Class BackendFieldFunctionAdapterRegistry

java.lang.Object

com.kingsrook.qqq.backend.core.model.metadata.fields.functions.BackendFieldFunctionAdapterRegistry

public class BackendFieldFunctionAdapterRegistry
extends Object

Registry of BackendFieldFunctionAdapterInterface implementations, keyed by function type identifier name. These objects are, by design, stored as properties of QBackendMetaData subclasses (which is why the keys inside the registry are just function identifiers - each backend has 1 adapter implementation per function type).

Backend modules (e.g., RDBMS) register adapters here so that when a query is executed, the appropriate backend-specific adapter can be retrieved by function type identifier to generate the correct SQL or other backend syntax.

Constructor Summary

Constructors

Constructor	Description
BackendFieldFunctionAdapterRegistry()	Constructor

Method Summary

Modifier and Type	Method	Description
BackendFieldFunctionAdapterInterface	getFieldFunctionAdapter(FieldFunctionTypeIdentifier identifier)	Returns an instantiated BackendFieldFunctionAdapterInterface for the given identifier, or null if no adapter is registered.
void	register(FieldFunctionTypeIdentifier identifier, String backendTypeName, QCodeReference adapterCodeReference)	Registers an adapter code reference for the given function type identifier and backend type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BackendFieldFunctionAdapterRegistry

public BackendFieldFunctionAdapterRegistry()

Constructor

Method Details

register

public void register(FieldFunctionTypeIdentifier identifier,
 String backendTypeName,
 QCodeReference adapterCodeReference)

Registers an adapter code reference for the given function type identifier and backend type. Validates that the code reference can be instantiated before registering.

getFieldFunctionAdapter

public BackendFieldFunctionAdapterInterface getFieldFunctionAdapter(FieldFunctionTypeIdentifier identifier)

Returns an instantiated BackendFieldFunctionAdapterInterface for the given identifier, or null if no adapter is registered.