Xtend model data access from top level (Code generation)

Question

If I have an Xtext grammar like the one below:

grammar org.xtext.example.mydsl.ServerGeneratorLanguage with org.eclipse.xtext.common.Terminals

generate serverGeneratorLanguage "http://www.xtext.org/example/mydsl/ServerGeneratorLanguage"

Model:
  (types+=Type)*;

Type:
  Server | DomainModel;

Server:
    "SERVER" name=ID "{"
        "CONFIG" "{"
        (Configs+=Config)*
            "}"
  "}";

Config:
    rootConfig | hostNameConfig | portConfig | logConfig | sqldbConfig | resourceConfig;

rootConfig:
    "ROOTDIR" "=" name=ID;

hostNameConfig:
    "HOSTNAME" "=" name=ID;

portConfig:
    "PORT" "=" name=ID;

logConfig:
    "LOG" "=" name=ID;

sqldbConfig:
    "SQLDB" "=" name=ID;

resourceConfig:
    "RESOURCE" "=" name=ID;

DomainModel:
    "DOMAINMODEL" name=ID "{"
        "ENTITYS" "{"
            (Entitys+=Entity)*
        "}"
        "ENTITY_RELATIONSHIP" "{"
            (Relationships+=Relationship)*
        "}" 
    "}";

Entity:
    name=ID "{"
        (Attributes+=Attribute)*
    "}";

Attribute:
    StringAttribute | NumberAttribute | ImageAttribute;

StringAttribute:
    "STRING" name=ID;

NumberAttribute:
    "NUMBER" name=ID;

ImageAttribute:
    "IMAGE" name=ID;

QualifiedName:
    ID ('.' ID)*;

Relationship:
    name=[Attribute|QualifiedName] "->" refName=[Attribute|QualifiedName];

How do I access the name-ID part of each Config object from a higher level than Server. Let me explain:

I want to generate code by collecting data from Server.configs.eClass.name AS WELL AS DomainModel.blahblah.eClass.name. I assume I need to access it from Type, but I can't seem to get there in Xtend.

From Server I can access all the components Server.configs.eClass.name.

Thank you for the help.

A.H. A.H. · Accepted Answer · 2013-03-22T07:41:21

The automatic model inferrer of Xtext should push common features (like 'name' in your case) up the inheritance hierarchy. When it does not do this, you should check:

Does each Config have a name feature? Are they the same type? Check this in your grammar.
Do RootConfig, HostConfig etc. derive from Config? Check this in the generated classes.

Xtend model data access from top level (Code generation)

1 Answers