org.eclipse.jgit.util
Class StringUtils

java.lang.Object
  org.eclipse.jgit.util.StringUtils

public final class StringUtils
extends Object

Miscellaneous string comparison utility methods.

Method Summary

static int	compareIgnoreCase(String a, String b) Compare two strings, ignoring case.
static int	compareWithCase(String a, String b) Compare two strings, honoring case.
static boolean	equalsIgnoreCase(String a, String b) Test if two strings are equal, ignoring case.
static boolean	isEmptyOrNull(String stringValue) Test if a string is empty or null.
static String	join(Collection<String> parts, String separator) Join a collection of Strings together using the specified separator.
static String	join(Collection<String> parts, String separator, String lastSeparator) Join a collection of Strings together using the specified separator and a lastSeparator which is used for joining the second last and the last part.
static boolean	toBoolean(String stringValue) Parse a string as a standard Git boolean value.
static Boolean	toBooleanOrNull(String stringValue) Parse a string as a standard Git boolean value.
static char	toLowerCase(char c) Convert the input to lowercase.
static String	toLowerCase(String in) Convert the input string to lower case, according to the "C" locale.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

toLowerCase

public static char toLowerCase(char c)

Convert the input to lowercase.

This method does not honor the JVM locale, but instead always behaves as though it is in the US-ASCII locale. Only characters in the range 'A' through 'Z' are converted. All other characters are left as-is, even if they otherwise would have a lowercase character equivalent.

Parameters:

c - the input character.

Returns:

lowercase version of the input.

toLowerCase

public static String toLowerCase(String in)

Convert the input string to lower case, according to the "C" locale.

This method does not honor the JVM locale, but instead always behaves as though it is in the US-ASCII locale. Only characters in the range 'A' through 'Z' are converted, all other characters are left as-is, even if they otherwise would have a lowercase character equivalent.

Parameters:

in - the input string. Must not be null.

Returns:

a copy of the input string, after converting characters in the range 'A'..'Z' to 'a'..'z'.

equalsIgnoreCase

public static boolean equalsIgnoreCase(String a,
                                       String b)

Test if two strings are equal, ignoring case.

This method does not honor the JVM locale, but instead always behaves as though it is in the US-ASCII locale.

Parameters:

a - first string to compare.

b - second string to compare.

Returns:

true if a equals b

compareIgnoreCase

public static int compareIgnoreCase(String a,
                                    String b)

Compare two strings, ignoring case.

This method does not honor the JVM locale, but instead always behaves as though it is in the US-ASCII locale.

Parameters:

a - first string to compare.

b - second string to compare.

Returns:

negative, zero or positive if a sorts before, is equal to, or sorts after b.

Since:

2.0

compareWithCase

public static int compareWithCase(String a,
                                  String b)

Compare two strings, honoring case.

This method does not honor the JVM locale, but instead always behaves as though it is in the US-ASCII locale.

Parameters:

a - first string to compare.

b - second string to compare.

Returns:

negative, zero or positive if a sorts before, is equal to, or sorts after b.

Since:

2.0

toBoolean

public static boolean toBoolean(String stringValue)

Parse a string as a standard Git boolean value. See toBooleanOrNull(String).

Parameters:

stringValue - the string to parse.

Returns:

the boolean interpretation of value.

Throws:

IllegalArgumentException - if value is not recognized as one of the standard boolean names.

toBooleanOrNull

public static Boolean toBooleanOrNull(String stringValue)

Parse a string as a standard Git boolean value.

The terms yes, true, 1, on can all be used to mean true.

The terms no, false, 0, off can all be used to mean false.

Comparisons ignore case, via equalsIgnoreCase(String, String).

Parameters:

stringValue - the string to parse.

Returns:

the boolean interpretation of value or null in case the string does not represent a boolean value

join

public static String join(Collection<String> parts,
                          String separator)

Join a collection of Strings together using the specified separator.

Parameters:

parts - Strings to join

separator - used to join

Returns:

a String with all the joined parts

join

public static String join(Collection<String> parts,
                          String separator,
                          String lastSeparator)

Join a collection of Strings together using the specified separator and a lastSeparator which is used for joining the second last and the last part.

Parameters:

parts - Strings to join

separator - separator used to join all but the two last elements

lastSeparator - separator to use for joining the last two elements

Returns:

a String with all the joined parts

isEmptyOrNull

public static boolean isEmptyOrNull(String stringValue)

Test if a string is empty or null.

Parameters:

stringValue - the string to check

Returns:

true if the string is null or empty