How can I make class diagram from the database diagram?
mysql,class,class-diagram,database-diagram
You can easily make ER diagram using the Reverse Engineering functionality of MySQL workbench. You just need to follow few simple steps: Ctrl+R and then next till Finish. Attaching an image for your reference....
Set within a Map in Java
java,aggregation,composition,class-diagram,java-collections-api
Try something like this class Project{ int pid; int name; //Getter and setter } Create Employee class public class Employee { int employeeId; String name; Set<Project> projects; //getter , setter or add methods } Now you can use above two classes in DAO public class EmployeesDao{ /* Get multiple employee-projects...
If a control class uses a method from another class, how do we model the association?
If a class A uses a method from another class B, you should model it as a Usage dependency from A to B depicted below Now I am pretty sure that you mix two differents User. When you said that you PortalController is able to manage a set of User,...
How to Model Inheritance
database-design,data-modeling,multiple-inheritance,class-diagram,erd
You have two options how to implement the class hierarchy formed by Seller and DeliverySubscriber being subtypes of User. If your subclasses/subtables do not have many additional properties/columns, one would normally use the Single Table Inheritance approach with just one table User and a type (or category) column for discriminating...
What is the correct graphical representation of an empty UML class?
uml,class-diagram,representation
Though @JimL's answer is correct, here is the section from Superstructures 2.5 that explains the use of compartments: The model in Figure B.6 specializes UMLDiagramElement and UMLShape into UMLCompartmentableShape and UMLCompartment, respectively, to make them concrete, add properties, and redefine inherited properties for shapes with segregated contents. UMLCompartmetableShape is the...
UML Class Diagram - Notation for 'OR'
Depending on the rest of your model's structure, there are different solutions. I supose there is also a class Nurse and that id does not have any special relationship with the Doctor (like inheritance from Employee or similar). So, this would be a generic solution. Add add an association between...
How to represent an attribute's data type as an array of objects on class diagram?
Both are correct, but the second one, when multiplicity is set to more than one is used is more natural, and it is not necessary do define collection class as it is shown on the first picture of your example. Simply said, multiplicity defines how many instances of specific type...
How to implement self association of a class in java?
java,class,oop,uml,class-diagram
It is not. You should know that if class have associetion with something it is like it has attribute that type with given cardinality. So for example Person would have given fields (omitting association classes): String name[1] String ssn[1] String addr[1] Company company[1] Person boss[0..*] Person worker[1..*] Then how to...
Database tables for tennis court booking system
mysql,uml,database-schema,class-diagram
Does not look too bad. You already have classes for the actors. So that's done. The "privileges" can be modeled by assigning the specialized classes the according methods. That is: Owner has a createClub() method and Player has book() etc. You need a Booking class that keeps track of the...
UML Class Diagram - A user can't send a message to another user if he's not interessted in his offer
This is a constraint which belongs to a use case. There are too many different ways this constraint can be implemented. So you can not infer that constraint to any class construct directly....
Shortcut for denoting or implying getters and setters in UML class diagrams
uml,getter-setter,class-diagram,specifications
You are correct: there is no need to include the (noise of) "boilerplate" signatures of standard setters and getters in a class model. Unfortunately, UML does not define a standard notation for implying getters and setters for private attributes. So, you'd have to use your own convention. For instance, you...
Multiple compositions in UML
You can have as many composite associations as you like on the class level. But each instance can only be part of one composition at a specific moment in time. UML superstructure says: If the whole has aggregationKind = composite then the part can be included in at most one...
Correct usage of composite pattern
java,design-patterns,uml,class-diagram,composite
The composite pattern really doesn't place any restrictions on how you represent the children of a composite node. In your case you could either have classes representing unary and binary operations or have separate classes for each operation. The second option would look something like: interface Term { double getValue();...
UML - association or aggregation (simple code snippets)
uml,associations,aggregation,class-diagram,diagramming
This question has been, and will be, asked many times in many different variants, because many people, including many high-profile developers, are confused about the meaning of these terms, which have been defined in the UML. Since the question has been asked many times, it has also been answered many...
Are my class diagrams Correct?
Please refer to VP's support page, Creating class diagrams. First create the StrongSignalFilter class, then click its Aggregation -> Class resource beside it and drag to empty space of the diagram to create the ReadOutputFileforBreastAndColonCancer class. Next create the WeakSignalFilter class. Finally the crucial step: click the Aggregation -> Class...
How can you properly model nested set in UML?
sql,uml,class-diagram,nested-sets
Here is a class diagram that represents the situation: Compositions are used to reflect the fact, that if a Directory is deleted, all its contents (subdirectories and siles) are automatically also deleted....
Converting ERD to class diagram
Circle means that lower bound of the corresponding association end multiplicity is 0 (Product can be associated with 0 or more Items). Receipt is a so called association class, a hybrid between association and class. It is used when a link between two objects (in this case Product an Inventory)...
