Redland RDF Language Bindings - Ruby RDoc - Class: Redland::Serializer

### Home Classes Methods

### In Files

- rdf/redland/serializer.rb

### Parent

Object

### Methods

- ::create_finalizer
- ::new
- ::ntriples
- #feature
- #model_to_string
- #setFeature
- #set_namespace
- #to_file

### Files

- Makefile
- Makefile
- Makefile
- Makefile

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# Redland::Serializer

This module provides RDF graph to syntax serialization support via factory classes providing one or more particular target syntaxes.

### Public Class Methods

create_finalizer(serializer) click to toggle source

You shouldn't use this. Used internally for cleanup.

    # File rdf/redland/serializer.rb, line 26
    def Serializer.create_finalizer(serializer)
      proc {|id| # "Finalizer on #{id}"
        #log_final.info "closing serializer"
        Redland::librdf_free_serializer(serializer)
      }
    end

new(name='rdfxml',mime_type="application/rdf+xml",uri=nil) click to toggle source

Constructor - create a new Serializer object name - the serializer factory name mime_type - the MIME type of the syntax uri - URI of syntax

    # File rdf/redland/serializer.rb, line 12
    def initialize(name='rdfxml',mime_type="application/rdf+xml",uri=nil)
      uri = uri.uri if uri
      @serializer = Redland.librdf_new_serializer($world.world,name,mime_type,uri)
      raise RedlandError.new("Serializer construction failed") if !@serializer
      ObjectSpace.define_finalizer(self,Serializer.create_finalizer(@serializer))
    end

ntriples(uri=nil) click to toggle source

Create a NTriples serializer uri - URI of syntax

    # File rdf/redland/serializer.rb, line 21
    def Serializer.ntriples(uri=nil)
      return Serializer.new('ntriples','text/plain',uri)
    end

### Public Instance Methods

feature(uri) click to toggle source

Get a parser feature. The feature is named via RDF::Redland::URI I<URI>

    # File rdf/redland/serializer.rb, line 46
    def feature(uri)
      uri = Uri.new(uri) unless uri.class == Uri
      value = Redland::librdf_serializer_get_feature(@serializer,uri.uri)
      if value == "NULL" or value==nil
        return nil
      else
        return Node.new(:from_object=>value)
      end
    end

model_to_string(base_uri, model) click to toggle source

Serialize the RDF graph in model to a string

    # File rdf/redland/serializer.rb, line 71
    def model_to_string(base_uri, model)
      if base_uri
        base_uri = base_uri.uri
      end
      return Redland.librdf_serializer_serialize_model_to_string(@serializer, base_uri, model.model)
    end

setFeature(uri,value) click to toggle source

Set a serializer feature. The feature is named via RDF::Redland::URI I<URI> and the value is a RDF::Redland::Node.

    # File rdf/redland/serializer.rb, line 58
    def setFeature(uri,value)
      uri = Uri.new(uri) unless uri.class == Uri
      if value.class == String then value = Node.new(:literal=>value) end
      return (Redland::librdf_serializer_set_feature(@serializer,uri.uri,value.node) == 0)
    end

set_namespace(prefix, uri) click to toggle source

Set a serializer namepace to the desired prefix

    # File rdf/redland/serializer.rb, line 65
    def set_namespace(prefix, uri)
      uri = Uri.new(uri) unless uri.class == Uri
      return (Redland::librdf_serializer_set_namespace(@serializer,uri.uri,prefix) == 0)
    end

to_file(name,model,base_uri=nil) click to toggle source

Serializes a model and stores it in a file name - the serializer factory name mime_type - the MIME type of the syntax base_uri - URI of syntax

    # File rdf/redland/serializer.rb, line 37
    def to_file(name,model,base_uri=nil)
      if base_uri
        base_uri = base_uri.uri
      end
      return Redland.librdf_serializer_serialize_model_to_file(@serializer,name,base_uri,model.model)
    end

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