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java.lang.Object
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+--java.util.AbstractMap
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+--java.util.TreeMap
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+--org.apache.struts.util.FastTreeMap
A customized implementation of java.util.TreeMap designed
to operate in a multithreaded environment where the large majority of
method calls are read-only, instead of structural changes. When operating
in "fast" mode, read calls are non-synchronized and write calls perform the
following steps:
When first created, objects of this class default to "slow" mode, where
all accesses of any type are synchronized but no cloning takes place. This
is appropriate for initially populating the collection, followed by a switch
to "fast" mode (by calling setFast(true)) after initialization
is complete.
NOTE: If you are creating and accessing a
TreeMap only within a single thread, you should use
java.util.TreeMap directly (with no synchronization), for
maximum performance.
| Inner classes inherited from class java.util.TreeMap |
java.util.TreeMap.Entry |
| Inner classes inherited from class java.util.Map |
java.util.Map.Entry |
| Field Summary | |
protected boolean |
fast
Deprecated. Are we operating in "fast" mode? |
protected java.util.TreeMap |
map
Deprecated. The underlying map we are managing. |
| Fields inherited from class java.util.TreeMap |
BLACK, comparator, ENTRIES, entrySet, KEYS, keySet, modCount, RED, root, serialVersionUID, size, values, VALUES |
| Constructor Summary | |
FastTreeMap()
Deprecated. Construct a an empty map. |
|
FastTreeMap(java.util.Comparator comparator)
Deprecated. Construct an empty map with the specified comparator. |
|
FastTreeMap(java.util.Map map)
Deprecated. Construct a new map with the same mappings as the specified map, sorted according to the keys's natural order |
|
FastTreeMap(java.util.SortedMap map)
Deprecated. Construct a new map with the same mappings as the specified map, sorted according to the same ordering |
|
| Method Summary | |
void |
clear()
Deprecated. Remove all mappings from this map. |
java.lang.Object |
clone()
Deprecated. Return a shallow copy of this FastTreeMap instance. |
java.util.Comparator |
comparator()
Deprecated. Return the comparator used to order this map, or null
if this map uses its keys' natural order. |
boolean |
containsKey(java.lang.Object key)
Deprecated. Return true if this map contains a mapping for the
specified key. |
boolean |
containsValue(java.lang.Object value)
Deprecated. Return true if this map contains one or more keys mapping
to the specified value. |
java.util.Set |
entrySet()
Deprecated. Return a collection view of the mappings contained in this map. |
boolean |
equals(java.lang.Object o)
Deprecated. Compare the specified object with this list for equality. |
java.lang.Object |
firstKey()
Deprecated. Return the first (lowest) key currently in this sorted map. |
java.lang.Object |
get(java.lang.Object key)
Deprecated. Return the value to which this map maps the specified key. |
boolean |
getFast()
Deprecated. |
int |
hashCode()
Deprecated. Return the hash code value for this map. |
java.util.SortedMap |
headMap(java.lang.Object key)
Deprecated. Return a view of the portion of this map whose keys are strictly less than the specified key. |
boolean |
isEmpty()
Deprecated. Test if this list has no elements. |
java.util.Set |
keySet()
Deprecated. Return a set view of the keys contained in this map. |
java.lang.Object |
lastKey()
Deprecated. Return the last (highest) key currently in this sorted map. |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value)
Deprecated. Associate the specified value with the specified key in this map. |
void |
putAll(java.util.Map in)
Deprecated. Copy all of the mappings from the specified map to this one, replacing any mappings with the same keys. |
java.lang.Object |
remove(java.lang.Object key)
Deprecated. Remove any mapping for this key, and return any previously mapped value. |
void |
setFast(boolean fast)
Deprecated. |
int |
size()
Deprecated. Return the number of key-value mappings in this map. |
