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Questions tagged [class-hierarchy]

Class hierarchy refers to a set of classes and their inter-relationships.

A classification of object types, denoting objects as the instantiations of classes (class is like a blueprint, the object is what is built from that blueprint) inter-relating the various classes by relationships such as "inherits", "extends", "is an abstraction of", "an interface definition".

http://en.wikipedia.org/wiki/Class_hierarchy

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Table per Concrete Class Hierarchy in Hibernate

I have the following Hibernate Mapping, which has to be mapped using the Table per Concrete Class Hierarchy:
melculetz
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Traits vs. abstract classes for code reuse

While working on a project i stumbled across a question relating to the proper way of choosing the correct form of code reuse in terms of traits vs. abstract base classes. I came across the point where i have multiple abstract base classes but can…
Jay
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Use of generics in a final method that returns a value of the same type of its object

Consider the following immutable classes: A B extends A C extends B D extends C ... Class A has a method called process that gets a parameter of type A, and then returns a value of the type of the calling object: public class A { public final…
Marcelo Glasberg
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In this Java class hierarchy, how to use Generics so that type casts are unnecessary?

Suppose I have 2 classes called RealNumber and IntNumber, and a method called plus: public class RealNumber { public S plus(S realNumber) { ... } } public class IntNumber extends…
Marcelo Glasberg
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How to correct implement ICloneable in a tree hierarchy rooted by an abstract class?

Given a tree hierarchy, suppose it is the following: abstract class Person : ICloneable ... sealed class Student : Person ... I want to implement the ICloneable interface. In the Student.Clone method I wish to do something like: { Student…
mdarefull
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Scala package private with duplicate name in package hierarchy

So I understand that in Scala, you can define something private within the scope of a specific package by adding the modifier private[packagename] where packagename is (obviously) the name of the package that you wish the reference to be private…
childofsoong
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How to print current class name with logback?

The following config …
Suzan Cioc
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How to implement or emulate an "abstract" OCUnit test class?

I have a number of Objective-C classes organized in an inheritance hierarchy. They all share a common parent which implements all the behaviors shared among the children. Each child class defines a few methods that make it work, and the parent class…
Quinn Taylor
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Java - Class Hierarchy

I'm relatively new to programming and for one of my classes I have to create a class hierarchy for the following things: Country, State, County, City, Boundary, and River. How would I do this? I think I understand that I cannot use extends because…
user3558214
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Best Way to Organize PHP Class Hierarchy

I've got a somewhat primitive framework I've been using for most of my projects, but a general design issue came to mind that I haven't been able to work out yet. For a given application, should I separate the application-specific class structure…
Wilco
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What design should I use so a class can query one of it's ancestors?

I'm creating an object hierarchy that is representing a table that is draw on a control. My hierarchy looks like this : Table has multiple pages Page has multiple lines Line has multiple cells Cell has multiple glyph I want to have an option (a…
Mathieu Pagé
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Design pattern to use

I want to make the program with the following classes: Class Player, which stores some information about players with get/set functions. Player can be as AttackPlayer, which will have own data with get/set functions. Also Player can be as…
maximus
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Directory structure - file and folder classes should know each other?

I encountered a problem with two classes knowing each other when I was trying to create a directory structure similar to this: Here's my Base class which includes the common elements of File and Folder. Notice that I've left out getters and…
user2032433
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Where to find Java API Class diagrams?

Is there a site where we can find JAVA API class diagrams. It helps to be able to see the class hierarchy (example Exception class hierarchy) in a visual manner. Thanks.
dumptoday
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Programmatically push down "safe" methods in Smalltalk

I want to collect which methods can be safely pushed down from a superclass to a subclass, specifically, when you have only one subclass and there is no reason to maintain the method in the superclass. It could be a matter of dinamically discover…
user869097
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