org.openanzo.server.repository.structures
Class NamedGraph

java.lang.Object
  org.openanzo.server.repository.structures.NamedGraph

All Implemented Interfaces:

Batchable, CachableResource

public class NamedGraph
extends java.lang.Object
implements Batchable, CachableResource

Provides read and write access to NamedGraph stored in the repository. NamedGraph are named arbitrary groupings of statements that may overlap and subsume each other. NamedGraph data is cached in memory and is not persisted to the repository until commit is called or a batch commit (via the Batchable interface) is performed.

Author:

Joe Betz, Matthew Roy ( mroy@cambridgesemantics.com )

See Also:

Batchable

Nested Class Summary

static class

NamedGraph.Factory Factory to create NamedGraph

Nested classes/interfaces inherited from interface org.openanzo.jdbc.utils.batchable.Batchable

Batchable.BatchGroup, Batchable.BatchOperation, Batchable.BatchOperationSet, Batchable.NullBatch

Field Summary

Fields inherited from interface org.openanzo.jdbc.utils.batchable.Batchable

EMPTY_BATCH

Method Summary

void	commit() Commit changes to the database
static NamedGraph	createNamedGraph(java.lang.Long id, java.lang.Long metaId, java.lang.Long aclId, java.lang.Long timestamp, java.lang.Long createdBy, long revision, RepositoryConnection repositoryConnection, long lastModifiedBy) Create NamedGraph with given properties
java.lang.Long	getAclId() Get the aclid for this graph
java.lang.Long	getCreatedBy() Get id of user that created this NamedGraph
java.lang.Long	getId() Gets the id of the data object.
java.lang.Long	getLastModifiedBy() Get id of user that last modified this NamedGraph
org.openrdf.model.URI	getMetaDataUri() Get the URI of the metadata graph
java.lang.Long	getMetaId() Get the metadata id of namedGraph
java.lang.Long	getModified() Get timestamp when NamedGraph was last modified
long	getRevision() Get the revision of the graph
org.openrdf.model.URI	getURI() Get the URI for this graph
boolean	incrementRevision() Increment the revision of the graph if something changed during current transaction
boolean	isDirty() Has namedGraph changed during current transaction
boolean	isStored() Get if the namedgraph is stored in the database
static boolean	isStored(RepositoryConnection repositoryConnection, java.lang.Long id) Is this NamedGraph stored in database
java.util.List<Batchable.BatchOperation>	listBatchOperations() Get the current list of batch operations for this object
static NamedGraph	loadNamedGraph(java.lang.Long id, RepositoryConnection repositoryConnection) Load a NamedGraph from database
void	remove() Remove the namedgraph from the database
void	setAclId(java.lang.Long aclId) Set the aclid for the graph
void	setCreatedBy(java.lang.Long createdBy) Set id of user that created this NamedGraph
void	setLastModifiedBy(java.lang.Long lastModifiedBy) Set id of user that last modified this NamedGraph
void	setMetaId(java.lang.Long metaId) Set the metaid for the graph
void	setModified(java.lang.Long modified) Set the lastModified timestamp
void	setRevision(long revision) Set the revision for the graph

Methods inherited from class java.lang.Object

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

Method Detail

isStored

public static boolean isStored(RepositoryConnection repositoryConnection,
                               java.lang.Long id)
                        throws AnzoException

Is this NamedGraph stored in database

Parameters:

repositoryConnection - connection to the database

id - id of the NamedGraph

Returns:

true if the NamedGraph is stored in the database

Throws:

AnzoException

loadNamedGraph

public static NamedGraph loadNamedGraph(java.lang.Long id,
                                        RepositoryConnection repositoryConnection)
                                 throws AnzoException

Load a NamedGraph from database

Parameters:

id - id of the NamedGraph

repositoryConnection - connection to the database

Returns:

a NamedGraph object for the provided ID

Throws:

