71 lines
1.7 KiB
Python
71 lines
1.7 KiB
Python
# We reuse our (meta-)model from the previous tutorial. For this tutorial, it doesn't really matter what the models look like.
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mm_cs = """
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MyAbstractClass:Class {
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abstract = True;
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}
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MyConcreteClass:Class
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:Inheritance (MyConcreteClass -> MyAbstractClass)
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Z:Class
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myZ:Association (MyAbstractClass -> Z) {
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target_lower_cardinality = 1;
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}
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"""
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m_cs = """
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cc:MyConcreteClass
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z:Z
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:myZ (cc -> z)
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"""
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# We parse everything:
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from state.devstate import DevState
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from bootstrap.scd import bootstrap_scd
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from util import loader
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state = DevState()
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mmm = bootstrap_scd(state)
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mm = loader.parse_and_check(state, mm_cs, mmm, "mm")
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m = loader.parse_and_check(state, m_cs, mm, "m")
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# We can query the model via an API called ODAPI (Object Diagram API):
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from api.od import ODAPI
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odapi = ODAPI(state, m, mm)
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ls = odapi.get_all_instances("MyAbstractClass", include_subtypes=True)
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print("result of get_all_instances:")
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print(ls)
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# Observing the output above, we see that we got a list of tuples (object_name, UUID).
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# We can also modify the model via the same API:
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(cc_name, cc_id) = ls[0]
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z2 = odapi.create_object("z2", "Z")
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odapi.create_link("lnk", "myZ", cc_id, z2)
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# And we can observe the modified model:
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from concrete_syntax.textual_od.renderer import render_od
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from concrete_syntax.common import indent
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print()
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print("the modified model:")
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print(indent(render_od(state, m, mm, hide_names=False), 2))
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# BTW, notice that the anonymous link of type 'myZ' from the original model was automatically given a unique name (starting with two underscores).
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# The full ODAPI is documented on page 6 of this PDF:
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# http://msdl.uantwerpen.be/people/hv/teaching/MSBDesign/202425/assignments/assignment6.pdf
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# On to the next tutorial...
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