//-----------------------------------------------------------------------
/**
* Decorates the specified map to add the MultiKeyMap API and fast query.
* The map must not be null and must be empty.
*
* @param map the map to decorate, not null
* @throws IllegalArgumentException if the map is null or not empty
*/
public static MultiKeyMap decorate(AbstractHashedMap map)
{
if (map == null)
{
throw new java.lang.IllegalArgumentException("Map must not be null");
}
if (map.size() > 0)
{
throw new java.lang.IllegalArgumentException("Map must be empty");
}
return(new MultiKeyMap(map));
}
/**
* Is the key equal to the combined key.
*
* @param entry the entry to compare to
* @param key1 the first key
* @param key2 the second key
* @param key3 the third key
* @param key4 the fourth key
* @return true if the key matches
*/
protected bool isEqualKey(AbstractHashedMap.HashEntry entry, Object key1, Object key2, Object key3, Object key4)
{
MultiKey multi = (MultiKey)entry.getKey();
return
multi.size() == 4 &&
(key1 == null ? multi.getKey(0) == null : key1.equals(multi.getKey(0))) &&
(key2 == null ? multi.getKey(1) == null : key2.equals(multi.getKey(1))) &&
(key3 == null ? multi.getKey(2) == null : key3.equals(multi.getKey(2))) &&
(key4 == null ? multi.getKey(3) == null : key4.equals(multi.getKey(3)));
}
//-----------------------------------------------------------------------
/**
* Constructs a new MultiKeyMap that decorates a <code>HashedMap</code>.
*/
public MultiKeyMap()
: base()
{
map = new HashedMap();
}
//-----------------------------------------------------------------------
/**
* Decorates the specified map to add the MultiKeyMap API and fast query.
* The map must not be null and must be empty.
*
* @param map the map to decorate, not null
* @throws IllegalArgumentException if the map is null or not empty
*/
public static MultiKeyMap decorate(AbstractHashedMap map)
{
if (map == null)
{
throw new java.lang.IllegalArgumentException("Map must not be null");
}
if (map.size() > 0)
{
throw new java.lang.IllegalArgumentException("Map must be empty");
}
return new MultiKeyMap(map);
}
/**
* Constructor that decorates the specified map and is called from
* {@link #decorate(AbstractHashedMap)}.
* The map must not be null and should be empty or only contain valid keys.
* This constructor performs no validation.
*
* @param map the map to decorate
*/
protected MultiKeyMap(AbstractHashedMap map)
: base()
{
this.map = map;
}
/**
* Constructor that decorates the specified map and is called from
* {@link #decorate(AbstractHashedMap)}.
* The map must not be null and should be empty or only contain valid keys.
* This constructor performs no validation.
*
* @param map the map to decorate
*/
protected MultiKeyMap(AbstractHashedMap map)
: base()
{
this.map = map;
}
//-----------------------------------------------------------------------
/**
* Constructs a new MultiKeyMap that decorates a <code>HashedMap</code>.
*/
public MultiKeyMap()
: base()
{
map = new HashedMap();
}
protected internal ReferenceValues(AbstractHashedMap parent)
: base(parent)
{
}
protected internal ReferenceKeySet(AbstractHashedMap parent)
: base(parent)
{
}
internal ReferenceEntrySet(AbstractHashedMap parent)
: base(parent)
{
}
