net.sf.hajdbc.util

Class Collections

java.lang.Object

net.sf.hajdbc.util.Collections

public class Collections
extends Object

Collection utility methods.

Author:

Paul Ferraro

Field Summary

Fields

Modifier and Type	Field and Description
static SortedMap<?,?>	EMPTY_SORTED_MAP
static SortedSet<?>	EMPTY_SORTED_SET

Method Summary

Methods

Modifier and Type	Method and Description
static <K,V> SortedMap<K,V>	emptySortedMap() Like Collections.emptyMap(), but returns a sorted map.
static <E> SortedSet<E>	emptySortedSet() Like Collections.emptySet(), but returns a sorted set.
static <K,V> SortedMap<K,V>	singletonSortedMap(K key, V value) Like Collections.singletonMap(Object, Object), but returns a sorted map.
static <E> SortedSet<E>	singletonSortedSet(E element) Like Collections.singleton(Object), but returns a sorted set.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_SORTED_SET

public static final SortedSet<?> EMPTY_SORTED_SET

EMPTY_SORTED_MAP

public static final SortedMap<?,?> EMPTY_SORTED_MAP

Method Detail

emptySortedSet

public static <E> SortedSet<E> emptySortedSet()

Like Collections.emptySet(), but returns a sorted set.

Type Parameters:

E - a collection type

Returns:

an empty sorted set

emptySortedMap

public static <K,V> SortedMap<K,V> emptySortedMap()

Like Collections.emptyMap(), but returns a sorted map.

Type Parameters:

K - the map's key type

V - the map's value type

Returns:

an empty sorted map

singletonSortedSet

public static <E> SortedSet<E> singletonSortedSet(E element)

Like Collections.singleton(Object), but returns a sorted set.

Type Parameters:

E -

Parameters:

element -

Returns:

a sorted set containing the single element.

singletonSortedMap

public static <K,V> SortedMap<K,V> singletonSortedMap(K key,
                                      V value)

Like Collections.singletonMap(Object, Object), but returns a sorted map.

Type Parameters:

K -

V -

Parameters:

key -

value -

Returns:

a sorted map containing the single key, value pair.