comparison sites/all/libraries/ARC2/arc/serializers/ARC2_TurtleSerializer.php @ 4:ce11bbd8f642

added modules

+<?php
+/**
+ * ARC2 Turtle Serializer
+ *
+ * @author    Benjamin Nowack
+ * @license   http://arc.semsol.org/license
+ * @homepage <http://arc.semsol.org/>
+ * @package   ARC2
+ * @version   2010-11-16
+*/
+
+ARC2::inc('RDFSerializer');
+
+class ARC2_TurtleSerializer extends ARC2_RDFSerializer {
+
+  function __construct($a, &$caller) {
+    parent::__construct($a, $caller);
+  }
+  
+  function __init() {
+    parent::__init();
+    $this->content_header = 'application/x-turtle';
+  }
+
+  /*  */
+  
+  function getTerm($v, $term = '', $qualifier = '') {
+    if (!is_array($v)) {
+      if (preg_match('/^\_\:/', $v)) {
+        return $v;
+      }
+      if (($term === 'p') && ($pn = $this->getPName($v))) {
+        return $pn;
+      }
+      if (
+        ($term === 'o') &&
+        in_array($qualifier, array('rdf:type', 'rdfs:domain', 'rdfs:range', 'rdfs:subClassOf')) &&
+        ($pn = $this->getPName($v))
+      ) {
+        return $pn;
+      }
+      if (preg_match('/^[a-z0-9]+\:[^\s]*$/is' . ($this->has_pcre_unicode ? 'u' : ''), $v)) {
+        return '<' .$v. '>';
+      }
+      return $this->getTerm(array('type' => 'literal', 'value' => $v), $term, $qualifier);
+    }
+    if (!isset($v['type']) || ($v['type'] != 'literal')) {
+      return $this->getTerm($v['value'], $term, $qualifier);
+    }
+    /* literal */
+    $quot = '"';
+    if (preg_match('/\"/', $v['value'])) {
+      $quot = "'";
+      if (preg_match('/\'/', $v['value']) || preg_match('/[\x0d\x0a]/', $v['value'])) {
+        $quot = '"""';
+        if (preg_match('/\"\"\"/', $v['value']) || preg_match('/\"$/', $v['value']) || preg_match('/^\"/', $v['value'])) {
+          $quot = "'''";
+          $v['value'] = preg_replace("/'$/", "' ", $v['value']);
+          $v['value'] = preg_replace("/^'/", " '", $v['value']);
+          $v['value'] = str_replace("'''", '\\\'\\\'\\\'', $v['value']);
+        }
+      }
+    }
+    if ((strlen($quot) == 1) && preg_match('/[\x0d\x0a]/', $v['value'])) {
+      $quot = $quot . $quot . $quot;
+    }
+    $suffix = isset($v['lang']) && $v['lang'] ? '@' . $v['lang'] : '';
+    $suffix = isset($v['datatype']) && $v['datatype'] ? '^^' . $this->getTerm($v['datatype'], 'dt') : $suffix;
+    return $quot . $v['value'] . $quot . $suffix;
+  }
+  
+  function getHead() {
+    $r = '';
+    $nl = "\n";
+    foreach ($this->used_ns as $v) {
+      $r .= $r ? $nl : '';
+      foreach ($this->ns as $prefix => $ns) {
+        if ($ns != $v) continue;
+        $r .= '@prefix ' . $prefix . ': <' .$v. '> .';
+        break;
+      }
+    }
+    return $r;
+  }
+  
+  function getSerializedIndex($index, $raw = 0) {
+    $r = '';
+    $nl = "\n";
+    foreach ($index as $s => $ps) {
+      $r .= $r ? ' .' . $nl . $nl : '';
+      $s = $this->getTerm($s, 's');
+      $r .= $s;
+      $first_p = 1;
+      foreach ($ps as $p => $os) {
+        if (!$os) continue;
+        $p = $this->getTerm($p, 'p');
+        $r .= $first_p ? ' ' : ' ;' . $nl . str_pad('', strlen($s) + 1);
+        $r .= $p;
+        $first_o = 1;
+        if (!is_array($os)) {/* single literal o */
+          $os = array(array('value' => $os, 'type' => 'literal'));
+        }
+        foreach ($os as $o) {
+          $r .= $first_o ? ' ' : ' ,' . $nl . str_pad('', strlen($s) + strlen($p) + 2);
+          $o = $this->getTerm($o, 'o', $p);
+          $r .= $o;
+          $first_o = 0;
+        }
+        $first_p = 0;
+      }
+    }
+    $r .= $r ? ' .' : '';
+    if ($raw) {
+      return $r;
+    }
+    return $r ? $this->getHead() . $nl . $nl . $r : '';
+  }
+  
+  /*  */
+
+}