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[audio] Refactored use of filename, filename extension and separator (#…
…3837) * Refactored use of filename, filename extension and separator Signed-off-by: Christoph Weitkamp <github@christophweitkamp.de>
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...ome.core.audio/src/main/java/org/eclipse/smarthome/core/audio/utils/AudioStreamUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| /** | ||
| * Copyright (c) 2014-2017 by the respective copyright holders. | ||
| * All rights reserved. This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License v1.0 | ||
| * which accompanies this distribution, and is available at | ||
| * http://www.eclipse.org/legal/epl-v10.html | ||
| */ | ||
| package org.eclipse.smarthome.core.audio.utils; | ||
|
|
||
| /** | ||
| * Some general filename and extension utilities. | ||
| * | ||
| * @author Christoph Weitkamp - Initial contribution and API | ||
| * | ||
| */ | ||
| public class AudioStreamUtils { | ||
|
|
||
| public static final String EXTENSION_SEPARATOR = "."; | ||
|
|
||
| /** | ||
| * Gets the base name of a filename. | ||
| * | ||
| * @param filename the filename to query | ||
| * @return the base name of the file or an empty string if none exists or {@code null} if the filename is | ||
| * {@code null} | ||
| */ | ||
| public static String getBaseName(String filename) { | ||
| if (filename == null) { | ||
| return null; | ||
| } | ||
| final int index = filename.lastIndexOf(EXTENSION_SEPARATOR); | ||
| if (index == -1) { | ||
| return filename; | ||
| } else { | ||
| return filename.substring(0, index); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Gets the extension of a filename. | ||
| * | ||
| * @param filename the filename to retrieve the extension of | ||
| * @return the extension of the file or an empty string if none exists or {@code null} if the filename is | ||
| * {@code null} | ||
| */ | ||
| public static String getExtension(String filename) { | ||
| if (filename == null) { | ||
| return null; | ||
| } | ||
| final int index = filename.lastIndexOf(EXTENSION_SEPARATOR); | ||
| if (index == -1) { | ||
| return ""; | ||
| } else { | ||
| return filename.substring(index + 1); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Checks if the extension of a filename matches the given. | ||
| * | ||
| * @param filename the filename to check the extension of | ||
| * @param extension the extension to check for | ||
| * @return {@code true} if the filename has the specified extension | ||
| */ | ||
| public static boolean isExtension(String filename, String extension) { | ||
| if (filename == null) { | ||
| return false; | ||
| } | ||
| if (extension == null || extension.isEmpty()) { | ||
| return false; | ||
| } | ||
| return getExtension(filename).equals(extension); | ||
| } | ||
|
|
||
| } |
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