dw.util
Class SortedSet
Object
dw.util.Collection
dw.util.Set
dw.util.SortedSet
A set that further guarantees that its iterator will traverse the set in ascending element order, sorted according to the natural ordering of its elements (only supported for Number, String, Date, Money and Quantity), or by a comparator provided at sorted set creation time.
Constructor Summary
SortedSet()
Constructor to create a new SortedSet.
SortedSet(comparator : Object)
Constructor to create a new SortedSet.
SortedSet(collection : Collection)
Constructor for a new SortedSet.
Method Summary
clone() : SortedSet
Returns a shallow copy of this set.
first() : Object
Returns the first (lowest) element currently in this sorted set.
headSet(key : Object) : SortedSet
Returns a view of the portion of this sorted set whose elements are strictly less than toElement.
last() : Object
Returns the last (highest) element currently in this sorted set.
subSet(from : Object, to : Object) : SortedSet
Returns a view of the portion of this sorted set whose elements range from fromElement, inclusive, to toElement, exclusive.
tailSet(key : Object) : SortedSet
Returns a view of the portion of this sorted set whose elements are greater than or equal to fromElement.
Methods inherited from class Collection
Methods inherited from class Object
Constructor Detail
SortedSet
public SortedSet()
Constructor to create a new SortedSet.

SortedSet
public SortedSet(comparator : Object)
Constructor to create a new SortedSet. The constructor takes a compare function as additional parameter. This comparator determines identity and the order of the elements for this set. The order of the elements is determined with a comparator (see PropertyComparator) or with the help of the given function. The function must take two parameters and return a value <=-1 if the first parameter is smaller than the second, a value if >=1 if the first one is greater than the second parameter and a value in between like 0 if both are equal.
Parameters:
comparator - an instance of a PropertyComparator or a comparison function

SortedSet
public SortedSet(collection : Collection)
Constructor for a new SortedSet. The constructor initializes the SortedSet with the elements of the given collection.
Parameters:
collection - the collection of objects that are inserted into the set.

Method Detail
clone
clone() : SortedSet
Returns a shallow copy of this set.
Returns:
a shallow copy of this set.

first
first() : Object
Returns the first (lowest) element currently in this sorted set.
Returns:
the first (lowest) element currently in this sorted set.

headSet
headSet(key : Object) : SortedSet
Returns a view of the portion of this sorted set whose elements are strictly less than toElement. The returned sorted set is backed by this sorted set, so changes in the returned sorted set are reflected in this sorted set, and vice-versa. The returned sorted set supports all optional set operations.
Parameters:
key - high endpoint (exclusive) of the headSet.
Returns:
a view of the specified initial range of this sorted set.

last
last() : Object
Returns the last (highest) element currently in this sorted set.
Returns:
the last (highest) element currently in this sorted set.

subSet
subSet(from : Object, to : Object) : SortedSet
Returns a view of the portion of this sorted set whose elements range from fromElement, inclusive, to toElement, exclusive. (If fromElement and toElement are equal, the returned sorted set is empty.) The returned sorted set is backed by this sorted set, so changes in the returned sorted set are reflected in this sorted set, and vice-versa. The returned sorted set supports all optional set operations that this sorted set supports.
Parameters:
from - low endpoint (inclusive) of the subSet.
to - high endpoint (exclusive) of the subSet.
Returns:
a view of the specified range within this sorted set.

tailSet
tailSet(key : Object) : SortedSet
Returns a view of the portion of this sorted set whose elements are greater than or equal to fromElement. The returned sorted set is backed by this sorted set, so changes in the returned sorted set are reflected in this sorted set, and vice-versa. The returned sorted set supports all optional set operations.
Parameters:
key - low endpoint (inclusive) of the tailSet.
Returns:
a view of the specified final range of this sorted set.

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