public static int hashCode(Key key) {
final int prime = 31;
int result = 1;
for (int i = 0; i < key.size(); i++) {
result = prime * result + hashCode(key.valueAt(i));
}
return result;
}
public static boolean equals(Key a, Object other) {
if (other == null || !(other instanceof Key)) {
return false;
}
Key b = (Key) other;
if (a.size() != b.size()) {
return false;
}
for (int i = 0; i < a.size(); i++) {
if (!equals(a.valueAt(i), b.valueAt(i))) {
return false;
}
}
return true;
}
public static String toString(Key k) {
StringBuilder sb = new StringBuilder();
sb.append("{");
for (int i = 0; i < k.size(); i++) {
if (i > 0) {
sb.append(", ");
}
sb.append(k.fieldAt(i).getName());
sb.append("=");
sb.append(k.valueAt(i));
}
sb.append("}");
return sb.toString();
}