Interface ILuaDataProvider
The C# side of the S-100 Part 9A Lua Portrayal Model host interface for a
single render. A provider bridges a product's dataset (ISO 8211 records for
S-101, GML features for S-131) to the Lua Host* functions, collects
the instructions emitted by HostPortrayalEmit, and resolves feature
references back to their feature-type codes.
public interface ILuaDataProviderRemarks
Providers are stateful and render-scoped: they accumulate emitted instructions in EmittedInstructions as the Lua engine runs. A fresh provider is created per render via Create(MarinerSettings), so the same executor can be reused across renders without shared mutable state.
The S-101 and S-131 providers implement an identical surface over different stores, which is what makes the generic LuaRuleExecutor possible.
Properties
EmittedInstructions
Drawing instructions emitted during portrayal execution.
IReadOnlyList<EmittedInstruction> EmittedInstructions { get; }Property Value
PostLoadScripts
Product-specific Lua scripts that must run after main.lua
loads and before context-parameter initialisation and
PortrayalMain. These are the host-adapter shims (e.g.
HostGetSpatial / HostFeatureGetSpatialAssociations
wrappers) and compatibility patches. The list is executed in order.
IReadOnlyList<string> PostLoadScripts { get; }Property Value
Remarks
Owned by the provider because the shims bridge this provider's host functions into Lua objects; S-131's spatial shim differs from S-101's because its geometry is synthesised from GML.
Methods
GetFeatureTypeCode(string)
Resolves a Lua-side feature reference (the stringified record id passed
to HostPortrayalEmit) to its feature-type code (e.g.
DEPCNT), or null when it cannot be resolved.
Used for per-feature-type telemetry.
string? GetFeatureTypeCode(string featureRef)Parameters
featureRefstring
Returns
RegisterHostFunctions(ILuaContext)
Registers all Host* functions (and any debug table) on the given
Lua context.
void RegisterHostFunctions(ILuaContext lua)Parameters
luaILuaContext