public abstract class AbstractMapPro<K,V> extends Object implements MapPro<K,V>, Externalizable
Modifier and Type | Class and Description |
---|---|
static class |
AbstractMapPro.SimpleEntry<K,V>
An Entry maintaining a key and a value.
|
static class |
AbstractMapPro.SimpleImmutableEntry<K,V>
An Entry maintaining an immutable key and value.
|
Modifier and Type | Method and Description |
---|---|
void |
clear() |
boolean |
containsKey(Object key) |
boolean |
containsValue(Object value) |
abstract Set<Map.Entry<K,V>> |
entrySet() |
boolean |
equals(Object o)
Compares the specified object with this map for equality.
|
V |
get(Object key) |
static PageException |
invalidKey(Map<?,?> map,
Object key,
boolean remove) |
boolean |
isEmpty() |
Set<K> |
keySet() |
V |
put(K key,
V value) |
void |
putAll(Map<? extends K,? extends V> m) |
void |
readExternal(ObjectInput in) |
V |
remove(Object key) |
int |
size() |
String |
toString()
Returns a string representation of this map.
|
Collection<V> |
values() |
void |
writeExternal(ObjectOutput out) |
public void writeExternal(ObjectOutput out) throws IOException
writeExternal
in interface Externalizable
IOException
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
readExternal
in interface Externalizable
IOException
ClassNotFoundException
public int size()
This implementation returns entrySet().size().
public boolean isEmpty()
This implementation returns size() == 0.
public boolean containsValue(Object value)
This implementation iterates over entrySet() searching for an entry with the specified value. If such an entry is found, true is returned. If the iteration terminates without finding such an entry, false is returned. Note that this implementation requires linear time in the size of the map.
containsValue
in interface Map<K,V>
ClassCastException
NullPointerException
public boolean containsKey(Object key)
This implementation iterates over entrySet() searching for an entry with the specified key. If such an entry is found, true is returned. If the iteration terminates without finding such an entry, false is returned. Note that this implementation requires linear time in the size of the map; many implementations will override this method.
containsKey
in interface Map<K,V>
ClassCastException
NullPointerException
public V get(Object key)
This implementation iterates over entrySet() searching for an entry with the specified key. If such an entry is found, the entry's value is returned. If the iteration terminates without finding such an entry, null is returned. Note that this implementation requires linear time in the size of the map; many implementations will override this method.
get
in interface Map<K,V>
ClassCastException
NullPointerException
public V put(K key, V value)
This implementation always throws an UnsupportedOperationException.
put
in interface Map<K,V>
UnsupportedOperationException
ClassCastException
NullPointerException
IllegalArgumentException
public V remove(Object key)
This implementation iterates over entrySet() searching for an entry with the specified key. If such an entry is found, its value is obtained with its getValue operation, the entry is removed from the collection (and the backing map) with the iterator's remove operation, and the saved value is returned. If the iteration terminates without finding such an entry, null is returned. Note that this implementation requires linear time in the size of the map; many implementations will override this method.
Note that this implementation throws an UnsupportedOperationException if the entrySet iterator does not support the remove method and this map contains a mapping for the specified key.
remove
in interface Map<K,V>
UnsupportedOperationException
ClassCastException
NullPointerException
public void putAll(Map<? extends K,? extends V> m)
This implementation iterates over the specified map's entrySet() collection, and calls this map's put operation once for each entry returned by the iteration.
Note that this implementation throws an UnsupportedOperationException if this map does not support the put operation and the specified map is nonempty.
putAll
in interface Map<K,V>
UnsupportedOperationException
ClassCastException
NullPointerException
IllegalArgumentException
public void clear()
This implementation calls entrySet().clear().
Note that this implementation throws an UnsupportedOperationException if the entrySet does not support the clear operation.
clear
in interface Map<K,V>
UnsupportedOperationException
public Set<K> keySet()
This implementation returns a set that subclasses AbstractSet
.
The subclass's iterator method returns a "wrapper object" over this
map's entrySet() iterator. The size method
delegates to this map's size method and the
contains method delegates to this map's
containsKey method.
The set is created the first time this method is called, and returned in response to all subsequent calls. No synchronization is performed, so there is a slight chance that multiple calls to this method will not all return the same set.
public Collection<V> values()
This implementation returns a collection that subclasses AbstractCollection
. The subclass's iterator method returns a
"wrapper object" over this map's entrySet() iterator.
The size method delegates to this map's size
method and the contains method delegates to this map's
containsValue method.
The collection is created the first time this method is called, and returned in response to all subsequent calls. No synchronization is performed, so there is a slight chance that multiple calls to this method will not all return the same collection.
public boolean equals(Object o)
This implementation first checks if the specified object is this map; if so it returns true. Then, it checks if the specified object is a map whose size is identical to the size of this map; if not, it returns false. If so, it iterates over this map's entrySet collection, and checks that the specified map contains each mapping that this map contains. If the specified map fails to contain such a mapping, false is returned. If the iteration completes, true is returned.
public String toString()
String.valueOf(Object)
.public static PageException invalidKey(Map<?,?> map, Object key, boolean remove)
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