class abstract

Abstract persister for GpcEfficient. Child classes should be created for specific children of GpcEfficient, providing overriddes for methods/properties like supportedType and signatureAndVersion.

Inheritance

Implementers

Constructors

chunkSize → int: Approximate number of bytes to use as chunk size when reading/writing. After some basic testing settled on about 4 MB chunks, since some performance checks with 1M GpsPoint in a GpcCompactGpsPoint showed less than 15% performance improvements if huge chunk sizes are allowed that fit the whole list in one go.
final
hashCode → int: The hash code for this object.
no setterinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
signature → String: Returns the signature string for this Persister.
no setterinherited
signatureAndVersion → SignatureAndVersion: Override in children to indicate the signature of this class (used to recognize when reading a file which persister to initialize) and which version is written. The version should be increased if for example new fields get persisted. In that case, the reader must contain compatibility code for reading older versions.
no setterinherited
supportedType → Type: Indicates what object type this Persister can persist, to be overridden in child classes.
no setterinherited
version → int: Indicates the version of the persistence method.
no setterinherited

getMetadata(GpsPointsView<GpsPoint> view) → ByteData?: Allows writing up to Persistence.maxMetadataLength bytes of extra information in the file header. Override in children if needed.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
readViewFromStream(GpsPointsView<GpsPoint> view, StreamReaderState source, int version, ByteData metadata) → Future<void>: Overwrites the contents of view (if it is not read-only) with the information fom the source. version and metadata indicate the additional information that was read from the block header in the file, and may be used to e.g. convert old formats to new.
override
signatureFromString(String sig) → String: Makes sure that the specified sig, if too short, is extended to be of valid signature length.
inherited
signatureFromType(Type type) → String: Creates a default signature from the type. This should be used carefully, since changing the name of the supportedType class in a refactoring can lead to stored files becoming incompatible.
inherited
toString() → String: A string representation of this object.
inherited
writeViewToStream(GpsPointsView<GpsPoint> view) → Stream<List<int>>: Converts view to a Stream of bytes. Override in children.
override