docs: private String buildWhereClause(String[] pKeys, Hashtable pMapping) {
          StringBuilder sqlBuf = new StringBuilder();
  
          for (int i = 0; i < pKeys.length; i++) {
              String column = (String) pMapping.get(pKeys[i]);
              sqlBuf.append(" AND ");
              sqlBuf.append(column);
              sqlBuf.append(" = ?");
          }
  
          return sqlBuf.toString();
  
      }