001/*
002 * SonarQube, open source software quality management tool.
003 * Copyright (C) 2008-2014 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * SonarQube 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 * SonarQube 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 = ",", LINE_SEPARATOR = "\r\n";
034
035  private CsvWriter(Writer writer) {
036    this.writer = writer;
037  }
038
039  public static CsvWriter of(Writer writer) {
040    return new CsvWriter(writer);
041  }
042
043  public CsvWriter values(String... values) {
044    for (int index = 0; index < values.length; index++) {
045      if (index > 0) {
046        write(VALUE_SEPARATOR);
047      }
048      String value = values[index];
049      if (value != null) {
050        write(StringEscapeUtils.escapeCsv(value));
051      }
052      if (index == values.length - 1) {
053        write(LINE_SEPARATOR);
054      }
055    }
056    return this;
057  }
058
059  public void close() {
060    try {
061      writer.close();
062    } catch (IOException e) {
063      throw new WriterException("Fail to close CSV output", e);
064    }
065  }
066
067  private void write(String s) {
068    try {
069      writer.append(s);
070    } catch (IOException e) {
071      throw new WriterException("Fail to generate CSV with value: " + s, e);
072    }
073  }
074}