Java Relative Path Get relativePath(File parent, File child)

Description

relative Path

License

Apache License

Declaration

public static String relativePath(File parent, File child) 

Method Source Code

//package com.java2s;
/*/*from w  w w  .java 2s .c o m*/
*  Copyright Beijing 58 Information Technology Co.,Ltd.
*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you 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.io.File;
import com.google.common.base.Preconditions;

public class Main {
    public static String relativePath(File parent, File child) {
        Preconditions.checkArgument(contains(parent, child));

        String parentName = conventPath(parent);
        String childName = conventPath(child);

        String relative = childName.substring(parentName.length());

        if (relative.length() == 0)
            return "/";

        return "/" + relative.substring(0, relative.length() - 1);
    }

    public static boolean contains(File parent, File child) {
        String parentName = conventPath(parent);
        String childName = conventPath(child);
        return childName.indexOf(parentName) == 0;
    }

    public static String conventPath(File file) {
        String path = file.getAbsolutePath();
        return path.endsWith(File.separator) ? path : path + File.separator;
    }
}

Related

1. relativePath(File descendant, File root)
2. relativePath(File file, String path)
3. relativePath(File from, File to)
4. relativePath(File home, File f)
5. relativePath(File IncludedFile, File UpperDirectory)
6. relativePath(File parent, File child)
7. relativePath(File path, File relativeTo)
8. relativePath(File root, File node)
9. relativePath(File src, File dest)