42 lines
No EOL
1.8 KiB
Python
42 lines
No EOL
1.8 KiB
Python
from uuid import UUID
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from transformation.rule import RuleMatcherRewriter
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from transformation.ramify import ramify
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from util.loader import load_rules
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import os
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THIS_DIR = os.path.dirname(__file__)
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# Given a class diagram, extend it (in-place) with a "Top"-type, i.e., an (abstract) supertype of all types. The set of instances of the "Top" is always the set of all objects in the diagram.
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def topify_cd(state, cd: UUID):
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# meta-meta-model
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scd_mmm = UUID(state.read_value(state.read_dict(state.read_root(), "SCD")))
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scd_mmm_ramified = ramify(state, scd_mmm)
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matcher_rewriter = RuleMatcherRewriter(state, scd_mmm, scd_mmm_ramified)
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# topification is implemented via model transformation
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rules = load_rules(state,
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lambda rule_name, kind: f"{THIS_DIR}/rules/r_{rule_name}_{kind}.od",
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scd_mmm_ramified, ["create_top", "create_inheritance"])
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# 1. Execute rule 'create_top' once
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rule = rules["create_top"]
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match_set = list(matcher_rewriter.match_rule(cd, rule.lhs, rule.nacs, "create_top"))
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if len(match_set) != 1:
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raise Exception(f"Expected rule 'create_top' to match only once, instead got {len(match_set)} matches")
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lhs_match = match_set[0]
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cd, rhs_match = matcher_rewriter.exec_rule(cd, rule.lhs, rule.rhs, lhs_match, "create_top")
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# 2. Execute rule 'create_inheritance' as many times as possible
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rule = rules["create_inheritance"]
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while True:
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iterator = matcher_rewriter.match_rule(cd, rule.lhs, rule.nacs, "create_inheritance")
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# find first match, and re-start matching
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try:
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lhs_match = iterator.__next__() # may throw StopIteration
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cd, rhs_match = matcher_rewriter.exec_rule(cd, rule.lhs, rule.rhs, lhs_match, "create_inheritance")
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except StopIteration:
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break # no more matches
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return cd |