Java tutorial
/** * Copyright (c) 2015-present Jorge Daz All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more * details. */ package jorgediazest.util.output; /** * @author Jorge Daz */ import com.liferay.portal.kernel.language.LanguageUtil; import com.liferay.portal.kernel.util.StringBundler; import com.liferay.portal.kernel.util.StringPool; import com.liferay.portal.kernel.util.Validator; import java.util.ArrayList; import java.util.List; import java.util.Locale; import java.util.ResourceBundle; import javax.portlet.PortletConfig; public class OutputUtils { public static String getCSVRow(List<String> rowData) { return getCSVRow(rowData, StringPool.COMMA); } public static String getCSVRow(List<String> rowData, String sep) { String row = StringPool.BLANK; for (String aux : rowData) { row = OutputUtils.addCell(row, aux, sep); } return row; } public static List<String> getHeaders(PortletConfig portletConfig, Locale locale, String[] headerKeys) { List<String> headers = new ArrayList<>(); for (int i = 0; i < headerKeys.length; i++) { ResourceBundle resourceBundle = portletConfig.getResourceBundle(locale); headers.add(LanguageUtil.get(resourceBundle, headerKeys[i])); } return headers; } public static String listStringToString(List<String> out) { if (Validator.isNull(out)) { return null; } StringBundler stringBundler = new StringBundler(out.size() * 2); for (String s : out) { stringBundler.append(s); stringBundler.append(StringPool.NEW_LINE); } return stringBundler.toString(); } protected static String addCell(String line, String cell, String sep) { if (cell.contains(StringPool.SPACE) || cell.contains(sep)) { cell = StringPool.QUOTE + cell + StringPool.QUOTE; } if (Validator.isNull(line)) { line = cell; } else { line += sep + cell; } return line; } }