/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
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*
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* and therefore, elected the GPL Version 2 license, then the option applies
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*/
package com.sun.enterprise.config.backup.util;
/* WBN Valentine's Day, 2000 -- place for handy String utils.
*/
import java.util.*;
public class StringUtils
{
private StringUtils()
{
}
////////////////////////////////////////////////////////////////////////////
/**
* return the length of the String - or 0 if it's null
*/
public static int safeLength(String s)
{
if(s == null)
return 0;
return s.length();
}
////////////////////////////////////////////////////////////////////////////
public static boolean ok(String s)
{
return s != null && s.length() > 0;
}
////////////////////////////////////////////////////////////////////////////
public static int maxWidth(Vector v)
{
// find longest String in a vector of Strings...
int max = 0;
if(v == null || v.size() <= 0 || !(v.elementAt(0) instanceof String))
return 0;
for(int i = v.size() - 1; i >= 0; i--)
{
int len = ((String)v.elementAt(i)).length();
if(len > max)
max = len;
}
return max;
}
////////////////////////////////////////////////////////////////////////////
public static boolean isHex(String s)
{
// is this the String representation of a valid hex number?
// "5", "d", "D", "F454ecbb" all return true...
// p.s. there MUST be a better and faster way of doing this...
final int slen = s.length();
for(int i = 0; i < slen; i++)
if(isHex(s.charAt(i)) == false)
return false;
return true;
}
////////////////////////////////////////////////////////////////////////////
public static boolean isHex(char c)
{
// is this the char a valid hex digit?
String hex = "0123456789abcdefABCDEF";
int hexlen = hex.length();
for(int i = 0; i < hexlen; i++)
if(hex.charAt(i) == c)
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////
public static String getPenultimateDirName(String s)
{
// e.g. input: "a/b/c/d/foobar.txt" output: "d"
if(s == null || s.length() <= 0)
return s;
// must be a plain file name -- return empty string...
if( (s.indexOf('/') < 0) && (s.indexOf('\\') < 0) )
return "";
s = s.replace('\\', '/'); // make life easier for the next steps...
int index = s.lastIndexOf('/');
if(index < 0)
return ""; // can't happen!!!
s = s.substring(0, index); // this will truncate the last '/'
index = s.lastIndexOf('/');
if(index >= 0)
s = s.substring(index + 1);
return s;
}
////////////////////////////////////////////////////////////////////////////
public static String toShortClassName(String className)
{
int index = className.lastIndexOf('.');
if(index >= 0 && index < className.length() - 1)
return className.substring(index + 1);
return className;
}
////////////////////////////////////////////////////////////////////////////
public static String padRight(String s, int len)
{
if(s == null || s.length() >= len)
return s;
for(int i = len - s.length(); i > 0; --i)
s += ' ';
return s;
}
////////////////////////////////////////////////////////////////////////////
public static String padLeft(String s, int len)
{
String ss = "";
if(s == null || s.length() >= len)
return s;
for(int i = len - s.length(); i > 0; --i)
ss += ' ';
return ss + s;
}
////////////////////////////////////////////////////////////////////////////
public static String[] toLines(String s)
{
if(s == null)
return new String[0];
Vector v = new Vector();
int start = 0;
int end = 0;
for(end = s.indexOf('\n', start); end >= 0 && start < s.length(); end = s.indexOf('\n', start))
{
v.addElement(s.substring(start, end)); // does NOT include the '\n'
start = end + 1;
}
if(start < s.length())
v.addElement(s.substring(start));
String[] ss = new String[v.size()];
v.copyInto(ss);
return ss;
}
////////////////////////////////////////////////////////////////////////////
public static void prepend(String[] ss, String what)
{
for(int i = 0; i < ss.length; i++)
ss[i] = what + ss[i];
}
////////////////////////////////////////////////////////////////////////////
public static String UpperCaseFirstLetter(String s)
{
if(s == null || s.length() <= 0)
return s;
return s.substring(0, 1).toUpperCase() + s.substring(1);
}
////////////////////////////////////////////////////////////////////////////
public static String replace(String s, String token, String replace)
{
if(s == null || s.length() <= 0 || token == null || token.length() <= 0)
return s;
int index = s.indexOf(token);
if(index < 0)
return s;
int tokenLength = token.length();
String ret = s.substring(0, index);
ret += replace;
ret += s.substring(index + tokenLength);
return ret;
}
////////////////////////////////////////////////////////////////////////////
public static String toString(Properties props)
{
if(props == null || props.size() <= 0)
return "No entries";
Set entries = props.entrySet();
StringBuffer sb = new StringBuffer();
// first -- to line things up nicely -- find the longest key...
