1 files changed, 100 insertions, 0 deletions
diff --git a/codebase/DataStorage/DataWrapper.php b/codebase/DataStorage/DataWrapper.php
new file mode 100644
index 0000000..19158cc
--- /dev/null
+++ b/codebase/DataStorage/DataWrapper.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace DHTMLX\Connector\DataStorage;
+/*! Base abstraction class, used for data operations
+	Class abstract access to data, it is a base class to all DB wrappers
+**/
+abstract class DataWrapper{
+    protected $connection;
+    protected $config;//!< DataConfig instance
+    /*! constructor
+        @param connection
+            DB connection
+        @param config
+            DataConfig instance
+    */
+    public function __construct($connection = false,$config = false){
+        $this->config=$config;
+        $this->connection=$connection;
+    }
+
+    /*! insert record in storage
+
+        @param data
+            DataAction object
+        @param source
+            DataRequestConfig object
+    */
+    abstract function insert($data,$source);
+
+    /*! delete record from storage
+
+        @param data
+            DataAction object
+        @param source
+            DataRequestConfig object
+    */
+    abstract function delete($data,$source);
+
+    /*! update record in storage
+
+        @param data
+            DataAction object
+        @param source
+            DataRequestConfig object
+    */
+    abstract function update($data,$source);
+
+    /*! select record from storage
+
+        @param source
+            DataRequestConfig object
+    */
+    abstract function select($source);
+
+    /*! get size of storage
+
+        @param source
+            DataRequestConfig object
+    */
+    abstract function get_size($source);
+
+    /*! get all variations of field in storage
+
+        @param name
+            name of field
+        @param source
+            DataRequestConfig object
+    */
+    abstract function get_variants($name,$source);
+
+    /*! checks if there is a custom sql string for specified db operation
+
+        @param  name
+            name of DB operation
+        @param  data
+            hash of data
+        @return
+            sql string
+    */
+    public function get_sql($name,$data){
+        return ""; //custom sql not supported by default
+    }
+
+    /*! begins DB transaction
+    */
+    public function begin_transaction(){
+        throw new Exception("Data wrapper not supports transactions.");
+    }
+    /*! commits DB transaction
+    */
+    public function commit_transaction(){
+        throw new Exception("Data wrapper not supports transactions.");
+    }
+    /*! rollbacks DB transaction
+    */
+    public function rollback_transaction(){
+        throw new Exception("Data wrapper not supports transactions.");
+    }
+}
+