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/**
* com.sony.csl.j2me.util
*
* Description:
* Utilities for J2ME CLDC/MIDP applications
*
* Released under OSS terms (see below) as part of LocationAPITools library:
* - http://code.google.com/p/locationapitools
*
* This code was developed within the scope of the NoiseTube project at
* Sony Computer Science Laboratory (CSL) Paris, for more information please refer to:
* - http://noisetube.net
* - http://code.google.com/p/noisetube
* - http://www.csl.sony.fr
*
* Author:
* Matthias Stevens (Sony CSL Paris / Vrije Universiteit Brussel)
* Contact: [email protected]
*
* License:
* Copyright 2008-2009 Sony CSL Paris
*
* 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 com.sony.csl.j2me.util;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import java.util.Vector;
/**
* A class with useful string operations
*
* @author mstevens
*
*/
public class StringUtils
{
static public int countOccurences(String toSearch, char toFind)
{
int count = 0;
for(int i = 0; i < toSearch.length(); i++)
if(toSearch.charAt(i) == toFind)
count++;
return count;
}
static public String addTabsFront(String string, int tabs)
{
StringBuffer bff = new StringBuffer();
for(int t = 0; t < tabs; t++)
bff.append("\t");
bff.append(string);
return bff.toString();
}
static public int lastIndexOf(String toSearch, String toFind)
{
if(toSearch == null || toFind == null)
throw new NullPointerException();
//the dirty way:
String toSearchReversed = (new StringBuffer(toSearch)).reverse().toString();
String toFindReversed = (new StringBuffer(toFind)).reverse().toString();
return toSearch.length() - (toSearchReversed.indexOf(toFindReversed) + toFind.length() - 1) - 1;
}
static public String replace(String toSearch, String toFind, String replaceWith) throws IllegalArgumentException
{
toSearch = new String(toSearch); //make copy
if(toSearch != null && toFind != null && replaceWith != null)
{
int idx = toSearch.indexOf(toFind);
while(idx > -1)
{
String rest = right(toSearch, toSearch.length() - (idx + toFind.length()));
toSearch = left(toSearch, idx) + replaceWith + rest;
int idxInRest = rest.indexOf(toFind);
idx = ((idxInRest > -1) ? (idxInRest + idx + replaceWith.length()) : -1);
}
}
return toSearch;
}
static public String replaceWithEscape(String toSearch, char toFind, String replaceWith, char escape) throws IllegalArgumentException
{
toSearch = new String(toSearch); //make copy
if(toSearch != null)
{
int idx = toSearch.indexOf(toFind);
while(idx > -1)
{
String rest = right(toSearch, toSearch.length() - (idx + 1));
int shift = 0;
if(idx > 0 && toSearch.charAt(idx - 1) == escape)
toSearch = left(toSearch, idx - 1) + toFind + rest; //escape: "!$" = "$"
else
{
toSearch = left(toSearch, idx) + replaceWith + rest;
shift = replaceWith.length();
}
int idxInRest = rest.indexOf(toFind);
idx = ((idxInRest > -1) ? (idxInRest + idx + shift) : -1);
}
}
return toSearch;
}
static public String replaceWithEscape(String toSearch, char toFind, String[] replaceWith, char escape) throws IllegalArgumentException
{
toSearch = new String(toSearch); //make copy
if(toSearch != null && replaceWith != null)
{
int idx = toSearch.indexOf(toFind);
int r = 0;
while(idx > -1 && replaceWith.length > r && replaceWith[r] != null)
{
String rest = right(toSearch, toSearch.length() - (idx + 1));
int shift = 0;
if(idx > 0 && toSearch.charAt(idx - 1) == escape)
toSearch = left(toSearch, idx - 1) + toFind + rest; //escape: "!$" = "$"
else
{
toSearch = left(toSearch, idx) + replaceWith[r] + rest;
shift = replaceWith[r].length();
r++;
}
int idxInRest = rest.indexOf(toFind);
idx = ((idxInRest > -1) ? (idxInRest + idx + shift) : -1);
}
}
return toSearch;
}
static public String replace(String toSearch, char toFind, String replaceWith)
{
return replace(toSearch, new String(new char[] { toFind }), replaceWith);
}
static public String replace(String toSearch, String toFind, char replaceWith)
{
return replace(toSearch, toFind, new String(new char[] { replaceWith }));
}
static public String left(String string, int substringLength)
{
if(substringLength < 0)
throw new IllegalArgumentException("Substring length cannot be negative!");
return string.substring(0, substringLength);
}
static public String right(String string, int substringLength)
{
if(substringLength < 0)
throw new IllegalArgumentException("Substring length cannot be negative!");
return string.substring(string.length() - substringLength, string.length());
}
static public String padWithLeadingZeros(String string, int desiredLength)
{
StringBuffer bff = new StringBuffer(string);
while(bff.length() < desiredLength)
bff.insert(0, '0');
return bff.toString();
}
static public String cutOrExtendAtTail(String string, int desiredLength, char filler)
{
if(string.length() > desiredLength)
return left(string, desiredLength);
else if(string.length() < desiredLength)
{
StringBuffer bff = new StringBuffer(string);
