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java.lang.Objectjava.util.AbstractMap<K,V>
org.apache.commons.collections15.map.AbstractHashedMap<K,V>
org.apache.commons.collections15.map.IdentityMap<K,V>
public class IdentityMap<K,V>
A Map implementation that matches keys and values based
on == not equals().
| Nested Class Summary | |
|---|---|
protected static class |
IdentityMap.IdentityEntry<K,V>
HashEntry |
| Nested classes/interfaces inherited from class org.apache.commons.collections15.map.AbstractHashedMap |
|---|
AbstractHashedMap.EntrySet<K,V>, AbstractHashedMap.EntrySetIterator<K,V>, AbstractHashedMap.HashEntry<K,V>, AbstractHashedMap.HashIterator<K,V>, AbstractHashedMap.HashMapIterator<K,V>, AbstractHashedMap.KeySet<K,V>, AbstractHashedMap.KeySetIterator<K,V>, AbstractHashedMap.Values<K,V>, AbstractHashedMap.ValuesIterator<K,V> |
| Nested classes/interfaces inherited from interface java.util.Map |
|---|
Map.Entry<K,V> |
| Field Summary |
|---|
| Fields inherited from class org.apache.commons.collections15.map.AbstractHashedMap |
|---|
data, DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR, DEFAULT_THRESHOLD, entrySet, GETKEY_INVALID, GETVALUE_INVALID, keySet, loadFactor, MAXIMUM_CAPACITY, modCount, NO_NEXT_ENTRY, NO_PREVIOUS_ENTRY, NULL, REMOVE_INVALID, SETVALUE_INVALID, size, threshold, values |
| Constructor Summary | |
|---|---|
IdentityMap()
Constructs a new empty map with default size and load factor. |
|
IdentityMap(int initialCapacity)
Constructs a new, empty map with the specified initial capacity. |
|
IdentityMap(int initialCapacity,
float loadFactor)
Constructs a new, empty map with the specified initial capacity and load factor. |
|
IdentityMap(Map<? extends K,? extends V> map)
Constructor copying elements from another map. |
|
| Method Summary | |
|---|---|
Object |
clone()
Clones the map without cloning the keys or values. |
protected AbstractHashedMap.HashEntry<K,V> |
createEntry(AbstractHashedMap.HashEntry<K,V> next,
int hashCode,
K key,
V value)
Creates an entry to store the data. |
protected int |
hash(Object key)
Gets the hash code for the key specified. |
protected boolean |
isEqualKey(Object key1,
Object key2)
Compares two keys for equals. |
protected boolean |
isEqualValue(Object value1,
Object value2)
Compares two values for equals. |
| Methods inherited from class org.apache.commons.collections15.map.AbstractHashedMap |
|---|
addEntry, addMapping, calculateNewCapacity, calculateThreshold, checkCapacity, clear, containsKey, containsValue, createEntrySetIterator, createKeySetIterator, createValuesIterator, destroyEntry, doReadObject, doWriteObject, ensureCapacity, entryHashCode, entryKey, entryNext, entrySet, entryValue, equals, get, getEntry, hashCode, hashIndex, init, isEmpty, keySet, mapIterator, put, putAll, remove, removeEntry, removeMapping, reuseEntry, size, toString, updateEntry, values |
| Methods inherited from class java.lang.Object |
|---|
finalize, getClass, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public IdentityMap()
public IdentityMap(int initialCapacity)
initialCapacity - the initial capacity
IllegalArgumentException - if the initial capacity is less than one
public IdentityMap(int initialCapacity,
float loadFactor)
initialCapacity - the initial capacityloadFactor - the load factor
IllegalArgumentException - if the initial capacity is less than one
IllegalArgumentException - if the load factor is less than zeropublic IdentityMap(Map<? extends K,? extends V> map)
map - the map to copy
NullPointerException - if the map is null| Method Detail |
|---|
protected int hash(Object key)
hash in class AbstractHashedMap<K,V>key - the key to get a hash code for
protected boolean isEqualKey(Object key1,
Object key2)
==.
isEqualKey in class AbstractHashedMap<K,V>key1 - the first key to comparekey2 - the second key to compare
protected boolean isEqualValue(Object value1,
Object value2)
==.
isEqualValue in class AbstractHashedMap<K,V>value1 - the first value to comparevalue2 - the second value to compare
protected AbstractHashedMap.HashEntry<K,V> createEntry(AbstractHashedMap.HashEntry<K,V> next,
int hashCode,
K key,
V value)
createEntry in class AbstractHashedMap<K,V>next - the next entry in sequencehashCode - the hash code to usekey - the key to storevalue - the value to store
public Object clone()
clone in class AbstractHashedMap<K,V>
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