org.linkeddatafragments.fragments.tpf

Class TriplePatternFragmentBase

java.lang.Object

org.linkeddatafragments.fragments.LinkedDataFragmentBase

org.linkeddatafragments.fragments.tpf.TriplePatternFragmentBase

All Implemented Interfaces:

Closeable, AutoCloseable, ILinkedDataFragment, ITriplePatternFragment

Direct Known Subclasses:

TriplePatternFragmentImpl

public abstract class TriplePatternFragmentBase
extends LinkedDataFragmentBase
implements ITriplePatternFragment

Base class for implementations of ITriplePatternFragment.

Author:

Ruben Verborgh, Olaf Hartig

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TriplePatternFragmentBase.EmptyStmtIterator

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.jena.rdf.model.StmtIterator	emptyStmtIterator

Fields inherited from class org.linkeddatafragments.fragments.LinkedDataFragmentBase

datasetURL, fragmentURL, isLastPage, pageNumber

Constructor Summary

Constructors

Constructor and Description
TriplePatternFragmentBase(long totalSize, String fragmentURL, String datasetURL, long pageNumber, boolean isLastPage) Creates a new Triple Pattern Fragment.
TriplePatternFragmentBase(String fragmentURL, String datasetURL) Creates an empty Triple Pattern Fragment.
TriplePatternFragmentBase(String fragmentURL, String datasetURL, long pageNumber, boolean isLastPage) Creates an empty Triple Pattern Fragment page.

Method Summary

Modifier and Type	Method and Description
void	addControls(org.apache.jena.rdf.model.Model model) Adds an RDF description of page links to the given RDF model.
void	addMetadata(org.apache.jena.rdf.model.Model model) Adds some basic metadata to the given RDF model.
protected abstract org.apache.jena.rdf.model.StmtIterator	getNonEmptyStmtIterator()
String	getTemplate()
long	getTotalSize() Gets the total number of triples in the fragment (can be an estimate).
org.apache.jena.rdf.model.StmtIterator	getTriples() Returns an iterator over the RDF data of this fragment (possibly only partial if the data is paged, as indicated by ILinkedDataFragment.isPageOnly()).

Methods inherited from class org.linkeddatafragments.fragments.LinkedDataFragmentBase

close, getControls, getDatasetURI, getMaxPageSize, getMetadata, getPageNumber, isLastPage, isPageOnly

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.linkeddatafragments.fragments.ILinkedDataFragment

getControls, getMaxPageSize, getMetadata, getPageNumber, isLastPage, isPageOnly

Methods inherited from interface java.io.Closeable

close

Field Detail

emptyStmtIterator

public static final org.apache.jena.rdf.model.StmtIterator emptyStmtIterator

Constructor Detail

TriplePatternFragmentBase

public TriplePatternFragmentBase(String fragmentURL,
                                 String datasetURL)

Creates an empty Triple Pattern Fragment.

Parameters:

fragmentURL -

datasetURL -

TriplePatternFragmentBase

public TriplePatternFragmentBase(String fragmentURL,
                                 String datasetURL,
                                 long pageNumber,
                                 boolean isLastPage)

Creates an empty Triple Pattern Fragment page.

Parameters:

fragmentURL -

isLastPage -

datasetURL -

pageNumber -

TriplePatternFragmentBase

public TriplePatternFragmentBase(long totalSize,
                                 String fragmentURL,
                                 String datasetURL,
                                 long pageNumber,
                                 boolean isLastPage)

Creates a new Triple Pattern Fragment.

Parameters:

totalSize - the total size

fragmentURL -

datasetURL -

pageNumber -

isLastPage -

Method Detail

getTriples

public org.apache.jena.rdf.model.StmtIterator getTriples()

Description copied from interface: ILinkedDataFragment

Returns an iterator over the RDF data of this fragment (possibly only partial if the data is paged, as indicated by ILinkedDataFragment.isPageOnly()).

Specified by:

getTriples in interface ILinkedDataFragment

Returns:

getNonEmptyStmtIterator

protected abstract org.apache.jena.rdf.model.StmtIterator getNonEmptyStmtIterator()

Returns:

getTotalSize

public long getTotalSize()

Description copied from interface: ITriplePatternFragment

Gets the total number of triples in the fragment (can be an estimate).

Specified by:

getTotalSize in interface ITriplePatternFragment

Returns:

the total number of triples

addMetadata

public void addMetadata(org.apache.jena.rdf.model.Model model)

Description copied from class: LinkedDataFragmentBase

Adds some basic metadata to the given RDF model. This method may be overridden in subclasses.

Overrides:

addMetadata in class LinkedDataFragmentBase

addControls

public void addControls(org.apache.jena.rdf.model.Model model)

Description copied from class: LinkedDataFragmentBase

Adds an RDF description of page links to the given RDF model. This method may be overridden in subclasses.

Overrides:

addControls in class LinkedDataFragmentBase

getTemplate

public String getTemplate()

Returns: