Imagine the following class Person
================
| Person |
|--------------|
|- name |
|- age |
|--------------|
|+ drinkWater()|
|+ drinkBeer() |
================
Using OCL, is it possible to set a constraint on the operation drinkBeer()? For instance allowing only Person >= 21 year old to drink beer?
context Person::drinkBeer()
pre Adult: self.age >= 21
should probably do.
Related
Follwing another post:
I would like to know if OCL allows the following.
Imagine the following UML diagram.
How to use ocl to model: "a person can drinkWater() only if he is from country name 'ABCD'" AND if the population of the country is >= 1000000"
Of course, the example is purely fictive.
================ ================
| Person | | Country |
|--------------| |--------------|
|- name |------------------|- id |
|- age | |- name |
|--------------| |- population |
|+ drinkWater()| ================
|+ drinkBeer() |
================
You will need to name the role of Country (create a named attribute inside Person). So let's name that country. This of course can be used "as usual":
context Person::drinkWater()
pre Enough: self.country.name == "ABCD" and self.country.population >= 1000000
Maybe this is related to math.stacexhange, but I am affraid, that I will get a formula in answer what I won't undersand.
I have products in our database, and I have products from different suppliers in another table.
What I want is to pair, these supplieres products to our products if it is possible, or show for me at least show me a list, where the matching is high.
I did iterate throught all the suppliers products, and explodes the product name by spaces, and store it in a table, and the count of the occurence.
The table seems like this.
+--------+-------------+---------------+-------+
| id | word | originalWord | count |
+--------+-------------+---------------+-------+
| 220950 | Tracer | Tracer | 493 |
| 220951 | Destroyer | Destroyer | 3 |
| 220952 | Avago5050 | Avago5050 | 4 |
| 220953 | mouse | mouse | 2535 |
| 220954 | TRAMYS44916 | /TRAMYS44916/ | 2 |
| 220955 | GameZone | GameZone | 16 |
| 220956 | Enduro | Enduro | 3 |
| 220957 | AVAGO | AVAGO | 10 |
| 220958 | 5050 | 5050 | 4 |
| 220959 | optical | optical | 2370 |
| 220960 | USB | USB | 6160 |
+--------+-------------+---------------+-------+
and so on. Of course, in another table I stored, what is the product id for each word.
So what I want is to determine the weight of a word by occurence.
As you see, the word TRAMYS44916 is occured only twice, almost certain that is a partnumber, so this is the most heavy word. It weight should be 1.
Let's say the most occured is USB with 6160 occurence, so it weight should be like 0.01 or something like that, I think.
What is the best way to get all the weights of the words?
There are other tables for other suppliers so dispersion is always change.
This reminds me of Naive Bayes text classification, so to determine which product should it belongs to, you can calculate tf-idf of all the words.
Then if you want to pair it from another product name, you can decompose it to words again and select the product id based on the highest term value, however maybe you should specify some threshold for this, because in some cases it would not be that clear.
tf-idf = ("number of word matches in product name"/"word count of product name") * log ("number of products" / "number of products that contains the word")
You can see how it is done in the example here (In your case the document will be the product full name): https://en.wikipedia.org/wiki/Tf–idf#Example_of_tf.E2.80.93idf
Example implementation in Java: https://guendouz.wordpress.com/2015/02/17/implementation-of-tf-idf-in-java/
I want to create a bundle in an application where the user has the ability to create forms.
These forms will be questionnaires with different answers. Do you know if there is already a similar bundle exists?
If it does not exist. How should I proceed? I always create the forms only on files like "Form\Type\UserType".
In this case, would have to be generated dynamically from the database, right? Only I miss the approach, can anyone give a hint on how I can realize this?
Update:
Maybe i think to complicated. I'm not sure if an form service solve my problem. Know i created a database structure to describe my initial situation.
The user can create on a backend following records.
A scale, a scale can contain many answers (yes, no, maybe, good, better ...)
A question category
A question, can be assigned to many categories and many questionnairies
A questionnaire, can contain many questions and here can the user assign a scale to a question.
