Add more useful methods on Doctrine\Common\Persistence\Mapping\ClassM…

…etadata interface

lib/Doctrine/Common/Persistence/Mapping/ClassMetadata.php

@@ -32,8 +32,10 @@ interface ClassMetadata
 {
     /**
      * Gets the mapped identifier field name.
+     * 
+     * The returned structure is an array of the identifier field names.
      *
-     * @return mixed
+     * @return array
      */
     public function getIdentifier();
 
@@ -83,4 +85,41 @@ public function isSingleValuedAssociation($fieldName);
      * @return boolean
      */
     public function isCollectionValuedAssociation($fieldName);
+
+    /**
+     * A numerically indexed list of field names of this persistent class.
+     * 
+     * This array includes identifier fields if present on this class.
+     * 
+     * @return array
+     */
+    public function getFieldNames();
+
+    /**
+     * A numerically indexed list of association names of this persistent class.
+     * 
+     * This array includes identifier associations if present on this class.
+     * 
+     * @return array
+     */
+    public function getAssociationNames();
+
+    /**
+     * Returns a type name of this field.
+     * 
+     * This type names can be implementation specific but should at least include the php types:
+     * integer, string, boolean, float/double, datetime.
+     * 
+     * @param string $fieldName
+     * @return string
+     */
+    public function getTypeOfField($fieldName);
+
+    /**
+     * Returns the target class name of the given association.
+     * 
+     * @param string $assocName
+     * @return string
+     */
+    public function getAssociationTargetClass($assocName);
 }