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com.tangosol.util
Class KeyValueArrayMap

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.AbstractKeyBasedMap
com.tangosol.util.KeyValueArrayMap

All Implemented Interfaces:

java.util.Map

public class KeyValueArrayMap

extends AbstractKeyBasedMap

KeyValueArrayMap is a Map implementation backed by an array of keys, and an array of the associated values.

This implementation:

• does not support updates or removals
• does not ensure the uniqueness of keys (this is the caller's responsibility)
• is not thread-safe

Since:

Coherence 12.1.2

Author:

rhl 2011.12.20

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.util.AbstractKeyBasedMap

AbstractKeyBasedMap.EntrySet, AbstractKeyBasedMap.KeySet, AbstractKeyBasedMap.ValuesCollection

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry

Field Summary

protected java.lang.Object[]	m_aoKey The array containing map keys.
protected java.lang.Object[]	m_aoValue The array containing map values.
protected int	m_cSize The number of map entries.
protected int	m_iKey The index into the key array of the first key.
protected int	m_iValue The index into the value array of the first value.

Constructor Summary

KeyValueArrayMap(java.lang.Object[] aoKey, int iKey, java.lang.Object[] aoValue, int iValue, int cSize)
Construct a KeyValueArrayMap backed by ranges of the specified key and value arrays.

KeyValueArrayMap(java.lang.Object[] aoKey, java.lang.Object[] aoValue)
Construct a KeyValueArrayMap backed by the specified key and value arrays.

Method Summary

java.lang.Object	get(java.lang.Object oKey) Returns the value to which this map maps the specified key.
protected java.util.Iterator	iterateKeys() Create an iterator over the keys in this Map.
int	size() Returns the number of key-value mappings in this map.

Methods inherited from class com.tangosol.util.AbstractKeyBasedMap

clear, clone, containsKey, containsValue, entrySet, equals, getAll, hashCode, instantiateEntrySet, instantiateKeySet, instantiateValues, isEmpty, keySet, put, putAll, remove, removeBlind, toString, values

Field Detail

m_aoKey

protected java.lang.Object[] m_aoKey

The array containing map keys.

m_aoValue

protected java.lang.Object[] m_aoValue

The array containing map values.

m_iKey

protected int m_iKey

The index into the key array of the first key.

m_iValue

protected int m_iValue

The index into the value array of the first value.

m_cSize

protected int m_cSize

The number of map entries.

Constructor Detail

KeyValueArrayMap

public KeyValueArrayMap(java.lang.Object[] aoKey,
                        java.lang.Object[] aoValue)

Construct a KeyValueArrayMap backed by the specified key and value arrays. The specified arrays must be non-null and of equal length.

Parameters:

aoKey - the array of keys

aoValue - the array of values

KeyValueArrayMap

public KeyValueArrayMap(java.lang.Object[] aoKey,
                        int iKey,
                        java.lang.Object[] aoValue,
                        int iValue,
                        int cSize)

Construct a KeyValueArrayMap backed by ranges of the specified key and value arrays.

Parameters:

aoKey - the array of keys

iKey - the index of the first key

aoValue - the array of values

iValue - the index of the first value

cSize - the number of entries

Method Detail

get

public java.lang.Object get(java.lang.Object oKey)

Returns the value to which this map maps the specified key.

Specified by:

get in interface java.util.Map

Specified by:

get in class AbstractKeyBasedMap

Parameters:

oKey - the key object

Returns:

the value to which this map maps the specified key, or null if the map contains no mapping for this key

iterateKeys

protected java.util.Iterator iterateKeys()

Create an iterator over the keys in this Map. The Iterator must support remove() if the Map supports removal.

Specified by:

iterateKeys in class AbstractKeyBasedMap

Returns:

a new instance of an Iterator over the keys in this Map

size

public int size()

Returns the number of key-value mappings in this map.

Specified by:

size in interface java.util.Map

Overrides:

size in class AbstractKeyBasedMap

Returns:

the number of key-value mappings in this map

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