Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2013 Actuate Corporation.
 * 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:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/

public class Main {
    public static String getRelativeUri(String parent, String child) {
        if (!isAbsolute(child)) {
            return child;
        }
        if (!isAbsolute(parent)) {
            throw new IllegalArgumentException("Parent uri must be absolute when child uri is absolute.");
        }
        parent = parent.substring(1);
        child = child.substring(1);
        if (child.startsWith(parent)) {
            return child.substring(parent.length());
        } else {
            String[] parentPaths = parent.split("/");
            String[] currentPaths = child.split("/");
            int max = Math.max(parentPaths.length, currentPaths.length);
            int sameCount = 0;
            for (int i = 0; i < max; i++) {
                if (parentPaths[i].equals(currentPaths[i])) {
                    sameCount++;
                } else {
                    break;
                }
            }
            int upLevel = parentPaths.length - sameCount;
            StringBuffer buffer = new StringBuffer();
            for (int i = 0; i < upLevel - 1; i++) {
                buffer.append("../");
            }
            for (int i = sameCount; i < currentPaths.length; i++) {
                buffer.append(currentPaths[i]);
                if (i != currentPaths.length - 1)
                    buffer.append('/');
            }
            return buffer.toString();
        }
    }

    public static boolean isAbsolute(String uri) {
        if (uri == null) {
            return false;
        }
        return uri.startsWith("/");
    }
}