ARC_simple_model.php in Taxonomy import/export via XML 6

File

arc/ARC_simple_model.php

<?php


class ARC_simple_model {
  var $triples = array();
  var $ns_abbrs = array();

  /* uri2prefix mapping, URIs with empty prefixes will be stored without a ":"-connector */
  var $resources = array();
  var $resource_indices = array();

  /* resource_uri/bnode_id -> index in $resources array */
  var $typed_resources = array();

  /* class_uri -> resource_uri[] */
  function ARC_simple_model($args = "") {
    if (is_array($args)) {
      foreach ($args as $k => $v) {
        $this->{$k} = $v;
      }
    }

    /* triples, ns_abbrs */
    $this
      ->init();
  }

  /*					*/
  function set_triples($triples) {
    $this->triples = $triples;
  }
  function get_triples() {
    return $this->triples;
  }

  /*					*/
  function get_abbr_val($val = "") {

    /* split */
    if (preg_match("/(.+)#(.+)\$/", $val, $matches)) {

      /* fragId */
      $ns_uri = $matches[1] . "#";
      $local_part = $matches[2];
    }
    elseif (preg_match("/(.+)\\/([^\\/]+)\$/", $val, $matches)) {

      /* last slash */
      $ns_uri = $matches[1] . "/";
      $local_part = $matches[2];
    }
    if (isset($ns_uri) && isset($this->ns_abbrs[$ns_uri])) {
      if ($abbr = $this->ns_abbrs[$ns_uri]) {
        return $abbr . ":" . $local_part;
      }
      else {

        /* empty abbr */
        return $local_part;
      }
    }
    return $val;
  }

  /*					*/
  function init() {
    $triples =& $this->triples;

    /* reference */
    $resources = array();

    /* resources */
    $resource_indices = array();

    /* resource_index */
    $typed_resources = array();

    /* key=class uri */
    for ($i = 0, $i_max = count($triples); $i < $i_max; $i++) {
      $cur_t = $triples[$i];

      /* s,p,o vars */
      $s = $cur_t["s"];
      $s_type = $s["type"];
      $s_val = $s_type == "uri" ? $s["uri"] : $s["bnode_id"];
      $s_val = $s_type == "uri" ? $this
        ->get_abbr_val($s_val) : $s_val;
      $p_full = $cur_t["p"];
      $p = $this
        ->get_abbr_val($p_full);
      $o = $cur_t["o"];
      $o_type = $o["type"];
      $o_val = $o_type == "uri" ? $o["uri"] : $o["bnode_id"];
      $o_val = $o_type == "literal" ? $o["val"] : $o_val;
      $o_val = $o_type == "uri" ? $this
        ->get_abbr_val($o_val) : $o_val;
      $o_val = strpos(utf8_decode(str_replace("?", "", $o_val)), "?") === false ? utf8_decode($o_val) : $o_val;
      $o_dt = $o_type == "literal" && $o["dt"] ? $o["dt"] : "";
      $o_lang = $o_type == "literal" && $o["lang"] ? $o["lang"] : "";

      /* s */
      if (!isset($resource_indices[$s_val])) {

        /* new entry */
        $cur_resource_index = count($resources);
        $resources[$cur_resource_index] = array(
          "val" => $s_val,
          "type" => $s_type,
        );
        $resource_indices[$s_val] = $cur_resource_index;
      }
      else {
        $cur_resource_index = $resource_indices[$s_val];
      }

      /* props */
      if (!isset($resources[$cur_resource_index]["props"])) {
        $resources[$cur_resource_index]["props"] = array();
      }
      $props =& $resources[$cur_resource_index]["props"];

      /* props[$p] */
      if (!isset($props[$p])) {
        $props[$p] = array();
      }
      $props[$p][] = array(
        "val" => $o_val,
        "type" => $o_type,
        "dt" => $o_dt,
        "lang" => $o_lang,
      );

      /* typed r */
      if ($p_full == "http://www.w3.org/1999/02/22-rdf-syntax-ns#type") {
        if (!isset($typed_resources[$o_val])) {
          $typed_resources[$o_val] = array();
        }
        $typed_resources[$o_val][] =& $resources[$cur_resource_index];
      }
    }
    $this->resources = $resources;
    $this->resource_indices = $resource_indices;
    $this->typed_resources = $typed_resources;
    return true;
  }

  /*					*/
  function get_resources($type = "") {
    if ($type) {
      if (is_array($type)) {
        $result = array();
        $added_resources = array();
        for ($i = 0, $i_max = count($type); $i < $i_max; $i++) {
          $cur_type = $type[$i];
          $cur_resources = $this->typed_resources[$this
            ->get_abbr_val($cur_type)];
          for ($j = 0, $j_max = count($cur_resources); $j < $j_max; $j++) {
            $cur_resource = $cur_resources[$j];
            $cur_resource_identifier = $cur_resource["val"];
            if (!$added_resources[$cur_resource_identifier]) {
              $result[] = $cur_resource;
              $added_resources[$cur_resource_identifier] = true;
            }
          }
        }
        return $result;
      }
      else {
        return $this->typed_resources[$this
          ->get_abbr_val($type)];
      }
    }
    else {
      return $this->resources;
    }
  }
  function get_resource($identifier = "") {
    return $this->resources[$this->resource_indices[$identifier]];
  }
  function resource_is_of_type($res, $type) {
    $props = $res["props"][$this
      ->get_abbr_val("http://www.w3.org/1999/02/22-rdf-syntax-ns#type")];
    if (is_array($props)) {
      for ($i = 0, $i_max = count($props); $i < $i_max; $i++) {
        if (is_array($type)) {
          if (in_array($props[$i]["val"], $type)) {
            return true;
          }
        }
        else {
          if ($props[$i]["val"] == $this
            ->get_abbr_val($type)) {
            return true;
          }
        }
      }
    }
    return false;
  }

  /*					*/
  function get_resource_props($identifier = "", $prop = "") {
    if ($prop) {
      if (isset($this->resources[$this->resource_indices[$identifier]]["props"][$prop])) {
        return $this->resources[$this->resource_indices[$identifier]]["props"][$prop];
      }
      return array();
    }
    else {
      return $this->resources[$this->resource_indices[$identifier]]["props"];
    }
  }
  function get_resource_prop_val($res, $prop) {
    if ($res && isset($res["props"]) && isset($res["props"][$prop])) {
      return $res["props"][$prop][0]["val"];
    }
    return "";
  }
  function rpv($res, $prop) {
    return $this
      ->get_resource_prop_val($res, $prop);
  }

  /*					*/
  function get_list_entries($list_id) {
    $result = array();
    if ($res = $this
      ->get_resource($list_id)) {
      while ($res) {
        if ($f_props = $res["props"][$this
          ->get_abbr_val("http://www.w3.org/1999/02/22-rdf-syntax-ns#first")]) {
          $first_id = $f_props[0]["val"];
          if ($r_props = $res["props"][$this
            ->get_abbr_val("http://www.w3.org/1999/02/22-rdf-syntax-ns#rest")]) {
            $result[] = $this
              ->get_resource($first_id);
            $rest_id = $r_props[0]["val"];
            if ($rest_id != "http://www.w3.org/1999/02/22-rdf-syntax-ns#nil") {
              $res = $this
                ->get_resource($rest_id);
            }
            else {
              $res = false;
            }
          }
        }
      }
    }
    return $result;
  }

}

Classes

Name	Description
ARC_simple_model