org.eclipse.persistence.sdo
Class SDODataGraph

java.lang.Object
  org.eclipse.persistence.sdo.SDODataGraph

All Implemented Interfaces:

DataGraph, java.io.Serializable

public class SDODataGraph
extends java.lang.Object
implements DataGraph

Purpose:A data graph is used to package a graph of data objects along with their metadata, that is, data describing the data. A data graph also contains a change summary which is used to record changes made to the objects in the graph.

See Also:

Serialized Form

Constructor Summary

SDODataGraph(HelperContext helperContext)

Method Summary

SDODataObject	createRootObject(java.lang.String namespaceURI, java.lang.String typeName) Creates a new root data object of the specified type.
SDODataObject	createRootObject(Type type) Creates a new root data object of the specified type.
SDOChangeSummary	getChangeSummary() Returns the change summary associated with this data graph.
SDODataObject	getRootObject() Returns the root data object of this data graph.
SDOType	getType(java.lang.String uri, java.lang.String typeName) Returns the type with the given the URI, or contained by the resource at the given URI, and with the given name.

Methods inherited from class java.lang.Object

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

Constructor Detail

SDODataGraph

public SDODataGraph(HelperContext helperContext)

Method Detail

getRootObject

public SDODataObject getRootObject()

Returns the root data object of this data graph.

Specified by:

getRootObject in interface DataGraph

Returns:

the root data object.

See Also:

DataObject.getDataGraph()

getChangeSummary

public SDOChangeSummary getChangeSummary()

Returns the change summary associated with this data graph.

Specified by:

getChangeSummary in interface DataGraph

Returns:

the change summary.

See Also:

ChangeSummary.getDataGraph()

getType

public SDOType getType(java.lang.String uri,
                       java.lang.String typeName)

Returns the type with the given the URI, or contained by the resource at the given URI, and with the given name.

Specified by:

getType in interface DataGraph

Parameters:

uri - the namespace URI of a type or the location URI of a resource containing a type.

typeName - name of a type.

Returns:

the type with the corresponding namespace and name.

createRootObject

public SDODataObject createRootObject(java.lang.String namespaceURI,
                                      java.lang.String typeName)

Creates a new root data object of the specified type. An exception is thrown if a root object exists.

Specified by:

createRootObject in interface DataGraph

Parameters:

namespaceURI - namespace of the type.

typeName - name of the type.

Returns:

the new root.

Throws:

java.lang.IllegalStateException - if the root object already exists.

See Also:

createRootObject(Type), getType(String, String)

createRootObject

public SDODataObject createRootObject(Type type)

Creates a new root data object of the specified type. An exception is thrown if a root object exists.

Specified by:

createRootObject in interface DataGraph

Parameters:

type - the type of the new root.

Returns:

the new root.

Throws:

java.lang.IllegalStateException - if the root object already exists.

See Also:

createRootObject(String, String)