OCL Collection Operators
Once you have a collection of objects, there are certain operators applicable to them.
You can use the OCL-Editor to see what they are:
| Operators | Description |
|---|---|
| ->append | Add another object last |
| ->asBag | Returns a Bag containing all elements of self. |
| ->asSequence | Returns a Sequence containing all elements of self. Element ordering is preserved when possible. |
| ->asSet | Returns a Set containing all elements of self. |
| ->at | Get the objects at X where the first index is 1 |
| ->at0 | Get the objects at X where the first index is 0 |
| ->collect | Returns a collection containing the result of applying expr on all elements contained in self. |
| ->count | Count how many meet a certain criteria |
| ->dictionary | Efficiently looks up values |
| ->difference | The difference between 2 collections |
| ->excluding | The collection except for this single object |
| ->exists | Returns true if at least one element in self validates the condition expr, false otherwise. |
| ->filterOnType | Only keep the ones of a certain type |
| ->first | Return the first object |
| ->forAll | Returns true if all the elements contained in self validate the condition expr, false otherwise. |
| ->groupBy | Build a collection of tuples grouped by some aspect |
| ->includes | Does the collection include the object |
| ->includesAll | Does the collection include the whole other collection |
| ->including | Returns the list with the element in the parameter included. |
| ->IndexOf | The 1 based index of an object in the collection possibly -1 if not existing |
| ->indexOf0 | The 0 based index of an object in the collection possibly -1 if not existing |
| ->intersection | The intersection of two collections |
| ->isEmpty | Returns true if the collection is empty |
| ->notEmpty | Returns true if self contains at least one element, false otherwise. |
| ->reject | Returns a collection with all elements of self except for those who validate the OclExpression expr. |
| ->select | Returns a collection with all elements of self that validate the OclExpression expr. |
| ->size | Returns the number of elements contained in self. |
| ->sum | Returns the sum of all elements contained in self if they support the '+' operation. |
| ->last | Returns the last object in the collection |
| ->orderBy | Sorts the collection on one or more properties |
| ->orderDescending | Sort the from biggest to smallest |
| ->orderGeneric | Sorts the list of properties with interchangeable sort order: (expr1, OclSortDirection::ascending, expr2, OclSortDirection::descending...) |
| ->prepend | Returns an OrderedSet containing object followed by all elements of self. |
| ->subsequence | Returns a smaller collection from a start to stop |
| ->symmetricDifference | The symmetric difference between the collections; ie all the objects in collection1 or collection2 but not in both |
| ->union | The set of objects in collection1 and objects in collection2 |
See this page for examples on collection operators.
Also check out: https://wiki.mdriven.net/index.php/OCLOperators
This page was edited more than 12 months ago on 05/01/2023. What links here
Pages in category "OCL Collection Operators"
The following 39 pages are in this category, out of 39 total.
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- Documentation:OCL Operators product
- Documentation:OCLOperators append
- Documentation:OCLOperators asBag
- Documentation:OCLOperators asSequence
- Documentation:OCLOperators asSet
- Documentation:OCLOperators at
- Documentation:OCLOperators at0
- Documentation:OCLOperators collect
- Documentation:OCLOperators collectNested
- Documentation:OCLOperators count
- Documentation:OCLOperators dictionary
- Documentation:OCLOperators difference
- Documentation:OCLOperators excluding
- Documentation:OCLOperators exists
- Documentation:OCLOperators filterOnType
- Documentation:OCLOperators first
- Documentation:OCLOperators forAll
- Documentation:OCLOperators groupBy
- Documentation:OCLOperators includes
- Documentation:OCLOperators includesAll
- Documentation:OCLOperators including
- Documentation:OCLOperators indexOf
- Documentation:OCLOperators indexOf0
- Documentation:OCLOperators intersection
- Documentation:OCLOperators isEmpty
- Documentation:OCLOperators last
- Documentation:OCLOperators notEmpty
- Documentation:OCLOperators orderBy
- Documentation:OCLOperators orderDescending
- Documentation:OCLOperators orderGeneric
- Documentation:OCLOperators prepend
- Documentation:OCLOperators reject
- Documentation:OCLOperators select
- Documentation:OCLOperators size
- Documentation:OCLOperators subSequence
- Documentation:OCLOperators sum
- Documentation:OCLOperators symmetricDifference
- Documentation:OCLOperators union