| /* |
| * 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.udf; |
| |
| import org.apache.iotdb.commons.udf.service.UDFClassLoaderManager; |
| import org.apache.iotdb.db.queryengine.plan.expression.Expression; |
| import org.apache.iotdb.db.queryengine.plan.expression.multi.FunctionExpression; |
| import org.apache.iotdb.db.service.TemporaryQueryDataFileService; |
| |
| import java.time.ZoneId; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| public class UDTFContext { |
| |
| protected final ZoneId zoneId; |
| |
| protected Map<String, UDTFExecutor> expressionName2Executor = new HashMap<>(); |
| |
| public UDTFContext(ZoneId zoneId) { |
| this.zoneId = zoneId; |
| } |
| |
| public void constructUdfExecutors(Expression[] outputExpressions) { |
| for (Expression expression : outputExpressions) { |
| expression.constructUdfExecutors(expressionName2Executor, zoneId); |
| } |
| } |
| |
| public void finalizeUDFExecutors(String queryId) { |
| try { |
| for (UDTFExecutor executor : expressionName2Executor.values()) { |
| executor.beforeDestroy(); |
| } |
| } finally { |
| UDFClassLoaderManager.getInstance().finalizeUDFQuery(queryId); |
| // close and delete UDF temp files |
| TemporaryQueryDataFileService.getInstance().deregister(queryId); |
| } |
| } |
| |
| public UDTFExecutor getExecutorByFunctionExpression(FunctionExpression functionExpression) { |
| return expressionName2Executor.get(functionExpression.getExpressionString()); |
| } |
| } |