diff --git a/Doctrine/AbstractLookup.php b/Doctrine/AbstractLookup.php
new file mode 100644
index 0000000..6560bab
--- /dev/null
+++ b/Doctrine/AbstractLookup.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace FOS\ElasticaBundle\Doctrine;
+
+use Doctrine\Common\Persistence\ManagerRegistry;
+use FOS\ElasticaBundle\Type\LookupInterface;
+
+abstract class AbstractLookup implements LookupInterface
+{
+    /**
+     * @var \Doctrine\Common\Persistence\ManagerRegistry
+     */
+    protected $registry;
+
+    /**
+     * @param ManagerRegistry $registry
+     */
+    public function __construct(ManagerRegistry $registry)
+    {
+        $this->registry = $registry;
+    }
+}
diff --git a/Doctrine/MongoDB/Lookup.php b/Doctrine/MongoDB/Lookup.php
new file mode 100644
index 0000000..6c48759
--- /dev/null
+++ b/Doctrine/MongoDB/Lookup.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace FOS\ElasticaBundle\Doctrine\MongoDB;
+
+use FOS\ElasticaBundle\Doctrine\AbstractLookup;
+use FOS\ElasticaBundle\Type\TypeConfigurationInterface;
+
+class Lookup extends AbstractLookup
+{
+    /**
+     * Returns the lookup key.
+     *
+     * @return string
+     */
+    public function getKey()
+    {
+        return 'mongodb';
+    }
+
+    /**
+     * Look up objects of a specific type with ids as supplied.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param array $ids
+     * @return array
+     */
+    public function lookup(TypeConfigurationInterface $configuration, array $ids)
+    {
+        $qb = $this->createQueryBuilder($configuration);
+        $qb->hydrate($configuration->isHydrate());
+
+        $qb->field($configuration->getIdentifierProperty())
+            ->in($ids);
+
+        return $qb->getQuery()->execute()->toArray();
+    }
+
+    /**
+     * @param TypeConfigurationInterface $configuration
+     * @return \Doctrine\ODM\MongoDB\Query\Builder
+     */
+    private function createQueryBuilder(TypeConfigurationInterface $configuration)
+    {
+        $method = $configuration->getRepositoryMethod();
+        $manager = $this->registry->getManagerForClass($configuration->getModelClass());
+
+        return $manager->{$method}($configuration->getModelClass());
+    }
+}
diff --git a/Doctrine/ORM/Lookup.php b/Doctrine/ORM/Lookup.php
new file mode 100644
index 0000000..2e2cfe3
--- /dev/null
+++ b/Doctrine/ORM/Lookup.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace FOS\ElasticaBundle\Doctrine\ORM;
+
+use Doctrine\ORM\Query;
+use FOS\ElasticaBundle\Doctrine\AbstractLookup;
+use FOS\ElasticaBundle\Type\TypeConfigurationInterface;
+
+class Lookup extends AbstractLookup
+{
+    const ENTITY_ALIAS = 'o';
+
+    /**
+     * Returns the lookup key.
+     *
+     * @return string
+     */
+    public function getKey()
+    {
+        return 'orm';
+    }
+
+    /**
+     * Look up objects of a specific type with ids as supplied.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param array $ids
+     * @return array
+     */
+    public function lookup(TypeConfigurationInterface $configuration, array $ids)
+    {
+        $hydrationMode = $configuration->isHydrate() ?
+            Query::HYDRATE_OBJECT :
+            Query::HYDRATE_ARRAY;
+
+        $qb = $this->createQueryBuilder($configuration);
+
+        $qb->andWhere($qb->expr()->in(
+            sprintf('%s.%s', static::ENTITY_ALIAS, $configuration->getIdentifierProperty()),
+            ':identifiers'
+        ));
+        $qb->setParameter('identifiers', $ids);
+
+        return $qb->getQuery()->execute(array(), $hydrationMode);
+    }
+
+    /**
+     * @param TypeConfigurationInterface $configuration
+     * @return \Doctrine\ORM\QueryBuilder
+     */
+    private function createQueryBuilder(TypeConfigurationInterface $configuration)
+    {
+        $repository = $this->registry->getRepository($configuration->getModelClass());
+        $method = $configuration->getRepositoryMethod();
+
+        return $repository->{$method}(static::ENTITY_ALIAS);
+    }
+}
diff --git a/Elastica/LoggingClient.php b/Elastica/LoggingClient.php
index 0ff1997..faecdfc 100644
--- a/Elastica/LoggingClient.php
+++ b/Elastica/LoggingClient.php
@@ -5,6 +5,7 @@ namespace FOS\ElasticaBundle\Elastica;
 use Elastica\Client as Client;
 use Elastica\Request;
 use FOS\ElasticaBundle\Logger\ElasticaLogger;
+use FOS\ElasticaBundle\Transformer\CombinedResultTransformer;
 
