com.couchbase.client.core.util

Class CbCollections

java.lang.Object

com.couchbase.client.core.util.CbCollections

@Stability.Internal
public class CbCollections
extends Object

Method Summary

Modifier and Type	Method and Description
static <T> List<T>	copyToUnmodifiableList(Collection<T> c) Returns a new unmodifiable list with the same contents as the given collection.
static <T> Set<T>	copyToUnmodifiableSet(Collection<T> c) Returns a new unmodifiable set with the same contents as the given collection.
static boolean	isNullOrEmpty(Collection<?> c)
static boolean	isNullOrEmpty(Map<?,?> m)
static boolean	isNullOrEmpty(String s)
static <T> List<T>	listOf(T... items) Returns an unmodifiable list containing the given items.
static <K,V> Map<K,V>	mapOf() Returns an unmodifiable empty map.
static <K,V> Map<K,V>	mapOf(K key1, V value1) Returns an unmodifiable map containing the given key/value pairs.
static <K,V> Map<K,V>	mapOf(K key1, V value1, K key2, V value2) Returns an unmodifiable map containing the given key/value pairs.
static <K,V> Map<K,V>	mapOf(K key1, V value1, K key2, V value2, K key3, V value3) Returns an unmodifiable map containing the given key/value pairs.
static <K,V> Map<K,V>	mapOf(K key1, V value1, K key2, V value2, K key3, V value3, K key4, V value4) Returns an unmodifiable map containing the given key/value pairs.
static <K,V> Map<K,V>	mapOf(K key1, V value1, K key2, V value2, K key3, V value3, K key4, V value4, K key5, V value5) Returns an unmodifiable map containing the given key/value pairs.
static <T> Set<T>	setOf(T... items) Returns an unmodifiable set containing the given items.

Methods inherited from class java.lang.Object

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

Method Detail

copyToUnmodifiableList

public static <T> List<T> copyToUnmodifiableList(Collection<T> c)

Returns a new unmodifiable list with the same contents as the given collection.

Parameters:

c - may be null, in which case an empty list is returned.

copyToUnmodifiableSet

public static <T> Set<T> copyToUnmodifiableSet(Collection<T> c)

Returns a new unmodifiable set with the same contents as the given collection.

Parameters:

c - may be null, in which case an empty set is returned.

isNullOrEmpty

public static boolean isNullOrEmpty(Collection<?> c)

isNullOrEmpty

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

isNullOrEmpty

public static boolean isNullOrEmpty(String s)

setOf

@SafeVarargs
public static <T> Set<T> setOf(T... items)

Returns an unmodifiable set containing the given items.

Throws:

NullPointerException - if any item is null

InvalidArgumentException - if there are duplicate items

listOf

@SafeVarargs
public static <T> List<T> listOf(T... items)

Returns an unmodifiable list containing the given items.

Throws:

NullPointerException - if any item is null

mapOf

public static <K,V> Map<K,V> mapOf()

Returns an unmodifiable empty map.

mapOf

public static <K,V> Map<K,V> mapOf(K key1,
                                   V value1)

Returns an unmodifiable map containing the given key/value pairs.

Throws:

NullPointerException - if any key or value is null

InvalidArgumentException - if there are duplicate keys

mapOf

public static <K,V> Map<K,V> mapOf(K key1,
                                   V value1,
                                   K key2,
                                   V value2)

Returns an unmodifiable map containing the given key/value pairs.

Throws:

NullPointerException - if any key or value is null

InvalidArgumentException - if there are duplicate keys

mapOf

public static <K,V> Map<K,V> mapOf(K key1,
                                   V value1,
                                   K key2,
                                   V value2,
                                   K key3,
                                   V value3)

Returns an unmodifiable map containing the given key/value pairs.

Throws:

NullPointerException - if any key or value is null

InvalidArgumentException - if there are duplicate keys

mapOf

public static <K,V> Map<K,V> mapOf(K key1,
                                   V value1,
                                   K key2,
                                   V value2,
                                   K key3,
                                   V value3,
                                   K key4,
                                   V value4)

Returns an unmodifiable map containing the given key/value pairs.

Throws:

NullPointerException - if any key or value is null

InvalidArgumentException - if there are duplicate keys

mapOf

public static <K,V> Map<K,V> mapOf(K key1,
                                   V value1,
                                   K key2,
                                   V value2,
                                   K key3,
                                   V value3,
                                   K key4,
                                   V value4,
                                   K key5,
                                   V value5)

Returns an unmodifiable map containing the given key/value pairs.

Throws:

NullPointerException - if any key or value is null

InvalidArgumentException - if there are duplicate keys