Package org.hipparchus.util

Class OpenIntToFieldHashMap<T extends FieldElement<T>>

java.lang.Object

org.hipparchus.util.AbstractOpenIntHashMap

org.hipparchus.util.OpenIntToFieldHashMap<T>

Type Parameters:

T - the type of the field elements

All Implemented Interfaces:

Serializable

public class OpenIntToFieldHashMap<T extends FieldElement<T>>
extends AbstractOpenIntHashMap
implements Serializable

Open addressed map from int to FieldElement.

This class provides a dedicated map from integers to FieldElements with a much smaller memory overhead than standard java.util.Map.

This class is not synchronized. The specialized iterators returned by iterator() are fail-fast: they throw a ConcurrentModificationException when they detect the map has been modified during iteration.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	OpenIntToFieldHashMap.Iterator	Iterator class for the map.

Nested classes/interfaces inherited from class org.hipparchus.util.AbstractOpenIntHashMap

AbstractOpenIntHashMap.BaseIterator, AbstractOpenIntHashMap.InsertionHolder, AbstractOpenIntHashMap.ValueCopier

Field Summary

Fields inherited from class org.hipparchus.util.AbstractOpenIntHashMap

DEFAULT_EXPECTED_SIZE, RESIZE_MULTIPLIER

Constructor Summary

Constructors

Constructor	Description
OpenIntToFieldHashMap(Field<T> field)	Build an empty map with default size and using zero for missing entries.
OpenIntToFieldHashMap(Field<T> field, int expectedSize)	Build an empty map with specified size and using zero for missing entries.
OpenIntToFieldHashMap(Field<T> field, int expectedSize, T missingEntries)	Build an empty map with specified size.
OpenIntToFieldHashMap(Field<T> field, T missingEntries)	Build an empty map with default size
OpenIntToFieldHashMap(OpenIntToFieldHashMap<T> source)	Copy constructor.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
T	get(int key)	Get the stored value associated with the given key
protected int	growTable(int oldIndex)	Grow the tables.
int	hashCode()
OpenIntToFieldHashMap<T>.Iterator	iterator()	Get an iterator over map elements.
T	put(int key, T value)	Put a value associated with a key in the map.
T	remove(int key)	Remove the value associated with a key.

Methods inherited from class org.hipparchus.util.AbstractOpenIntHashMap

containsKey, containsKey, doGrowTable, doRemove, equalKeys, equalStates, getCapacity, getSize, keysStatesHashCode, locate, put, resetCount, size

Methods inherited from class java.lang.Object

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

Constructor Details

OpenIntToFieldHashMap

public OpenIntToFieldHashMap(Field<T> field)

Build an empty map with default size and using zero for missing entries.

Parameters:

field - field to which the elements belong

OpenIntToFieldHashMap

public OpenIntToFieldHashMap(Field<T> field,
 T missingEntries)

Build an empty map with default size

Parameters:

field - field to which the elements belong

missingEntries - value to return when a missing entry is fetched

OpenIntToFieldHashMap

public OpenIntToFieldHashMap(Field<T> field,
 int expectedSize)

Build an empty map with specified size and using zero for missing entries.

Parameters:

field - field to which the elements belong

expectedSize - expected number of elements in the map

OpenIntToFieldHashMap

public OpenIntToFieldHashMap(Field<T> field,
 int expectedSize,
 T missingEntries)

Build an empty map with specified size.

Parameters:

field - field to which the elements belong

expectedSize - expected number of elements in the map

missingEntries - value to return when a missing entry is fetched

OpenIntToFieldHashMap

public OpenIntToFieldHashMap(OpenIntToFieldHashMap<T> source)

Copy constructor.

Parameters:

source - map to copy

Method Details

get

public T get(int key)

Get the stored value associated with the given key

Parameters:

key - key associated with the data

Returns:

data associated with the key

iterator

public OpenIntToFieldHashMap<T>.Iterator iterator()

Get an iterator over map elements.

The specialized iterators returned are fail-fast: they throw a ConcurrentModificationException when they detect the map has been modified during iteration.

Returns:

iterator over the map elements

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

remove

public T remove(int key)

Remove the value associated with a key.

Parameters:

key - key to which the value is associated

Returns:

removed value

put

public T put(int key,
 T value)

Put a value associated with a key in the map.

Parameters:

key - key to which value is associated

value - value to put in the map

Returns:

previous value associated with the key

growTable

protected int growTable(int oldIndex)

Grow the tables.

Specified by:

growTable in class AbstractOpenIntHashMap

Parameters:

oldIndex - index the entry being inserted should have used

Returns:

index the entry being inserted should really use