Graph Component

The Graph component (graph://) provides operations for creating and manipulating RDF graphs within Apache Camel routes.

URI Format

graph://{operation}

Operations

Operation	Description
get	Create an RDFGraph (consumer or producer).
add	Add RDF triples from a ChimeraResource.
construct	Execute a SPARQL CONSTRUCT query.
select	Execute a SPARQL SELECT query.
ask	Execute a SPARQL ASK query.
dump	Serialize the graph to a file or string.
inference	Apply RDFS inference rules.
shacl	Validate with SHACL shapes.
detach	Clean up and optionally stop the route.

Consumer vs Producer

When used as a consumer (from("graph://get")), the get operation creates an empty RDFGraph and starts the route. This is the only operation that can act as a consumer.

When used as a producer (to("graph://...")), each operation processes the RDFGraph already present in the exchange body. The get operation can additionally load RDF data from an InputStream in the body.

For more on Camel consumers and producers, see the Apache Camel Endpoint documentation.

Header Overrides

Some parameters can be overridden per-exchange via Camel message headers:

Header	Constant	Overrides
context_graph	ChimeraConstants.CONTEXT_GRAPH	namedGraph
base_iri	ChimeraConstants.BASE_IRI	baseIri
rdfFormat	ChimeraConstants.RDF_FORMAT	rdfFormat
graph_id	ChimeraConstants.GRAPH_ID	Auto-generated named graph suffix