for(int i = 0; i < desiredLength - string.length(); i++)
bff.append(filler);
return bff.toString();
}
else
return string;
}
static public String removeWhiteSpace(String string)
{
string = replace(string, '\n', "");
string = replace(string, '\r', "");
string = replace(string, '\t', "");
string = replace(string, ' ', "");
return string;
}
static public String contractToCamelCase(String string)
{
StringBuffer bff = new StringBuffer(string.length());
boolean previousWasSpace = false;
for(int i = 0; i < string.length(); i++)
{
char currentChar = string.charAt(i);
if(currentChar == ' ')
{
previousWasSpace = true;
}
else
{
if(previousWasSpace)
bff.append(Character.toUpperCase(currentChar));
else
bff.append(currentChar);
previousWasSpace = false;
}
}
return bff.toString();
}
static public String removeWhiteSpaceAndContractToCamelCase(String string)
{
string = replace(string, '\n', "");
string = replace(string, '\r', "");
string = replace(string, '\t', "");
return contractToCamelCase(string);
}
public static String[] split(String string, char separatorChar)
{
return split(string, new char[] { separatorChar });
}
public static String[] split(String string, char[] separatorChars)
{
if (string == null || string.equals(""))
return new String[] { string };
int len = string.length();
Vector separators = new Vector(separatorChars.length);
for(int s = 0; s < separatorChars.length; s++)
separators.addElement(new Character(separatorChars[s]));
Vector list = new Vector();
int i = 0;
int start = 0;
boolean match = false;
while (i < len)
{
if (separators.contains(new Character(string.charAt(i))))
{
if (match)
{
list.addElement(string.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
if (match)
{
list.addElement(string.substring(start, i));
}
String[] arr = new String[list.size()];
list.copyInto(arr);
return arr;
}
/**
* Converts a long timestamp to a string in the following format:</br>
* YYYY[dateSeparator]MM[dateSeparator]DD[dateTimeSeparator]hh[timeSeparator]mm[timeSeparator]ss
*
* @param timeStamp
* @param dateSeparator
* @param timeSeparator
* @param dateTimeSeparator
* @return A String containing the formatted timestamp
*/
static public String formatDateTime(long timeStamp, String dateSeparator, String timeSeparator, String dateTimeSeparator)
{
if(dateSeparator == null)
dateSeparator = "";
if(dateTimeSeparator == null)
dateTimeSeparator = "";
Calendar cal = Calendar.getInstance();
cal.setTimeZone(TimeZone.getDefault()); //use system time zone
cal.setTime(new Date(timeStamp)); //set the time
//Format the string:
StringBuffer bff = new StringBuffer();
// Date (YYYY[dateSeparator]MM[dateSeparator]DD)
bff.append(StringUtils.padWithLeadingZeros(String.valueOf(cal.get(Calendar.YEAR)), 4) + dateSeparator);
bff.append(StringUtils.padWithLeadingZeros(String.valueOf(cal.get(Calendar.MONTH) + 1), 2) + dateSeparator);
bff.append(StringUtils.padWithLeadingZeros(String.valueOf(cal.get(Calendar.DAY_OF_MONTH)), 2));
// [dateTimeSeparator]
bff.append(dateTimeSeparator);
// Time (hh[timeSeparator]mm[timeSeparator]ss)
bff.append(formatTime(timeStamp, timeSeparator));
//return the result
return bff.toString();
}
/**
* Converts a long timestamp to a string in the following format:</br>
* hh[timeSeparator]mm[timeSeparator]ss
*
* @param timeStamp
* @param timeSeparator
* @return A String containing the formatted timestamp
*/
static public String formatTime(long timeStamp, String timeSeparator)
{
if(timeSeparator == null)
timeSeparator = "";
Calendar cal = Calendar.getInstance();
cal.setTimeZone(TimeZone.getDefault()); //use system time zone
cal.setTime(new Date(timeStamp)); //set the time
//Format the string:
StringBuffer bff = new StringBuffer();
// Time (hh[timeSeparator]mm[timeSeparator]ss)
bff.append(StringUtils.padWithLeadingZeros(String.valueOf(cal.get(Calendar.HOUR_OF_DAY)), 2) + timeSeparator);
bff.append(StringUtils.padWithLeadingZeros(String.valueOf(cal.get(Calendar.MINUTE)), 2) + timeSeparator);
bff.append(StringUtils.padWithLeadingZeros(String.valueOf(cal.get(Calendar.SECOND)), 2));
//return the result
return bff.toString();
}
public static String formatTimeSpan(long milliseconds)
{
//Days
long days = milliseconds / 86400000;
//Hours
long hours = (milliseconds % 86400000) / 3600000;
//Minutes
long minutes = ((milliseconds % 86400000) % 3600000) / 60000;
//Seconds.millis
float seconds = (((milliseconds % 86400000) % 3600000) % 60000) / 1000;
return
"" +
((days > 0) ? (days + "d ") : "") +
((hours > 0) ? (hours + "h ") : "") +
((minutes > 0) ? (minutes + "m ") : "")
+ seconds + "s";
}
public static String StringArrayToString(String[] array, String separator)
{
if(array != null && array.length > 0)
{
StringBuffer bff = new StringBuffer(array[0]);
for(int i = 1; i < array.length; i++)
bff.append(separator + array[i]);
return bff.toString();
}
else
return "";
}
}
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