Hello,
I wrote a personal class "StringHelper" using the StringUtils class and
containing some classic routines.
I think those could be added to the StringUtils class.
There are some of these methods (JavaDoc is actually in French, so I
didn't include it here) :
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/**
* StringHelper.abbreviate(null, *, *, *) = null
* StringHelper.abbreviate("", 10, 2, 3) = ""
* StringHelper.abbreviate("0123456789ABCDEF", 16, 3, 2) =
"0123456789ABCDEF"
* StringHelper.abbreviate("0123456789ABCDEF", 10, 3, 2) = "01234...EF"
* StringHelper.abbreviate("Lorem ipsum dolor sit amet", 23, 6, 5) =
"Lorem ipsum dol... amet"
* StringHelper.abbreviate("012345", 5, 0, 2) => {@link
IllegalArgumentException}
*/
public static String abbreviate(String pString, int pMaxLength, int
pPrefixLength, int pSuffixLength);
/**
* StringHelper.abbreviate(null, null, null, *) = null
* StringHelper.abbreviate("", null, null, *) = ""
* StringHelper.abbreviate(null, "", null, *) = ""
* StringHelper.abbreviate(null, null, "", *) = ""
* StringHelper.abbreviate("", "", "", 10) = ""
* StringHelper.abbreviate("a", "b", "c", 10) = "abc"
* StringHelper.abbreviate("012", "3456789ABCD", "EF", 16) =
"0123456789ABCDEF"
* StringHelper.abbreviate("012", "3456789ABCD", "EF", 10) =
"01234...EF"
* StringHelper.abbreviate("Lorem ", "ipsum dolor sit", " amet", 23)
= "Lorem ipsum dol... amet"
* StringHelper.abbreviate("", "0123", "45", 5) => {@link
IllegalArgumentException}
*/
public static String abbreviate(String pPrefix, String pString, String
pSuffix, int pMaxLength);
/**
* StringHelper.leftPadLeftCut(null, *, *, false) = null
* StringHelper.leftPadLeftCut(null, 3, 'z', true) = "zzz"
* StringHelper.leftPadLeftCut("", 3, 'z', *) = "zzz"
* StringHelper.leftPadLeftCut("bat", 3, 'z', *) = "bat"
* StringHelper.leftPadLeftCut("bat", 5, 'z', *) = "zzbat"
* StringHelper.leftPadLeftCut("bat", 1, 'z', *) = "t"
* StringHelper.leftPadLeftCut("bat", -1, 'z', *) = ""
*/
public static String leftPadLeftCut(String pString, int pFixedSize, char
pPadChar, boolean pNullAsEmpty);
/**
* StringHelper.leftPadRightCut(null, *, *, false) = null
* StringHelper.leftPadRightCut(null, 3, 'z', true) = "zzz"
* StringHelper.leftPadRightCut("", 3, 'z', *) = "zzz"
* StringHelper.leftPadRightCut("bat", 3, 'z', *) = "bat"
* StringHelper.leftPadRightCut("bat", 5, 'z', *) = "zzbat"
* StringHelper.leftPadRightCut("bat", 1, 'z', *) = "b"
* StringHelper.leftPadRightCut("bat", -1, 'z', *) = ""
*/
public static String leftPadRightCut(String pString, int pFixedSize,
char pPadChar, boolean pNullAsEmpty);
/**
* StringHelper.rightPadRightCut(null, *, *, false) = null
* StringHelper.rightPadRightCut(null, 3, 'z', true) = "zzz"
* StringHelper.rightPadRightCut("", 3, 'z', *) = "zzz"
* StringHelper.rightPadRightCut("bat", 3, 'z', *) = "bat"
* StringHelper.rightPadRightCut("bat", 5, 'z', *) = "batzz"
* StringHelper.rightPadRightCut("bat", 1, 'z', *) = "b"
* StringHelper.rightPadRightCut("bat", -1, 'z', *) = ""
*/
public static String rightPadRightCut(String pString, int pFixedSize,
char pPadChar, boolean pNullAsEmpty);
/**
* StringHelper.rightPadLeftCut(null, *, *, false) = null
* StringHelper.rightPadLeftCut(null, 3, 'z', true) = "zzz"
* StringHelper.rightPadLeftCut("", 3, 'z', *) = "zzz"
* StringHelper.rightPadLeftCut("bat", 3, 'z', *) = "bat"
* StringHelper.rightPadLeftCut("bat", 5, 'z', *) = "batzz"
* StringHelper.rightPadLeftCut("bat", 1, 'z', *) = "t"
* StringHelper.rightPadLeftCut("bat", -1, 'z', *) = ""
*/
public static String rightPadLeftCut(String pString, int pFixedSize,
char pPadChar, boolean pNullAsEmpty);
/**
* StringHelper.rotate(null, *) = null
* StringHelper.rotate("", *) = ""
* StringHelper.rotate("ABCDEFG", 0) = "ABCDEF"
* StringHelper.rotate("ABCDEFG", 2) = "FGABCDE"
* StringHelper.rotate("ABCDEFG", -2) = "CDEFGAB"
* StringHelper.rotate("ABCDEFG", 7) = "ABCDEFG"
* StringHelper.rotate("ABCDEFG", -7) = "ABCDEFG"
* StringHelper.rotate("ABCDEFG", 9) = "FGABCDE"
* StringHelper.rotate("ABCDEFG", -9) = "CDEFGAB"
*/
public static String rotate(String pString, int pCount);
/**
* StringHelper.replaceAll(null, *, *) = null
