| /* |
| * 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.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import org.apache.drill.common.graph.GraphVisitor; |
| import org.apache.drill.common.logical.ValidationError; |
| |
| import com.fasterxml.jackson.annotation.JsonInclude; |
| import com.fasterxml.jackson.annotation.JsonInclude.Include; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| |
| |
| public abstract class LogicalOperatorBase implements LogicalOperator{ |
| |
| private final List<LogicalOperator> children = new ArrayList<>(); |
| |
| private String memo; |
| |
| @Override |
| public final int hashCode() { |
| return super.hashCode(); |
| } |
| |
| @Override |
| public void setupAndValidate(List<LogicalOperator> operators, Collection<ValidationError> errors) { |
| // TODO: remove this and implement individually. |
| } |
| |
| @Override |
| public NodeBuilder<?> nodeBuilder() { |
| // FIXME: Implement this on all logical operators |
| throw new UnsupportedOperationException("Not yet implemented."); |
| } |
| |
| @Override |
| public void accept(GraphVisitor<LogicalOperator> visitor) { |
| if (visitor.enter(this)) { |
| visitor.leave(this); |
| } |
| } |
| |
| @Override |
| public void registerAsSubscriber(LogicalOperator operator) { |
| if (operator == null) { |
| throw new IllegalArgumentException("You attempted to register a null operators."); |
| } |
| children.add(operator); |
| } |
| |
| @Override |
| public String toString() { |
| return this.getClass().getSimpleName() + " [memo=" + memo + "]"; |
| } |
| |
| @JsonInclude(Include.NON_EMPTY) |
| @JsonProperty("memo") |
| public String getMemo() { |
| return memo; |
| } |
| |
| public void setMemo(String memo) { |
| this.memo = memo; |
| } |
| } |