PlantUML-compatible grammar for object models

An instance can be generated by parsing the Object diagram defined using PlantUML Object Diagram PlantUML Object Diagram .

Let’s see an example with object diagram of the classic library model. The textual object diagram written in PlantUML Syntax is shown below.

@startuml
Object Library {
name: "dummy"
address: "dummy"
}

Object Bookone {
tittle: "not important"
pages: 10
release: 01/01/2001
}

Object Author {
name: "dummy"
email: "dummy@dummy.com"
}

Object Booktwo {
tittle: "not important"
pages: 20
release: 01/01/2001
}

Object Bookthree {
tittle: "not important"
pages: 30
release: 01/01/2001
}

Booktwo --> Author :wrote
Bookthree --> Author :wrote
Bookone --> Author :wrote

Library --> Bookone :has
Library --> Booktwo :has
Library --> Bookthree:has
@enduml

And the object diagram produced by PlantUML is as follows.

To Parse and Load the objects you can create the test case using the following code:

from antlr4 import *
from besser.BUML.notations.od.ODLexer import ODLexer
from besser.BUML.notations.od.ODParser import ODParser
from besser.BUML.notations.od.ODListener import ODListener
def test_number_of_objects():
    od = "path to Object diagram"
    all_objs = []
    input_stream = FileStream(od)
    lexer = ODLexer(input_stream)
    stream = CommonTokenStream(lexer)
    parser = ODParser(stream)
    tree = parser.objectDiagram()
    listener = ODListener(all_objs)
    walker = ParseTreeWalker()
    walker.walk(listener, tree)
    assert ....