Hi Andreas, old friend!
(Andreas helped me a lot with my first steps in ArgoUML more than 7 years ago,
kudos to him!)
> I have a question: do you think it's feasable to use the rules in the
> Java grammar just as hooks and keep the Argo code in a separate file?
> So the java grammar could be updated without adding the entire Argo
> code every time?
Too many hooks required! Significant changes in the structure of the grammar
would lead to changes in that hook interface. I think it's sufficient to keep
all ArgoUML and model specifig code separated in Modeller.java, and let token
specific string manipulations in the grammar.
Here an example of a grammar rule in the original grammar, compared to the
ArgoUML version, which would require 5 hooks (without restructuring), and there
are many of them:
Original:
variableDeclarator
: variableDeclaratorId ('=' variableInitializer)?
;
ArgoUML version:
variableDeclarator[String javadoc, short modifiers, String t]
@init{
String b = "";
String id = null;
int ix;
String trackedSoFar = null;
String vi = null;
}
: vdi=variableDeclaratorId
{
id = $vdi.text;
ix = id.indexOf('[');
if (ix > 0) {
b = id.substring(ix);
id = id.substring(0, ix - 1);
}
}
(
{
if ((parserMode & MODE_REVENG_SEQUENCE) != 0
&& "new".equals(input.LT(2).getText())) {
createdObjectVarName = input.LT(0).getText();
}
}
'='
{
trackedSoFar=getExpression();
if (!isInCompoundStatement())
activateExpressionTracking();
}
vi=variableInitializer
{
expression=getExpression();
if (isInCompoundStatement()) {
activateExpressionTracking();
appendExpression(trackedSoFar);
appendExpression(expression);
} else {
deactivateExpressionTracking();
}
createdObjectVarName = null;
}
)?
{
if (!isInCompoundStatement() && level > 0) {
getModeller().addAttribute(modifiers, t + b, id, vi, javadoc,
(parserMode == MODE_IMPORT_PASS2));
}
if ((parserMode & MODE_REVENG_SEQUENCE) != 0) {
getModeller().addLocalVariableDeclaration(t + b, id);
}
}
;
> I once had a velocity based solution running, where one could edit the
> templates
> to change the generated code. But it was very rough and far from
> complete...
It was always a dream to control the code generation by a template! is there
any chance that someone will build a clean and complete solution from that?
Would make a nice GSOC project, but I won't do it.
Greetings from Berlin,
Thomas
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