Package io.bytestreams.codec.iso8583

Interface BitmappedFieldSpec<T extends Bitmapped,V>

Type Parameters:
T - the object type (must implement Bitmapped)
V - the field value type
All Superinterfaces:
io.bytestreams.codec.core.FieldSpec<T,V>
public interface BitmappedFieldSpec<T extends Bitmapped,V> extends io.bytestreams.codec.core.FieldSpec<T,V>
A FieldSpec that adds a bitmap bit index and automatic bitmap management.

When FieldSpec.set(Object, Object) is called, the bitmap is automatically updated: non-null values set the bit, null values clear it. The FieldSpec.presence() predicate checks the bitmap bit during encoding and decoding. 


 class IsoMessage extends DataObject implements Bitmapped {
   static final BitmappedFieldSpec<IsoMessage, String> PAN =
       BitmappedFieldSpec.of(2, DataObject.field("pan", panCodec));

   public String getPan() { return get(PAN); }
   public void setPan(String pan) { set(PAN, pan); }
 }

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    bit()
    Returns the bitmap bit index for this field.
    static <T extends Bitmapped, V>
    BitmappedFieldSpec<T,V>
    of(int bit, io.bytestreams.codec.core.FieldSpec<T,V> delegate)
    Wraps a FieldSpec with bitmap management at the given bit index.

    Methods inherited from interface io.bytestreams.codec.core.FieldSpec

    codec, get, name, presence, set

  • Method Details

    • bit

      int bit()
      Returns the bitmap bit index for this field. Must be positive (bits are 1-indexed).
      Returns:
      the bit index, always > 0

    • of

      static <T extends Bitmapped, V> BitmappedFieldSpec<T,V> of(int bit, io.bytestreams.codec.core.FieldSpec<T,V> delegate)
      Wraps a FieldSpec with bitmap management at the given bit index.

      The returned spec delegates to the wrapped spec for get/set, and additionally sets or clears the bitmap bit when a value is set.

      Type Parameters:
      T - the object type (must implement Bitmapped)
      V - the field value type
      Parameters:
      bit - the bitmap bit index
      delegate - the field spec to wrap
      Returns:
      a new BitmappedFieldSpec