com.epimorphics.server.webapi.dsapi

Class ResourceCache

java.lang.Object

com.epimorphics.server.core.ServiceBase

com.epimorphics.server.webapi.dsapi.ResourceCache

All Implemented Interfaces:

Service

public class ResourceCache
extends ServiceBase
implements Service

Caches labels and IDs for resources to avoid having to run the queries each time. Should be configured as a service with instances of a prefix service. The lookups are based on the IDs which in turn are dependent upon the prefix service for stability. Typically there will be only one ResourceCache in use and so a convenience method to return it is supplied.

Author:

Dave Reynolds

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.commons.collections.map.LRUMap	cache
protected static int	MAX_SIZE
protected static String	PREFIX_SERIVCE_PARAM
protected PrefixService	prefixService
protected static ResourceCache	rc

Fields inherited from class com.epimorphics.server.core.ServiceBase

config

Constructor Summary

Constructors

Constructor and Description
ResourceCache()

Method Summary

Methods

Modifier and Type	Method and Description
static ResourceCache	get()
String	idFor(com.hp.hpl.jena.rdf.model.Resource r) Determine a shortname ID to use of the URI.
void	postInit()
com.hp.hpl.jena.rdf.model.Resource	resourceFromID(String id, com.hp.hpl.jena.rdf.model.Model model) Lookup a resource from an ID and ensure it is in the given model (if model is not null).
protected com.hp.hpl.jena.rdf.model.Resource	reverseID(String id, com.hp.hpl.jena.rdf.model.Model model)
ResourceValue	valueFromID(String id) Lookup a value from an ID
Value	valueFromNode(com.hp.hpl.jena.rdf.model.RDFNode node)
ResourceValue	valueFromResource(com.hp.hpl.jena.rdf.model.Resource r)

Methods inherited from class com.epimorphics.server.core.ServiceBase

getFileParam, getNamedService, getRequiredFileParam, getRequiredIntParam, getRequiredParam, init, postPostInit

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.epimorphics.server.core.Service

init, postPostInit

Field Detail

PREFIX_SERIVCE_PARAM

protected static final String PREFIX_SERIVCE_PARAM

See Also:

Constant Field Values

MAX_SIZE

protected static final int MAX_SIZE

See Also:

Constant Field Values

prefixService

protected PrefixService prefixService

rc

protected static ResourceCache rc

cache

protected org.apache.commons.collections.map.LRUMap cache

Constructor Detail

ResourceCache

public ResourceCache()

Method Detail

postInit

public void postInit()

Specified by:

postInit in interface Service

Overrides:

postInit in class ServiceBase

get

public static ResourceCache get()

idFor

public String idFor(com.hp.hpl.jena.rdf.model.Resource r)

Determine a shortname ID to use of the URI.

valueFromID

public ResourceValue valueFromID(String id)

Lookup a value from an ID

resourceFromID

public com.hp.hpl.jena.rdf.model.Resource resourceFromID(String id,
                                                com.hp.hpl.jena.rdf.model.Model model)

Lookup a resource from an ID and ensure it is in the given model (if model is not null).

valueFromResource

public ResourceValue valueFromResource(com.hp.hpl.jena.rdf.model.Resource r)

valueFromNode

public Value valueFromNode(com.hp.hpl.jena.rdf.model.RDFNode node)

reverseID

protected com.hp.hpl.jena.rdf.model.Resource reverseID(String id,
                                           com.hp.hpl.jena.rdf.model.Model model)