com.google.cloud.spanner.hibernate.schema

Class TableDependencyTracker

java.lang.Object

com.google.cloud.spanner.hibernate.schema.TableDependencyTracker

public class TableDependencyTracker
extends Object

Tracks the order in which tables should be processed (created/dropped) by Hibernate.

In Spanner, interleaved tables must be created or dropped in the correct order. For example, one must create a parent table before its interleaved table. And one must drop the interleaved table first before its parent table.

Constructor Summary

Constructors

Constructor and Description
TableDependencyTracker()

Method Summary

Modifier and Type	Method and Description
Collection<org.hibernate.mapping.Table>	getDependentTables(org.hibernate.mapping.Table table) Returns the list of tables that one must process before processing the provided table.
void	initializeDependencies(org.hibernate.boot.Metadata metadata, org.hibernate.tool.schema.Action schemaAction) Initializes the table dependency tracker.

Methods inherited from class java.lang.Object

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

Constructor Detail

TableDependencyTracker

public TableDependencyTracker()

Method Detail

initializeDependencies

public void initializeDependencies(org.hibernate.boot.Metadata metadata,
                                   org.hibernate.tool.schema.Action schemaAction)

Initializes the table dependency tracker.

Parameters:

metadata - the Hibernate metadata

schemaAction - the kind of schema operation being done: {CREATE or DROP}.

getDependentTables

public Collection<org.hibernate.mapping.Table> getDependentTables(org.hibernate.mapping.Table table)

Returns the list of tables that one must process before processing the provided table.

Parameters:

table - The table that you wish to process

Returns:

the ordered ArrayDeque of tables to process before processing table