Changeset 315

Timestamp:

03/16/12 14:04:47 (13 years ago)

Author:

jkraaijeveld

Message:

[Server] Started work on validating if a change is valid. RdfObjects? now need a getModifiablefields method which returns the fields which can be modified for an object in its particular state. The objects which have different modifiable fields depending on the situation (see state diagram) need a 'state' value, which is an integer for now. Evaluate now checks whether a modified field is valid and throws an exception if its not.

Location:

Dev/branches/jos-branch

Files:

• . (modified) (1 prop)
• server/classes/Model.php (modified) (18 diffs)

Dev/branches/jos-branch/server/classes/Model.php

@@ -59 +59 @@
      * per type, because the result is cached.
      */
-    protected abstract static function createFIELDS();
+        protected abstract static function createFIELDS();
+
+        /**
+         * Provides the modifiable fields of this object, throws an exception otherwise.
+         * Needs to be implemented by every class to specify what fields are modifiable
+         * in each state.
+         */
+        protected abstract function getModifiableFields();
+
+        /**
+         * Returns whether the object is removable in its current state. Needs to be 
+         * implemented by every class.
+         */
+//      protected abstract function isRemovable();
+
 
     // instance fields
 
     private $uid = null;
-    private $uri = null;
+        private $uri = null;
     private $values = array();
 
@@ -77 +91 @@
     public function getType() {
         return static::TYPE();
-    }
+        }
 
     // PHP magic functions to expose values
@@ -97 +111 @@
             throw new Exception("Field " . $name . " not defined on " . self::TYPE());
         }
-    }
+        }
 
     private function get_field($name) {
@@ -119 +133 @@
 
     public function __set($name, $value) {
-        self::ensure_field($name);
+                self::ensure_field($name);
         $this->values[$name] = $value;
     }
 
     public function __unset($name) {
-        unset($this->values[$name]);
+            unset($this->values[$name]);
     }
 
@@ -162 +176 @@
     }
 
-    protected function evaluate() {
+        protected function evaluate() {
+                $realClass = self::TYPE();
+                $oldResults = $realClass::get(array("uid" => $this->uid));
         foreach (static::FIELDS() as $name => $field) {
             if ($field->required()
-                    && (!is_set($this->values[$name])
+                    && (!isset($this->values[$name])
                     || ( $field->multiple() && empty($this->values[$name]) ) )) {
                 throw new Exception("Required field $name not found.");
-            }
+                        }
+                        if (!empty($oldResults) 
+                                && $this->values[$name] != $oldResults[0]->values[$name] 
+                                && !in_array($name, $this->getModifiableFields()))      
+                        {
+                                $state = "";
+                                if(isset($this->values[$state]))
+                                        $state = $this->values[$state];
+                                throw new Exception("Field " . $name . " is not modifiable on type " . $realClass . " in current state " . $state);
+                        }
+
         }
     }
@@ -174 +200 @@
     public function save() {
         $this->evaluate();
-
+                
         $model = self::get_model();
 
         // create new resource and remove old saved resource
-        $resource = new Resource($this->uri);
+                $resource = new Resource($this->uri);
         $model->subtract($model->find($resource, null, null));
 
@@ -259 +285 @@
                     }
                 }
-                $info = self::resourceUriToTypeAndUid($uri);
+                                $info = self::resourceUriToTypeAndUid($uri);
                 $objects[] = new $realClass($info['uid'], $values);
             }
@@ -423 +449 @@
 }
 
+class RdfInteger implements RdfType {
+        static function save($model, $resource, $name, $value) {
+                $model->add(new Statement($resource, new Resource(RDfObject::PREDICATES_NS . $name),
+                        new Literal($value)));
+        }
+        static function load($value) {
+                return (int) $value->label;
+        }
+        static function predicate($name, $value) {
+                return 'str(?' . $name .') = "' . $value . '"';
+        }
+}
+
+function RdfInteger() {
+        return new RdfInteger();
+}
+
 class RdfReference implements RdfType {
 
@@ -454 +497 @@
             'values' => RdfField(RdfString(), array(RdfField::MULTIPLE))
         );
-    }
-
+        }
+
+        protected function getModifiableFields() {
+                return array('question', 'values');
+        }
 }
 
@@ -467 +513 @@
             'answers' => RdfField(RdfReference(), array(RdfField::MULTIPLE))
         );
-    }
-
+        }
+
+        protected function getModifiableFields() {
+                return array('survey', 'respondent', 'answers');
+        }
 }
 
@@ -479 +528 @@
             'style' => RdfField(RdfString())
         );
-    }
-
+        }
+
+        protected function getModifiableFields() {
+                return array('title', 'description', 'style');
+        }
 }
 
@@ -493 +545 @@
         );
     }
+        protected function getModifiableFields() {
+                return array();
+        }
 
 }
@@ -508 +563 @@
         );
     }
+        protected function getModifiableFields() {
+                return array();
+        }
 
 }
@@ -521 +579 @@
         );
     }
+        protected function getModifiableFields() {
+                switch($this->getState())
+                {
+                        case 0: return array('title', 'pipeline');
+                        case 1: return array('title');
+                }
+        }
 
 }
@@ -539 +604 @@
         );
     }
+        protected function getModifiableFields() {
+                return array();
+        }
 
 }
@@ -552 +620 @@
         );
     }
+        protected function getModifiableFields() {
+                switch($this->getState())
+                {
+                        case 0: return array('title', 'description', 'creator', 'questions');
+                        case 1: return array('title', 'description', 'questions');
+                        default: return array('title', 'description');
+                }
+        }
 
 }
@@ -567 +643 @@
         );
     }
+        protected function getModifiableFields() {
+                return array();
+        }
 
 }
@@ -579 +658 @@
         );
     }
+        protected function getModifiableFields() {
+                return array('passwordHash', 'passwordSalt');
+        }
 
 }