public static void collectInfo(ExpressionInfo info, MExpression exp) {
if (!(exp instanceof MCoreExpression)) {
return;
}
MCoreExpression expr = (MCoreExpression) exp;
Expression ref = null;
if (expr.getCoreExpression() instanceof Expression) {
ref = (Expression) expr.getCoreExpression();
} else {
ref = new ReferenceExpression(expr.getCoreExpressionId());
expr.setCoreExpression(ref);
}
ref.collectExpressionInfo(info);
}
public static boolean isVisible(MCoreExpression exp, ExpressionContext eContext) {
Expression ref = null;
if (exp.getCoreExpression() instanceof Expression) {
ref = (Expression) exp.getCoreExpression();
} else {
ref = new ReferenceExpression(exp.getCoreExpressionId());
exp.setCoreExpression(ref);
}
try {
// Creates dependency on a predefined value that can be "poked" by the evaluation
// service
ExpressionInfo info = ref.computeExpressionInfo();
String[] names = info.getAccessedPropertyNames();
for (String name : names) {
eContext.getVariable(name + ".evaluationServiceLink"); // $NON-NLS-1$
}
return ref.evaluate(eContext) != EvaluationResult.FALSE;
} catch (CoreException e) {
trace("isVisible exception", e); // $NON-NLS-1$
}
return false;
}