Android Open Source - hubroid String Utils

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The source code is released under:

Copyright (c) 2011 Eddie Ringle. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistribution...

Java Source Code

/*
 * Copyright (c) 2012 Eddie Ringle// w  w w .  jav a2s  .  co m
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list of conditions
 * and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions
 * and the following disclaimer in the documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.idlesoft.android.apps.github.utils;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StringUtils {

    /**
     * Get time string since a specified date
     *
     * @return String of format "X U(s)", X is the quantity of U time units (e.g., "3 days")
     */
    public static String getTimeSince(final Date itemTime) {
        final Date currentTime = new Date();
        final long ms = currentTime.getTime() - itemTime.getTime();
        final long sec = ms / 1000;
        final long min = sec / 60;
        final long hour = min / 60;
        final long day = hour / 24;
        final long month = day / 30;
        final long year = day / 365;
        if (year > 0) {
            if (year == 1) {
                return year + " year";
            } else {
                return year + " years";
            }
        } else if (month > 0) {
            if (month == 1) {
                return month + " month";
            } else {
                return month + " months";
            }
        } else if (day > 0) {
            if (day == 1) {
                return day + " day";
            } else {
                return day + " days";
            }
        } else if (hour > 0) {
            if (hour == 1) {
                return hour + " hour";
            } else {
                return hour + " hours";
            }
        } else if (min > 0) {
            if (min == 1) {
                return min + " minute";
            } else {
                return min + " minutes";
            }
        } else if (sec > 0) {
            if (sec == 1) {
                return sec + " second";
            } else {
                return sec + " seconds";
            }
        } else {
            return ms + " ms";
        }
    }

    /**
     * Get the extension of a file
     *
     * @return filename's extension, not including the preceding period
     */
    public static String getExtension(final String filename) {
        try {
            return filename.substring(filename.lastIndexOf('.') + 1);
        } catch (IndexOutOfBoundsException e) {
            // Filename has no extension, oh well
            return "";
        } catch (NullPointerException e) {
            return "";
        }
    }

    /**
     * Returns a map from a HTTP query string
     *
     * @return Map of query parameters
     */
    public static Map<String, String> mapQueryString(String query) {
        String[] params = query.split("&");
        Map<String, String> map = new HashMap<String, String>();
        for (String param : params) {
            String[] split = param.split("=");
            map.put(split[0], split[1]);
        }
        return map;
    }

    public static boolean isStringEmpty(final String str) {
        return str == null || str.equals("");
    }

    public static CharSequence trimTrailingWhitespace(CharSequence text) {        /* Check for empty string */
        if (text.length() == 0) {
            return text;
        }
        while (text.charAt(text.length() - 1) == '\n') {
            text = text.subSequence(0, text.length() - 1);
        }
        return text;
    }

    public static String ghFlavoredMarkdown(String input) {
        final StringBuffer output = new StringBuffer();
        final Pattern usernamePattern = Pattern.compile("@([A-Za-z0-9]?[A-Za-z0-9-]+)");
        final Matcher usernameMatcher = usernamePattern.matcher(input);

    /* Loop through @username matches */
        while (usernameMatcher.find()) {            /* Grab the username from the match (without the '@') */
            final String username = usernameMatcher.group(1);
      /* Create a URL to the user's profile */
            final String r = "<a href=\"https://github.com/" + username + "\">@" + username
                    + "</a>";
      /* Append the replacement */
            usernameMatcher.appendReplacement(output, r);
        }
    /* Append the rest of the non-matching text */
        usernameMatcher.appendTail(output);

        return output.toString();
    }
}

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