gnu.java.io

Class PlatformHelper


public class PlatformHelper
extends Object

We had many changes in File.java, URLStreamHandler.java etc. to handle path representations on different platforms (Windows/Unix-family). Finally we'd like to collect all these ad hoc codes into this utility class. --Gansha

Field Summary

static int
INITIAL_MAX_PATH
On most platforms 260 is equal or greater than a max path value, so we can set the initial buffer size of StringBuffer to half of this value to improve performance.
static boolean
isWindows
static String
pathSeparator
static char
pathSeparatorChar
static String
separator
static char
separatorChar

Method Summary

static int
beginWithRootPathPrefix(String path)
This routine checks the input param "path" whether it begins with root path prefix.
static boolean
endWithSeparator(String path)
This routine checks whether input param "path" ends with separator
static boolean
isRootDirectory(String path)
This routine checks the input param "path" whether it's root directory.
static int
lastIndexOfSeparator(String path)
This routine returns last index of separator in input param "path", and return it.
static String
removeTailSeparator(String path)
This routine removes from input param "path" the tail separator if it exists, and return the remain part.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

INITIAL_MAX_PATH

public static final int INITIAL_MAX_PATH
On most platforms 260 is equal or greater than a max path value, so we can set the initial buffer size of StringBuffer to half of this value to improve performance.
Field Value:
130

isWindows

public static final boolean isWindows

pathSeparator

public static final String pathSeparator

pathSeparatorChar

public static final char pathSeparatorChar

separator

public static final String separator

separatorChar

public static final char separatorChar

Method Details

beginWithRootPathPrefix

public static final int beginWithRootPathPrefix(String path)
This routine checks the input param "path" whether it begins with root path prefix. if not, return 0; if yes, return the len of root path prefix; --for Unix-family platform, root path begins with "/" and len is 1 --for Windows platform, root path begins with "drive:\\" and len is 3

endWithSeparator

public static final boolean endWithSeparator(String path)
This routine checks whether input param "path" ends with separator

isRootDirectory

public static final boolean isRootDirectory(String path)
This routine checks the input param "path" whether it's root directory. --for Unix-family platform, root directory is "/" --for Windows platform, root directory is "\\" or "drive:\\".

lastIndexOfSeparator

public static final int lastIndexOfSeparator(String path)
This routine returns last index of separator in input param "path", and return it.

removeTailSeparator

public static final String removeTailSeparator(String path)
This routine removes from input param "path" the tail separator if it exists, and return the remain part.

PlatformHelper.java -- Isolate OS-specific IO helper methods and variables Copyright (C) 1998, 2002, 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.