Package org.mycore.datamodel.classifications2.impl

Class MCRCategLinkServiceImpl

java.lang.Object

org.mycore.datamodel.classifications2.impl.MCRCategLinkServiceImpl

All Implemented Interfaces:

MCRCategLinkService

Direct Known Subclasses:

MCRSolrCategLinkService

public class MCRCategLinkServiceImpl
extends Object
implements MCRCategLinkService

Since:

2.0

Version:

$Revision$ $Date$

Author:

Thomas Scheffler (yagee)

Constructor Summary

Constructors

Constructor	Description
MCRCategLinkServiceImpl()

Method Summary

Modifier and Type	Method	Description
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(MCRCategLinkReference reference)	Delete all links that refer to the given MCRCategLinkReference.
void	deleteLinks(Collection<MCRCategLinkReference> ids)	Delete all links that refer to the given collection of category links.
Collection<MCRCategoryLink>	getLinks(String type)	Returns a collection of all links for the given type.
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>	getLinksFromReference(MCRCategLinkReference reference)	Returns a list of linked categories.
Collection<MCRCategLinkReference>	getReferences(String type)	Return a collection of all category link references for the given type
Collection<String>	getTypes()	Return a collection of all link types.
boolean	hasLink(MCRCategory mcrCategory)	Checks if the category with the given id is liked with an object
Map<MCRCategoryID,Boolean>	hasLinks(MCRCategory category)	Checks if a categories id refered by objects.
boolean	isInCategory(MCRCategLinkReference reference, MCRCategoryID id)	Checks if a given reference is in a specific category.
void	setLinks(MCRCategLinkReference 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 Details

MCRCategLinkServiceImpl

public MCRCategLinkServiceImpl()

Method Details

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

Parameters:

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

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(MCRCategLinkReference reference)

Description copied from interface: MCRCategLinkService

Delete all links that refer to the given MCRCategLinkReference.

Specified by:

deleteLink in interface MCRCategLinkService

Parameters:

reference - an Object ID

See Also:

• MCRCategLinkService.deleteLinks(Collection)

deleteLinks

public void deleteLinks(Collection<MCRCategLinkReference> ids)

Description copied from interface: MCRCategLinkService

Delete all links that refer to the given collection of category links.

Specified by:

deleteLinks in interface MCRCategLinkService

Parameters:

ids - a collection of MCRCategLinkReference

See Also:

• MCRCategLinkService.deleteLink(MCRCategLinkReference)

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, empty Collection when no links exist

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

getLinksFromReference

public Collection<MCRCategoryID> getLinksFromReference(MCRCategLinkReference reference)

Description copied from interface: MCRCategLinkService

Returns a list of linked categories.

Specified by:

getLinksFromReference in interface MCRCategLinkService

Parameters:

reference - reference, e.g. to a MCRObject

Returns:

list of MCRCategoryID of linked categories

setLinks

public void setLinks(MCRCategLinkReference 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:

• MCRCategLinkService.countLinks(MCRCategory, boolean)
• MCRCategLinkService.countLinksForType(MCRCategory, String, boolean)

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

hasLink

public boolean hasLink(MCRCategory mcrCategory)

Description copied from interface: MCRCategLinkService

Checks if the category with the given id is liked with an object

Specified by:

hasLink in interface MCRCategLinkService

Returns:

true if is linked otherwise false

isInCategory

public boolean isInCategory(MCRCategLinkReference reference,
 MCRCategoryID id)

Description copied from interface: MCRCategLinkService

Checks if a given reference is in a specific category.

Specified by:

isInCategory in interface MCRCategLinkService

Parameters:

reference - reference, e.g. to a MCRObject

Returns:

true if the reference is in the category

getReferences

public Collection<MCRCategLinkReference> getReferences(String type)

Description copied from interface: MCRCategLinkService

Return a collection of all category link references for the given type

Specified by:

getReferences in interface MCRCategLinkService

getTypes

public Collection<String> getTypes()

Description copied from interface: MCRCategLinkService

Return a collection of all link types.

Specified by:

getTypes in interface MCRCategLinkService

getLinks

public Collection<MCRCategoryLink> getLinks(String type)

Description copied from interface: MCRCategLinkService

Returns a collection of all links for the given type.

Specified by:

getLinks in interface MCRCategLinkService