/** * 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.drill.common.logical.data; import java.util.Collection; import java.util.List; import org.apache.drill.common.graph.GraphValue; import org.apache.drill.common.logical.ValidationError; import org.apache.drill.common.logical.data.visitors.LogicalVisitor; import com.fasterxml.jackson.annotation.JsonIdentityInfo; import com.fasterxml.jackson.annotation.JsonPropertyOrder; import com.fasterxml.jackson.annotation.JsonTypeInfo; import com.fasterxml.jackson.annotation.ObjectIdGenerators; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.node.ObjectNode; @JsonPropertyOrder({"@id", "memo", "input"}) // op will always be first since it is wrapped. @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = "@id") @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "op") public interface LogicalOperator extends GraphValue<LogicalOperator> { public void setupAndValidate(List<LogicalOperator> operators, Collection<ValidationError> errors); /** * Provides capability to build a set of output based on traversing a query graph tree. * * @param logicalVisitor * @return */ public <T, X, E extends Throwable> T accept(LogicalVisitor<T, X, E> logicalVisitor, X value) throws E; public void registerAsSubscriber(LogicalOperator operator); NodeBuilder<?> nodeBuilder(); public interface NodeBuilder<T extends LogicalOperator> { ObjectNode convert(ObjectMapper mapper, T operator, Integer inputId); } }