Java Path Relative nio tryMakeRelative(String rootDir, String path)

Description

Tries to make a path relative to a root directory.

License

Open Source License

Declaration

public static String tryMakeRelative(String rootDir, String path) 

Method Source Code

//package com.java2s;
/*/*from w  ww.  j  a v a2 s  . c o  m*/
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.nio.file.Path;
import java.nio.file.Paths;

public class Main {
    /** Tries to make a path relative to a root directory. Returns the fullpath otherwise. */
    public static String tryMakeRelative(String rootDir, String path) {
        return tryMakeRelative(Paths.get(rootDir), Paths.get(path));
    }

    /** Tries to make a path relative to a root directory. Returns the fullpath otherwise. */
    public static String tryMakeRelative(Path rootDir, Path path) {
        Path absRoot = rootDir.toAbsolutePath().normalize();
        Path absPath = path.toAbsolutePath().normalize();
        Path relPath = absRoot.relativize(absPath).normalize();
        if (relPath.toString().isEmpty()) {
            return ".";
        }
        return (relPath.startsWith("..") ? absPath : relPath).toString();
    }
}

Related

1. resolvePathIfRelativeTo(File referenceFile, String partialPath)
2. resolveRelative(Path p, String other)
3. resolveRelativePath(String first, String... more)
4. resolveRelativeRemotePath(Path root, Path file)
5. toFileWithAbsolutePath(String relativePath)