Table Scale
+----+--------+------------+----------+-----------+------------+
| id | name | alignment | isActive | isDeleted | createDate |
+----+--------+------------+----------+-----------+------------+
| 1 | Yes-No | horizontal | 1 | 1 | 2014-09-25 |
+----+--------+------------+----------+-----------+------------+
Table Items
+----+------+-------+------------+
| id | name | value | createDate |
+----+------+-------+------------+
| 1 | Yes | 1 | 2014-09-25 |
| 2 | No | 0 | 2014-09-25 |
+----+------+-------+------------+
ManyToMany 'scale_items'
+----------+----------+
| scale_id | items_id |
+----------+----------+
| 1 | 1 |
| 1 | 2 |
+----------+----------+
Table category for question categories
+----+---------+----------+-----------+------------+
| id | name | isActive | isDeleted | createDate |
+----+---------+----------+-----------+------------+
| 1 | General | 1 | 0 | 2014-09-25 |
+----+---------+----------+-----------+------------+
Table question
+----+-----------------------------------------+------------+
| id | question | createDate |
+----+-----------------------------------------+------------+
| 1 | Are you satisfied with the cleanliness? | 2014-09-25 |
+----+-----------------------------------------+------------+
ManyToMany 'question_category'
+-------------+-------------+
| question_id | category_id |
+-------------+-------------+
| 1 | 1 |
+-------------+-------------+
Table questionnaire
+----+-------------------+---------+----------+-----------+------------+
| id | name | version | isActive | isDeleted | createDate |
+----+-------------------+---------+----------+-----------+------------+
| 1 | General Questions | 2.2 | 1 | 0 | 2014-09-25 |
+----+-------------------+---------+----------+-----------+------------+
Now the database contain scales and items, questions and categories and a table for the questionnaire. Now i created a big relation to assign questions to questionnairies with a specified scale. A question can be assigned to different scales on different questionaries.
Table questionnaire_question_scale
+----+-------------+------------------+----------+------+--------+
| id | question_id | questionnaire_id | scale_id | page | hash |
+----+-------------+------------------+----------+------+--------+
| 1 | 1 | 1 | 1 | 1 | X321Z1 |
+----+-------------+------------------+----------+------+--------+
In the final step i create a relation table to assign a questionnaire to a couple of users.
Table questionnaire_user
+---------+------------------+
| user_id | questionnaire_id |
+---------+------------------+
| 21 | 1 |
+---------+------------------+
Now if the user log in i will render the above informations as form and here starts my problem :)
I think my solution was inefficient, because if many users log in to fill out a questionnaire i must generate every time the questionnaire (the complex structure) as form.
This is a end point for me, unfortunately I do not know further.
I would be very grateful for ideas, tips and solution approaches
If you want to build it yourself: I suggest creating a form type, declaring it as a service and injecting the form repository (explained further down) in it.For storing it in the data base: you can create two entities (actually creating a seperate entity for each field seems better but for the sake of simplicity I use two entities) : one for forms : YourBundle:Form and one for your form-fields YourBundle:FormField.the Form entity can only contain an id and a name and a one-to-many association to FormField. the data you store in the FormField will be: a many-to-one association to Form - the field name - the field type - the field's options.you can store the options as Json or other formats and later decode it.
I need to do a rule with no constraints in a decision table.
i.e.:
rule ...
when
$p : Person()
then
$p.setCity("none");
end
I tried these:
| 1 | RuleTable example |
| 2 | CONDITION | ACTION |
| 3 | p:Person() | |
| 4 | name | p.setCity("$param"); |
| 5 | description | config person |
| 6 | | none |
But when I run application throws this exception:
person cannot be resolved
Exception in thread "main" java.lang.IllegalArgumentException: No se puede parsear base de conocimiento.
Probably it fails because you have no real condition in your table.
Try putting $param == $param as condition
Use condition like as shown in picture. It will generate DRL as:
rule "XYZ"
when
doc:Document()
then
doc.setX("Y");
end
I have this sqlite3 table (simplified):
+--------+----------+-------+
| ROUTE | WPNumber | WPID |
+--------+----------+-------+
| A123 | 1 | WP001 |
| A123 | 2 | WP002 |
| A123 | 3 | WP003 |
| [...] | [...] | [...] |
| A123 | 20 | WP020 |
+--------+----------+-------+
Lets say I want to travel this route in the reverse direction (020 to 001).
How do I get all the WPID's in between? I know it is possible to build a query using BETWEEN and DESC, but then I'd have to build two seperate queries and have Python check when to use which query. Is it possible to have sqlite3 do the work, independent of the direction (reverse or not).
You can reverse the sorting order by reversing the number used in the ORDER BY clause.
Set the parameter ? to either 1 or -1:
SELECT WPID
FROM ThisTable
WHERE ROUTE = 'A123'
ORDER BY WPNumber * ?
If you would just use a similar query with DESC, the database would have a better opportunity to optimize the sorting with an index.