Constructor.
Optionalmetas: DatumStreamMetadata[]optional list of metadata to start with
Add metadata to the registry.
the metadata to add to the registry
this object
Get the index of the metadata with a specific stream ID.
the stream ID to get the index of
the found index, or -1 if not found
Get the metadata at a specific index, based on insertion order.
the index of the metadata to get
the metadata at the given index, or undefined
Get the first available metadata for a given object and source ID combination.
the object ID of the metadata to get
the source ID of the metadata to get
Optionalkind: DatumStreamTypeoptional kind to get; if not provided the first metadata to match the given objectId
and sourceId will be returned
the associated metadata, or undefined if none available
Get the metadta for a given stream ID.
the stream ID of the metadata to get
the associated metadata, or undefined if none available
Get a set of all available stream IDs.
all available metadata stream ID values
Get a list of all available stream IDs in insertion order.
all available metadata stream ID values in the same order as added to this registry
Get this object as a standard JSON encoded string value.
The returned JSON is an array of the toJsonEncoding() result of all metadata in the registry. An example result looks like this:
[
{
"streamId": "7714f762-2361-4ec2-98ab-7e96807b32a6",
"zone": "Pacific/Auckland",
"kind": "n",
"objectId": 123,
"sourceId": "/power/1",
"i": ["watts", "current", "voltage", "frequency"],
"a": ["wattHours"]
},
{
"streamId": "5514f762-2361-4ec2-98ab-7e96807b3255",
"zone": "America/New_York",
"kind": "n",
"objectId": 456,
"sourceId": "/irradiance/2",
"i": ["irradiance", "temperature"],
"a": ["irradianceHours"]
}
]
the JSON encoded string
StaticfromParse a JSON string into a DatumStreamMetadataRegistry instance.
The JSON must be encoded the same way toJsonEncoding() does.
the JSON to parse
the stream metadata registry instance, or undefined if json is not parsable as one
StaticfromCreate a registry instance from an array parsed from a JSON string of datum stream metadata objects.
The array must be structured in the same way toJsonEncoding() does.
the array data to parse
the stream metadata registry instance, or undefined if data is not a valid array
A registry of datum stream metadata instances for object (node or location) and source ID combinations.
This registry acts like a map of (stream ID) -> metadata as well as (object ID, source ID) -> metadata.