| /******************************************************************************* |
| * Copyright (c) 2010, 2015 Sonatype, Inc. |
| * 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 |
| * |
| * Contributors: |
| * Stuart McCulloch (Sonatype, Inc.) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.sisu.space; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.util.Locale; |
| |
| /** |
| * Utility methods for dealing with streams. |
| */ |
| public final class Streams |
| { |
| // ---------------------------------------------------------------------- |
| // Static initialization |
| // ---------------------------------------------------------------------- |
| |
| static |
| { |
| boolean onWindows; |
| try |
| { |
| onWindows = System.getProperty( "os.name" ).toLowerCase( Locale.US ).contains( "windows" ); |
| } |
| catch ( final RuntimeException e ) |
| { |
| onWindows = false; |
| } |
| ON_WINDOWS = onWindows; |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Constants |
| // ---------------------------------------------------------------------- |
| |
| private static final boolean ON_WINDOWS; |
| |
| // ---------------------------------------------------------------------- |
| // Constructors |
| // ---------------------------------------------------------------------- |
| |
| private Streams() |
| { |
| // static utility class, not allowed to create instances |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Utility methods |
| // ---------------------------------------------------------------------- |
| |
| /** |
| * Opens an input stream to the given URL; disables JAR caching on Windows. |
| */ |
| public static InputStream open( final URL url ) |
| throws IOException |
| { |
| if ( ON_WINDOWS ) |
| { |
| final URLConnection conn = url.openConnection(); |
| conn.setUseCaches( false ); |
| return conn.getInputStream(); |
| } |
| return url.openStream(); |
| } |
| } |