/**
* Check that the set of <code>LocalInstance</code>s <code>localsUsed</code>, which is the set of
* locals used in the inner class declared by <code>cb</code> are initialized before the class
* declaration.
*/
protected void checkLocalsUsedByInnerClass(
FlowGraph graph, ClassBody cb, Set localsUsed, DataFlowItem dfIn, DataFlowItem dfOut)
throws SemanticException {
for (Iterator iter = localsUsed.iterator(); iter.hasNext(); ) {
LocalInstance li = (LocalInstance) iter.next();
MinMaxInitCount initCount = (MinMaxInitCount) dfOut.initStatus.get(li);
if (!currCBI.localDeclarations.contains(li)) {
// the local wasn't defined in this scope.
currCBI.outerLocalsUsed.add(li);
} else if (initCount == null || InitCount.ZERO.equals(initCount.getMin())) {
// initCount will in general not be null, as the local variable
// li is declared in the current class; however, if the inner
// class is declared in the initializer of the local variable
// declaration, then initCount could in fact be null, as we
// leave the inner class before we have performed flowLocalDecl
// for the local variable declaration.
throw new SemanticException(
"Local variable \""
+ li.name()
+ "\" must be initialized before the class "
+ "declaration.",
cb.position());
}
}
}
/**
* Check that each static final field is initialized exactly once.
*
* @param cb The ClassBody of the class declaring the fields to check.
* @throws SemanticException
*/
protected void checkStaticFinalFieldsInit(ClassBody cb) throws SemanticException {
// check that all static fields have been initialized exactly once.
for (Iterator iter = currCBI.currClassFinalFieldInitCounts.entrySet().iterator();
iter.hasNext(); ) {
Map.Entry e = (Map.Entry) iter.next();
if (e.getKey() instanceof FieldInstance) {
FieldInstance fi = (FieldInstance) e.getKey();
if (fi.flags().isStatic() && fi.flags().isFinal()) {
MinMaxInitCount initCount = (MinMaxInitCount) e.getValue();
if (InitCount.ZERO.equals(initCount.getMin())) {
throw new SemanticException(
"field \"" + fi.name() + "\" might not have been initialized", cb.position());
}
}
}
}
}