fr.opensagres.xdocreport.utils.StringUtils Maven / Gradle / Ivy
/**
* Copyright (C) 2011-2012 The XDocReport Team
*
* 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;
}
}