/**
* Try to get a constant factory
*
* @param a the first node
* @param b the second node
* @param s the node type set
* @return the constant factory
*/
public static final ConstantType getConstantType(
final Node<?> a, final Node<?> b, final NodeTypeSet<?> s) {
NodeType<?, ?> t;
int i;
if (a != null) {
t = a.getType();
if (t instanceof ConstantType) {
return ((ConstantType) t);
}
}
if (b != null) {
t = b.getType();
if (t instanceof ConstantType) {
return ((ConstantType) t);
}
}
if (s != null) {
for (i = s.size(); (--i) >= 0; ) {
t = s.get(i);
if (t instanceof ConstantType) {
return ((ConstantType) t);
}
}
}
return DEFAULT_CONSTANT_TYPE;
}
