Rice Pastry API

rice.p2p.util
Class ImmutableSortedMap

java.lang.Object
  extended by rice.p2p.util.ImmutableSortedMap
All Implemented Interfaces:
java.io.Serializable, java.util.Map, java.util.SortedMap

public class ImmutableSortedMap
extends java.lang.Object
implements java.util.SortedMap, java.io.Serializable

Version:
$Id: ImmutableSortedMap.java 3524 2007-01-09 14:09:27Z jeffh $
Author:
Alan Mislove
See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from interface java.util.Map
java.util.Map.Entry<K,V>
 
Field Summary
protected  java.util.SortedMap map
           
 
Constructor Summary
ImmutableSortedMap(java.util.SortedMap map)
          Constructor which takes an existing map
 
Method Summary
 void clear()
          Removes all mappings from this map (optional operation).
 java.util.Comparator comparator()
          Returns the comparator associated with this sorted map, or null if it uses its keys' natural ordering.
 boolean containsKey(java.lang.Object key)
          Returns true if this map contains a mapping for the specified key.
 boolean containsValue(java.lang.Object value)
          Returns true if this map maps one or more keys to the specified value.
 java.util.Set entrySet()
          Returns a set view of the mappings contained in this map.
 java.lang.Object firstKey()
          Returns the first (lowest) key currently in this sorted map.
 java.lang.Object get(java.lang.Object key)
          Returns the value to which this map maps the specified key.
 java.util.SortedMap headMap(java.lang.Object toKey)
          Returns a view of the portion of this sorted map whose keys are strictly less than toKey.
 boolean isEmpty()
          Returns true if this map contains no key-value mappings.
 java.util.Set keySet()
          Returns a set view of the keys contained in this map.
 java.lang.Object lastKey()
          Returns the last (highest) key currently in this sorted map.
 java.lang.Object put(java.lang.Object key, java.lang.Object value)
          Associates the specified value with the specified key in this map (optional operation).
 void putAll(java.util.Map t)
          Copies all of the mappings from the specified map to this map (optional operation).
 java.lang.Object remove(java.lang.Object key)
          Removes the mapping for this key from this map if it is present (optional operation).
 int size()
          Returns the number of key-value mappings in this map.
 java.util.SortedMap subMap(java.lang.Object fromKey, java.lang.Object toKey)
          Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.
 java.util.SortedMap tailMap(java.lang.Object fromKey)
          Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.
 java.util.Collection values()
          Returns a collection view of the values contained in this map.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface java.util.Map
equals, hashCode
 

Field Detail

map

protected java.util.SortedMap map
Constructor Detail

ImmutableSortedMap

public ImmutableSortedMap(java.util.SortedMap map)
Constructor which takes an existing map

Parameters:
map - the existing map
Method Detail

comparator

public java.util.Comparator comparator()
Returns the comparator associated with this sorted map, or null if it uses its keys' natural ordering.

Specified by:
comparator in interface java.util.SortedMap
Returns:
the comparator associated with this sorted map, or null if it uses its keys' natural ordering.

subMap

public java.util.SortedMap subMap(java.lang.Object fromKey,
                                  java.lang.Object toKey)
Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.

Specified by:
subMap in interface java.util.SortedMap
Parameters:
fromKey - low endpoint (inclusive) of the subMap.
toKey - high endpoint (exclusive) of the subMap.
Returns:
a view of the specified range within this sorted map.

headMap

public java.util.SortedMap headMap(java.lang.Object toKey)
Returns a view of the portion of this sorted map whose keys are strictly less than toKey.

Specified by:
headMap in interface java.util.SortedMap
Parameters:
toKey - high endpoint (exclusive) of the subMap.
Returns:
a view of the specified initial range of this sorted map.

tailMap

public java.util.SortedMap tailMap(java.lang.Object fromKey)
Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.

