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Questions tagged [metamodel]

Metamodel is a collection of concepts (frames, rules, terms, constraints, models and theories) that are applicable and useful for modeling a predefined class of problems.

A model is an abstraction of phenomena in the real world; a metamodel is yet another abstraction, highlighting properties of the model itself. A model conforms to its metamodel in the way that a computer program conforms to the grammar of the programming language in which it is written.

Metamodeling, or meta-modeling in software engineering and systems engineering among other disciplines, is the analysis, construction and development of the frames, rules, constraints, models and theories applicable and useful for modeling a predefined class of problems.

Metamodeling is usually defines of a collection of concepts within a certain domain.

cf. wikipedia

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Can we use zookeeper to store offset in kafka apache metamodel

Apache MetaModel kafka consumer not working for zookeepers offset storage. I am using Apache MetaModel 5.1 and kafka version 0.10.2.1. I am facing issue with kafka consumer(metamodel internal consumer) as its not consuming any messages from topic my…
Shraddha
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holistic/natural data model - where to find?

How or where do I find a holistic or natural data model? Wikipedia or other/'real' encyclopedias define terms and by doing so relate them to each other (implicitely). In contrast when I create a datamodel for a specific business use case I usually…
Quicker
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JPA cant find Entity meta model even if it is present in code

2018-06-04 16:55:38.821 WARN 10092 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException:…
Hrushikesh Godse
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Using Javers to compute difference using metamodel

Can Javers be used to calculate the differences using class/object like metamodels instead of concrete Java classes? My research so far leads me to believe Javers differences only works on models which are realized as concrete Java…
Ryan Gustafson
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UML Metamodel for associations between diagrams

up until now, I always ignored the UML Metamodel, but now that I've taken a closer look at it, I have a question which isn't answered by the standard books which I have at hand. The Metamodel describes elements and their associations per diagram.…
rdmueller
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Tool support for MOF (Meta Object Facility)

I was looking into OMG's Business Process Definition MetaModel (BPDM) and found the meta-model definition as XMI/CMOF(Complete MOF) file (download here). Now I was looking for any tools that support reading, editing and displaying the MOF file, but…
f3lix
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JPA static metamodel for multiple persistence units

JPA: for the generated static metamodel, for example, @Entity public class Foo { private Long id; } @StaticMetamodel(...) public class Foo_ { public static volatile SingleAttribute id; } If the entity class Foo is in multiple…
eastwater
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JPA Hibernate 5: OneToOne in nested Embeddable causes metamodel issue

I have an entity: @Entity public class Test { @Embedded Content content; // getters setters.. } This contains an embedded class as you can see: @Embeddable public class Content { @OneToOne Person person; @Embedded …
onderbewustzijn
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How to write user defined functions like variance,standard deviation for hive in Apache Metamodel?

I have to perform a query on hive database using apache metamodel.But the functions like variance and standard deviation which are present in the hive are not present in the metamodel. When I am doing a rest API call I am getting the following…
Prog_G
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JPA: user-defined type is a BasicType?

Instances of the type BasicType represent basic types (including temporal and enumerated types). Is a BasicType directly mapping to a database column type? Can any user-defined type be a BasicType? Type |----------------| ManagedType …
eastwater
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How to create a new meta-formalism?

I'm newbie with the using of EMF. I understand the theory of MDA and MDD, and does some practice using Atom3 and AtomPM. I know how to create a meta-model and meta-formalism (meta-meta-model) and how to create transformation rules using the two…
FOLI FODIL
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QueryDSL JPA metamodel

Can you help me, how generate QueryDSL and JPA metamodel together. I try com.mysema.querydsl querydsl-maven-plugin ${querydsl.version} …
LeshaRB
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Acceleo: The generation failed to generate any file

First of all , I am new to Acceleo and the modeling features of eclipse. What I am trying to do is just to create a simple test file. So for starters, I created a main module: comment encoding = UTF-8 /] [module…
makou
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How to define a dynamic constant in ruby?

I'm trying to recreate a case_class (like from Scala) but in Ruby. so I've tried def case_class name Object.const_set name, Class.new {} end but I get: NameError: uninitialized constant ... I have tried to find which method throws that…
FrankIglesias
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Maven generated static metamodels in Hibernate 5.2 not recognized by DAO classes

I have successfully generated metamodels and all metamodel classes are outputted in target/annotations directory. But my problem is that my other classes such as DAOImpl doesn't recognize these metamodel generated classes. Any help please? Here is…
user7041082
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