/*******************************************************************************
* Copyright (c) 2012 Original authors and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Original authors and others - initial API and implementation
******************************************************************************/
package org.eclipse.nebula.widgets.nattable.dataset.valuegenerator;
import java.util.Random;
import org.eclipse.nebula.widgets.nattable.dataset.generator.IValueGenerator;
public class SentenceValueGenerator implements IValueGenerator {
private char[] uppercase = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
'U', 'V', 'W', 'X', 'Y', 'Z' };
private char[] lowercase = new char[] { 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
'u', 'v', 'w', 'x', 'y', 'z' };
private char[] midPunctuation = new char[] { ' ', ',', '-' };
private char[] endPunctuation = new char[] { '.', '!' };
private int minLength;
private int maxLength;
public SentenceValueGenerator() {
this(5, 20);
}
public SentenceValueGenerator(int minLength, int maxLength) {
this.minLength = minLength;
this.maxLength = maxLength;
}
public Object newValue(Random random) {
if (random.nextBoolean()) {
return "";
}
StringBuilder strBuilder = new StringBuilder();
int remainingLength = minLength + random.nextInt(maxLength - minLength);
boolean endsWithPunctuation = random.nextBoolean();
if (endsWithPunctuation) {
remainingLength--;
}
String word = getWord(remainingLength, random);
strBuilder.append(word);
remainingLength -= word.length();
while (remainingLength > 1) {
strBuilder.append(getChar(midPunctuation, random));
remainingLength--;
word = getWord(remainingLength, random);
strBuilder.append(word);
remainingLength -= word.length();
}
if (endsWithPunctuation) {
strBuilder.append(getChar(endPunctuation, random));
}
return strBuilder.toString();
}
private String getWord(int maxWordLength, Random random) {
StringBuilder wordBuilder = new StringBuilder();
int wordLength = random.nextInt(maxWordLength);
for (int i = 0; i < wordLength; i++) {
wordBuilder.append(getChar(random.nextBoolean() ? uppercase
: lowercase, random));
}
return wordBuilder.toString();
}
private char getChar(char[] chars, Random random) {
return chars[random.nextInt(chars.length)];
}
}