private void visitCauses(Throwable t, TreeVisitor<? super Throwable> visitor) {
if (t instanceof MultiCauseException) {
MultiCauseException multiCauseException = (MultiCauseException) t;
List<? extends Throwable> causes = multiCauseException.getCauses();
if (!causes.isEmpty()) {
visitor.startChildren();
for (Throwable cause : causes) {
visitor.node(cause);
if (cause.getClass().getAnnotation(Contextual.class) != null) {
visitCauses(cause, visitor);
}
}
visitor.endChildren();
}
return;
}
if (t.getCause() != null) {
visitor.startChildren();
Throwable next = findNearestContextualCause(t);
if (next != null) {
// Show any contextual cause recursively
visitor.node(next);
visitCauses(next, visitor);
} else {
// Show the direct cause of the last contextual cause.
visitor.node(t.getCause());
}
visitor.endChildren();
}
}
/** Visits the reportable causes for this failure. */
public void visitReportableCauses(TreeVisitor<? super Throwable> visitor) {
visitor.node(this);
visitCauses(target, visitor);
}
public void explain(TreeVisitor<? super String> visitor) {
visitor.node(message);
}