AnzoException

createNamedGraph

public static NamedGraph createNamedGraph(java.lang.Long id,
                                          java.lang.Long metaId,
                                          java.lang.Long aclId,
                                          java.lang.Long timestamp,
                                          java.lang.Long createdBy,
                                          long revision,
                                          RepositoryConnection repositoryConnection,
                                          long lastModifiedBy)
                                   throws AnzoException

Create NamedGraph with given properties

Parameters:

id - ID of namedGraph

metaId - MetadataId of namedGraph

aclId - ACLid of namedGraph

timestamp - Timestamp when namedGraph was modified

createdBy - User that created namedGraph

revision - Revision of namedGraph

repositoryConnection - RepositoryConnection to write data to

lastModifiedBy -

Returns:

a NamedGraph object for the provided data

Throws:

AnzoException

getId

public java.lang.Long getId()

Description copied from interface: CachableResource

Gets the id of the data object. This must be available after the object is loaded, or if it has been created but not presisted, after allocateId() is called.

Specified by:

getId in interface CachableResource

Returns:

Id of the data object

getMetaId

public java.lang.Long getMetaId()

Get the metadata id of namedGraph

Returns:

the metadata id of namedGraph

getMetaDataUri

public org.openrdf.model.URI getMetaDataUri()

Get the URI of the metadata graph

Returns:

the URI of the metadata graph

getURI

public org.openrdf.model.URI getURI()

Get the URI for this graph

Specified by:

getURI in interface CachableResource

Returns:

URI of the data object

getAclId

public java.lang.Long getAclId()

Get the aclid for this graph

Returns:

the acl id for this graph

getRevision

public long getRevision()

Get the revision of the graph

Returns:

the revision of the graph

setAclId

public void setAclId(java.lang.Long aclId)

Set the aclid for the graph

Parameters:

aclId - the aclid for the graph

setMetaId

public void setMetaId(java.lang.Long metaId)

Set the metaid for the graph

Parameters:

metaId - the metaid for the graph

setRevision

public void setRevision(long revision)

Set the revision for the graph

Parameters:

revision - the revision for the graph

incrementRevision

public boolean incrementRevision()

Increment the revision of the graph if something changed during current transaction

Returns:

the revision of the graph if something changed during current transaction

setModified

public void setModified(java.lang.Long modified)

Set the lastModified timestamp

Parameters:

modified - the lastModified timestamp

isStored

public boolean isStored()

Get if the namedgraph is stored in the database

Specified by:

isStored in interface CachableResource

Returns:

true if the namedgraph is stored in the database

remove

public void remove()

Remove the namedgraph from the database

commit

public void commit()
            throws RdbException

Commit changes to the database

Throws:

RdbException

listBatchOperations

public java.util.List<Batchable.BatchOperation> listBatchOperations()

Description copied from interface: Batchable

Get the current list of batch operations for this object

Specified by:

listBatchOperations in interface Batchable

Returns:

the current list of batch operations for this object

isDirty

public boolean isDirty()

Has namedGraph changed during current transaction

Returns:

true if the namedGraph changed during current transaction

getCreatedBy

public java.lang.Long getCreatedBy()

Get id of user that created this NamedGraph

Returns:

the id of user that created this NamedGraph

setCreatedBy

public void setCreatedBy(java.lang.Long createdBy)

Set id of user that created this NamedGraph

Parameters:

createdBy - id of user that created this NamedGraph

getLastModifiedBy

public java.lang.Long getLastModifiedBy()

Get id of user that last modified this NamedGraph

Returns:

id of user that last modified this NamedGraph

setLastModifiedBy

public void setLastModifiedBy(java.lang.Long lastModifiedBy)

Set id of user that last modified this NamedGraph

Parameters:

lastModifiedBy - id of user that last modified this NamedGraph

getModified

public java.lang.Long getModified()

Get timestamp when NamedGraph was last modified

Returns:

timestamp when NamedGraph was last modified