Ordered Bag in UML
uml,associations,class-diagram
See also: uml-diagrams.org: Multiplicity Element Chapter 7.5.3 "Common Structure → Types and Multiplicity → Semantics → Multiplicities" in www.omg.org/spec/UML/2.5/Beta2 ...
How to distinguish between classes with the same unique identifier in a class diagram?
It's not a good idea to make inbox_id as foreign key in UserInfomation and EmployerInformation, because one user may have numbers of feedbacks, then user information will be duplicated many times. One approach to this problem is using idea of inheritance, meaning that both UserInformation and EmployerInformation inherit from User...
Board Game Implementation in Java
java,implementation,class-diagram
The piece should not decide what its valid moves are, it should only be aware of where it is and how it's capable of moving. It is not responsible for that sort of logic. The board should manage whether or not that's allowed or not (that is, it takes a...
UML-model class affectation
Your question still is in a form that it allows (too) many answers, but I'll try this way. For each of the steps below involve the appropriate stakeholders to take part in the design. Make up your mind what you actually want to do. What is the purpose of the...
Describe associations in class diagram
You must draw two associations between Article and Address. Role of address for the first association is pickup and for the second one is delivery. If handover address is optional, multiplicity of association should have lower bound set to zero and upper bound 1. Pickup Address is multiplicity 1...
Screenshot of Full Screen in Visual Studio 2012
visual-studio,web,uml,class-diagram
if you want to save your complete class diagram as an image, just click somewhere inside the editing pane and press Ctrl+A to select all classes in the diagram. Now you can copy the diagram to clipboard with Ctrl+C and paste it into your favorite image editing program with Ctrl+V...
Hashmap in UML diagram?
Use beacon : Beacon inside the qualifier rectangle and use the String data type as the target type (instead of Employee). The property beaconRoute is the association end name. You don't have to be so literal as to have a Map class in UML--doing that loses sight of the problem...
Abstract/concrete class separation at sequence diagram
uml,class-diagram,sequence-diagram
In your sequence diagram you should only use objects of the types you know them to be at that particular point in execution. Then you call the method on that object, even if it is a method implemented on the abstract parent class. Sequence diagrams are very much like code...
Representing a class diagram using protege
sparql,ontology,class-diagram,protege
To say that an instance of Faculty teaches at exactly one University, you'd use a property restriction and a subclass axiom: (1) Faculty SubClassOf (teachesAt exactly 1 University) To say that at least one instance of Faculty teaches at every University, you'd use another peoperty restriction and a subclass axiom, but...
Is class diagram required to change if DB contains Views on tables?
database,oop,dao,class-diagram
If I understand the question correctly; you can create a GroupContactDAOImpl class that has only query (get) methods, e.g. getGroupContacts(groupId) or getAllGroupContacts() if you will. Since "group contacts" is not an entity that has its own table, UserContactDAOImpl.addContact and UserGroupDAOImpl.addGroup methods would be sufficient to add new records. If I...
Laravel MVC application structure on UML class diagram
php,laravel,model-view-controller,uml,class-diagram
You can simply present a view as a class. Dialog elements can be shown as attributes having types that can be either simple strings (for input fields) or other classes that represent e.g. drop down. Edit Your diagram looks ok. Just add the attributes for the view like +email:Text +password:HiddenText...
UML class-diagram double association between classes
associations,uml,class-diagram
In fact to model "a double association", I would use two associations which are useful to speficy a different role for each association as depicted below .
UML Is it possible to use Aggregation and Composition with two classes?
java,associations,uml,class-diagram
It's correct way to show assocation, but it's example of bad style app architecture. One of principles of good style architecture is loose coupling. You can read here about it: what is the difference between loose coupling and tight coupling in object oriented paradigm?
generating class diagram from existing classes in eclipse IDE
Objectaid works for me info http://blog.nelsondev.net/?p=93 install it from http://www.objectaid.com/...
Are field types in class diagram obligatory?
language-agnostic,uml,class-diagram
TL;DR You can omit the type and it is not obligatory, sometimes you even don't know the exact types or you just don't care, e.g. in uml-diagrams.org: Library Domain Model, UML Class Diagram Example UML 2.4.1 Infrastructure specification says: ...10.2.5 Property ...A property is a typed element that represents an...
How to represent visual studio embedded classes in a class diargam
In such cases I use stereotypes like <<directory>>, <<button>> etc. to make the use of the class more clear. The relation between your classes should be normal associations. You could use composition for windows that are composed of buttons, fields, etc. The following shows two different button types which inherit...
about constraints in class diagram
I would use a qualifier to express that given a date, there will be zero or one Thesis Defence. That looks like an extra rectangle on the Member end of the association containing the string "defence date : DateTime" and a multiplicity of [0..1] on the other end. Please see...
Can association lines be merged in one line in UML?
uml,software-design,class-diagram,relationships
Yes, I think this is allowed as a notational variant, which implies that all association ends that participate in the merger, have the same properties (e.g. the same multiplicity, navigability, visibility, etc.). Figure 11.34 in the UML 2.5 spec shows an example of such a merged association end sharing the...