org.eclipse.rdf4j.common.iteration.ExceptionConvertingIteration Java Examples

The following examples show how to use org.eclipse.rdf4j.common.iteration.ExceptionConvertingIteration. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: SailTripleSource.java    From CostFed with GNU Affero General Public License v3.0 6 votes vote down vote up 
@Override
public CloseableIteration<Statement, QueryEvaluationException> getStatements(RepositoryConnection conn, Resource subj, IRI pred, Value obj, Resource... contexts) throws RepositoryException,
		MalformedQueryException, QueryEvaluationException {
	
	// TODO add handling for contexts
	RepositoryResult<Statement> repoResult = conn.getStatements(subj, pred, obj, true);
	
	// XXX implementation remark and TODO taken from Sesame
	// The same variable might have been used multiple times in this
	// StatementPattern, verify value equality in those cases.
	
	return new ExceptionConvertingIteration<Statement, QueryEvaluationException>(repoResult) {
		@Override
		protected QueryEvaluationException convert(Exception arg0) {
			return new QueryEvaluationException(arg0);
		}
	};
}
Example #2
Source File: SparqlTripleSource.java    From CostFed with GNU Affero General Public License v3.0 6 votes vote down vote up 
@Override
public CloseableIteration<Statement, QueryEvaluationException> getStatements(
		RepositoryConnection conn, Resource subj, IRI pred, Value obj,
		Resource... contexts) throws RepositoryException,
		MalformedQueryException, QueryEvaluationException
{
	
	// TODO add handling for contexts
	monitorRemoteRequest();
	RepositoryResult<Statement> repoResult = conn.getStatements(subj, pred, obj, true);
	
	return new ExceptionConvertingIteration<Statement, QueryEvaluationException>(repoResult) {
		@Override
		protected QueryEvaluationException convert(Exception arg0) {
			return new QueryEvaluationException(arg0);
		}
	};		
}
Example #3
Source File: SailTripleSource.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up 
@Override
public CloseableIteration<Statement, QueryEvaluationException> getStatements(
		Resource subj, IRI pred, Value obj, QueryInfo queryInfo, Resource... contexts)
		throws RepositoryException,
		MalformedQueryException, QueryEvaluationException {

	return withConnection((conn, resultHolder) -> {

		RepositoryResult<Statement> repoResult = conn.getStatements(subj, pred, obj,
				queryInfo.getIncludeInferred(), contexts);

		// XXX implementation remark and TODO taken from Sesame
		// The same variable might have been used multiple times in this
		// StatementPattern, verify value equality in those cases.

		resultHolder.set(new ExceptionConvertingIteration<Statement, QueryEvaluationException>(repoResult) {
			@Override
			protected QueryEvaluationException convert(Exception arg0) {
				return new QueryEvaluationException(arg0);
			}
		});
	});
}
Example #4
Source File: SparqlTripleSource.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up 
@Override
public CloseableIteration<Statement, QueryEvaluationException> getStatements(
		Resource subj, IRI pred, Value obj, QueryInfo queryInfo,
		Resource... contexts) throws RepositoryException,
		MalformedQueryException, QueryEvaluationException {

	return withConnection((conn, resultHolder) -> {
		monitorRemoteRequest();
		RepositoryResult<Statement> repoResult = conn.getStatements(subj, pred, obj,
				queryInfo.getIncludeInferred(), contexts);

		resultHolder.set(new ExceptionConvertingIteration<Statement, QueryEvaluationException>(repoResult) {
			@Override
			protected QueryEvaluationException convert(Exception ex) {
				if (ex instanceof QueryEvaluationException) {
					return (QueryEvaluationException) ex;
				}
				return new QueryEvaluationException(ex);
			}
		});
	});
}
Example #5
Source File: SailTripleSource.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
@Override
public CloseableIteration<? extends Statement, QueryEvaluationException> getStatements(Resource subj, IRI pred,
		Value obj, Resource... contexts) throws QueryEvaluationException {
	CloseableIteration<? extends Statement, SailException> iter = null;
	CloseableIteration<? extends Statement, QueryEvaluationException> result = null;

	boolean allGood = false;
	try {
		iter = conn.getStatements(subj, pred, obj, includeInferred, contexts);
		result = new ExceptionConvertingIteration<Statement, QueryEvaluationException>(iter) {