 /**
  * Extends the default Elastica client to provide logging for errors that occur
@@ -14,6 +15,38 @@ use FOS\ElasticaBundle\Logger\ElasticaLogger;
  */
 class LoggingClient extends Client
 {
+    /**
+     * @var CombinedResultTransformer
+     */
+    private $resultTransformer;
+
+    public function __construct(array $config = array(), $callback = null, CombinedResultTransformer $resultTransformer)
+    {
+        parent::__construct($config, $callback);
+
+        $this->resultTransformer = $resultTransformer;
+    }
+
+    /**
+     * Overridden Elastica method to return TransformingIndex instances instead of the
+     * default Index instances.
+     *
+     * @param string $name
+     * @return TransformingIndex
+     */
+    public function getIndex($name)
+    {
+        return new TransformingIndex($this, $name, $this->resultTransformer);
+    }
+
+    /**
+     * @return CombinedResultTransformer
+     */
+    public function getResultTransformer()
+    {
+        return $this->resultTransformer;
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -39,9 +72,4 @@ class LoggingClient extends Client
 
         return $response;
     }
-
-    public function getIndex($name)
-    {
-        return new DynamicIndex($this, $name);
-    }
 }
diff --git a/Elastica/TransformingIndex.php b/Elastica/TransformingIndex.php
index a0cc001..2bab636 100644
--- a/Elastica/TransformingIndex.php
+++ b/Elastica/TransformingIndex.php
@@ -1,8 +1,11 @@
 <?php
 
-namespace FOS\ElasticaBundle\Index;
+namespace FOS\ElasticaBundle\Elastica;
 
+use Elastica\Client;
+use Elastica\Exception\InvalidException;
 use Elastica\Index;
+use FOS\ElasticaBundle\Transformer\CombinedResultTransformer;
 
 /**
  * Overridden Elastica Index class that provides dynamic index name changes
@@ -14,20 +17,32 @@ use Elastica\Index;
 class TransformingIndex extends Index
 {
     /**
-     * Indexes a
-     * @param  string $query
-     * @param  int|array $options
-     * @return \Elastica\Search
+     * Creates a TransformingSearch instance instead of the default Elastica Search
+     *
+     * @param string $query
+     * @param int|array $options
+     * @return TransformingSearch
      */
     public function createSearch($query = '', $options = null)
     {
-        $search = new Search($this->getClient());
+        $search = new TransformingSearch($this->getClient());
         $search->addIndex($this);
         $search->setOptionsAndQuery($options, $query);
 
