Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * 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.
 */

public class Main {
    /**
     * Get a banner data in JSON format from a bundle content.
     * A bundle banner looks like below:
     * \/*!count
     *  * {
     *  *   version: "0.2.1.20170104-release",
     *  *   create: "20170207171112",
     *  *   git: "banner--772c915",
     *  *   digest: "c709b7f91867e371b24f54d6aeea232a"
     *  * }
     *  !*\/
     *
     * @param content a bundle content
     * @return
     */
    public static String getBundleBanner(String content) {
        final String commentBegin = "/*!";
        final String commentEnd = "!*/";
        final String asteriskRegex = "\\*";
        final String replacement = "";

        int offsetCountBegin = content.indexOf(commentBegin);
        if (offsetCountBegin == -1) {
            return null;
        }
        offsetCountBegin += commentBegin.length();
        int offsetCountEnd = indexLineBreak(content, offsetCountBegin);
        if (offsetCountEnd == -1) {
            return null;
        }
        String countStr = content.substring(offsetCountBegin, offsetCountEnd);
        int count = Integer.parseInt(countStr);

        String commentBody = content.substring(offsetCountEnd + 1, offsetCountEnd + 1 + count);
        int offsetBodyEnd = commentBody.lastIndexOf(commentEnd);
        if (offsetBodyEnd == -1) {
            return null;
        }
        commentBody = commentBody.substring(0, offsetBodyEnd);

        StringBuilder commentBodyBuilder = new StringBuilder();
        String[] items = splitLineBreak(commentBody);

        for (String item : items) {
            commentBodyBuilder.append(item.replaceFirst(asteriskRegex, replacement));
        }

        return commentBodyBuilder.toString();
    }

    private static int indexLineBreak(String str, int fromIndex) {
        final String lineBreakIos = "\r";
        final String lineBreakUnix = "\n";
        final String linebreakWin = "\r\n";

        int index = str.indexOf(lineBreakIos, fromIndex);
        if (index == -1) {
            index = str.indexOf(lineBreakUnix, fromIndex);
        }
        if (index == -1) {
            index = str.indexOf(linebreakWin, fromIndex);
        }

        return index;
    }

    private static String[] splitLineBreak(String str) {
        final String lineBreakIos = "\r";
        final String lineBreakUnix = "\n";
        final String linebreakWin = "\r\n";
        String[] items = str.split(lineBreakIos);

        if (items.length == 1) {
            items = str.split(lineBreakUnix);
        }
        if (items.length == 1) {
            items = str.split(linebreakWin);
        }

        return items;
    }
}