Add support for custom ID generator in XML

doctrine-mapping.xsd

@@ -143,6 +143,7 @@
       <xs:enumeration value="SEQUENCE"/> 
       <xs:enumeration value="IDENTITY"/> 
       <xs:enumeration value="AUTO"/> 
+      <xs:enumeration value="CUSTOM" />
     </xs:restriction> 
   </xs:simpleType>
   
@@ -253,6 +254,7 @@
     <xs:sequence>
       <xs:element name="generator" type="orm:generator" minOccurs="0" />
       <xs:element name="sequence-generator" type="orm:sequence-generator" minOccurs="0" maxOccurs="1" />
+      <xs:element name="custom-generator" type="orm:custom-generator" minOccurs="0" maxOccurs="1" />
       <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:sequence>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
@@ -271,6 +273,19 @@
       <xs:attribute name="initial-value" type="xs:integer" use="optional" default="1" />
     <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
+  
+  <xs:complexType name="custom-generator">
+    <xs:sequence>
+      <xs:element name="args" minOccurs="0" maxOccurs="1">
+          <xs:complexType>
+              <xs:sequence>
+                  <xs:element name="arg" type="xs:string" minOccurs="1" maxOccurs="unbounded" />
+              </xs:sequence>
+          </xs:complexType>
+      </xs:element>
+    </xs:sequence>
+    <xs:attribute name="class" type="xs:NMTOKEN" use="required" />
+  </xs:complexType>
 
   <xs:complexType name="inverse-join-columns">
     <xs:sequence>

lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php

@@ -250,6 +250,16 @@ class XmlDriver extends AbstractFileDriver
                     'allocationSize' => (string)$seqGenerator['allocation-size'],
                     'initialValue' => (string)$seqGenerator['initial-value']
                 ));
+            } else if (isset($idElement->{'custom-generator'})) {
+                $customGenerator = $idElement->{'custom-generator'};
+                $args = array();
+                foreach ($customGenerator->args->children() as $argument) {
+                    $args[] = (string) $argument;
+                }
+                $metadata->setCustomGeneratorDefinition(array(
+                    'class' => (string) $customGenerator['class'],
+                    'args' => $args
+                ));
             } else if (isset($idElement->{'table-generator'})) {
                 throw MappingException::tableIdGeneratorNotImplemented($className);
             }

tests/Doctrine/Tests/ORM/Mapping/AbstractMappingDriverTest.php

@@ -88,6 +88,18 @@ abstract class AbstractMappingDriverTest extends \Doctrine\Tests\OrmTestCase
             $class->sequenceGeneratorDefinition
         );
     }
+    
+    public function testEntityCustomGenerator()
+    {
+        $class = $this->createClassMetadata('Doctrine\Tests\ORM\Mapping\Animal');
+        
+        $this->assertEquals(ClassMetadata::GENERATOR_TYPE_CUSTOM, 
+            $class->generatorType, "Generator Type");
+        $this->assertEquals(
+            array("class" => "stdClass", "args" => array("par1", "par2")),
+            $class->customGeneratorDefinition,
+            "Custom Generator Definition");
+    }
 
 
     /**

tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.Animal.dcm.xml

@@ -8,5 +8,14 @@
             <discriminator-mapping value="cat" class="Cat" />
             <discriminator-mapping value="dog" class="Dog" />
         </discriminator-map>
+        <id name="id" type="integer" column="id">
+            <generator strategy="CUSTOM"/>
+            <custom-generator class="stdClass">
+                <args>
+                    <arg>par1</arg>
+                    <arg>par2</arg>
+                </args>
+            </custom-generator>
+        </id>
     </entity>
 </doctrine-mapping>