Package it.unimi.dsi.fastutil.bytes

Class Byte2LongArrayMap

java.lang.Object
it.unimi.dsi.fastutil.bytes.AbstractByte2LongFunction
it.unimi.dsi.fastutil.bytes.AbstractByte2LongMap
it.unimi.dsi.fastutil.bytes.Byte2LongArrayMap
All Implemented Interfaces:
Byte2LongFunction, Byte2LongMap, Function<Byte,​Long>, Serializable, Cloneable, Function<Byte,​Long>, IntToLongFunction, Map<Byte,​Long>
public class Byte2LongArrayMap
extends AbstractByte2LongMap
implements Serializable, Cloneable
A simple, brute-force implementation of a map based on two parallel backing arrays.

The main purpose of this implementation is that of wrapping cleanly the brute-force approach to the storage of a very small number of pairs: just put them into two parallel arrays and scan linearly to find an item.

See Also:
Serialized Form

  • Constructor Details

    • Byte2LongArrayMap

      public Byte2LongArrayMap​(byte[] key, long[] value)
      Creates a new empty array map with given key and value backing arrays. The resulting map will have as many entries as the given arrays.

      It is responsibility of the caller that the elements of key are distinct.

      Parameters:
      key - the key array.
      value - the value array (it must have the same length as key).

    • Byte2LongArrayMap

      public Byte2LongArrayMap()
      Creates a new empty array map.

    • Byte2LongArrayMap

      public Byte2LongArrayMap​(int capacity)
      Creates a new empty array map of given capacity.
      Parameters:
      capacity - the initial capacity.

    • Byte2LongArrayMap

      public Byte2LongArrayMap​(Byte2LongMap m)
      Creates a new empty array map copying the entries of a given map.
      Parameters:
      m - a map.

    • Byte2LongArrayMap

      public Byte2LongArrayMap​(Map<? extends Byte,​? extends Long> m)
      Creates a new empty array map copying the entries of a given map.
      Parameters:
      m - a map.

    • Byte2LongArrayMap

      public Byte2LongArrayMap​(byte[] key, long[] value, int size)
      Creates a new array map with given key and value backing arrays, using the given number of elements.

      It is responsibility of the caller that the first size elements of key are distinct.

      Parameters:
      key - the key array.
      value - the value array (it must have the same length as key).
      size - the number of valid elements in key and value.

  • Method Details