com.epimorphics.lda.sources

Class CombinedSource

java.lang.Object

com.epimorphics.lda.sources.SourceBase

com.epimorphics.lda.sources.CombinedSource

All Implemented Interfaces:

Source

public class CombinedSource
extends SourceBase
implements Source

A combined source is a way of composing data from different endpoints. The combination presents itself as a model which can be queried. The endpoints are specified by SPARQL queries themselves.

Author:

chris

Nested Class Summary

Nested classes/interfaces inherited from interface com.epimorphics.lda.sources.Source

Source.ResultSetConsumer, Source.Util

Field Summary

Fields

Modifier and Type	Field and Description
protected List<String>	constructs
protected com.hp.hpl.jena.shared.Lock	lock
protected List<String>	matches
protected String	name
protected List<Source>	sources

Constructor Summary

Constructors

Constructor and Description
CombinedSource(com.hp.hpl.jena.util.FileManager fm, AuthMap am, com.hp.hpl.jena.rdf.model.Resource ep) ep is a resource of type Combiner.

Method Summary

Methods

Modifier and Type	Method and Description
void	addMetadata(com.hp.hpl.jena.rdf.model.Resource meta) Add metdata describing this source to a metdata model
com.hp.hpl.jena.query.QueryExecution	execute(com.hp.hpl.jena.query.Query query) Each SourceBase subclass must provide execute.
com.hp.hpl.jena.shared.Lock	getLock() Each SourceBase subclass must provide a Lock on demand.
boolean	supportsNestedSelect() Answer TRUE iff this source supports nested SELECT queries (as specified by SPARQL 1.1).
String	toString() Return a name for this source, used for error reporting

Methods inherited from class com.epimorphics.lda.sources.SourceBase

executeConstruct, executeDescribe, executeSelect, getTextSearchConfig

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.epimorphics.lda.sources.Source

executeConstruct, executeDescribe, executeSelect, getTextSearchConfig

Field Detail

sources

protected final List<Source> sources

matches

protected final List<String> matches

constructs

protected final List<String> constructs

name

protected String name

lock

protected final com.hp.hpl.jena.shared.Lock lock

Constructor Detail

CombinedSource

public CombinedSource(com.hp.hpl.jena.util.FileManager fm,
              AuthMap am,
              com.hp.hpl.jena.rdf.model.Resource ep)

ep is a resource of type Combiner. It has multiple elements, each of which themselves represent sub-sources.

Method Detail

getLock

public com.hp.hpl.jena.shared.Lock getLock()

Description copied from class: SourceBase

Each SourceBase subclass must provide a Lock on demand.

Specified by:

getLock in class SourceBase

execute

public com.hp.hpl.jena.query.QueryExecution execute(com.hp.hpl.jena.query.Query query)

Description copied from class: SourceBase

Each SourceBase subclass must provide execute.

Specified by:

execute in class SourceBase

toString

public String toString()

Description copied from interface: Source

Return a name for this source, used for error reporting

Specified by:

toString in interface Source

Overrides:

toString in class Object

addMetadata

public void addMetadata(com.hp.hpl.jena.rdf.model.Resource meta)

Add metdata describing this source to a metdata model

Specified by:

addMetadata in interface Source

supportsNestedSelect

public boolean supportsNestedSelect()

Description copied from interface: Source

Answer TRUE iff this source supports nested SELECT queries (as specified by SPARQL 1.1).

Specified by:

supportsNestedSelect in interface Source