/**
* Constructs a new set of bindings
*
* @param map a map of keys to values. The keys must be drawn from the set of query variables
* @param vars the set of query variables referenced by these bindings
*/
public Bindings(final Map<String, T> map, final Query.QueryVariables vars) {
this.map = map;
int b = 0;
for (String v : map.keySet()) {
int i = vars.indexOf(v);
b |= (1 << i);
}
boundVariables = b;
}
/**
* Finds whether these bindings are compatible with another set of bindings. Two sets of bindings
* are compatible if, for each variable they have in common, they have identical values.
*
* @param other the other set of bindings to test
* @param vars the query variables from which both sets of bindings are drawn
* @return whether these bindings are compatible with the provided bindings
*/
public boolean compatibleWith(final Bindings<T> other, final Query.QueryVariables vars) {
// compare only those bindings for variables shared between the two solutions
int b = boundVariables & other.boundVariables;
String[] a = vars.asArray();
for (String v : a) {
if (0 != (b & 1)) {
if (!map.get(v).equals(other.map.get(v))) {
return false;
}
}
b = b >> 1;
}
return true;
}
