Package org.aksw.commons.util.string

Class StringUtils

java.lang.Object

org.aksw.commons.util.string.StringUtils

public class StringUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
StringUtils()

Method Summary

Modifier and Type	Method	Description
static String	bytesToHexString(byte[] bytes)
static <T> T	coalesce(T... args)	Returns first non-null argument
static String	commonPrefix(String sa, String sb, boolean skipLast)	Returns the common prefix of the given strings
static String	cropString(String str, int nMax, int nTolerance)	Cuts a string after nMax bytes - unless the remaining bytes are less than tolerance.
static int	findCharPos(String str, int line, int col)	Convert line and column index to the char position line and column indexes are 1-based.
static <T> Map<String,T>	getAllPrefixedEntries(String prefix, boolean inclusive, NavigableMap<String,T> prefixMap)
static <T> Map<String,T>	getAllPrefixedEntries(String prefix, boolean inclusive, SortedMap<String,T> prefixMap)
static <T> Map<String,T>	getAllPrefixes(String lookup, boolean inclusive, NavigableMap<String,T> prefixMap)
static <T> NavigableSet<String>	getAllPrefixes(String lookup, boolean inclusive, NavigableSet<String> prefixMap)
static <T> Map<String,T>	getAllPrefixes(String lookup, boolean inclusive, SortedMap<String,T> prefixMap)
static int	getEolCharCount(String str, int charPos)	Return the number of end-of-line characters at the current position - if any.
static <T> Map.Entry<String,T>	getMatchBySuffix(String str, Map<String,T> map)
static <T> String	itemPerLine(Iterable<T> iterable)
static <T> String	itemPerLine(T[] array)
static String	lcFirst(String str)
static <T> Map.Entry<String,T>	longestPrefixLookup(String lookup, boolean inclusive, NavigableMap<String,T> prefixMap)	Looks up an element in the given map that is the longest prefix of the given lookup key.
static <T> String	longestPrefixLookup(String lookup, boolean inclusive, NavigableSet<String> prefixes)
static <T> Map.Entry<String,T>	longestPrefixLookup(String lookup, boolean inclusive, SortedMap<String,T> prefixMap)
static <T> Map.Entry<String,T>	longestPrefixLookup(String lookup, NavigableMap<String,T> prefixMap)
static <T> String	longestPrefixLookup(String lookup, NavigableSet<String> prefixes)
static String	md5Hash(byte[] bytes)	calculate md5 hash of the string
static String	md5Hash(String string)
static <V> Map.Entry<String,V>	shortestMatchLookup(String prefix, boolean inclusive, NavigableMap<String,V> items)
static String	shortestMatchLookup(String prefix, boolean inclusive, NavigableSet<String> items)
static String	strip(String str, String... chars)	Removes prefixes that are also suffixes from a given string e.g.
static String	toCamelCase(String s, boolean upper)
static String	toLowerCamelCase(String s)
static String	toUpperCamelCase(String s)
static String	ucFirst(String str)
static String	urlDecode(String str)
static String	urlEncode(String str)	Helper functions to get rid of that exception.

Methods inherited from class java.lang.Object

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

Constructor Detail

StringUtils

public StringUtils()

Method Detail

getEolCharCount

public static int getEolCharCount(String str,
                                  int charPos)

Return the number of end-of-line characters at the current position - if any. For non-eol positions the result is 0

Parameters:

str -

charPos -

Returns:

findCharPos

public static int findCharPos(String str,
                              int line,
                              int col)

Convert line and column index to the char position line and column indexes are 1-based. Using 0 for either argument yields -1

Parameters:

str -

line -

col - the column

Returns:

the char pos or -1 if there was none w.r.t. line and col

itemPerLine

public static <T> String itemPerLine(T[] array)

itemPerLine

public static <T> String itemPerLine(Iterable<T> iterable)

strip

public static String strip(String str,
                           String... chars)

