Convert to relative url based on base - Java Network

Java examples for Network:URL

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Description

Convert to relative url based on base

Demo Code

/*******************************************************************************
 * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) 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:                                                               *  
 *     Soyatec - initial API and implementation                                * 
 *******************************************************************************/
//package com.java2s;

import java.util.StringTokenizer;

public class Main {
    public static final String FORWARD_SLASH = "/";
    public static final String RELATIVE_PATH_SIG = "../";

    /**//from   w  w w. j  ava  2 s .  c  o  m
     * Convert to relative url based on base
     */
    public static String convertToRelative(String input, String base) {
        StringTokenizer inputTokenizer = new StringTokenizer(input,
                FORWARD_SLASH);
        StringTokenizer baseTokenizer = new StringTokenizer(base,
                FORWARD_SLASH);
        String token1 = "", token2 = "";
        //
        while (true) {
            if (!inputTokenizer.hasMoreTokens()
                    || !baseTokenizer.hasMoreTokens())
                break;
            token1 = baseTokenizer.nextToken();
            token2 = inputTokenizer.nextToken();
            if (!token1.equals(token2))
                break;
        }
        StringBuilder builder = new StringBuilder();
        while (baseTokenizer.hasMoreTokens()) {
            baseTokenizer.nextToken();
            builder.append(RELATIVE_PATH_SIG);
        }
        builder.append(token2);
        while (inputTokenizer.hasMoreTokens()) {
            builder.append(FORWARD_SLASH + inputTokenizer.nextToken());
        }
        return builder.toString();
    }
}

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