graph://get

Creates an RDFGraph and places it in the exchange body. The graph type is selected automatically based on the parameters provided (see RDF Graphs — Graph Types).

Behavior

As consumer (from("graph://get?...")): creates an empty RDFGraph and starts the route. This is the typical way to begin a graph-processing pipeline — the empty graph is then populated by downstream operations like graph://add.
As producer (to("graph://get?...")): creates an RDFGraph. If the exchange body contains an InputStream, the RDF data is parsed and loaded into the graph using the rdfFormat parameter. This is useful when receiving RDF data from an upstream Camel component (e.g., a file consumer or HTTP endpoint).

Parameters

Common

Parameter	Type	Required	Default	Description
`namedGraph`	`String`	No	Auto-generated	Named graph URI(s), separated by `;`. When multiple are provided, all are used as read contexts but only the first is used for inserts.
`baseIri`	`String`	No	`http://www.cefriel.com/data/`	Base IRI for relative URI resolution and named graph generation.
`defaultGraph`	`boolean`	No	`false`	When `true`, operations target the default (unnamed) graph instead of an auto-generated named graph.
`rdfFormat`	`String`	No	—	RDF format for parsing an InputStream body (producer mode only). Values: `turtle`, `rdfxml`, `ntriples`, `jsonld`, `n3`, `nquads`, `binary`, `rdfa`.

Graph-Type Specific

These parameters determine which type of RDFGraph is created. The first matching condition in priority order wins (see RDF Graphs — Graph Types).

Parameter	Type	Required	Default	Description
`chimeraResource`	`ChimeraResourceBean`	No	—	Ontology/schema for RDFS inference. When set, creates an InferenceRDFGraph. See ChimeraResource.
`allRules`	`boolean`	No	`true`	Controls RDFS inference rules (InferenceRDFGraph only). `true`: all RDFS rules. `false`: conservative subset for better performance.
`ontologyFormat`	`String`	No	—	RDF format of the ontology resource (InferenceRDFGraph only).
`serverUrl`	`String`	No	—	Base URL of the RDF4J Server. When set together with `repositoryID`, creates an HTTPRDFGraph.
`repositoryID`	`String`	No	—	Repository name on the RDF4J Server. Used together with `serverUrl`.
`sparqlEndpoint`	`String`	No	—	SPARQL endpoint URL. When set, creates a SPARQLEndpointGraph.
`pathDataDir`	`String`	No	—	Directory for persistent on-disk storage. When set alone, creates a NativeRDFGraph. When set with `chimeraResource`, provides persistent backing for InferenceRDFGraph.

Example

Java DSLYAML

ChimeraResourceBean triples = new ChimeraResourceBean(
    "file://./data/input.ttl", "turtle");
getCamelContext().getRegistry().bind("triples", triples);

// Consumer: empty in-memory graph
from("graph://get")
    .to("graph://add?chimeraResource=#bean:triples")
    .to("graph://dump?dumpFormat=turtle");

- beans:
    - name: triples
      type: com.cefriel.util.ChimeraResourceBean
      properties:
        url: "file://./data/input.ttl"
        serializationFormat: "turtle"

- route:
    from:
      uri: "graph://get"
    steps:
      - to:
          uri: "graph://add"
          parameters:
            chimeraResource: "#triples"
      - to:
          uri: "graph://dump"
          parameters:
            dumpFormat: "turtle"