org.activemath.content.mediator.kbimpl
Class ExerciseRepositoryCaller

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

public class ExerciseRepositoryCaller
extends KBCaller

Connects the ExerciseRepository to the Mediator. A URL of the Ex.Rep. looks like: mathdox://workplace/klett/Sippel/uebung_01. This class does only work with xml-rpc 2! And the class AuthenticationManager uses a method, which is only in xml-rpx 1 and not in 2.

Field Summary

protected static boolean

DEBUG

Constructor Summary

ExerciseRepositoryCaller(String url, String user, String password)

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.
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) We return a set with the single String "exercise" in it because we only have exercises in the exercise repository
Set	queryProperty(String item) Returns a Set of lists, where each list comprises two elements: [attribute,value].
Set	queryRelation(String rel, String item) Currently, this method returns the set of all exercises there are in the repository iff the incoming item is a definition of the derivative.
Set	queryRelation(String rel, String item, String c) 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

ExerciseRepositoryCaller

public ExerciseRepositoryCaller(String url,
                                String user,
                                String password)
                         throws KBCallerException

Parameters:

url -

Throws:

KBCallerException

Method Detail

queryClass

public Set queryClass(String item)

We return a set with the single String "exercise" in it because we only have exercises in the exercise repository

Specified by:

queryClass in class KBCaller

Returns:

a set of Strings

See Also:

KBCaller.queryClass(java.lang.String)

queryRelation

public Set queryRelation(String rel,
                         String item)

Currently, this method returns the set of all exercises there are in the repository iff the incoming item is a definition of the derivative. If it is not, an empty set is returned.

Specified by:

queryRelation in class KBCaller

Returns:

a set of Strings

See Also:

KBCaller.queryRelation(java.lang.String, java.lang.String)

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

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.

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.

queryRelation

public Set queryRelation(String rel,
                         String item,
                         String c)

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