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120 lines
3.8 KiB
120 lines
3.8 KiB
/*
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This file is part of Libresonic.
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Libresonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Libresonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Libresonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2016 (C) Libresonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.libresonic.player.util;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletResponse;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Miscellaneous general utility methods.
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*
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* @author Sindre Mehus
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*/
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public final class Util {
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private static final Logger LOG = LoggerFactory.getLogger(Util.class);
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/**
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* Disallow external instantiation.
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*/
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private Util() {
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}
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public static String getDefaultMusicFolder() {
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String def = isWindows() ? "c:\\music" : "/var/music";
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return System.getProperty("libresonic.defaultMusicFolder", def);
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}
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public static String getDefaultPodcastFolder() {
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String def = isWindows() ? "c:\\music\\Podcast" : "/var/music/Podcast";
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return System.getProperty("libresonic.defaultPodcastFolder", def);
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}
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public static String getDefaultPlaylistFolder() {
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String def = isWindows() ? "c:\\playlists" : "/var/playlists";
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return System.getProperty("libresonic.defaultPlaylistFolder", def);
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}
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public static boolean isWindows() {
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return System.getProperty("os.name", "Windows").toLowerCase().startsWith("windows");
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}
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/**
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* Similar to {@link ServletResponse#setContentLength(int)}, but this
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* method supports lengths bigger than 2GB.
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* <p/>
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* See http://blogger.ziesemer.com/2008/03/suns-version-of-640k-2gb.html
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*
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* @param response The HTTP response.
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* @param length The content length.
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*/
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public static void setContentLength(HttpServletResponse response, long length) {
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if (length <= Integer.MAX_VALUE) {
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response.setContentLength((int) length);
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} else {
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response.setHeader("Content-Length", String.valueOf(length));
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}
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}
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public static <T> List<T> subList(List<T> list, long offset, long max) {
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return list.subList((int) offset, Math.min(list.size(), (int) (offset + max)));
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}
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public static List<Integer> toIntegerList(int[] values) {
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if (values == null) {
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return Collections.emptyList();
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}
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List<Integer> result = new ArrayList<Integer>(values.length);
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for (int value : values) {
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result.add(value);
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}
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return result;
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}
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public static int[] toIntArray(List<Integer> values) {
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if (values == null) {
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return new int[0];
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}
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int[] result = new int[values.size()];
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for (int i = 0; i < result.length; i++) {
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result[i] = values.get(i);
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}
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return result;
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}
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static ObjectMapper objectMapper = new ObjectMapper();
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public static String debugObject(Object object) {
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try {
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return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(object);
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} catch (JsonProcessingException e) {
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LOG.warn("Cant output debug object", e);
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return "";
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}
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}
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}
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