| /** |
| * 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.tajo.plan; |
| |
| import org.apache.tajo.plan.logical.LogicalNode; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| |
| public class PlanString { |
| final StringBuilder title; |
| |
| final List<String> explanations = new ArrayList<>(); |
| final List<String> details = new ArrayList<>(); |
| |
| StringBuilder currentExplanation; |
| StringBuilder currentDetail; |
| |
| public PlanString(LogicalNode node) { |
| this.title = new StringBuilder(node.getType().name() + "(" + node.getPID() + ")"); |
| } |
| |
| public PlanString(String title) { |
| this.title = new StringBuilder(title); |
| } |
| |
| public PlanString appendTitle(String str) { |
| title.append(str); |
| return this; |
| } |
| |
| public PlanString addExplan(String explain) { |
| flushCurrentExplanation(); |
| currentExplanation = new StringBuilder(explain); |
| return this; |
| } |
| |
| public PlanString appendExplain(String explain) { |
| if (currentExplanation == null) { |
| currentExplanation = new StringBuilder(); |
| } |
| currentExplanation.append(explain); |
| return this; |
| } |
| |
| public PlanString addDetail(String detail) { |
| flushCurrentDetail(); |
| currentDetail = new StringBuilder(detail); |
| return this; |
| } |
| |
| public PlanString appendDetail(String detail) { |
| if (currentDetail == null) { |
| currentDetail = new StringBuilder(); |
| } |
| currentDetail.append(detail); |
| return this; |
| |
| } |
| |
| public String getTitle() { |
| return title.toString(); |
| } |
| |
| public List<String> getExplanations() { |
| flushCurrentExplanation(); |
| return explanations; |
| } |
| |
| public List<String> getDetails() { |
| flushCurrentDetail(); |
| return details; |
| } |
| |
| private void flushCurrentExplanation() { |
| if (currentExplanation != null) { |
| explanations.add(currentExplanation.toString()); |
| currentExplanation = null; |
| } |
| } |
| |
| private void flushCurrentDetail() { |
| if (currentDetail != null) { |
| details.add(currentDetail.toString()); |
| currentDetail = null; |
| } |
| } |
| |
| public String toString() { |
| StringBuilder output = new StringBuilder(); |
| output.append(getTitle()).append("\n"); |
| |
| for (String str : getExplanations()) { |
| output.append(" => ").append(str).append("\n"); |
| } |
| |
| for (String str : getDetails()) { |
| output.append(" => ").append(str).append("\n"); |
| } |
| return output.toString(); |
| } |
| } |