         return $search;
     }
 
+    /**
+     * Returns a type object for the current index with the given name
+     *
+     * @param  string $type Type name
+     * @return TransformingType Type object
+     */
+    public function getType($type)
+    {
+        return new TransformingType($this, $type);
+    }
+
     /**
      * Reassign index name
      *
@@ -35,8 +50,6 @@ class TransformingIndex extends Index
      * since it's used for a very specific case and normally should not be used
      *
      * @param string $name Index name
-     *
-     * @return void
      */
     public function overrideName($name)
     {
diff --git a/Elastica/TransformingResult.php b/Elastica/TransformingResult.php
new file mode 100644
index 0000000..08d09bc
--- /dev/null
+++ b/Elastica/TransformingResult.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace FOS\ElasticaBundle\Elastica;
+
+use Elastica\Result;
+
+class TransformingResult extends Result
+{
+    /**
+     * The transformed hit.
+     *
+     * @var mixed
+     */
+    private $transformed;
+
+    /**
+     * @var TransformingResultSet
+     */
+    private $resultSet;
+
+    public function __construct(array $hit, TransformingResultSet $resultSet)
+    {
+        parent::__construct($hit);
+
+        $this->resultSet = $resultSet;
+    }
+
+    /**
+     * Returns the transformed result of the hit.
+     *
+     * @return mixed
+     */
+    public function getTransformed()
+    {
+        if (null === $this->transformed) {
+            $this->resultSet->transform();
+        }
+
+        return $this->transformed;
+    }
+
+    /**
+     * An internal method used to set the transformed result on the Result.
+     *
+     * @internal
+     */
+    public function setTransformed($transformed)
+    {
+        $this->transformed = $transformed;
+    }
+}
diff --git a/Elastica/TransformingResultSet.php b/Elastica/TransformingResultSet.php
new file mode 100644
index 0000000..c775cd3
--- /dev/null
+++ b/Elastica/TransformingResultSet.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace FOS\ElasticaBundle\Elastica;
+
+use Elastica\Query;
+use Elastica\Response;
+use Elastica\ResultSet;
+use FOS\ElasticaBundle\Transformer\CombinedResultTransformer;
+use FOS\ElasticaBundle\Transformer\TransformerFactoryInterface;
+
+class TransformingResultSet extends ResultSet
+{
+    /**
+     * @var \FOS\ElasticaBundle\Transformer\CombinedResultTransformer
+     */
+    private $resultTransformer;
+
+    /**
+     * If a transformation has already been performed on this ResultSet or not.
+     *
+     * @var bool
+     */
+    private $transformed = false;
+
+    public function __construct(Response $response, Query $query, CombinedResultTransformer $resultTransformer)
+    {
+        parent::__construct($response, $query);
+
+        $this->resultTransformer = $resultTransformer;
+    }
+
+    /**
+     * Overridden default method to set our TransformingResult objects.
+     *
+     * @param \Elastica\Response $response Response object
+     */
+    protected function _init(Response $response)
+    {
+        $this->_response = $response;
+        $result = $response->getData();
+        $this->_totalHits = isset($result['hits']['total']) ? $result['hits']['total'] : 0;
+        $this->_maxScore = isset($result['hits']['max_score']) ? $result['hits']['max_score'] : 0;
+        $this->_took = isset($result['took']) ? $result['took'] : 0;
+        $this->_timedOut = !empty($result['timed_out']);
+        if (isset($result['hits']['hits'])) {
+            foreach ($result['hits']['hits'] as $hit) {
+                $this->_results[] = new TransformingResult($hit, $this);
+            }
+        }
+    }
+
+    /**
+     * Returns an array of transformed results.
+     *
+     * @return object[]
+     */
+    public function getTransformed()
+    {
+        $this->transform();
+
+        return array_map(function (TransformingResult $result) {
+            return $result->getTransformed();
+        }, $this->getResults());
+    }
+
+    /**
+     * Triggers the transformation of all Results.
+     */
+    public function transform()
+    {
+        if ($this->transformed) {
+            return;
+        }
+
+        if (!$this->count()) {
+            return;
+        }
+
+        $this->resultTransformer->transform($this->getResults());
+        $this->transformed = true;
+    }
+}
diff --git a/Elastica/TransformingSearch.php b/Elastica/TransformingSearch.php
new file mode 100644
index 0000000..eee1a96
--- /dev/null
+++ b/Elastica/TransformingSearch.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace FOS\ElasticaBundle\Elastica;
+
+use Elastica\Client;
+use Elastica\Request;
+use Elastica\Search;
+use FOS\ElasticaBundle\Transformer\CombinedResultTransformer;
+
+/**
+ * Overridden Elastica methods to return our TransformingResultSet
+ */
+class TransformingSearch extends Search
+{
+    /**
+     * Search in the set indices, types
+     *
+     * @param  mixed $query
+     * @param  int|array $options OPTIONAL Limit or associative array of options (option=>value)
+     * @throws \Elastica\Exception\InvalidException
+     * @return TransformingResultSet
+     */
+    public function search($query = '', $options = null)
+    {
+        $this->setOptionsAndQuery($options, $query);
+
+        $query = $this->getQuery();
