org.apache.marmotta.kiwi.model.rdf

Class KiWiNode

java.lang.Object

org.apache.marmotta.kiwi.model.rdf.KiWiNode

All Implemented Interfaces:

Serializable, org.openrdf.model.Value

Direct Known Subclasses:

KiWiLiteral, KiWiResource

public abstract class KiWiNode
extends Object
implements org.openrdf.model.Value, Serializable

KiWiNode is the base class of all objects stored in the knowledge base. The relevant subclasses are KiWiResource and KiWiLiteral.

The KiWiNode entity represents common properties of nodes like the creation and modification dates, the creator, and the context. *

Author:

sschaffe

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	KiWiNode()
protected	KiWiNode(Date created)

Method Summary

Methods

Modifier and Type	Method and Description
Date	getCreated() Return the timestamp when this node has been created
long	getId() Return the database ID of this node.
abstract boolean	isAnonymousResource() Return true in case the node is an anonymous resource / BNode (avoids instanceof test)
abstract boolean	isLiteral() Return true in case the node is a literal (avoids instanceof test)
abstract boolean	isUriResource() Return true in case the node is a uri resource (avoids instanceof test)
void	setCreated(Date created) Set the timestamp when this resource has been created
void	setId(long id) Update the database id of the node.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.model.Value

stringValue

Constructor Detail

KiWiNode

protected KiWiNode()

KiWiNode

protected KiWiNode(Date created)

Method Detail

getId

public long getId()

Return the database ID of this node. Can be used to refer to the node in the context of one triple store instance, but should not be exposed outside.

Returns:

the (internal) database id

setId

public void setId(long id)

Update the database id of the node.

Parameters:

id - the id to set

getCreated

public Date getCreated()

Return the timestamp when this node has been created

Returns:

the created

setCreated

public void setCreated(Date created)

Set the timestamp when this resource has been created

Parameters:

created - the created to set

isUriResource

public abstract boolean isUriResource()

Return true in case the node is a uri resource (avoids instanceof test)

Returns:

true if the node is a URI, false otherwise

isAnonymousResource

public abstract boolean isAnonymousResource()

Return true in case the node is an anonymous resource / BNode (avoids instanceof test)

Returns:

true if the node is a blank node, false otherwise

isLiteral

public abstract boolean isLiteral()

Return true in case the node is a literal (avoids instanceof test)

Returns:

true in case the node is a literal, false otherwise