org.eclipse.persistence.sdo
Class SDODataGraph

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

public class SDODataGraph
extends java.lang.Object

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.

Constructor Summary

SDODataGraph(HelperContext helperContext)

Method Summary

DataObject	createRootObject(java.lang.String namespaceURI, java.lang.String typeName) Creates a new root data object of the specified type.
DataObject	createRootObject(Type type) Creates a new root data object of the specified type.
ChangeSummary	getChangeSummary() Returns the change summary associated with this data graph.
DataObject	getRootObject() Returns the root data object of this data graph.
Type	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 DataObject getRootObject()

Returns the root data object of this data graph.

Returns:

the root data object.

See Also:

DataObject#getDataGraph

getChangeSummary

public ChangeSummary getChangeSummary()

Returns the change summary associated with this data graph.

Returns:

the change summary.

See Also:

ChangeSummary#getDataGraph

getType

public Type 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.

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 DataObject 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.

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 DataObject createRootObject(Type type)

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

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)