LeftTrimFunction.java

/*
 * Milyn - Copyright (C) 2006 - 2010
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License (version 2.1) as published by the Free Software
 * Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU Lesser General Public License for more details:
 * http://www.gnu.org/licenses/lgpl.txt
 */
package org.milyn.function;

/**
 * Trims all spaces at the beginning of the String. 
 *
 * @author <a href="mailto:maurice@zeijen.net">maurice@zeijen.net</a>
 */
public class LeftTrimFunction implements StringFunction {

    /**
     * Trims all spaces at the beginning of the String. 
     *
     * @param input The String
     * @return The manipulated String
     */
    public String execute(String input) {
        int i = 0;
        while (i < input.length() && Character.isWhitespace(input.charAt(i))) {
            i++;
        }
        return input.substring(i);
    }
}