Package org.topbraid.jenax.util

Class RDFLabels

  • public class RDFLabels
extends Object
    A singleton that is used to render resources into strings. By default this displays qnames (if possible). Can be changed, for example, to switch to displaying rdfs:labels instead of qnames etc.
    Author:
    Holger Knublauch

    • Constructor Detail

      • RDFLabels

        public RDFLabels()

    • Method Detail

      • get

        public static RDFLabels get()
        Gets the singleton instance of this class.
        Returns:
        the singleton

      • set

        public static void set​(RDFLabels value)
        Replaces the singleton to a subclass with different behavior. This is used by TopBraid, which has its own rendering engine.
        Parameters:
        value - the new engine

      • getBlankNodeLabel

        public String getBlankNodeLabel​(org.apache.jena.rdf.model.Resource resource)
        Gets a "human-readable" label for a blank node, e.g. Manchester Syntax for OWL restrictions. The default implementation doesn't do much yet it's overloaded in TopBraid.
        Parameters:
        resource - the blank node resource to get the label for
        Returns:
        a label for the bnode

      • getCustomizedLabel

        public String getCustomizedLabel​(org.apache.jena.rdf.model.Resource resource)
        Gets a "human-readable" label for a given Resource. This checks for any existing rdfs:label, otherwise falls back to getLabel().
        Parameters:
        resource - the resource to get the label for
        Returns:
        the label (never null)

      • getLabel

        public String getLabel​(org.apache.jena.rdf.model.Resource resource)
        Gets the label for a given Resource.
        Parameters:
        resource - the Resource to get the label of
        Returns:
        the label (never null)

      • getNodeLabel

        public String getNodeLabel​(org.apache.jena.rdf.model.RDFNode node)

      • appendTemplateCallLabel

        public static void appendTemplateCallLabel​(StringBuffer buffer,
                                           String labelTemplate,
                                           Map<String,​org.apache.jena.rdf.model.RDFNode> args)
        Renders a template call's label template into a label by inserting the evaluated SPARQL expressions into appropriate spaces marked with {expression}. Currently only simple variables are supported, e.g. {?test }.
        Parameters:
        buffer - the StringBuffer to write to
        labelTemplate - the labelTemplate
        args - the arguments a Map of pre-bound variables (supplied arguments)

      • unCamelCase

        public static String unCamelCase​(String camelCase)
        Takes a string that is (likely) in camelCase and attempts to produce an un-camel-cased version of that. Useful to generate labels from local names.
        Parameters:
        camelCase - the input String
        Returns:
        the generated String