| /* |
| * 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.plan.expression.other; |
| |
| import org.apache.iotdb.db.queryengine.common.NodeRef; |
| import org.apache.iotdb.db.queryengine.plan.expression.Expression; |
| import org.apache.iotdb.db.queryengine.plan.expression.ExpressionType; |
| import org.apache.iotdb.db.queryengine.plan.expression.visitor.ExpressionVisitor; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.parameter.InputLocation; |
| import org.apache.iotdb.db.queryengine.transformation.dag.memory.LayerMemoryAssigner; |
| import org.apache.iotdb.db.queryengine.transformation.dag.udf.UDTFExecutor; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| import org.apache.iotdb.tsfile.utils.TimeDuration; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.time.ZoneId; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** Only used for representing GROUP BY TIME filter. */ |
| public class GroupByTimeExpression extends Expression { |
| |
| // [startTime, endTime] |
| private final long startTime; |
| private final long endTime; |
| |
| // time interval |
| private final TimeDuration interval; |
| |
| // sliding step |
| private final TimeDuration slidingStep; |
| |
| public GroupByTimeExpression( |
| long startTime, long endTime, TimeDuration interval, TimeDuration slidingStep) { |
| this.startTime = startTime; |
| this.endTime = endTime; |
| this.interval = interval; |
| this.slidingStep = slidingStep; |
| } |
| |
| public GroupByTimeExpression(ByteBuffer byteBuffer) { |
| this.startTime = ReadWriteIOUtils.readLong(byteBuffer); |
| this.endTime = ReadWriteIOUtils.readLong(byteBuffer); |
| this.interval = TimeDuration.deserialize(byteBuffer); |
| this.slidingStep = TimeDuration.deserialize(byteBuffer); |
| } |
| |
| public long getStartTime() { |
| return startTime; |
| } |
| |
| public long getEndTime() { |
| return endTime; |
| } |
| |
| public TimeDuration getInterval() { |
| return interval; |
| } |
| |
| public TimeDuration getSlidingStep() { |
| return slidingStep; |
| } |
| |
| @Override |
| public ExpressionType getExpressionType() { |
| return ExpressionType.GROUP_BY_TIME; |
| } |
| |
| @Override |
| public boolean isMappable(Map<NodeRef<Expression>, TSDataType> expressionTypes) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| protected boolean isConstantOperandInternal() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void constructUdfExecutors( |
| Map<String, UDTFExecutor> expressionName2Executor, ZoneId zoneId) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void bindInputLayerColumnIndexWithExpression( |
| Map<String, List<InputLocation>> inputLocations) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void updateStatisticsForMemoryAssigner(LayerMemoryAssigner memoryAssigner) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public List<Expression> getExpressions() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String getOutputSymbolInternal() { |
| return getExpressionStringInternal(); |
| } |
| |
| @Override |
| protected String getExpressionStringInternal() { |
| return "group by time([" |
| + startTime |
| + ", " |
| + endTime |
| + "], " |
| + interval |
| + ", " |
| + slidingStep |
| + ")"; |
| } |
| |
| @Override |
| protected void serialize(ByteBuffer byteBuffer) { |
| ReadWriteIOUtils.write(startTime, byteBuffer); |
| ReadWriteIOUtils.write(endTime, byteBuffer); |
| interval.serialize(byteBuffer); |
| slidingStep.serialize(byteBuffer); |
| } |
| |
| @Override |
| protected void serialize(DataOutputStream stream) throws IOException { |
| ReadWriteIOUtils.write(startTime, stream); |
| ReadWriteIOUtils.write(endTime, stream); |
| interval.serialize(stream); |
| slidingStep.serialize(stream); |
| } |
| |
| @Override |
| public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) { |
| return visitor.visitGroupByTimeExpression(this, context); |
| } |
| } |