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java.lang.Object | +--java.util.AbstractMap | +--harpoon.Util.Collections.PersistentEnvironment
PersistentEnvironment
is an Environment
built on a PersistentMap
.
Nested Class Summary |
Nested classes inherited from class harpoon.Util.Collections.Environment |
Environment.Mark |
Nested classes inherited from class java.util.Map |
Map.Entry |
Constructor Summary | |
PersistentEnvironment()
Creates a PersistentEnvironment with no mappings. |
|
PersistentEnvironment(Map m)
Creates a PersistentEnvironment with the same
mappings as the given Map . |
Method Summary | |
void |
clear()
Remove all mappings from this map. |
boolean |
containsKey(Object key)
Returns true if this map contains a mapping for the
specified key. |
Set |
entrySet()
Returns a set view of the mappings contained in this map. |
Object |
get(Object key)
Returns the value to which this map maps the specified key. |
Environment.Mark |
getMark()
Get a mark that will allow you to restore the current state of this environment. |
boolean |
isEmpty()
Returns true is this map contains no key-value mappings. |
Object |
put(Object key,
Object value)
Associates the specified value with the specified key in this map. |
Object |
remove(Object key)
Removes the mapping for this key from this map if present. |
int |
size()
Returns the numer of key-value mappings in this map. |
void |
undoToMark(Environment.Mark m)
Undo all changes since the supplied mark, restoring the map to its state at the time the mark was taken. |
Methods inherited from class java.util.AbstractMap |
clone, containsValue, equals, hashCode, keySet, putAll, toString, values |
Methods inherited from class java.lang.Object |
finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Map |
containsValue, equals, hashCode, keySet, putAll, values |
Constructor Detail |
public PersistentEnvironment()
PersistentEnvironment
with no mappings.
public PersistentEnvironment(Map m)
PersistentEnvironment
with the same
mappings as the given Map
.
Method Detail |
public void clear()
clear
in interface Map
clear
in class AbstractMap
public boolean isEmpty()
true
is this map contains no key-value mappings.
isEmpty
in interface Map
isEmpty
in class AbstractMap
public int size()
size
in interface Map
size
in class AbstractMap
public Object get(Object key)
get
in interface Map
get
in class AbstractMap
public Object put(Object key, Object value)
put
in interface Map
put
in class AbstractMap
public boolean containsKey(Object key)
true
if this map contains a mapping for the
specified key.
containsKey
in interface Map
containsKey
in class AbstractMap
public Object remove(Object key)
remove
in interface Map
remove
in class AbstractMap
public Environment.Mark getMark()
getMark
in interface Environment
public void undoToMark(Environment.Mark m)
undoToMark
in interface Environment
public Set entrySet()
entrySet
in interface Map
entrySet
in class AbstractMap
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