+        $path = $this->getPath();
+
+        $params = $this->getOptions();
+
+        // Send scroll_id via raw HTTP body to handle cases of very large (> 4kb) ids.
+        if ('_search/scroll' == $path) {
+            $data = $params[self::OPTION_SCROLL_ID];
+            unset($params[self::OPTION_SCROLL_ID]);
+        } else {
+            $data = $query->toArray();
+        }
+
+        $response = $this->getClient()->request(
+            $path,
+            Request::GET,
+            $data,
+            $params
+        );
+
+        return new TransformingResultSet($response, $query, $this->_client->getResultTransformer());
+    }
+
+    /**
+     *
+     * @param mixed $query
+     * @param $fullResult (default = false) By default only the total hit count is returned. If set to true, the full ResultSet including facets is returned.
+     * @return int|TransformingResultSet
+     */
+    public function count($query = '', $fullResult = false)
+    {
+        $this->setOptionsAndQuery(null, $query);
+
+        $query = $this->getQuery();
+        $path = $this->getPath();
+
+        $response = $this->getClient()->request(
+            $path,
+            Request::GET,
+            $query->toArray(),
+            array(self::OPTION_SEARCH_TYPE => self::OPTION_SEARCH_TYPE_COUNT)
+        );
+        $resultSet = new TransformingResultSet($response, $query, $this->_client->getResultTransformer());
+
+        return $fullResult ? $resultSet : $resultSet->getTotalHits();
+    }
+}
diff --git a/Elastica/TransformingType.php b/Elastica/TransformingType.php
new file mode 100644
index 0000000..f359c24
--- /dev/null
+++ b/Elastica/TransformingType.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace FOS\ElasticaBundle\Elastica;
+
+use Elastica\Document;
+use Elastica\Query;
+use Elastica\Request;
+use Elastica\Type;
+
+class TransformingType extends Type
+{
+    /**
+     * Overridden default method that returns our TransformingResultSet.
+     *
+     * {@inheritdoc}
+     */
+    public function moreLikeThis(Document $doc, $params = array(), $query = array())
+    {
+        $path = $doc->getId() . '/_mlt';
+        $query = Query::create($query);
+        $response = $this->request($path, Request::GET, $query->toArray(), $params);
+
+        return new TransformingResultSet($response, $query, $this->_index->getClient()->getResultTransformer());
+    }
+}
diff --git a/Exception/MissingModelException.php b/Exception/MissingModelException.php
new file mode 100644
index 0000000..cfbb750
--- /dev/null
+++ b/Exception/MissingModelException.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace FOS\ElasticaBundle\Exception;
+
+use Exception;
+
+class MissingModelException extends \Exception
+{
+    public function __construct($modelCount, $resultCount)
+    {
+        $message = sprintf('Expected to have %d models, but the lookup returned %d results', $resultCount, $modelCount);
+
+        parent::__construct($message);
+    }
+}
diff --git a/Exception/UnexpectedObjectException.php b/Exception/UnexpectedObjectException.php
new file mode 100644
index 0000000..afe671d
--- /dev/null
+++ b/Exception/UnexpectedObjectException.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace FOS\ElasticaBundle\Exception;
+
+use Exception;
+
+class UnexpectedObjectException extends \Exception
+{
+    public function __construct($id)
+    {
+        parent::__construct(sprintf('Lookup returned an unknown object with id %d', $id));
+    }
+}
diff --git a/Propel/Lookup.php b/Propel/Lookup.php
new file mode 100644
index 0000000..61e4c94
--- /dev/null
+++ b/Propel/Lookup.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace FOS\ElasticaBundle\Propel;
+
+use Doctrine\Common\Util\Inflector;
+use FOS\ElasticaBundle\Type\LookupInterface;
+use FOS\ElasticaBundle\Type\TypeConfigurationInterface;
+
+class Lookup implements LookupInterface
+{
+    /**
+     * Returns the lookup key.
+     *
+     * @return string
+     */
+    public function getKey()
+    {
+        return 'propel';
+    }
+
+    /**
+     * Look up objects of a specific type with ids as supplied.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param int[] $ids
+     * @return object[]
+     */
+    public function lookup(TypeConfigurationInterface $configuration, array $ids)
+    {
+        $query = $this->createQuery($configuration, $ids);
+
+        if (!$configuration->isHydrate()) {
+            return $query->toArray();
+        }
+
+        return $query->find();
+    }
+
+    /**
+     * Create a query to use in the findByIdentifiers() method.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param array $ids
+     * @return \ModelCriteria
+     */
+    protected function createQuery(TypeConfigurationInterface $configuration, array $ids)
+    {
+        $queryClass = $configuration->getModelClass() . 'Query';
+        $query = $queryClass::create();
+        $filterMethod = 'filterBy' . Inflector::camelize($configuration->getIdentifierProperty());
+
+        return $query->$filterMethod($ids);
+    }
+}
diff --git a/Tests/Elastica/LoggingClientTest.php b/Tests/Elastica/LoggingClientTest.php
index b08a2cf..0b3e71d 100644
--- a/Tests/Elastica/LoggingClientTest.php
+++ b/Tests/Elastica/LoggingClientTest.php
@@ -4,9 +4,33 @@ namespace FOS\ElasticaBundle\Tests\Client;
 