			@Override
			protected QueryEvaluationException convert(Exception e) {
				return new QueryEvaluationException(e);
			}
		};
		allGood = true;
		return result;
	} catch (SailException e) {
		throw new QueryEvaluationException(e);
	} finally {
		if (!allGood) {
			try {
				if (result != null) {
					result.close();
				}
			} finally {
				if (iter != null) {
					iter.close();
				}
			}
		}
	}
}
Example #6
Source File: RepositoryTripleSource.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
@Override
public CloseableIteration<? extends Statement, QueryEvaluationException> getStatements(Resource subj, IRI pred,
		Value obj, Resource... contexts) throws QueryEvaluationException {
	CloseableIteration<? extends Statement, RepositoryException> iter = null;
	CloseableIteration<? extends Statement, QueryEvaluationException> result = null;

	boolean allGood = false;
	try {
		iter = repo.getStatements(subj, pred, obj, includeInferred, contexts);
		result = new ExceptionConvertingIteration<Statement, QueryEvaluationException>(iter) {

			@Override
			protected QueryEvaluationException convert(Exception exception) {
				return new QueryEvaluationException(exception);
			}
		};
		allGood = true;
		return result;
	} catch (RepositoryException e) {
		throw new QueryEvaluationException(e);
	} finally {
		if (!allGood) {
			try {
				if (result != null) {
					result.close();
				}
			} finally {
				if (iter != null) {
					iter.close();
				}
			}
		}
	}
}
Example #7
Source File: SPARQLConnection.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
private RepositoryResult<Statement> getStatementsQuadMode(Resource subj, IRI pred, Value obj,
		boolean includeInferred, Resource... contexts)
		throws MalformedQueryException, RepositoryException, QueryEvaluationException {
	TupleQueryResult qRes = null;
	RepositoryResult<Statement> result = null;

	boolean allGood = false;
	try {
		TupleQuery tupleQuery = prepareTupleQuery(SPARQL, EVERYTHING_WITH_GRAPH);
		setBindings(tupleQuery, subj, pred, obj, contexts);
		tupleQuery.setIncludeInferred(includeInferred);
		qRes = tupleQuery.evaluate();
		result = new RepositoryResult<>(new ExceptionConvertingIteration<Statement, RepositoryException>(
				toStatementIteration(qRes, subj, pred, obj)) {

			@Override
			protected RepositoryException convert(Exception e) {
				return new RepositoryException(e);
			}
		});
		allGood = true;
		return result;
	} finally {
		if (!allGood) {
			try {
				if (result != null) {
					result.close();
				}
			} finally {
				if (qRes != null) {
					qRes.close();
				}
			}
		}
	}
}
Example #8
Source File: SPARQLConnection.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
private RepositoryResult<Statement> getStatementGeneral(Resource subj, IRI pred, Value obj, boolean includeInferred,
		Resource... contexts) throws RepositoryException, MalformedQueryException, QueryEvaluationException {
	GraphQueryResult gRes = null;
	RepositoryResult<Statement> result = null;

	boolean allGood = false;
	try {
		GraphQuery query = prepareGraphQuery(SPARQL, EVERYTHING, "");
		query.setIncludeInferred(includeInferred);
		setBindings(query, subj, pred, obj, contexts);
		gRes = query.evaluate();
		result = new RepositoryResult<>(
				new ExceptionConvertingIteration<Statement, RepositoryException>(gRes) {

					@Override
					protected RepositoryException convert(Exception e) {
						return new RepositoryException(e);
					}
				});
		allGood = true;
		return result;
	} finally {
		if (!allGood) {
			try {
				if (result != null) {
					result.close();
				}
			} finally {
				if (gRes != null) {
					gRes.close();
				}
			}
		}
	}
}
Example #9
Source File: SPARQLConnection.java    From rdf4j with BSD 3-Clause "New" or "Revised" License 4 votes vote down vote up 
@Override
public RepositoryResult<Resource> getContextIDs() throws RepositoryException {
	TupleQueryResult iter = null;
	RepositoryResult<Resource> result = null;

	boolean allGood = false;
	try {
		TupleQuery query = prepareTupleQuery(SPARQL, NAMEDGRAPHS, "");
		iter = query.evaluate();
		result = new RepositoryResult<>(new ExceptionConvertingIteration<Resource, RepositoryException>(
				new ConvertingIteration<BindingSet, Resource, QueryEvaluationException>(iter) {

					@Override
					protected Resource convert(BindingSet bindings) throws QueryEvaluationException {
						return (Resource) bindings.getValue("_");
					}
				}) {

			@Override
			protected RepositoryException convert(Exception e) {
				return new RepositoryException(e);
			}
		});
		allGood = true;
		return result;
	} catch (MalformedQueryException |

			QueryEvaluationException e) {
		throw new RepositoryException(e);
	} finally {
		if (!allGood) {
			try {
				if (result != null) {
					result.close();
				}
			} finally {
				if (iter != null) {
					iter.close();
				}
			}
		}
	}
}