int keyWidth = 0;
for(Iterator it = entries.iterator(); it.hasNext(); )
{
Map.Entry me = (Map.Entry)it.next();
String key = (String)me.getKey();
int len = key.length();
if(len > keyWidth)
keyWidth = len;
}
++keyWidth;
// now make the strings...
for(Iterator it = entries.iterator(); it.hasNext(); )
{
Map.Entry me = (Map.Entry)it.next();
String key = (String)me.getKey();
String val = (String)me.getValue();
sb.append(padRight(key, keyWidth));
sb.append("= ");
sb.append(val);
sb.append('\n');
}
return sb.toString();
}
// Test Code...
public static void main(String[] args)
{
final int len = args.length;
if((len == 1) && args[0].equalsIgnoreCase("toLine"))
testToLine();
else if((len > 1) && args[0].equalsIgnoreCase("isHex"))
testHex(args);
else
usage();
}
////////////////////////////////////////////////////////////////////////////
private static void usage()
{
System.out.println("StringUtils -- main() for testing usage:\n");
System.out.println("java netscape.blizzard.util.StringUtils toLine");
System.out.println("java netscape.blizzard.util.StringUtils isHex number1 number2 ...");
}
////////////////////////////////////////////////////////////////////////////
private static void testHex(String[] args)
{
System.out.println("StringUtils -- Testing Hex");
for(int i = 1; i < args.length; i++)
System.out.println(padRight(args[i], 16) + " " + (isHex(args[i]) ? "yesHex" : "notHex"));
}
////////////////////////////////////////////////////////////////////////////
private static void testToLine()
{
System.out.println("StringUtils -- Testing toLine()");
String[] ss =
{
null,
"",
"abc\ndef\n",
"abc\ndef",
"abc",
"abc\n",
"abc\n\n",
"q",
"\n\nk\n\nz\n\n",
"sd.adj;ld"
};
for(int k = 0; k < ss.length; k++)
{
String[] s2 = StringUtils.toLines(ss[k]);
System.out.println("String #" + k + ", Number of Lines: " + s2.length);
for(int i = 0; i < s2.length; i++)
System.out.println(s2[i]);
}
}
public static void testUpperCase()
{
String[] test = new String[] { "xyz", "HITHERE", "123aa", "aSSS", "yothere" };//NOI18N
for(int i = 0; i < test.length; i++)
{
System.out.println(test[i] + " >>> " + UpperCaseFirstLetter(test[i]));//NOI18N
}
}
/**
A utility to get the Operating System specific path from given array
of Strings.
@param strings an array of Strings participating in the path.
@param addTrailing a boolean that determines whether the returned
String should have a trailing File Separator character. None of
the strings may be null or empty String. An exception is thrown.
@return a String that concatenates these Strings and gets a path. Returns
a null if the array is null or contains no elements.
@throws IllegalArgumentException if any of the arguments is null or is
an empty string.
*/
public static String makeFilePath(String[] strings, boolean addTrailing)
{
StringBuffer path = null;
String separator = System.getProperty("file.separator");
if (strings != null)
{
path = new StringBuffer();
for (int i = 0 ; i < strings.length ; i++)
{
String element = strings[i];
if (element == null || element.length () == 0)
{
throw new IllegalArgumentException();
}
path.append(element);
if (i < strings.length - 1)
{
path.append(separator);
}
}
if (addTrailing)
{
path.append(separator);
}
}
return ( path.toString() );
}
/**
* Parses a string containing substrings separated from
* each other by the standard separator characters and returns
* a list of strings.
*
* Splits the string <code>line</code> into individual string elements
* separated by the field separators, and returns these individual
* strings as a list of strings. The individual string elements are
* trimmed of leading and trailing whitespace. Only non-empty strings
* are returned in the list.
*
* @param line The string to split
* @return Returns the list containing the individual strings that
* the input string was split into.
*/
public static List parseStringList(String line)
{
return parseStringList(line, null);
}
/**
* Parses a string containing substrings separated from
* each other by the specified set of separator characters and returns
* a list of strings.
*
* Splits the string <code>line</code> into individual string elements
* separated by the field separators specified in <code>sep</code>,
* and returns these individual strings as a list of strings. The
* individual string elements are trimmed of leading and trailing
* whitespace. Only non-empty strings are returned in the list.
*
* @param line The string to split
* @param sep The list of separators to use for determining where the
* string should be split. If null, then the standard
* separators (see StringTokenizer javadocs) are used.
* @return Returns the list containing the individual strings that
* the input string was split into.
*/
public static List parseStringList(String line, String sep)
{
if (line == null)
return null;
StringTokenizer st;
if (sep == null)
st = new StringTokenizer(line);
else
st = new StringTokenizer(line, sep);
String token;
List tokens = new Vector();
while (st.hasMoreTokens())
{
token = st.nextToken().trim();
if (token.length() > 0)
tokens.add(token);
}
return tokens;
}
}
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