QueryWhereBuilder.java

public class QueryWhereBuilder<T,U>  {
    private final Map<String, Object> whereTerms = new HashMap<>();
    private final QueryBuilder<T, U> qb;

    public QueryWhereBuilder(QueryBuilder<T,U> qb) {
        this.qb = qb;
    }

    public void add(String key, Object val) {
        whereTerms.put(key, val);
    }

    public void build() throws SQLException {
        if (whereTerms.isEmpty()) {
            return;
        }

        Where<T, U> where = qb.where();
        boolean first = true;
        for (final String key : whereTerms.keySet()) {
            if (!first) {
                where.and();
            }
            where.eq(key, whereTerms.get(key));
            first = false;
        }
    }
}