| /* |
| * 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.iotdb.db.queryengine.transformation.api.YieldableState; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.write.UnSupportedDataTypeException; |
| |
| import java.io.IOException; |
| |
| public abstract class LogicBinaryTransformer extends BinaryTransformer { |
| |
| protected LogicBinaryTransformer( |
| LayerPointReader leftPointReader, LayerPointReader rightPointReader) { |
| super(leftPointReader, rightPointReader); |
| } |
| |
| @Override |
| protected void checkType() { |
| if (leftPointReaderDataType != TSDataType.BOOLEAN |
| || rightPointReaderDataType != TSDataType.BOOLEAN) { |
| throw new UnSupportedDataTypeException("Unsupported data type: " + TSDataType.BOOLEAN); |
| } |
| } |
| |
| @Override |
| public YieldableState yieldValue() throws Exception { |
| final YieldableState leftYieldableState = leftPointReader.yield(); |
| final YieldableState rightYieldableState = rightPointReader.yield(); |
| |
| if (leftYieldableState == YieldableState.YIELDABLE |
| && rightYieldableState == YieldableState.YIELDABLE) { |
| cacheValue(leftPointReader, rightPointReader); |
| return YieldableState.YIELDABLE; |
| } |
| |
| if (leftYieldableState == YieldableState.NOT_YIELDABLE_WAITING_FOR_DATA |
| || rightYieldableState == YieldableState.NOT_YIELDABLE_WAITING_FOR_DATA) { |
| return YieldableState.NOT_YIELDABLE_WAITING_FOR_DATA; |
| } |
| |
| if (leftYieldableState == YieldableState.NOT_YIELDABLE_NO_MORE_DATA |
| && rightYieldableState == YieldableState.NOT_YIELDABLE_NO_MORE_DATA) { |
| return YieldableState.NOT_YIELDABLE_NO_MORE_DATA; |
| } |
| |
| if (leftYieldableState == YieldableState.YIELDABLE && !isLeftPointReaderConstant) { |
| cacheValue(leftPointReader); |
| return YieldableState.YIELDABLE; |
| } |
| if (rightYieldableState == YieldableState.YIELDABLE && !isRightPointReaderConstant) { |
| cacheValue(rightPointReader); |
| return YieldableState.YIELDABLE; |
| } |
| |
| return YieldableState.NOT_YIELDABLE_NO_MORE_DATA; |
| } |
| |
| @Override |
| protected boolean cacheValue() throws QueryProcessException, IOException { |
| final boolean leftHasNext = leftPointReader.next(); |
| final boolean rightHasNext = rightPointReader.next(); |
| |
| if (leftHasNext && rightHasNext) { |
| return cacheValue(leftPointReader, rightPointReader); |
| } |
| |
| if (!leftHasNext && !rightHasNext) { |
| return false; |
| } |
| |
| if (leftHasNext && !isLeftPointReaderConstant) { |
| return cacheValue(leftPointReader); |
| } |
| if (rightHasNext && !isRightPointReaderConstant) { |
| return cacheValue(rightPointReader); |
| } |
| |
| return false; |
| } |
| |
| private boolean cacheValue(LayerPointReader reader) throws IOException { |
| cachedTime = reader.currentTime(); |
| cachedBoolean = !reader.isCurrentNull() && evaluate(false, reader.currentBoolean()); |
| reader.readyForNext(); |
| return true; |
| } |
| |
| private boolean cacheValue(LayerPointReader leftPointReader, LayerPointReader rightPointReader) |
| throws IOException { |
| final boolean leftBoolean = |
| !leftPointReader.isCurrentNull() && leftPointReader.currentBoolean(); |
| final boolean rightBoolean = |
| !rightPointReader.isCurrentNull() && rightPointReader.currentBoolean(); |
| |
| if (isCurrentConstant) { |
| cachedBoolean = evaluate(leftBoolean, rightBoolean); |
| return true; |
| } |
| |
| if (isLeftPointReaderConstant) { |
| cachedTime = rightPointReader.currentTime(); |
| cachedBoolean = evaluate(leftBoolean, rightBoolean); |
| rightPointReader.readyForNext(); |
| return true; |
| } |
| |
| if (isRightPointReaderConstant) { |
| cachedTime = leftPointReader.currentTime(); |
| cachedBoolean = evaluate(leftBoolean, rightBoolean); |
| leftPointReader.readyForNext(); |
| return true; |
| } |
| |
| final long leftTime = leftPointReader.currentTime(); |
| final long rightTime = rightPointReader.currentTime(); |
| |
| if (leftTime < rightTime) { |
| cachedTime = leftTime; |
| cachedBoolean = evaluate(leftBoolean, false); |
| leftPointReader.readyForNext(); |
| return true; |
| } |
| |
| if (rightTime < leftTime) { |
| cachedTime = rightTime; |
| cachedBoolean = evaluate(false, rightBoolean); |
| rightPointReader.readyForNext(); |
| return true; |
| } |
| |
| // == rightTime |
| cachedTime = leftTime; |
| cachedBoolean = evaluate(leftBoolean, rightBoolean); |
| leftPointReader.readyForNext(); |
| rightPointReader.readyForNext(); |
| return true; |
| } |
| |
| protected abstract boolean evaluate(boolean leftOperand, boolean rightOperand); |
| |
| @Override |
| protected void transformAndCache() throws QueryProcessException, IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public TSDataType getDataType() { |
| return TSDataType.BOOLEAN; |
| } |
| } |