org.activemath.content.mediator.kbimpl
Class MBaseCaller

java.lang.Object
  org.activemath.content.mediator.KBCaller
      org.activemath.content.mediator.kbimpl.MBaseCaller

public class MBaseCaller
extends KBCaller

Field Summary

protected static boolean

DEBUG

Constructor Summary

MBaseCaller(MBaseRef mb)

Method Summary

String	getContent(String uri) Returns the whole content of the learning object corresponding to the given uri.
String	getMappingURL() Returns the URL of the mapping file.
List	getMetadata(String uri) currently not used Currently, only the title of the given Learning Object is returned.
String	getName() Each KBCaller has name, which can be returned by this method.
String	getOntologyURL() Returns the URL of the owl-file which specifies the metadata structure of the kb.
String	getUniqueURIPrefix() Returns a unique prefix of the URIs belonging to this repository.
Set	queryClass(String item) Returns the set of class labels the given item belongs to.
Set	queryProperty(String item) Returns a Set of lists, where each list comprises two elements: [attribute,value].
Set	queryProperty(String item, String learningContext) We introduce this method to handle the 2dimenional properties which are dependent on the learning context.
Set	queryRelation(String relation, String item) Returns the set of all items x for which holds: x rel item.
Set	queryRelation(String relation, String item, String coverage) Returns the set of all items x for which holds: x rel item.

Methods inherited from class org.activemath.content.mediator.KBCaller

getOIOMapping, getOntologyModel, optimizeKBQuery, setOIOMapping, setOntologyModel

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

protected static final boolean DEBUG

Constructor Detail

MBaseCaller

public MBaseCaller(MBaseRef mb)

Method Detail

queryClass

public Set queryClass(String item)

Description copied from class: KBCaller

Returns the set of class labels the given item belongs to.

Specified by:

queryClass in class KBCaller

Returns:

a set of Strings

queryRelation

public Set queryRelation(String relation,
                         String item,
                         String coverage)

Description copied from class: KBCaller

Returns the set of all items x for which holds: x rel item. E.g. queryRelation(function, is_a, en) will return the set {even function, odd function, ...}. Additionally, when a symbol has several definitions with different coverages, then the definition with the coverage c is selected.

Specified by:

queryRelation in class KBCaller

Returns:

a set of Strings

queryRelation

public Set queryRelation(String relation,
                         String item)

Description copied from class: KBCaller

Returns the set of all items x for which holds: x rel item. E.g. queryRelation(function, is_a) will return the set {even function, odd function, ...}

Specified by:

queryRelation in class KBCaller

Returns:

a set of Strings

queryProperty

public Set queryProperty(String item)

Description copied from class: KBCaller

Returns a Set of lists, where each list comprises two elements: [attribute,value]. The set contains the metadata specification of the given item.

Specified by:

queryProperty in class KBCaller

Returns:

a Set of Lists

queryProperty

public Set queryProperty(String item,
                         String learningContext)

We introduce this method to handle the 2dimenional properties which are dependent on the learning context. This method returns a set of property-value pairs. Each of those pairs has either no learning context defined, or the defined learningcontext is the same as the one given to this method.

Parameters:

item -

learningContext -

Returns:

a set of property-value pairs

getName

public String getName()

Description copied from class: KBCaller

Each KBCaller has name, which can be returned by this method.

Specified by:

getName in class KBCaller

Returns:

The Name of the KBCaller.

getOntologyURL

public String getOntologyURL()

Description copied from class: KBCaller

Returns the URL of the owl-file which specifies the metadata structure of the kb.

Specified by:

getOntologyURL in class KBCaller

Returns:

a Sting determining URL.

getMappingURL

public String getMappingURL()

Description copied from class: KBCaller

Returns the URL of the mapping file. A mapping file specifies the correspondence of metadata concepts between the Ontology of Instructional Objects and the metadata ontology describing the metadata structure of a KBCaller.

Specified by:

getMappingURL in class KBCaller

Returns:

a String determining the mapping's URL.

getUniqueURIPrefix

public String getUniqueURIPrefix()

Description copied from class: KBCaller

Returns a unique prefix of the URIs belonging to this repository. E.g. returning "mbase://" will let the mediator access this KBCaller in order to retrieve the metadata or the content of a certain Learning object.

Specified by:

getUniqueURIPrefix in class KBCaller

Returns:

a String denoting the unique string each URI of a learning object belonging to this repository caller starts with.

getMetadata

public List getMetadata(String uri)

currently not used Currently, only the title of the given Learning Object is returned. One pair (i.e., list) for each language in the resultList: [title_de,deutscher Titel],[title_en,english title],...

See Also:

org.activemath.content.mediator.KBCaller#getMetadata(java.lang.String)

getContent

public String getContent(String uri)

Description copied from class: KBCaller

Returns the whole content of the learning object corresponding to the given uri. Use this method to fetch a whole learning object from a foreign repository.

Specified by:

getContent in class KBCaller

Returns:

the whole body of a learning object as String.