fr.opensagres.xdocreport.utils.StringUtils Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of fr.opensagres.xdocreport.itext.extension Show documentation
The newest version!
/**
 * Copyright (C) 2011 Angelo Zerr  and Pascal Leclercq 
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package fr.opensagres.xdocreport.utils;

/**
 * String Utilities.
 * 
 */
public class StringUtils {

	public static final String[] EMPTY_STRING_ARRAY = new String[0];

	/**
	 * Replace the oldString by the newString in the line and returns the
	 * result.
	 * 
	 * @param line
	 *            the line to replace.
	 * @param oldString
	 *            old token to replace.
	 * @param newString
	 *            new token to replace.
	 * @return
	 */
	public static final String replaceAll(String line, String oldString,
			String newString) {
		int i = 0;
		if ((i = line.indexOf(oldString, i)) >= 0) {
			char line2[] = line.toCharArray();
			char newString2[] = newString.toCharArray();
			int oLength = oldString.length();
			StringBuilder buf = new StringBuilder(line2.length);
			buf.append(line2, 0, i).append(newString2);
			i += oLength;
			int j;
			for (j = i; (i = line.indexOf(oldString, i)) > 0; j = i) {
				buf.append(line2, j, i - j).append(newString2);
				i += oLength;
			}

			buf.append(line2, j, line2.length - j);
			return buf.toString();
		} else {
			return line;
		}
	}

	/**
	 * 
	 * Checks if a String is empty ("") or null.
	 * 
	 * 
	 * 	 * StringUtils.isEmpty(null) = true StringUtils.isEmpty("") = true
	 * StringUtils.isEmpty(" ") = false StringUtils.isEmpty("bob") = false
	 * StringUtils.isEmpty(" bob ") = false
	 * 
	 * 
	 * 
	 * @param str
	 *            the String to check, may be null
	 * 
	 * @return true if the String is empty or null
	 */
	public static boolean isEmpty(String str) {
		return str == null || str.length() == 0;
	}

	/**
	 * 
	 * Checks if a String is not empty ("") and not null.
	 * 
	 * 
	 * 	 * StringUtils.isNotEmpty(null) = false
	 * StringUtils.isNotEmpty("") = false
	 * StringUtils.isNotEmpty(" ") = true
	 * StringUtils.isNotEmpty("bob") = true
	 * StringUtils.isNotEmpty(" bob ") = true
	 * 
	 * 
	 * @param str
	 *            the String to check, may be null
	 * @return true if the String is not empty and not null
	 */
	public static boolean isNotEmpty(String str) {
		return str != null && str.length() > 0;
	}

}