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- /*
- * SonarQube
- * Copyright (C) 2009-2019 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program 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 3 of the License, or (at your option) any later version.
- *
- * This program 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.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- package org.sonarqube.ws;
-
- import static java.util.Objects.requireNonNull;
-
- /**
- * Extracted from org.apache.commons.io.FilenameUtils
- */
- public class FilenameUtils {
-
- private static final int NOT_FOUND = -1;
-
- private static final char EXTENSION_SEPARATOR = '.';
- /**
- * The Unix separator character.
- */
- private static final char UNIX_SEPARATOR = '/';
-
- /**
- * The Windows separator character.
- */
- private static final char WINDOWS_SEPARATOR = '\\';
-
- private FilenameUtils() {
- // Only static methods here
- }
-
- public static String getExtension(String filename) {
- requireNonNull(filename);
- final int index = indexOfExtension(filename);
- if (index == NOT_FOUND) {
- return "";
- } else {
- return filename.substring(index + 1);
- }
- }
-
- private static int indexOfExtension(String filename) {
- final int extensionPos = filename.lastIndexOf(EXTENSION_SEPARATOR);
- final int lastSeparator = indexOfLastSeparator(filename);
- return lastSeparator > extensionPos ? NOT_FOUND : extensionPos;
- }
-
- private static int indexOfLastSeparator(String filename) {
- final int lastUnixPos = filename.lastIndexOf(UNIX_SEPARATOR);
- final int lastWindowsPos = filename.lastIndexOf(WINDOWS_SEPARATOR);
- return Math.max(lastUnixPos, lastWindowsPos);
- }
- }
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