Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 ===========================================================================
 Copyright (c) 2010 BrickRed Technologies Limited
    
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sub-license, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
    
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
    
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ===========================================================================
    
 */

public class Main {
    /**
     * It decodes the given string
     * 
     * @param encodedURI
     * @return decoded string
     */
    public static String decodeURIComponent(final String encodedURI) {
        char actualChar;

        StringBuffer buffer = new StringBuffer();

        int bytePattern, sumb = 0;

        for (int i = 0, more = -1; i < encodedURI.length(); i++) {
            actualChar = encodedURI.charAt(i);

            switch (actualChar) {
            case '%': {
                actualChar = encodedURI.charAt(++i);
                int hb = (Character.isDigit(actualChar) ? actualChar - '0'
                        : 10 + Character.toLowerCase(actualChar) - 'a') & 0xF;
                actualChar = encodedURI.charAt(++i);
                int lb = (Character.isDigit(actualChar) ? actualChar - '0'
                        : 10 + Character.toLowerCase(actualChar) - 'a') & 0xF;
                bytePattern = (hb << 4) | lb;
                break;
            }
            case '+': {
                bytePattern = ' ';
                break;
            }
            default: {
                bytePattern = actualChar;
            }
            }

            if ((bytePattern & 0xc0) == 0x80) { // 10xxxxxx
                sumb = (sumb << 6) | (bytePattern & 0x3f);
                if (--more == 0) {
                    buffer.append((char) sumb);
                }
            } else if ((bytePattern & 0x80) == 0x00) { // 0xxxxxxx
                buffer.append((char) bytePattern);
            } else if ((bytePattern & 0xe0) == 0xc0) { // 110xxxxx
                sumb = bytePattern & 0x1f;
                more = 1;
            } else if ((bytePattern & 0xf0) == 0xe0) { // 1110xxxx
                sumb = bytePattern & 0x0f;
                more = 2;
            } else if ((bytePattern & 0xf8) == 0xf0) { // 11110xxx
                sumb = bytePattern & 0x07;
                more = 3;
            } else if ((bytePattern & 0xfc) == 0xf8) { // 111110xx
                sumb = bytePattern & 0x03;
                more = 4;
            } else { // 1111110x
                sumb = bytePattern & 0x01;
                more = 5;
            }
        }
        return buffer.toString();
    }
}