first import

sites/all/modules/migrate/includes/handler.inc

@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * @file
+ * Defines the base class for destination handlers.
+ */
+
+/**
+ * Abstract base class for destination handlers. Handler objects are expected
+ * to implement appropriate methods (e.g., prepare, complete, or fields).
+ */
+abstract class MigrateHandler {
+  /**
+   * List of other handler classes which should be invoked before the current one.
+   *
+   * @var array
+   */
+  protected $dependencies = array();
+  public function getDependencies() {
+    return $this->dependencies;
+  }
+
+  /**
+   * List of "types" handled by this handler. Depending on the kind of handler,
+   * these may be destination types, field types, etc.
+   *
+   * @var array
+   */
+  protected $typesHandled = array();
+  public function getTypesHandled() {
+    return $this->typesHandled;
+  }
+
+  /**
+   * Register a list of types handled by this class
+   *
+   * @param array $types
+   */
+  protected function registerTypes(array $types) {
+    // Make the type names the keys
+    foreach ($types as $type) {
+      $type = drupal_strtolower($type);
+      $this->typesHandled[$type] = $type;
+    }
+  }
+
+  /**
+   * Does this handler handle the given type?
+   *
+   * @param boolean $type
+   */
+  public function handlesType($type) {
+    return isset($this->typesHandled[strtolower($type)]);
+  }
+
+  abstract public function __construct();
+}