.apache.iotdb.db.queryengine.transformation.dag.input.IUDFInputDataSet; |
| import org.apache.iotdb.db.queryengine.transformation.datastructure.row.ElasticSerializableRowRecordList; |
| import org.apache.iotdb.db.queryengine.transformation.datastructure.tv.ElasticSerializableTVList; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| |
| import java.io.IOException; |
| |
| public class LayerCacheUtils { |
| |
| private LayerCacheUtils() {} |
| |
| public static YieldableState yieldPoints( |
| TSDataType dataType, |
| LayerPointReader source, |
| ElasticSerializableTVList target, |
| int pointNumber) |
| throws Exception { |
| int count = 0; |
| while (count < pointNumber) { |
| final YieldableState yieldableState = yieldPoint(dataType, source, target); |
| if (yieldableState != YieldableState.YIELDABLE) { |
| return yieldableState; |
| } |
| ++count; |
| } |
| return YieldableState.YIELDABLE; |
| } |
| |
| public static YieldableState yieldPoint( |
| TSDataType dataType, LayerPointReader source, ElasticSerializableTVList target) |
| throws Exception { |
| final YieldableState yieldableState = source.yield(); |
| if (yieldableState != YieldableState.YIELDABLE) { |
| return yieldableState; |
| } |
| |
| if (source.isCurrentNull()) { |
| target.putNull(source.currentTime()); |
| } else { |
| switch (dataType) { |
| case INT32: |
| target.putInt(source.currentTime(), source.currentInt()); |
| break; |
| case INT64: |
| target.putLong(source.currentTime(), source.currentLong()); |
| break; |
| case FLOAT: |
| target.putFloat(source.currentTime(), source.currentFloat()); |
| break; |
| case DOUBLE: |
| target.putDouble(source.currentTime(), source.currentDouble()); |
| break; |
| case BOOLEAN: |
| target.putBoolean(source.currentTime(), source.currentBoolean()); |
| break; |
| case TEXT: |
| target.putBinary( |
| source.currentTime(), |
| UDFBinaryTransformer.transformToUDFBinary(source.currentBinary())); |
| break; |
| default: |
| throw new UnsupportedOperationException(dataType.name()); |
| } |
| } |
| |
| source.readyForNext(); |
| |
| return YieldableState.YIELDABLE; |
| } |
| |
| /** |
| * try to generate rows from source. |
| * |
| * @return number of actually collected, which may be less than or equals to rowsNumber. |
| */ |
| public static YieldableState yieldRows( |
| IUDFInputDataSet source, ElasticSerializableRowRecordList target, int rowsNumber) |
| throws Exception { |
| int count = 0; |
| while (count < rowsNumber) { |
| final YieldableState yieldableState = yieldRow(source, target); |
| if (yieldableState != YieldableState.YIELDABLE) { |
| return yieldableState; |
| } |
| ++count; |
| } |
| return YieldableState.YIELDABLE; |
| } |
| |
| public static YieldableState yieldRow( |
| IUDFInputDataSet source, ElasticSerializableRowRecordList target) throws Exception { |
| final YieldableState yieldableState = source.canYieldNextRowInObjects(); |
| |
| if (yieldableState == YieldableState.YIELDABLE) { |
| target.put(source.nextRowInObjects()); |
| } |
| return yieldableState; |
| } |
| |
| /** |
| * cachePoints in ElasticSerializableTVList. |
| * |
| * @return number of actually collected, which may be less than or equals to pointNumber. |
| */ |
| public static int cachePoints( |
| TSDataType dataType, |
| LayerPointReader source, |
| ElasticSerializableTVList target, |
| int pointNumber) |
| throws QueryProcessException, IOException { |
| int count = 0; |
| while (count < pointNumber && cachePoint(dataType, source, target)) { |
| ++count; |
| } |
| return count; |
| } |
| |
| public static boolean cachePoint( |
| TSDataType dataType, LayerPointReader source, ElasticSerializableTVList target) |
| throws IOException, QueryProcessException { |
| if (!source.next()) { |
| return false; |
| } |
| |
| if (source.isCurrentNull()) { |
| target.putNull(source.currentTime()); |
| } else { |
| switch (dataType) { |
| case INT32: |
| target.putInt(source.currentTime(), source.currentInt()); |
| break; |
| case INT64: |
| target.putLong(source.currentTime(), source.currentLong()); |
| break; |
| case FLOAT: |
| target.putFloat(source.currentTime(), source.currentFloat()); |
| break; |
| case DOUBLE: |
| target.putDouble(source.currentTime(), source.currentDouble()); |
| break; |
| case BOOLEAN: |
| target.putBoolean(source.currentTime(), source.currentBoolean()); |
| break; |
| case TEXT: |
| target.putBinary( |
| source.currentTime(), |
| UDFBinaryTransformer.transformToUDFBinary(source.currentBinary())); |
| break; |
| default: |
| throw new UnsupportedOperationException(dataType.name()); |
| } |
| } |
| |
| source.readyForNext(); |
| |
| return true; |
| } |
| |
| /** |
| * cache rows in ElasticSerializableRowRecordList. |
| * |
| * @return number of actually collected, which may be less than or equals to rowsNumber. |
| */ |
| public static int cacheRows( |
| IUDFInputDataSet source, ElasticSerializableRowRecordList target, int rowsNumber) |
| throws QueryProcessException, IOException { |
| int count = 0; |
| while (count < rowsNumber && cacheRow(source, target)) { |
| ++count; |
| } |
| return count; |
| } |
| |
| public static boolean cacheRow(IUDFInputDataSet source, ElasticSerializableRowRecordList target) |
| throws IOException, QueryProcessException { |
| if (source.hasNextRowInObjects()) { |
| target.put(source.nextRowInObjects()); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } |