Class RDFJSONWriter

java.lang.Object
org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter
org.eclipse.rdf4j.rio.rdfjson.RDFJSONWriter
All Implemented Interfaces:
CharSink, Sink, RDFHandler, RDFWriter

public class RDFJSONWriter extends AbstractRDFWriter implements RDFWriter, CharSink
RDFWriter implementation for the RDF/JSON format
Author:
Peter Ansell p_ansell@yahoo.com
  • Constructor Details

  • Method Details

    • getWriter

      public Writer getWriter()
      Description copied from interface: CharSink
      get the Writer used by this CharSink.
      Specified by:
      getWriter in interface CharSink
      Returns:
      an Writer
    • startRDF

      public void startRDF() throws RDFHandlerException
      Description copied from interface: RDFHandler
      Signals the start of the RDF data. This method is called before any data is reported.
      Specified by:
      startRDF in interface RDFHandler
      Overrides:
      startRDF in class AbstractRDFWriter
      Throws:
      RDFHandlerException - If the RDF handler has encountered an unrecoverable error.
    • endRDF

      public void endRDF() throws RDFHandlerException
      Description copied from interface: RDFHandler
      Signals the end of the RDF data. This method is called when all data has been reported.
      Specified by:
      endRDF in interface RDFHandler
      Throws:
      RDFHandlerException - If the RDF handler has encountered an unrecoverable error.
    • getRDFFormat

      public RDFFormat getRDFFormat()
      Description copied from interface: RDFWriter
      Gets the RDF format that this RDFWriter uses.
      Specified by:
      getRDFFormat in interface RDFWriter
    • getSupportedSettings

      public Collection<RioSetting<?>> getSupportedSettings()
      Specified by:
      getSupportedSettings in interface RDFWriter
      Overrides:
      getSupportedSettings in class AbstractRDFWriter
      Returns:
      A collection of RioSettings that are supported by this RDFWriter.
    • handleComment

      public void handleComment(String comment) throws RDFHandlerException
      Description copied from interface: RDFHandler
      Handles a comment.
      Specified by:
      handleComment in interface RDFHandler
      Parameters:
      comment - The comment.
      Throws:
      RDFHandlerException - If the RDF handler has encountered an unrecoverable error.
    • handleNamespace

      public void handleNamespace(String prefix, String uri) throws RDFHandlerException
      Description copied from interface: RDFHandler
      Handles 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:
      handleNamespace in interface RDFHandler
      Overrides:
      handleNamespace in class AbstractRDFWriter
      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.
    • consumeStatement

      public void consumeStatement(Statement statement) throws RDFHandlerException
      Description copied from class: AbstractRDFWriter
      Consume a statement. Extending classes must override this method instead of overriding AbstractRDFWriter.handleStatement(Statement) in order to benefit from automatic handling of RDF-star conversion or encoding.
      Overrides:
      consumeStatement in class AbstractRDFWriter
      Parameters:
      statement - the statement to consume.
      Throws:
      RDFHandlerException
    • writeObject

      public static void writeObject(Value object, Set<Resource> contexts, com.fasterxml.jackson.core.JsonGenerator jg) throws com.fasterxml.jackson.core.JsonGenerationException, IOException
      Helper method to reduce complexity of the JSON serialisation algorithm Any null contexts will only be serialised to JSON if there are also non-null contexts in the contexts array
      Parameters:
      object - The RDF value to serialise
      contexts - The set of contexts that are relevant to this object, including null contexts as they are found.
      jg - the JsonGenerator to write to.
      Throws:
      IOException
      com.fasterxml.jackson.core.JsonGenerationException
    • resourceToString

      public static String resourceToString(Resource uriOrBnode)
      Returns the correct syntax for a Resource, depending on whether it is a URI or a Blank Node (ie, BNode)
      Parameters:
      uriOrBnode - The resource to serialise to a string
      Returns:
      The string value of the sesame resource
    • modelToRdfJsonInternal

      public static void modelToRdfJsonInternal(Model graph, WriterConfig writerConfig, com.fasterxml.jackson.core.JsonGenerator jg) throws IOException
      Throws:
      IOException