gudusoft.gsqlparser.catalog.runtime

Class InMemoryCatalogProvider

Object

gudusoft.gsqlparser.catalog.runtime.InMemoryCatalogProvider

All Implemented Interfaces:

CatalogProvider, AutoCloseable

public final class InMemoryCatalogProvider
extends Object
implements CatalogProvider

Reference CatalogProvider implementation for tests, demos, and the in-memory fixture path. Backed by an InMemoryCatalogSnapshot.

Plan §6 / §7.2. snapshot(CatalogQuery) ignores the query's narrowing options — the in-memory snapshot is fully materialized — and returns the same instance on every call until close() is invoked. refresh(CatalogQuery) forwards to the seed CatalogProviderConfig when present (the eager case) or returns the existing snapshot (the test-fixture case).

Lifecycle: open(CatalogProviderConfig) accepts a config carrying a "snapshot" property whose value is the CatalogSnapshot to serve; alternatively, a snapshot can be installed at construction time via InMemoryCatalogProvider(CatalogSnapshot).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	InMemoryCatalogProvider.Factory ServiceLoader-discoverable factory.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONFIG_SNAPSHOT Property key used by open(CatalogProviderConfig) to receive the seed snapshot.

Constructor Summary

Constructors

Constructor and Description
InMemoryCatalogProvider()
InMemoryCatalogProvider(CatalogSnapshot snapshot)

Method Summary

Modifier and Type	Method and Description
void	close()
CatalogProviderId	id()
void	open(CatalogProviderConfig config)
CatalogSnapshot	refresh(CatalogQuery query) Force a fresh fetch bypassing any internal caches.
CatalogSnapshot	snapshot(CatalogQuery query)

Methods inherited from class Object

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

Field Detail

CONFIG_SNAPSHOT

public static final String CONFIG_SNAPSHOT

Property key used by open(CatalogProviderConfig) to receive the seed snapshot.

See Also:

Constant Field Values

Constructor Detail

InMemoryCatalogProvider

public InMemoryCatalogProvider()

InMemoryCatalogProvider

public InMemoryCatalogProvider(CatalogSnapshot snapshot)

Method Detail

id

public CatalogProviderId id()

Specified by:

id in interface CatalogProvider

open

public void open(CatalogProviderConfig config)
          throws CatalogException

Specified by:

open in interface CatalogProvider

Throws:

CatalogException

snapshot

public CatalogSnapshot snapshot(CatalogQuery query)
                         throws CatalogException

Specified by:

snapshot in interface CatalogProvider

Throws:

CatalogException

refresh

public CatalogSnapshot refresh(CatalogQuery query)
                        throws CatalogException

Description copied from interface: CatalogProvider

Force a fresh fetch bypassing any internal caches.

Specified by:

refresh in interface CatalogProvider

Throws:

CatalogException

close

public void close()
           throws CatalogException

Specified by:

close in interface CatalogProvider

Specified by:

close in interface AutoCloseable

Throws:

CatalogException