/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.jdo.api.persistence.enhancer.util;
import java.util.StringTokenizer;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import java.util.Vector;
import java.io.File;
import java.io.IOException;
import java.io.FilenameFilter;
/**
* FilePath provides general file path manipulation utilities.
*/
public class FilePath {
private static String cwdAbsolute;
/**
* Return the absolute path for a file. All directory separators are
* converted to be File.separatorChar
*/
public static String getAbsolutePath(File file) {
/* VJ++ blows it here and doesn't use File.separatorChar when making
a relative path absolute. It uses '/' instead. */
String basicAbsolute = file.getAbsolutePath();
if (file.separatorChar == '/')
return basicAbsolute.replace('\\', '/');
else
return basicAbsolute.replace('/', '\\');
}
private static String getCwdAbsolute() {
if (cwdAbsolute == null)
cwdAbsolute = getAbsolutePath(new File("."));//NOI18N
return cwdAbsolute;
}
/**
* Attempt to produce a canonical path name for the specified file
*/
public static String canonicalize(File file) {
try {
return file.getCanonicalPath();
} catch (IOException ioe) {
/* JDK 1.1.4 gets an IOException if you pass it a UNC path name. */
}
/* Do it the hard way if getCanonicalPath fails.
* This is far from perfect.
* - It doesn't know about multiple mount points
* - Doesn't deal with case differences.
*/
String absolutePath = getAbsolutePath(file);
Vector components = new Vector();
StringTokenizer parser =
new StringTokenizer(absolutePath, File.separator, true);
while (parser.hasMoreElements())
components.addElement(parser.nextToken());
boolean editted = true;
while (editted) {
editted = false;
for (int i=1; i<components.size() && !editted; i++) {
String s = (String)components.elementAt(i);
if (s.equals(".")) {//NOI18N
components.removeElementAt(i);
components.removeElementAt(i-1);
editted = true;
} else if (s.equals("..")) {//NOI18N
components.removeElementAt(i);
components.removeElementAt(i-1);
if (i > 2) {
if (!((String)components.elementAt(i-2)).equals(File.separator) &&
((String)components.elementAt(i-3)).equals(File.separator)) {
components.removeElementAt(i-2);
components.removeElementAt(i-3);
}
}
editted = true;
}
}
}
/* Special case for Windows */
String cwd = getCwdAbsolute();
if (cwd.length() > 2 &&
cwd.charAt(0) != File.separatorChar &&
cwd.charAt(1) == ':') {
/* probably a drive letter */
if (((String)components.elementAt(0)).equals(File.separator) &&
(components.size() == 1 ||
!((String)components.elementAt(1)).equals(File.separator))) {
String drive = cwd.substring(0,2);
components.insertElementAt(drive, 0);
}
}
/* Remove a trailing File.separatorChar */
if (components.size() > 0 &&
((String)components.elementAt(components.size()-1)).equals(
File.separator))
components.removeElementAt(components.size()-1);
StringBuffer result = new StringBuffer();
for (int j=0; j<components.size(); j++)
result.append((String)components.elementAt(j));
return result.toString();
}
/**
* Compare two "canonical" file names for equivalence
*/
public static boolean canonicalNamesEqual(String f1, String f2) {
boolean equal;
String cwd = getCwdAbsolute();
if (cwd.length() > 2 &&
cwd.charAt(0) != File.separatorChar &&
cwd.charAt(1) == ':') {
equal = f1.equalsIgnoreCase(f2);
}
else
equal = f1.equals(f2);
return equal;
}
}
|