org.apache.ambari.server.controller.internal

Class SchemaImpl

java.lang.Object

org.apache.ambari.server.controller.internal.SchemaImpl

All Implemented Interfaces:

Schema

public class SchemaImpl
extends Object
implements Schema

Simple schema implementation.

Constructor Summary

Constructors

Constructor and Description
SchemaImpl(ResourceProvider resourceProvider) Create a new schema for the given providers.

Method Summary

Modifier and Type	Method and Description
String	getKeyPropertyId(Resource.Type type) Get the property id for the property that uniquely identifies the given resource type for the resource described by this schema.
Set<Resource.Type>	getKeyTypes() Get the set of resource types used in the key that uniquely identifies the resource type described by this schema.

Methods inherited from class java.lang.Object

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

Constructor Detail

SchemaImpl

public SchemaImpl(ResourceProvider resourceProvider)

Create a new schema for the given providers.

Parameters:

resourceProvider - the resource provider

Method Detail

getKeyPropertyId

public String getKeyPropertyId(Resource.Type type)

Description copied from interface: Schema

Get the property id for the property that uniquely identifies the given resource type for the resource described by this schema.

For example, the resource 'HostComponent' is uniquely identified by its associated 'Cluster', 'Host' and 'Component' resources. Passing the 'Host' resource type to this method on a schema object of a 'HostComponent' resource will return the id of the property of the foreign key reference from the 'HostComponent' to the 'Host'.

Specified by:

getKeyPropertyId in interface Schema

Parameters:

type - the resource type

Returns:

the key property id for the given resource type

getKeyTypes

public Set<Resource.Type> getKeyTypes()

Description copied from interface: Schema

Get the set of resource types used in the key that uniquely identifies the resource type described by this schema.

For example, the resource 'HostComponent' is uniquely identified by its associated 'Cluster', 'Host' and 'Component' resources. Calling this method should return a set of those resource types.

Specified by:

getKeyTypes in interface Schema

Returns:

the set of resource types used in the key that uniquely identifies the resource type described by this schema.