wicket-examples/src/java/wicket/examples/displaytag/utils/RandomSampleUtil.java

/*
 * $Id$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 * Licensed 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.
 */
package wicket.examples.displaytag.utils;

import java.util.Calendar;
import java.util.Date;
import java.util.Random;

/**
 * Utility class used to get random word and sentences used in examples.
 *
 * @author fgiust (wicket.examples.wicket.examples.displaytag)
 */
public final class RandomSampleUtil
{

    /**
     * list of words.
     */
    private static String[] words =
        new String[] {
            "Lorem",
            "ipsum",
            "dolor",
            "sit",
            "amet",
            "consetetur",
            "sadipscing",
            "elitr",
            "sed",
            "diam",
            "nonumy",
            "eirmod",
            "tempor",
            "invidunt",
            "ut",
            "labore",
            "et",
            "dolore",
            "magna",
            "aliquyam",
            "erat",
            "sed",
            "diam",
            "voluptua",
            "At",
            "vero",
            "eos",
            "et",
            "accusam",
            "et",
            "justo",
            "duo",
            "dolores",
            "et",
            "ea",
            "rebum",
            "Stet",
            "clita",
            "kasd",
            "gubergren",
            "no",
            "sea",
            "takimata",
            "sanctus",
            "est" };

    /**
     * random number producer.
     */
    private static Random random = new Random();

    /**
     * utility class, don't instantiate.
     */
    private RandomSampleUtil()
    {
        super();
    }
    
    /**
     * returns a random word.
     * @return random word
     */
    public static String getRandomWord()
    {
        return words[random.nextInt(words.length)];
    }

    /**
     * returns a random sentence.
     * @param wordNumber number of word in the sentence
     * @return random sentence made of <code>wordNumber</code> words
     */
    public static String getRandomSentence(int wordNumber)
    {
        StringBuffer buffer = new StringBuffer(wordNumber * 12);

        int j = 0;
        while (j < wordNumber)
        {
            buffer.append(getRandomWord());
            buffer.append(" ");
            j++;
        }
        return buffer.toString();
    }

    /**
     * returns a random email.
     * @return random email
     */
    public static String getRandomEmail()
    {
        return getRandomWord() + "@" + getRandomWord() + ".com";
    }

    /**
     * Returns a random date.
     * 
     * @return random date
     */
    public static Date getRandomDate()
    {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DATE, 365 - random.nextInt(730));
        return calendar.getTime();
    }
    
    /**
     * Returns a random truth value.
     * 
     * @return Random boolean
     */
    public static boolean getRandomBoolean()
    {
        return random.nextBoolean();
    }
}