* StringHelper.replaceAll(*, null, *) => {@link NullPointerException}
* StringHelper.replaceAll(*, *, null) => {@link NullPointerException}
* StringHelper.replaceAll("", "", "abc") = "abc"
* StringHelper.replaceAll("", ".*", "abc") = "abc"
* StringHelper.replaceAll("", ".+", "abc") = ""
* StringHelper.replaceAll("ABCabc123", "[a-z]", "_") = "ABC___123"
* StringHelper.replaceAll("ABCabc123", "[^A-Z0-9]+", "_") = "ABC_123"
* StringHelper.replaceAll("ABCabc123", "[^A-Z0-9]+", "") = "ABC123"
* StringHelper.replaceAll("Lorem ipsum dolor sit", "(
+)([a-z]+)", "_$2") = "Lorem_ipsum_dolor_sit"
*
* @see String#replaceAll(String, String)
* @see java.util.regex.Pattern
*/
public static String replaceAll(String pString, String pRegex, String
pReplacement);
/**
* StringHelper.replaceFirst(null, *, *) = null
* StringHelper.replaceFirst(*, null, *) => {@link
NullPointerException}
* StringHelper.replaceFirst(*, *, null) => {@link
NullPointerException}
* StringHelper.replaceFirst("", "", "abc") = "abc"
* StringHelper.replaceFirst("", ".*", "abc") = "abc"
* StringHelper.replaceFirst("", ".+", "abc") = ""
* StringHelper.replaceFirst("ABCabc123", "[a-z]", "_") = "ABC_bc123"
* StringHelper.replaceFirst("ABCabc123abc", "[^A-Z0-9]+", "_") =
"ABC_123abc"
* StringHelper.replaceFirst("ABCabc123abc", "[^A-Z0-9]+", "") =
"ABC123abc"
* StringHelper.replaceFirst("Lorem ipsum dolor sit", "(
+)([a-z]+)", "_$2") = "Lorem_ipsum dolor sit"
*
* @see String#replaceFirst(String, String)
* @see java.util.regex.Pattern
*/
public static String replaceFirst(String pString, String pRegex, String
pReplacement);
public static int compare(String pString1, String pString2);
public static int compareIgnoreCase(String pString1, String pString2);
/**
* @param pAlgorithm : MD5, SHA-1,... see {@link MessageDigest}
* @throws NoSuchAlgorithmException -
*/
public static String hash(String pString, String pAlgorithm) throws
NoSuchAlgorithmException;
public static byte[] hashBytes(String pString, String pAlgorithm) throws
NoSuchAlgorithmException;
/**
* Convert a bytes array to an hexadecimal String represetation (big
endian)
*/
public static String toHexString(byte[] pBytes);
/**
* @return Integer or {@code null} if pString is empty
*/
public static Integer toIntegerEmpty(String pString);
/**
* StringHelper.splitByLength(null, *) = null
* StringHelper.splitByLength("abc") = []
* StringHelper.splitByLength("", 2, 4, 1) = [null, null, null]
* StringHelper.splitByLength("abcdefg", 2, 4, 1) = ["ab", "cdef", "g"]
* StringHelper.splitByLength("abcdefghij", 2, 4, 1) = ["ab",
"cdef", "g"]
* StringHelper.splitByLength("abcdef", 2, 4, 1) = ["ab", "cdef", null]
* StringHelper.splitByLength("abcdef ", 2, 4, 1) = ["ab", "cdef", " "]
* StringHelper.splitByLength(" abcdefg", 2, 4, 1) = [" a", "bcde",
"f"]
* StringHelper.splitByLength("abcdefg", 2, 4, 0, 1) = ["ab",
"cdef", null, "g"]
*
* @return String[] or {@code null} if <code>pString == null</code>
*/
public static String[] splitByLength(String pString, int ... pColLengths);
/**
* Return {@link Matcher} from <code>pRegex.matcher(pString)</code>
* @return {@link Matcher} ou <code>null</code>
*/
public static Matcher matcher(CharSequence pString, Pattern pRegex);
/**
* Return {@link Matcher} from
<code>Pattern.compile(pRegex).matcher(pString)</code>
* @return {@link Matcher} ou <code>null</code>
*/
public static Matcher matcher(CharSequence pString, String pRegex);
public static boolean matches(CharSequence pString, Pattern pRegex);
public static boolean matches(CharSequence pString, String pRegex);
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I will rename parameters and add final qualifier to respect your coding
practices.
I will translate the JavaDoc and comments in English.
If you are interested, I can add those to StringUtils (and associated
test cases) in my github repository.
It's my first contribution, so how would you like it to be done ?
1- make a JIRA ticket by logical group of methods and related git
pull request
2- make a single detailed JIRA ticket with all methods and a single
git pull request with one commit by logical group of methods
Best regards,
--
Loic Guibert
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