org.apache.sshd.common.util

Class GenericUtils

java.lang.Object

org.apache.sshd.common.util.GenericUtils

public final class GenericUtils
extends Object

Author:

Apache MINA SSHD Project

Field Summary

Fields

Modifier and Type	Field and Description
static Comparator<String>	CASE_SENSITIVE_ORDER The complement of String.CASE_INSENSITIVE_ORDER
static byte[]	EMPTY_BYTE_ARRAY
static Object[]	EMPTY_OBJECT_ARRAY
static String[]	EMPTY_STRING_ARRAY
static String	QUOTES

Method Summary

Modifier and Type	Method and Description
static <T extends Throwable> T	accumulateException(T current, T extra) Used to "accumulate" exceptions of the same type.
static <V extends Comparable<V>> SortedSet<V>	asSortedSet(Collection<? extends V> values)
static <V> SortedSet<V>	asSortedSet(Comparator<? super V> comp, Collection<? extends V> values)
static int	hashCode(long value)
static boolean	isEmpty(byte[] a)
static boolean	isEmpty(CharSequence cs)
static boolean	isEmpty(Collection<?> c)
static <T> boolean	isEmpty(Iterable<? extends T> iter)
static <T> boolean	isEmpty(Iterator<? extends T> iter)
static boolean	isEmpty(Map<?,?> m)
static <T> boolean	isEmpty(T... a)
static String	join(Iterable<?> iter, char ch)
static String	join(Iterable<?> iter, CharSequence sep)
static String	join(Iterator<?> iter, char ch)
static String	join(Iterator<?> iter, CharSequence sep)
static <T> String	join(T[] values, char ch)
static <T> String	join(T[] values, CharSequence sep)
static int	length(byte... a)
static int	length(CharSequence cs)
static <T> int	length(T... a)
static <V extends Comparable<V>> Comparator<V>	naturalComparator()
static <E extends Enum<E>> Set<E>	of(Collection<? extends E> values)
static <E extends Enum<E>> Set<E>	of(E... values)
static Throwable	resolveExceptionCause(Throwable t)
static int	safeCompare(String s1, String s2, boolean caseSensitive)
static int	size(Collection<?> c)
static int	size(Map<?,?> m)
static String[]	split(String s, char ch)
static CharSequence	stripDelimiters(CharSequence s, char delim)
static CharSequence	stripQuotes(CharSequence s)
static String	trimToEmpty(String s)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_BYTE_ARRAY

public static final byte[] EMPTY_BYTE_ARRAY

EMPTY_STRING_ARRAY

public static final String[] EMPTY_STRING_ARRAY

EMPTY_OBJECT_ARRAY

public static final Object[] EMPTY_OBJECT_ARRAY

CASE_SENSITIVE_ORDER

public static final Comparator<String> CASE_SENSITIVE_ORDER

The complement of String.CASE_INSENSITIVE_ORDER

QUOTES

public static final String QUOTES

See Also:

Constant Field Values

Method Detail

trimToEmpty

public static String trimToEmpty(String s)

safeCompare

public static int safeCompare(String s1,
                              String s2,
                              boolean caseSensitive)

length

public static int length(CharSequence cs)

isEmpty

public static boolean isEmpty(CharSequence cs)

split

public static String[] split(String s,
                             char ch)

join

public static <T> String join(T[] values,
                              char ch)

join

public static String join(Iterable<?> iter,
                          char ch)

join

public static String join(Iterator<?> iter,
                          char ch)

join

public static <T> String join(T[] values,
                              CharSequence sep)

join

public static String join(Iterable<?> iter,
                          CharSequence sep)

join

public static String join(Iterator<?> iter,
                          CharSequence sep)

size

public static int size(Collection<?> c)

isEmpty

public static boolean isEmpty(Collection<?> c)

size

public static int size(Map<?,?> m)

isEmpty

public static boolean isEmpty(Map<?,?> m)

isEmpty

public static boolean isEmpty(byte[] a)

length

public static int length(byte... a)

length

@SafeVarargs
public static <T> int length(T... a)

isEmpty

public static <T> boolean isEmpty(Iterable<? extends T> iter)

isEmpty

public static <T> boolean isEmpty(Iterator<? extends T> iter)

isEmpty

@SafeVarargs
public static <T> boolean isEmpty(T... a)

of

@SafeVarargs
public static <E extends Enum<E>> Set<E> of(E... values)

of

public static <E extends Enum<E>> Set<E> of(Collection<? extends E> values)

naturalComparator

public static <V extends Comparable<V>> Comparator<V> naturalComparator()

asSortedSet

public static <V extends Comparable<V>> SortedSet<V> asSortedSet(Collection<? extends V> values)

asSortedSet

public static <V> SortedSet<V> asSortedSet(Comparator<? super V> comp,
                                           Collection<? extends V> values)

Type Parameters:

V - The element type

Parameters:

comp - The (non-null) Comparator to use

values - The values to be added (ignored if null)

Returns:

A SortedSet containing the values (if any) sorted using the provided comparator

stripQuotes

public static CharSequence stripQuotes(CharSequence s)

Parameters:

s - The CharSequence to be checked

Returns:

If the sequence contains any of the QUOTES on both ends, then they are stripped, otherwise nothing is done

See Also:

stripDelimiters(CharSequence, char)

stripDelimiters

public static CharSequence stripDelimiters(CharSequence s,
                                           char delim)

Parameters:

s - The CharSequence to be checked

delim - The expected delimiter

Returns:

If the sequence contains the delimiter on both ends, then it is are stripped, otherwise nothing is done

resolveExceptionCause

public static Throwable resolveExceptionCause(Throwable t)

Parameters:

t - The original Throwable - ignored if null

Returns:

If Throwable.getCause() is non-null then the cause, otherwise the original exception - null if the original exception was null

accumulateException

public static <T extends Throwable> T accumulateException(T current,
                                                          T extra)

Used to "accumulate" exceptions of the same type. If the current exception is null then the new one becomes the current, otherwise the new one is added as a suppressed exception to the current one

Type Parameters:

T - The exception type

Parameters:

current - The current exception

extra - The extra/new exception

Returns:

The resolved exception

See Also:

Throwable.addSuppressed(Throwable)

hashCode

public static int hashCode(long value)