public void visitTryCatchFinally(TryCatchStatement statement) {
statement.getTryStatement().visit(this);
for (CatchStatement catchStatement : statement.getCatchStatements()) {
catchStatement.visit(this);
}
Statement finallyStatement = statement.getFinallyStatement();
if (finallyStatement instanceof EmptyStatement) {
// dispatching to EmptyStatement will not call back visitor,
// must call our visitEmptyStatement explicitly
visitEmptyStatement((EmptyStatement) finallyStatement);
} else {
finallyStatement.visit(this);
}
}
public void visitCatchStatement(CatchStatement statement) {
pushState();
Parameter p = statement.getVariable();
p.setInStaticContext(currentScope.isInStaticContext());
declare(p, statement);
super.visitCatchStatement(statement);
popState();
}
@Override
public void visitTryCatchFinally(final TryCatchStatement statement) {
visitStatement(statement);
Map<Variable, VariableState> beforeTryCatch = new HashMap<Variable, VariableState>(getState());
statement.getTryStatement().visit(this);
for (CatchStatement catchStatement : statement.getCatchStatements()) {
catchStatement.visit(this);
}
Statement finallyStatement = statement.getFinallyStatement();
// we need to recall which final variables are unassigned so cloning the current state
Map<Variable, VariableState> afterTryCatchState =
new HashMap<Variable, VariableState>(getState());
if (finallyStatement instanceof EmptyStatement) {
// dispatching to EmptyStatement will not call back visitor,
// must call our visitEmptyStatement explicitly
visitEmptyStatement((EmptyStatement) finallyStatement);
} else {
finallyStatement.visit(this);
}
// and now we must reset to uninitialized state variables which were only initialized during
// try/catch
Map<Variable, VariableState> afterFinally = new HashMap<Variable, VariableState>(getState());
for (Map.Entry<Variable, VariableState> entry : afterFinally.entrySet()) {
Variable var = entry.getKey();
VariableState afterFinallyState = entry.getValue();
VariableState beforeTryCatchState = beforeTryCatch.get(var);
if (afterFinallyState == VariableState.is_final
&& beforeTryCatchState != VariableState.is_final
&& afterTryCatchState.get(var) != beforeTryCatchState) {
getState()
.put(
var,
beforeTryCatchState == null ? VariableState.is_uninitialized : beforeTryCatchState);
}
}
}
public void visitCatchStatement(CatchStatement statement) {
statement.getCode().visit(this);
}
public void visitCatchStatement(CatchStatement cs) {
if (!(cs.getExceptionType().isDerivedFrom(ClassHelper.make(Throwable.class)))) {
addError("Catch statement parameter type is not a subclass of Throwable.", cs);
}
super.visitCatchStatement(cs);
}