Specified by:
tailMap in interface java.util.SortedMap
Parameters:
fromKey - low endpoint (inclusive) of the tailMap.
Returns:
a view of the specified final range of this sorted map.

firstKey

public java.lang.Object firstKey()
Returns the first (lowest) key currently in this sorted map.

Specified by:
firstKey in interface java.util.SortedMap
Returns:
the first (lowest) key currently in this sorted map.
Throws:
java.util.NoSuchElementException - if this map is empty.

lastKey

public java.lang.Object lastKey()
Returns the last (highest) key currently in this sorted map.

Specified by:
lastKey in interface java.util.SortedMap
Returns:
the last (highest) key currently in this sorted map.
Throws:
java.util.NoSuchElementException - if this map is empty.

size

public int size()
Returns the number of key-value mappings in this map. If the map contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.

Specified by:
size in interface java.util.Map
Returns:
the number of key-value mappings in this map.

isEmpty

public boolean isEmpty()
Returns true if this map contains no key-value mappings.

Specified by:
isEmpty in interface java.util.Map
Returns:
true if this map contains no key-value mappings.

containsKey

public boolean containsKey(java.lang.Object key)
Returns true if this map contains a mapping for the specified key.

Specified by:
containsKey in interface java.util.Map
Parameters:
key - key whose presence in this map is to be tested.
Returns:
true if this map contains a mapping for the specified

containsValue

public boolean containsValue(java.lang.Object value)
Returns true if this map maps one or more keys to the specified value.

Specified by:
containsValue in interface java.util.Map
Parameters:
value - value whose presence in this map is to be tested.
Returns:
true if this map maps one or more keys to the specified value.

get

public java.lang.Object get(java.lang.Object key)
Returns the value to which this map maps the specified key. Returns null if the map contains no mapping for this key.

Specified by:
get in interface java.util.Map
Parameters:
key - key whose associated value is to be returned.
Returns:
the value to which this map maps the specified key, or null if the map contains no mapping for this key.

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)
Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for this key, the old value is replaced by the specified value.

Specified by:
put in interface java.util.Map
Parameters:
key - key with which the specified value is to be associated.
value - value to be associated with the specified key.
Returns:
previous value associated with specified key, or null if there was no mapping for key. A null return can also indicate that the map previously associated null with the specified key, if the implementation supports null values.
Throws:
java.lang.UnsupportedOperationException - if the put operation is not supported by this map.

remove

public java.lang.Object remove(java.lang.Object key)
Removes the mapping for this key from this map if it is present (optional operation). More formally, if this map contains a mapping from key k to value v such that (key==null ? k==null : key.equals(k)), that mapping is removed.

Specified by:
remove in interface java.util.Map
Parameters:
key - key whose mapping is to be removed from the map.
Returns:
previous value associated with specified key, or null if there was no mapping for key.

putAll

public void putAll(java.util.Map t)
Copies all of the mappings from the specified map to this map (optional operation).

Specified by:
putAll in interface java.util.Map
Parameters:
t - Mappings to be stored in this map.

clear

public void clear()
Removes all mappings from this map (optional operation).

Specified by:
clear in interface java.util.Map
Throws:
java.lang.UnsupportedOperationException - clear is not supported by this map.

keySet

public java.util.Set keySet()
Returns a set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress, the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll retainAll, and clear operations. It does not support the add or addAll operations.

Specified by:
keySet in interface java.util.Map
Returns:
a set view of the keys contained in this map.

values

public java.util.Collection values()
Returns a collection view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress, the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Collection.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Specified by:
values in interface java.util.Map
Returns:
a collection view of the values contained in this map.

entrySet

public java.util.Set entrySet()
Returns a set view of the mappings contained in this map. Each element in the returned set is a Map.Entry. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress, the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll and clear operations. It does not support the add or addAll operations.

Specified by:
entrySet in interface java.util.Map
Returns:
a set view of the mappings contained in this map.

Rice Pastry API

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