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/*******************************************************************************
* Copyright (c) 2000, 2010 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.internal.resources;
import java.util.Arrays;
import org.eclipse.core.runtime.Platform;
/**
* Captures platform specific attributes relevant to the core resources plugin. This
* class is not intended to be instantiated.
*/
public abstract class OS {
private static final String INSTALLED_PLATFORM;
public static final char[] INVALID_RESOURCE_CHARACTERS;
private static final String[] INVALID_RESOURCE_BASENAMES;
private static final String[] INVALID_RESOURCE_FULLNAMES;
static {
//find out the OS being used
//setup the invalid names
INSTALLED_PLATFORM = Platform.getOS();
if (INSTALLED_PLATFORM.equals(Platform.OS_WIN32)) {
//valid names and characters taken from http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/naming_a_file.asp
INVALID_RESOURCE_CHARACTERS = new char[] {'\\', '/', ':', '*', '?', '"', '<', '>', '|'};
INVALID_RESOURCE_BASENAMES = new String[] {"aux", "com1", "com2", "com3", "com4", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
"com5", "com6", "com7", "com8", "com9", "con", "lpt1", "lpt2", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$
"lpt3", "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9", "nul", "prn"}; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$ //$NON-NLS-8$ //$NON-NLS-9$
Arrays.sort(INVALID_RESOURCE_BASENAMES);
//CLOCK$ may be used if an extension is provided
INVALID_RESOURCE_FULLNAMES = new String[] {"clock$"}; //$NON-NLS-1$
} else {
//only front slash and null char are invalid on UNIXes
//taken from http://www.faqs.org/faqs/unix-faq/faq/part2/section-2.html
INVALID_RESOURCE_CHARACTERS = new char[] {'/', '\0',};
INVALID_RESOURCE_BASENAMES = null;
INVALID_RESOURCE_FULLNAMES = null;
}
}
/**
* Returns true if the given name is a valid resource name on this operating system,
* and false otherwise.
*/
public static boolean isNameValid(String name) {
//. and .. have special meaning on all platforms
if (name.equals(".") || name.equals("..")) //$NON-NLS-1$ //$NON-NLS-2$
return false;
if (INSTALLED_PLATFORM.equals(Platform.OS_WIN32)) {
//empty names are not valid
final int length = name.length();
if (length == 0)
return false;
final char lastChar = name.charAt(length-1);
// filenames ending in dot are not valid
if (lastChar == '.')
return false;
// file names ending with whitespace are truncated (bug 118997)
if (Character.isWhitespace(lastChar))
return false;
int dot = name.indexOf('.');
//on windows, filename suffixes are not relevant to name validity
String basename = dot == -1 ? name : name.substring(0, dot);
if (Arrays.binarySearch(INVALID_RESOURCE_BASENAMES, basename.toLowerCase()) >= 0)
return false;
return Arrays.binarySearch(INVALID_RESOURCE_FULLNAMES, name.toLowerCase()) < 0;
}
return true;
}
}