Package org.eclipse.rdf4j.query.impl
Class BackgroundGraphResult
java.lang.Object
org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E>
org.eclipse.rdf4j.common.iteration.IterationWrapper<Statement>
org.eclipse.rdf4j.query.impl.BackgroundGraphResult
- All Implemented Interfaces:
AutoCloseable,Iterable<Statement>,Runnable,Iterator<Statement>,CloseableIteration<Statement>,GraphQueryResult,QueryResult<Statement>,RDFHandler
public class BackgroundGraphResult
extends IterationWrapper<Statement>
implements GraphQueryResult, Runnable, RDFHandler
Provides concurrent access to statements as they are being parsed when instances of this class are run as Threads.
- Author:
- James Leigh
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Field Summary
Fields inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper
wrappedIter -
Constructor Summary
ConstructorsConstructorDescriptionBackgroundGraphResult(QueueCursor<Statement> queue, RDFParser parser, InputStream in, Charset charset, String baseURI) BackgroundGraphResult(RDFParser parser, InputStream in, Charset charset, String baseURI) -
Method Summary
Modifier and TypeMethodDescriptionvoidendRDF()Signals the end of the RDF data.Retrieves relevant namespaces from the query result.protected voidCloses this Iteration and also closes the wrapped Iteration if it is aCloseableIteration.voidhandleComment(String comment) Handles a comment.voidhandleNamespace(String prefix, String uri) Handles a namespace declaration/definition.voidHandles a statement.voidrun()voidstartRDF()Signals the start of the RDF data.Methods inherited from class org.eclipse.rdf4j.common.iteration.IterationWrapper
hasNext, next, removeMethods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosedMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
closeMethods inherited from interface java.lang.Iterable
forEach, spliteratorMethods inherited from interface java.util.Iterator
forEachRemaining, removeMethods inherited from interface org.eclipse.rdf4j.query.QueryResult
hasNext, iterator, next, stream
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Constructor Details
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BackgroundGraphResult
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BackgroundGraphResult
public BackgroundGraphResult(QueueCursor<Statement> queue, RDFParser parser, InputStream in, Charset charset, String baseURI)
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Method Details
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handleClose
Description copied from class:IterationWrapperCloses this Iteration and also closes the wrapped Iteration if it is aCloseableIteration.- Overrides:
handleClosein classIterationWrapper<Statement>- Throws:
QueryEvaluationException
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run
public void run() -
startRDF
Description copied from interface:RDFHandlerSignals the start of the RDF data. This method is called before any data is reported.- Specified by:
startRDFin interfaceRDFHandler- Throws:
RDFHandlerException- If the RDF handler has encountered an unrecoverable error.
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getNamespaces
Description copied from interface:GraphQueryResultRetrieves relevant namespaces from the query result.
The contents of the Map may be modified after it is returned, as the initial return may be performed when the first RDF Statement is encountered.- Specified by:
getNamespacesin interfaceGraphQueryResult- Returns:
- a Map<String, String> object containing (prefix, namespace) pairs.
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handleComment
Description copied from interface:RDFHandlerHandles a comment.- Specified by:
handleCommentin interfaceRDFHandler- Parameters:
comment- The comment.- Throws:
RDFHandlerException- If the RDF handler has encountered an unrecoverable error.
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handleNamespace
Description copied from interface:RDFHandlerHandles a namespace declaration/definition. A namespace declaration associates a (short) prefix string with the namespace's URI. The prefix for default namespaces, which do not have an associated prefix, are represented as empty strings.- Specified by:
handleNamespacein interfaceRDFHandler- Parameters:
prefix- The prefix for the namespace, or an empty string in case of a default namespace.uri- The URI that the prefix maps to.- Throws:
RDFHandlerException- If the RDF handler has encountered an unrecoverable error.
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handleStatement
Description copied from interface:RDFHandlerHandles a statement.- Specified by:
handleStatementin interfaceRDFHandler- Parameters:
st- The statement.- Throws:
RDFHandlerException- If the RDF handler has encountered an unrecoverable error.
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endRDF
Description copied from interface:RDFHandlerSignals the end of the RDF data. This method is called when all data has been reported.- Specified by:
endRDFin interfaceRDFHandler- Throws:
RDFHandlerException- If the RDF handler has encountered an unrecoverable error.
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