net.ontopia.topicmaps.db2tm

Class Context

java.lang.Object

net.ontopia.topicmaps.db2tm.Context

public class Context
extends Object

INTERNAL: Object used to hold contextual information while processing tuples. Note that mapping, relation, topicMap and baseLocator are all required properties.

Field Summary

Fields

Modifier and Type	Field and Description
protected LocatorIF	baseloc
protected TopicMapBuilderIF	builder
protected DeclarationContextIF	dc
protected Set<TopicIF>	dsCandidates
protected Object[]	entityObjects
protected Collection<Object>[]	extents
protected static int	MAX_DSCANDIDATES
protected Collection<Object>	newObjects
protected Collection<Object>	oldObjects
protected Map<Object,List<?>[]>	oldValues
protected QueryProcessorIF	qp
protected Relation	relation
protected RelationMapping	rmapping
protected TopicMapIF	topicmap

Method Summary

Modifier and Type	Method and Description
protected void	characteristicsChanged(TopicIF topic)
void	close()
LocatorIF	getBaseLocator() INTERNAL: Gets the base locator currently in use.
protected TopicMapBuilderIF	getBuilder() INTERNAL: Gets the topic map builder currently in use.
DeclarationContextIF	getDeclarationContext()
protected Object	getEntityObjectById(String id) INTERNAL: Gets the entity object by id
RelationMapping	getMapping() INTERNAL: Gets the relation mapping currently in use.
QueryProcessorIF	getQueryProcessor() INTERNAL: Gets the topic map query processor currently in use.
TopicMapIF	getTopicMap() INTERNAL: Gets the topic map currently in use.
void	loadExtents()
protected void	mergeTopics(TopicIF target, TopicIF source) INTERNAL: Merge two topics.
protected boolean	registerNewObject(Object object) INTERNAL: Register an object as a new topic map object (created by db2tm).
protected void	registerOldFieldValues(Object object, List<?>[] values) INTERNAL: Register the existing field values of an old object.
protected boolean	registerOldObject(Object object) INTERNAL: Register an object as an existing topic map object.
void	removeExtentObjects()
protected void	removeOldValues()
protected Object	reuseOldFieldValue(Object object, int fieldIndex) INTERNAL: Return the existing field values of an old object.
void	setBaseLocator(LocatorIF baseloc) INTERNAL: Sets the current base locator.
protected void	setEntityObject(int ix, Object object) INTERNAL: Sets the current entity object.
void	setMapping(RelationMapping rmapping) INTERNAL: Sets the current relation mapping.
void	setRelation(Relation relation) INTERNAL: Sets the current relation.
void	setTopicMap(TopicMapIF topicmap) INTERNAL: Sets the current topic map.

Methods inherited from class java.lang.Object

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

Field Detail

rmapping

protected RelationMapping rmapping

relation

protected Relation relation

topicmap

protected TopicMapIF topicmap

baseloc

protected LocatorIF baseloc

builder

protected TopicMapBuilderIF builder

qp

protected QueryProcessorIF qp

dc

protected DeclarationContextIF dc

entityObjects

protected Object[] entityObjects

extents

protected Collection<Object>[] extents

newObjects

protected Collection<Object> newObjects

oldObjects

protected Collection<Object> oldObjects

oldValues

protected Map<Object,List<?>[]> oldValues

MAX_DSCANDIDATES

protected static final int MAX_DSCANDIDATES

See Also:

Constant Field Values

dsCandidates

protected Set<TopicIF> dsCandidates

Method Detail

getMapping

public RelationMapping getMapping()

INTERNAL: Gets the relation mapping currently in use.

setMapping

public void setMapping(RelationMapping rmapping)

INTERNAL: Sets the current relation mapping.

setRelation

public void setRelation(Relation relation)

INTERNAL: Sets the current relation.

getTopicMap

public TopicMapIF getTopicMap()

INTERNAL: Gets the topic map currently in use.

setTopicMap

public void setTopicMap(TopicMapIF topicmap)

INTERNAL: Sets the current topic map.

getQueryProcessor

public QueryProcessorIF getQueryProcessor()

INTERNAL: Gets the topic map query processor currently in use.

getDeclarationContext

public DeclarationContextIF getDeclarationContext()

getBaseLocator

public LocatorIF getBaseLocator()

INTERNAL: Gets the base locator currently in use.

setBaseLocator

public void setBaseLocator(LocatorIF baseloc)

INTERNAL: Sets the current base locator.

getBuilder

protected TopicMapBuilderIF getBuilder()

INTERNAL: Gets the topic map builder currently in use. This builder is retrieved from the current topic map, so this is primarily a convenience method.

setEntityObject

protected void setEntityObject(int ix,
                               Object object)

INTERNAL: Sets the current entity object.

getEntityObjectById

protected Object getEntityObjectById(String id)

INTERNAL: Gets the entity object by id

mergeTopics

protected void mergeTopics(TopicIF target,
                           TopicIF source)

INTERNAL: Merge two topics. This method will replace all references to the old topic with references to the new one.

registerOldObject

protected boolean registerOldObject(Object object)

INTERNAL: Register an object as an existing topic map object. The method will return true if this is the first time we've seen it.

registerNewObject

protected boolean registerNewObject(Object object)

INTERNAL: Register an object as a new topic map object (created by db2tm). The method will return true if this is the first time we've seen it.

registerOldFieldValues

protected void registerOldFieldValues(Object object,
                                      List<?>[] values)

INTERNAL: Register the existing field values of an old object.

reuseOldFieldValue

protected Object reuseOldFieldValue(Object object,
                                    int fieldIndex)

INTERNAL: Return the existing field values of an old object.

removeOldValues

protected void removeOldValues()

loadExtents

public void loadExtents()

removeExtentObjects

public void removeExtentObjects()

characteristicsChanged

protected void characteristicsChanged(TopicIF topic)

close

public void close()