| /* |
| * 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.binary; |
| |
| import org.apache.iotdb.db.exception.query.QueryProcessException; |
| import org.apache.iotdb.db.queryengine.transformation.api.LayerPointReader; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.write.UnSupportedDataTypeException; |
| |
| import java.io.IOException; |
| |
| public abstract class CompareBinaryTransformer extends BinaryTransformer { |
| |
| @FunctionalInterface |
| protected interface Evaluator { |
| |
| boolean evaluate() throws QueryProcessException, IOException; |
| } |
| |
| protected final Evaluator evaluator; |
| |
| protected CompareBinaryTransformer( |
| LayerPointReader leftPointReader, LayerPointReader rightPointReader) |
| throws UnSupportedDataTypeException { |
| super(leftPointReader, rightPointReader); |
| evaluator = |
| TSDataType.TEXT.equals(leftPointReaderDataType) |
| ? constructTextEvaluator() |
| : constructNumberEvaluator(); |
| } |
| |
| protected abstract Evaluator constructNumberEvaluator(); |
| |
| protected abstract Evaluator constructTextEvaluator(); |
| |
| @Override |
| protected final void checkType() { |
| if (leftPointReaderDataType.equals(rightPointReaderDataType)) { |
| return; |
| } |
| |
| if (leftPointReaderDataType.equals(TSDataType.BOOLEAN) |
| || rightPointReaderDataType.equals(TSDataType.BOOLEAN)) { |
| throw new UnSupportedDataTypeException(TSDataType.BOOLEAN.toString()); |
| } |
| if (leftPointReaderDataType.equals(TSDataType.TEXT) |
| || rightPointReaderDataType.equals(TSDataType.TEXT)) { |
| throw new UnSupportedDataTypeException(TSDataType.TEXT.toString()); |
| } |
| } |
| |
| @Override |
| protected final void transformAndCache() throws QueryProcessException, IOException { |
| cachedBoolean = evaluator.evaluate(); |
| } |
| |
| @Override |
| public TSDataType getDataType() { |
| return TSDataType.BOOLEAN; |
| } |
| } |