tango.util.collection.model.MapView

interface MapView(K, V) : View!(V) ¶#

Maps maintain keyed elements. Any kind of Object may serve as a key for an element.

Author:

Doug Lea @version 0.93

For an introduction to this package see Overview .

bool allowsKey(K key) [public] ¶#

Report whether the MapT COULD include k as a key Always returns false if k is null

bool containsKey(K key) [public] ¶#

Report whether there exists any element with Key key.

Returns:

true if there is such an element

bool containsPair(K key, V value) [public] ¶#

Report whether there exists a (key, value) pair

Returns:

true if there is such an element

PairIterator!(K, V) keys() [public] ¶#

Return an enumeration that may be used to traverse through the keys (not elements) of the collection. The corresponding elements can be looked at by using at(k) for each key k. For example:

 Iterator keys = amap.keys();
 while (keys.more()) {
   K key = keys.get();
   T value = amap.get(key)
 // ...
 }
 

Returns:

the enumeration

int opApply(int delegate (inout K key, inout V value) dg) ¶#

traverse the collection content. This is cheaper than using an iterator since there is no creation cost involved.

V get(K key) [public] ¶#

Return the element associated with Key key. @param key a key

Returns:

element such that contains(key, element)

Throws:

NoSuchElementException if !containsKey(key)

bool get(K key, inout V element) [public] ¶#

Return the element associated with Key key. @param key a key

Returns:

whether the key is contained or not

bool keyOf(inout K key, V value) [public] ¶#

Return a key associated with element. There may be any number of keys associated with any element, but this returns only one of them (any arbitrary one), or false if no such key exists. @param key, a place to return a located key @param element, a value to try to find a key for.

Returns:

true where value is found; false otherwise