source: Dev/trunk/rdfapi/model/Resource.php @ 12

<?php
require_once RDFAPI_INCLUDE_DIR . 'model/Node.php';

// ----------------------------------------------------------------------------------
// Class: Resource
// ----------------------------------------------------------------------------------

/**
 * An RDF resource.
 * Every RDF resource must have a URIref.
 * URIrefs are treated as logical constants, i.e. as names which denote something
 * (the things are called 'resources', but no assumptions are made about the nature of resources.)
 * Many RDF resources are pieces of vocabulary. They typically have a namespace
 * and a local name. In this case, a URI is composed as a
 * concatenation of the namespace and the local name.
 *
 *
 * @version  $Id: Resource.php 453 2007-06-20 21:19:09Z cweiske $
 * @author Chris Bizer <chris@bizer.de>
 *
 * @package model
 * @access      public
 *
 */
 class Resource extends Node {

        /**
        * URIref to the resource
        * @var          string
        * @access       private
        */
    var $uri;


   /**
    * Constructor
        * Takes an URI or a namespace/localname combination
    *
    * @param    string  $namespace_or_uri
        * @param string $localName
        * @access       public
    */
    function Resource($namespace_or_uri , $localName = NULL) {
                if ($localName == NULL) {
                        $this->uri = $namespace_or_uri;
                } else {
                        $this->uri = $namespace_or_uri . $localName;
            }
        }


  /**
   * Returns the URI of the resource.
   * @return string
   * @access    public
   */
  function getURI() {
                        return $this->uri;
   }

        /**
         * Returns the label of the resource, which is the URI of the resource.
     * @access  public
         * @return string
         */
    function getLabel() {
        return $this->getURI();
    }

  /**
   * Returns the namespace of the resource. May return null.
   * @access    public
   * @return string
   */
  function getNamespace() {
        // Import Package Utility
        include_once(RDFAPI_INCLUDE_DIR.PACKAGE_UTILITY);
        $rdfUtil = new RDFUtil();
        return $rdfUtil->guessNamespace($this->uri);
  }

  /**
   * Returns the local name of the resource.
   * @access    public
   * @return string
   */
    function getLocalName() {
        // Import Package Utility
                include_once(RDFAPI_INCLUDE_DIR.PACKAGE_UTILITY);
                
                $rdfUtil = new RDFUtil();               
            return $rdfUtil->guessName($this->uri);
        }

  /**
   * Dumps resource.
   * @access    public
   * @return string
   */
  function toString() {
        return 'Resource("' . $this->uri .'")';
  }

  /**
   * Checks if the resource equals another resource.
   * Two resources are equal, if they have the same URI
   *
   * @access    public
   * @param             object  resource $that
   * @return    boolean
   */
   function equals ($that) {

            if ($this == $that) {
              return true;
            }

            if (($that == NULL) or !(is_a($that, 'Resource')) or (is_a($that, 'BlankNode'))) {
              return false;
            }

                if ($this->getURI() == $that->getURI()) {
              return true;
            }

            return false;
        }




    /**
    *   Doing string magic in PHP5
    *   @return string String representation of this Resource
    */
    function __toString()
    {
        return $this->toString();
    }

}

?>