org.mycore.datamodel.common
Interface MCRLinkTableInterface

All Known Implementing Classes:

MCRHIBLinkTableStore

public interface MCRLinkTableInterface

This interface is designed to choose the persistence for the link tables.

Version:

$Revision: 14986 $ $Date: 2009-03-20 21:41:45 +0100 (Fri, 20 Mar 2009) $

Author:

Jens Kupferschmidt

Method Summary

int	countTo(String fromtype, String to, String type, String restriction) The method count the number of references with '%from%' and 'to' and optional 'type' and optional 'restriction%' values of the table.
void	create(String from, String to, String type, String attr) The method create a new item in the datastore.
void	delete(String from, String to, String type) The method remove a item for the from ID from the datastore.
Map<String,Number>	getCountedMapOfMCRTO(String mcrtoPrefix) The method returns a Map of all counted distinct references
Collection<String>	getDestinationsOf(String from, String type) Returns a List of all link destination of from and a special type
Collection<String>	getSourcesOf(String to, String type) Returns a List of all link sources of to and a special type

Method Detail

create

void create(String from,
            String to,
            String type,
            String attr)

The method create a new item in the datastore.

Parameters:

from - a string with the link ID MCRFROM

to - a string with the link ID MCRTO

type - a string with the link ID MCRTYPE

attr - a string with the link ID MCRATTR

delete

void delete(String from,
            String to,
            String type)

The method remove a item for the from ID from the datastore.

Parameters:

from - a string with the link ID MCRFROM

to - an array of strings with the link ID MCRTO

type - an array of strings with the link ID MCRTYPE

countTo

int countTo(String fromtype,
            String to,
            String type,
            String restriction)

The method count the number of references with '%from%' and 'to' and optional 'type' and optional 'restriction%' values of the table.

Parameters:

fromtype - a substing in the from ID as String, it can be null

to - the object ID as String, which is referenced

type - the refernce type, it can be null

restriction - a first part of the to ID as String, it can be null

Returns:

the number of references

getCountedMapOfMCRTO

Map<String,Number> getCountedMapOfMCRTO(String mcrtoPrefix)

The method returns a Map of all counted distinct references

Parameters:

mcrtoPrefix -

Returns:

the result-map of (key,value)-pairs can be visualized as
select count(mcrfrom) as value, mcrto as key from mcrlinkclass|mcrlinkhref where mcrto like mcrtoPrefix + '%' group by mcrto;

getSourcesOf

Collection<String> getSourcesOf(String to,
                                String type)

Returns a List of all link sources of to and a special type

Parameters:

to - Destination-ID

type - Link reference type, this can be null. Current types are classid, child, parent, reference and derivate.

Returns:

List of Strings (Source-IDs)

getDestinationsOf

Collection<String> getDestinationsOf(String from,
                                     String type)

Returns a List of all link destination of from and a special type

Parameters:

from - Source-ID

type - Link reference type, this can be null. Current types are classid, child, parent, reference and derivate.

Returns:

List of Strings (Destination-IDs)