001/* 002 * SonarQube 003 * Copyright (C) 2009-2018 SonarSource SA 004 * mailto:info AT sonarsource DOT com 005 * 006 * This program is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * This program is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public License 017 * along with this program; if not, write to the Free Software Foundation, 018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 019 */ 020package org.sonar.api.utils.text; 021 022import org.apache.commons.lang.StringEscapeUtils; 023 024import java.io.IOException; 025import java.io.Writer; 026 027/** 028 * @since 4.2 029 */ 030public class CsvWriter { 031 032 private final Writer writer; 033 private static final String VALUE_SEPARATOR = ","; 034 private static final String LINE_SEPARATOR = "\r\n"; 035 036 private CsvWriter(Writer writer) { 037 this.writer = writer; 038 } 039 040 public static CsvWriter of(Writer writer) { 041 return new CsvWriter(writer); 042 } 043 044 public CsvWriter values(String... values) { 045 for (int index = 0; index < values.length; index++) { 046 if (index > 0) { 047 write(VALUE_SEPARATOR); 048 } 049 String value = values[index]; 050 if (value != null) { 051 write(StringEscapeUtils.escapeCsv(value)); 052 } 053 if (index == values.length - 1) { 054 write(LINE_SEPARATOR); 055 } 056 } 057 return this; 058 } 059 060 public void close() { 061 try { 062 writer.close(); 063 } catch (IOException e) { 064 throw new WriterException("Fail to close CSV output", e); 065 } 066 } 067 068 private void write(String s) { 069 try { 070 writer.append(s); 071 } catch (IOException e) { 072 throw new WriterException("Fail to generate CSV with value: " + s, e); 073 } 074 } 075}