java.util.SortedMap |
subMap(java.lang.Object fromKey,
java.lang.Object toKey)
Deprecated. Return a view of the portion of this map whose keys are in the range fromKey (inclusive) to toKey (exclusive). |
java.util.SortedMap |
tailMap(java.lang.Object key)
Deprecated. Return a view of the portion of this map whose keys are greater than or equal to the specified key. |
java.util.Collection |
values()
Deprecated. Return a collection view of the values contained in this map. |
| Methods inherited from class java.util.TreeMap |
addAllForTreeSet, buildFromSorted, buildFromSorted, colorOf, compare, computeRedLevel, decrementSize, deleteEntry, firstEntry, fixAfterDeletion, fixAfterInsertion, getCeilEntry, getEntry, getPrecedingEntry, incrementSize, key, lastEntry, leftOf, parentOf, readObject, readTreeSet, rightOf, rotateLeft, rotateRight, setColor, successor, swapPosition, valEquals, valueSearchNonNull, valueSearchNull, writeObject |
| Methods inherited from class java.util.AbstractMap |
toString |
| Methods inherited from class java.lang.Object |
|
| Field Detail |
protected java.util.TreeMap map
protected boolean fast
| Constructor Detail |
public FastTreeMap()
public FastTreeMap(java.util.Comparator comparator)
comparator - The comparator to use for ordering tree elementspublic FastTreeMap(java.util.Map map)
map - The map whose mappings are to be copiedpublic FastTreeMap(java.util.SortedMap map)
map - The map whose mappings are to be copied| Method Detail |
public boolean getFast()
public void setFast(boolean fast)
public void clear()
clear in class java.util.TreeMappublic java.lang.Object clone()
FastTreeMap instance.
The keys and values themselves are not copied.clone in class java.util.TreeMappublic java.util.Comparator comparator()
null
if this map uses its keys' natural order.comparator in class java.util.TreeMappublic boolean containsKey(java.lang.Object key)
true if this map contains a mapping for the
specified key.containsKey in class java.util.TreeMapkey - Key to be searched forpublic boolean containsValue(java.lang.Object value)
true if this map contains one or more keys mapping
to the specified value.containsValue in class java.util.TreeMapvalue - Value to be searched forpublic java.util.Set entrySet()
Map.Entry.entrySet in class java.util.TreeMappublic boolean equals(java.lang.Object o)
Map.equals method.equals in class java.util.AbstractMapo - Object to be compared to this listpublic java.lang.Object firstKey()
firstKey in class java.util.TreeMappublic java.lang.Object get(java.lang.Object key)
null if the map contains no mapping for this key, or if
there is a mapping with a value of null. Use the
containsKey() method to disambiguate these cases.get in class java.util.TreeMapkey - Key whose value is to be returnedpublic int hashCode()
Map.hashCode method.hashCode in class java.util.AbstractMappublic java.util.SortedMap headMap(java.lang.Object key)
headMap in class java.util.TreeMapkey - Key higher than any in the returned mappublic boolean isEmpty()
isEmpty in class java.util.AbstractMappublic java.util.Set keySet()
keySet in class java.util.TreeMappublic java.lang.Object lastKey()
lastKey in class java.util.TreeMap
public java.lang.Object put(java.lang.Object key,
java.lang.Object value)
put in class java.util.TreeMapkey - The key with which the value is to be associatedvalue - The value to be associated with this keypublic void putAll(java.util.Map in)
putAll in class java.util.TreeMapin - Map whose mappings are to be copiedpublic java.lang.Object remove(java.lang.Object key)
remove in class java.util.TreeMapkey - Key whose mapping is to be removedpublic int size()
size in class java.util.TreeMap
public java.util.SortedMap subMap(java.lang.Object fromKey,
java.lang.Object toKey)
subMap in class java.util.TreeMapfromKey - Lower limit of keys for the returned maptoKey - Upper limit of keys for the returned mappublic java.util.SortedMap tailMap(java.lang.Object key)
tailMap in class java.util.TreeMapkey - Key less than or equal to any in the returned mappublic java.util.Collection values()
values in class java.util.TreeMap
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