Removes prefixes that are also suffixes from a given string e.g. strip('Hi', ') -> Hi

Parameters:

str -

chars -

Returns:

coalesce

public static <T> T coalesce(T... args)

Returns first non-null argument

Type Parameters:

T -

Parameters:

args -

Returns:

ucFirst

public static String ucFirst(String str)

lcFirst

public static String lcFirst(String str)

toLowerCamelCase

public static String toLowerCamelCase(String s)

toUpperCamelCase

public static String toUpperCamelCase(String s)

toCamelCase

public static String toCamelCase(String s,
                                 boolean upper)

cropString

public static String cropString(String str,
                                int nMax,
                                int nTolerance)

Cuts a string after nMax bytes - unless the remaining bytes are less than tolerance. In case of a cut appends "... (# more bytes)". (# cannot be less than tolerance)

Parameters:

str -

nMax -

nTolerance -

Returns:

commonPrefix

public static String commonPrefix(String sa,
                                  String sb,
                                  boolean skipLast)

Returns the common prefix of the given strings

Returns:

longestPrefixLookup

public static <T> String longestPrefixLookup(String lookup,
                                             NavigableSet<String> prefixes)

longestPrefixLookup

public static <T> String longestPrefixLookup(String lookup,
                                             boolean inclusive,
                                             NavigableSet<String> prefixes)

longestPrefixLookup

public static <T> Map.Entry<String,T> longestPrefixLookup(String lookup,
                                                                NavigableMap<String,T> prefixMap)

getAllPrefixes

public static <T> Map<String,T> getAllPrefixes(String lookup,
                                                     boolean inclusive,
                                                     NavigableMap<String,T> prefixMap)

getAllPrefixes

public static <T> NavigableSet<String> getAllPrefixes(String lookup,
                                                      boolean inclusive,
                                                      NavigableSet<String> prefixMap)

getAllPrefixes

public static <T> Map<String,T> getAllPrefixes(String lookup,
                                                     boolean inclusive,
                                                     SortedMap<String,T> prefixMap)

getAllPrefixedEntries

public static <T> Map<String,T> getAllPrefixedEntries(String prefix,
                                                            boolean inclusive,
                                                            SortedMap<String,T> prefixMap)

getAllPrefixedEntries

public static <T> Map<String,T> getAllPrefixedEntries(String prefix,
                                                            boolean inclusive,
                                                            NavigableMap<String,T> prefixMap)

longestPrefixLookup

public static <T> Map.Entry<String,T> longestPrefixLookup(String lookup,
                                                                boolean inclusive,
                                                                NavigableMap<String,T> prefixMap)

Looks up an element in the given map that is the longest prefix of the given lookup key.

Parameters:

lookup -

prefixMap -

Returns:

longestPrefixLookup

public static <T> Map.Entry<String,T> longestPrefixLookup(String lookup,
                                                                boolean inclusive,
                                                                SortedMap<String,T> prefixMap)

shortestMatchLookup

public static <V> Map.Entry<String,V> shortestMatchLookup(String prefix,
                                                                boolean inclusive,
                                                                NavigableMap<String,V> items)

shortestMatchLookup

public static String shortestMatchLookup(String prefix,
                                         boolean inclusive,
                                         NavigableSet<String> items)

getMatchBySuffix

public static <T> Map.Entry<String,T> getMatchBySuffix(String str,
                                                             Map<String,T> map)

urlEncode

public static String urlEncode(String str)

Helper functions to get rid of that exception. Afaik UTF8 en/de-coding cannot fail (read it somewhere, not confirmed)

Parameters:

str -

Returns:

urlDecode

public static String urlDecode(String str)

md5Hash

public static String md5Hash(byte[] bytes)

calculate md5 hash of the string

Parameters:

bytes -

Returns:

bytesToHexString

public static String bytesToHexString(byte[] bytes)

md5Hash

public static String md5Hash(String string)