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ajermakovics edited this page Nov 15, 2014
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Welcome to the lambda2sql wiki!
Example using Hazelcast IMap:
public static void main( String[] args )
{
Lambda2Sql.init();
HazelcastInstance hz = Hazelcast.newHazelcastInstance();
IMap<Integer, Employee> map = hz.getMap("employees");
map.put(1, new Employee("alice", 30, true, 100));
map.put(2, new Employee("bob", 40, true, 200));
// run a type safe, distributed query. quite readable as well!
Collection<Employee> vals = values(map, e -> e.isActive() && e.getAge() > 30 );
System.out.println(vals.size());
}
static <T> Predicate<?, T> toSqlPred(java.util.function.Predicate<T> p) {
return new SqlPredicate( Lambda2Sql.toSql( p ) );
}
static <T> Collection<T> values(IMap<?, T> map, java.util.function.Predicate<T> p) {
return map.values( toSqlPred(p) );
}