kryo

Type Members

1. class KryoBufferSimpleFeature extends SimpleFeature

   

2. trait KryoFeatureSerializer extends KryoFeatureSerialization with KryoFeatureDeserialization

   

   Kryo feature serialization and deserialization.

   Kryo feature serialization and deserialization.

   The current serialization scheme (version 3):

   • one byte containing the serialization version (3)
   • two bytes for a short containing the number of serialized attributes. this supports appending attributes to the schema, as we know how many attributes were written when deserializing
   • one byte for the size of the stored offsets, which will currently be either 2 (for shorts) or 4 (for ints)
   • a known number of bytes for metadata, which consists of:
   • 2 byte short or 4 byte int (determined by the size as stored above) per attribute for the offset to the start of the attribute in the serialized bytes
   • 2 byte short or 4 byte int (determined by the size as stored above) for the offset to the start of the user data (or end of the feature if no user data)
   • 4 bytes per 32 attributes (or part thereof) to store a bitset tracking null attributes
   • the feature id as a string (if withId)
   • the serialized attributes, in order
   • the serialized user data (if withUserData)

3. case class Metadata(input: Input, count: Int, size: Int, offset: Int, nulls: IntBitSet) extends Product with Serializable

   

   Metadata for serialized simple features

   Metadata for serialized simple features

   input

   kryo input

   count

   number of attributes serialized in this feature (may be less than the current sft)

   size

   size of each offset - either 2 or 4 bytes

   offset

   attribute positions are stored relative to this offset into the serialized bytes

   nulls

   null bit set

4. class ProjectingKryoFeatureDeserializer extends SimpleFeatureSerializer

   

   Deserialize and project to a new feature type

5. class ProjectingKryoFeatureSerializer extends SimpleFeatureSerializer

   

   Project to a subtype when serializing