org.mycore.datamodel.classifications2.impl
Class MCRCategLinkServiceImpl

java.lang.Object
  org.mycore.datamodel.classifications2.impl.MCRCategLinkServiceImpl

All Implemented Interfaces:

MCRCategLinkService

public class MCRCategLinkServiceImpl
extends Object
implements MCRCategLinkService

Since:

2.0

Version:

$Revision: 15422 $ $Date: 2009-07-01 10:48:51 +0200 (Wed, 01 Jul 2009) $

Author:

Thomas Scheffler (yagee)

Constructor Summary

MCRCategLinkServiceImpl()

Method Summary

Map<MCRCategoryID,Number>	countLinks(MCRCategory parent, boolean childrenOnly) Counts links to a collection of categories.
Map<MCRCategoryID,Number>	countLinksForType(MCRCategory parent, String type, boolean childrenOnly) Counts links to a collection of categories.
void	deleteLink(String id) Delete all links that refer to the given Object ID.
void	deleteLinks(Collection<String> ids) Delete all links that refer to the given collection of Object IDs.
Collection<String>	getLinksFromCategory(MCRCategoryID id) Returns a list of linked Object IDs.
Collection<String>	getLinksFromCategoryForType(MCRCategoryID id, String type) Returns a list of linked Object IDs restricted by the specified type.
Collection<MCRCategoryID>	getLinksFromObject(String id) Returns a list of linked categories.
Map<MCRCategoryID,Boolean>	hasLinks(MCRCategory category) Checks if a categories id refered by objects.
void	setLinks(MCRObjectReference objectReference, Collection<MCRCategoryID> categories) Add links between categories and Objects.

Methods inherited from class java.lang.Object

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

Constructor Detail

MCRCategLinkServiceImpl

public MCRCategLinkServiceImpl()

Method Detail

countLinks

public Map<MCRCategoryID,Number> countLinks(MCRCategory parent,
                                            boolean childrenOnly)

Description copied from interface: MCRCategLinkService

Counts links to a collection of categories.

Specified by:

countLinks in interface MCRCategLinkService

Parameters:

parent - a subtree rooted at a MCRCategory for which links should be counted

childrenOnly - if only direct children of category should be queried (query may be more optimized)

Returns:

a Map with MCRCategoryID as key and the number of links as value

countLinksForType

public Map<MCRCategoryID,Number> countLinksForType(MCRCategory parent,
                                                   String type,
                                                   boolean childrenOnly)

Description copied from interface: MCRCategLinkService

Counts links to a collection of categories.

Specified by:

countLinksForType in interface MCRCategLinkService

type - restrict links that refer to object of this type

childrenOnly - if only direct children of category should be queried (query may be more optimized)

Returns:

a Map with MCRCategoryID as key and the number of links as value

deleteLink

public void deleteLink(String id)

Description copied from interface: MCRCategLinkService

Delete all links that refer to the given Object ID.

Specified by:

deleteLink in interface MCRCategLinkService

Parameters:

id - an Object ID

See Also:

MCRCategLinkService.deleteLinks(Collection)

deleteLinks

public void deleteLinks(Collection<String> ids)

Description copied from interface: MCRCategLinkService

Delete all links that refer to the given collection of Object IDs.

Specified by:

deleteLinks in interface MCRCategLinkService

Parameters:

ids - a collection of Object IDs

See Also:

MCRCategLinkService.deleteLink(String)

getLinksFromCategory

public Collection<String> getLinksFromCategory(MCRCategoryID id)

Description copied from interface: MCRCategLinkService

Returns a list of linked Object IDs.

Specified by:

getLinksFromCategory in interface MCRCategLinkService

Parameters:

id - ID of the category

Returns:

Collection of Object IDs

getLinksFromCategoryForType

public Collection<String> getLinksFromCategoryForType(MCRCategoryID id,
                                                      String type)

Description copied from interface: MCRCategLinkService

Returns a list of linked Object IDs restricted by the specified type.

Specified by:

getLinksFromCategoryForType in interface MCRCategLinkService

Parameters:

id - ID of the category

type - restrict links that refer to object of this type

Returns:

Collection of Object IDs

getLinksFromObject

public Collection<MCRCategoryID> getLinksFromObject(String id)

Description copied from interface: MCRCategLinkService

Returns a list of linked categories.

Specified by:

getLinksFromObject in interface MCRCategLinkService

Parameters:

id - Object ID of a linked Object

Returns:

list of MCRCategoryID of linked categories

setLinks

public void setLinks(MCRObjectReference objectReference,
                     Collection<MCRCategoryID> categories)

Description copied from interface: MCRCategLinkService

Add links between categories and Objects. Implementors must assure that ancestor (parent) axis categories are implicit linked by this method.

Specified by:

setLinks in interface MCRCategLinkService

Parameters:

objectReference - reference to a Object

categories - a collection of categoryIDs to be linked to

See Also:

#countLinks(Collection), #countLinksForType(Collection, String)

hasLinks

public Map<MCRCategoryID,Boolean> hasLinks(MCRCategory category)

Description copied from interface: MCRCategLinkService

Checks if a categories id refered by objects.

Specified by:

hasLinks in interface MCRCategLinkService

Parameters:

category - a subtree rooted at a MCRCategory for which links should be counted

Returns:

true if the classification is used