/**
* Generates the relation field over the model sigs for called relations Must be run before the
* relation constraint is created (otherwise recursive calls will fail)
*
* @return the Alloy field for this relation
* @throws EchoError
* @todo Support for n models
*/
private Field addRelationFields() throws EchoError {
Field field = null;
Decl fst = rootvar2alloydecl.get(relation.getDomains().get(0).getRootVariable().getName());
/*Decl snd = rootvar2alloydecl.get(relation.getDomains().get(1)
.getVariable().getName());*/
try {
Sig s = (Sig) fst.expr.type().toExpr();
for (Field f : s.getFields()) {
if (f.label.equals(AlloyUtil.relationFieldName(relation, dependency.target))) field = f;
}
if (field == null) {
field =
s.addField(
AlloyUtil.relationFieldName(relation, dependency.target),
/*type.setOf()*/ Sig.UNIV.setOf());
}
} catch (Err a) {
throw new ErrorAlloy(
ErrorAlloy.FAIL_CREATE_FIELD,
"Failed to create relation field representation: " + relation.getName(),
a,
Task.TRANSLATE_TRANSFORMATION);
}
return field;
}
/**
* adds to the transformation translator the constraint defining the field of this sub relation
*
* @param fact the constraint defining this relation
* @param field the field representing this sub relation
* @throws EchoError
*/
private void addRelationDef(Expr fact, Field field) throws EchoError {
Decl fst = rootvar2alloydecl.get(relation.getDomains().get(0).getRootVariable().getName());
Decl snd = rootvar2alloydecl.get(relation.getDomains().get(1).getRootVariable().getName());
Func f;
try {
Expr e = field.equal(fact.comprehensionOver(fst, snd));
f = new Func(null, field.label + "def", model_params_decls, null, e);
transformation_translator.addSubRelationDef(f);
} catch (Err a) {
throw new ErrorAlloy(
ErrorAlloy.FAIL_CREATE_FUNC,
"Failed to create sub relation field constraint: " + relation.getName(),
a,
Task.TRANSLATE_TRANSFORMATION);
}
}
/**
* Initializes the variable lists and generates the respective Alloy declarations.
*
* @throws EchoError
* @todo Support fom <code>CollectionTemplateExp</code>
*/
private void initVariableLists() throws EchoError {
Map<EVariable, String> whenvar2model = new HashMap<EVariable, String>();
Map<EVariable, String> sourcevar2model = new HashMap<EVariable, String>();
Map<EVariable, String> targetvar2model = new HashMap<EVariable, String>();
for (EModelDomain dom : relation.getDomains()) {
rootvariables.put(dom.getRootVariable(), dom.getModel().getName());
if (dependency.target.equals(dom)) targetdomain = dom;
else sourcedomains.add(dom);
}
ECondition preCondition = relation.getPre();
if (preCondition != null) whenvar2model = preCondition.getVariables(null);
for (EModelDomain dom : sourcedomains) {
ECondition cond = dom.getCondition();
sourcevar2model.putAll(cond.getVariables(dom.getModel().getName()));
}
for (EVariable x : whenvar2model.keySet()) {
whenvar2model.put(x, sourcevar2model.get(x));
sourcevar2model.remove(x);
}
ECondition temp = targetdomain.getCondition();
targetvar2model = temp.getVariables(targetdomain.getModel().getName());
ECondition postCondition = relation.getPost();
if (postCondition != null)
for (EVariable x : postCondition.getVariables(null).keySet())
if (targetvar2model.get(x) == null) targetvar2model.put(x, null);
for (EVariable x : sourcevar2model.keySet()) {
if (sourcevar2model.get(x) == null) sourcevar2model.put(x, targetvar2model.get(x));
targetvar2model.remove(x);
}
for (EVariable x : whenvar2model.keySet()) {
if (whenvar2model.get(x) == null) whenvar2model.put(x, targetvar2model.get(x));
targetvar2model.remove(x);
}
if (!top)
for (EVariable x : rootvariables.keySet()) {
whenvar2model.remove(x);
targetvar2model.remove(x);
sourcevar2model.remove(x);
}
for (EVariable s : sourcevar2model.keySet()) var2model.put(s.getName(), sourcevar2model.get(s));
for (EVariable s : targetvar2model.keySet()) var2model.put(s.getName(), targetvar2model.get(s));
for (EVariable s : whenvar2model.keySet()) var2model.put(s.getName(), whenvar2model.get(s));
if (!top)
for (EVariable s : rootvariables.keySet()) var2model.put(s.getName(), rootvariables.get(s));
sourcevar2alloydecl =
AlloyUtil.variableListToExpr(sourcevar2model.keySet(), var2varmodel(), modelparam2var);
for (String s : sourcevar2alloydecl.keySet()) var2var.put(s, sourcevar2alloydecl.get(s).get());
targetvar2alloydecl =
AlloyUtil.variableListToExpr(targetvar2model.keySet(), var2varmodel(), modelparam2var);
for (String s : targetvar2alloydecl.keySet()) var2var.put(s, targetvar2alloydecl.get(s).get());
whenvar2alloydecl =
AlloyUtil.variableListToExpr(whenvar2model.keySet(), var2varmodel(), modelparam2var);
for (String s : whenvar2alloydecl.keySet()) var2var.put(s, whenvar2alloydecl.get(s).get());
rootvar2alloydecl =
AlloyUtil.variableListToExpr(rootvariables.keySet(), var2varmodel(), modelparam2var);
if (!top)
for (String s : rootvar2alloydecl.keySet()) var2var.put(s, rootvar2alloydecl.get(s).get());
}