comparison sites/all/libraries/ARC2/arc/serializers/ARC2_RDFJSONSerializer.php @ 4:ce11bbd8f642

added modules

+<?php
+/**
+ * ARC2 RDF/JSON Serializer
+ *
+ * @author Benjamin Nowack <[e-mail]>
+ * @license http://arc.semsol.org/license
+ * @homepage <http://arc.semsol.org/>
+ * @package ARC2
+*/
+
+ARC2::inc('RDFSerializer');
+
+class ARC2_RDFJSONSerializer extends ARC2_RDFSerializer {
+
+  function __construct($a, &$caller) {
+    parent::__construct($a, $caller);
+  }
+  
+  function __init() {
+    parent::__init();
+    $this->content_header = 'application/json';
+  }
+
+  /*  */
+  
+  function getTerm($v, $term = 's') {
+    if (!is_array($v)) {
+      if (preg_match('/^\_\:/', $v)) {
+        return ($term == 'o') ? $this->getTerm(array('value' => $v, 'type' => 'bnode'), 'o') : '"' . $v . '"';
+      }
+      return ($term == 'o') ? $this->getTerm(array('value' => $v, 'type' => 'uri'), 'o') : '"' . $v . '"';
+    }
+    if (!isset($v['type']) || ($v['type'] != 'literal')) {
+      if ($term != 'o') {
+        return $this->getTerm($v['value'], $term);
+      }
+      if (preg_match('/^\_\:/', $v['value'])) {
+        return '{ "value" : "' . $this->jsonEscape($v['value']) . '", "type" : "bnode" }';
+      }
+      return '{ "value" : "' . $this->jsonEscape($v['value']) . '", "type" : "uri" }';
+    }
+    /* literal */
+    $r = '{ "value" : "' . $this->jsonEscape($v['value']) . '", "type" : "literal"';
+    $suffix = isset($v['datatype']) ? ', "datatype" : "' . $v['datatype'] . '"' : '';
+    $suffix = isset($v['lang']) ? ', "lang" : "' . $v['lang'] . '"' : $suffix;
+    $r .= $suffix . ' }';
+    return $r;
+  }
+
+  function jsonEscape($v) {
+    if (function_exists('json_encode')) {
+        return preg_replace('/^"(.*)"$/', '\\1', str_replace("\/","/",json_encode($v)));
+    }
+    $from = array("\\", "\r", "\t", "\n", '"', "\b", "\f");
+    $to = array('\\\\', '\r', '\t', '\n', '\"', '\b', '\f');
+    return str_replace($from, $to, $v);
+  }
+    
+  function getSerializedIndex($index, $raw = 0) {
+    $r = '';
+    $nl = "\n";
+    foreach ($index as $s => $ps) {
+      $r .= $r ? ',' . $nl . $nl : '';
+      $r .= '  ' . $this->getTerm($s). ' : {';
+      $first_p = 1;
+      foreach ($ps as $p => $os) {
+        $r .= $first_p ? $nl : ',' . $nl;
+        $r .= '    ' . $this->getTerm($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 : ',' . $nl;
+          $r .= '      ' . $this->getTerm($o, 'o');
+          $first_o = 0;
+        }
+        $first_p = 0;
+        $r .= $nl . '    ]';
+      }
+      $r .= $nl . '  }';
+    }
+    $r .= $r ? ' ' : '';
+    return '{' . $nl . $r . $nl . '}';
+  }
+  
+  /*  */
+
+}