Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    private static final Pattern LINK_PATTERN = Pattern
            .compile("((http://|https://|www\\.).+?)($|\\n|\\r|\\r\\n| )");

    /**
     * Substitutes links in the given text with valid HTML mark-up. For instance,
     * http://dhis2.org is replaced with <a href="http://dhis2.org">http://dhis2.org</a>,
     * and www.dhis2.org is replaced with <a href="http://dhis2.org">www.dhis2.org</a>.
     *
     * @param text the text to substitute links for.
     * @return the substituted text.
     */
    public static String htmlLinks(String text) {
        if (text == null || text.trim().isEmpty()) {
            return null;
        }

        Matcher matcher = LINK_PATTERN.matcher(text);

        StringBuffer buffer = new StringBuffer();

        while (matcher.find()) {
            String url = matcher.group(1);
            String suffix = matcher.group(3);

            String ref = url.startsWith("www.") ? "http://" + url : url;

            url = "<a href=\"" + ref + "\">" + url + "</a>" + suffix;

            matcher.appendReplacement(buffer, url);
        }

        return matcher.appendTail(buffer).toString();
    }

    /**
     * Null-safe method for writing the items of a string array out as a string
     * separated by the given char separator.
     *
     * @param array     the array.
     * @param separator the separator of the array items.
     * @return a string.
     */
    public static String toString(String[] array, String separator) {
        StringBuilder builder = new StringBuilder();

        if (array != null && array.length > 0) {
            for (String string : array) {
                builder.append(string).append(separator);
            }

            builder.deleteCharAt(builder.length() - 1);
        }

        return builder.toString();
    }

    /**
     * Returns the string representation of the object, or null if the object is
     * null.
     *
     * @param object the object.
     * @return the string representation.
     */
    public static String toString(Object object) {
        return object != null ? object.toString() : null;
    }

    /**
     * Invokes append tail on matcher with the given string buffer, and returns
     * the string buffer as a string.
     *
     * @param matcher the matcher.
     * @param sb      the string buffer.
     * @return a string.
     */
    public static String appendTail(Matcher matcher, StringBuffer sb) {
        matcher.appendTail(sb);
        return sb.toString();
    }
}