Contrained ada type in java

["Ed Trubia" <edward.b.trubia@lmco.com>]

Have the following type that applies contraints. How could this be easily
coded in Java

    type        ET_ACTIVE_PORT_CONFIGURATION  is
        ( HDX_TX1_RX1,
          HDX_TX2_RX2,
          HDX_TX1_RX2,
          HDX_TX2_RX1,
          FDX_TX1_RX2,
          FDX_TX2_RX1);

    for         ET_ACTIVE_PORT_CONFIGURATION use
        ( HDX_TX1_RX1 => 62,
          HDX_TX2_RX2 => 23,
          HDX_TX1_RX2 => 34,
          HDX_TX2_RX1 => 45,
          FDX_TX1_RX2 => 54,
          FDX_TX2_RX1 => 61);