Package com.couchbase.client.core.util

Class CbCollections

java.lang.Object
com.couchbase.client.core.util.CbCollections
@Internal public class CbCollections extends Object

  • Method Summary

    Modifier and Type
    Method
    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(String s)
     
    static boolean
    isNullOrEmpty(Collection<?> c)
     
    static boolean
    isNullOrEmpty(Map<?,?> m)
     
    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.
    static <K, V1, V2> Map<K,V2>
    transformValues(Map<K,V1> map, Function<V1,V2> transformer)
     

    Methods inherited from class java.lang.Object

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

  • Method Details

    • 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

    • transformValues

      public static <K, V1, V2> Map<K,V2> transformValues(Map<K,V1> map, Function<V1,V2> transformer)