 use Elastica\Request;
 use Elastica\Transport\Null as NullTransport;
+use FOS\ElasticaBundle\Elastica\LoggingClient;
 
 class LoggingClientTest extends \PHPUnit_Framework_TestCase
 {
+    public function testOverriddenElasticaMethods()
+    {
+        $resultTransformer = $this->getMockBuilder('FOS\ElasticaBundle\Transformer\CombinedResultTransformer')
+            ->disableOriginalConstructor()
+            ->getMock();
+        $client = new LoggingClient(array(), null, $resultTransformer);
+        $index = $client->getIndex('index');
+        $type = $index->getType('type');
+
+        $this->assertInstanceOf('FOS\ElasticaBundle\Elastica\TransformingIndex', $index);
+        $this->assertInstanceOf('FOS\ElasticaBundle\Elastica\TransformingType', $type);
+    }
+
+    public function testGetResultTransformer()
+    {
+        $resultTransformer = $this->getMockBuilder('FOS\ElasticaBundle\Transformer\CombinedResultTransformer')
+            ->disableOriginalConstructor()
+            ->getMock();
+        $client = new LoggingClient(array(), null, $resultTransformer);
+
+        $this->assertSame($resultTransformer, $client->getResultTransformer());
+    }
+
     public function testRequestsAreLogged()
     {
         $transport = new NullTransport;
@@ -29,6 +53,7 @@ class LoggingClientTest extends \PHPUnit_Framework_TestCase
             );
 
         $client = $this->getMockBuilder('FOS\ElasticaBundle\Elastica\LoggingClient')
+            ->disableOriginalConstructor()
             ->setMethods(array('getConnection'))
             ->getMock();
 
diff --git a/Tests/Elastica/TransformingIndexTest.php b/Tests/Elastica/TransformingIndexTest.php
new file mode 100644
index 0000000..e652119
--- /dev/null
+++ b/Tests/Elastica/TransformingIndexTest.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace FOS\ElasticaBundle\Tests\Client;
+
+use FOS\ElasticaBundle\Elastica\TransformingIndex;
+
+class TransformingIndexTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var \FOS\ElasticaBundle\Elastica\TransformingIndex
+     */
+    private $index;
+
+    /**
+     * @var \FOS\ElasticaBundle\Elastica\LoggingClient
+     */
+    private $client;
+
+    public function testCreateSearch()
+    {
+        $search = $this->index->createSearch();
+
+        $this->assertInstanceOf('FOS\ElasticaBundle\Elastica\TransformingSearch', $search);
+    }
+
+    public function testOverrideName()
+    {
+        $this->assertEquals('testindex', $this->index->getName());
+
+        $this->index->overrideName('newindex');
+
+        $this->assertEquals('newindex', $this->index->getName());
+    }
+
+    protected function setUp()
+    {
+        $this->client = $this->getMockBuilder('FOS\ElasticaBundle\Elastica\LoggingClient')
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->index = new TransformingIndex($this->client, 'testindex');
+    }
+}
diff --git a/Tests/Elastica/TransformingResultSetTest.php b/Tests/Elastica/TransformingResultSetTest.php
new file mode 100644
index 0000000..9b9b38a
--- /dev/null
+++ b/Tests/Elastica/TransformingResultSetTest.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace FOS\ElasticaBundle\Tests\Client;
+
+use Elastica\Query;
+use Elastica\Response;
+use FOS\ElasticaBundle\Elastica\TransformingResult;
+use FOS\ElasticaBundle\Elastica\TransformingResultSet;
+
+class TransformingResultSetTest extends \PHPUnit_Framework_TestCase
+{
+    public function testTransformingResult()
+    {
+        $response = new Response(array('hits' => array(
+            'hits' => array(
+                array(),
+                array(),
+                array(),
+            )
+        )));
+        $query = new Query();
+        $transformer = $this->getMockBuilder('FOS\ElasticaBundle\Transformer\CombinedResultTransformer')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $resultSet = new TransformingResultSet($response, $query, $transformer);
+
+        $this->assertCount(3, $resultSet);
+        $this->assertInstanceOf('FOS\ElasticaBundle\Elastica\TransformingResult', $resultSet[0]);
+
+        $transformer->expects($this->once())
+            ->method('transform')
+            ->with($resultSet->getResults());
+
+        $resultSet->transform();
+        $resultSet->transform();
+
+        $this->assertSame(array(
+            0 => null, 1 => null, 2 => null
+        ), $resultSet->getTransformed());
+    }
+}
diff --git a/Tests/Elastica/TransformingResultTest.php b/Tests/Elastica/TransformingResultTest.php
new file mode 100644
index 0000000..286b7d1
--- /dev/null
+++ b/Tests/Elastica/TransformingResultTest.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace FOS\ElasticaBundle\Tests\Client;
+
+use FOS\ElasticaBundle\Elastica\TransformingResult;
+
+class TransformingResultTest extends \PHPUnit_Framework_TestCase
+{
+    public function testTransformingResult()
+    {
+        $resultSet = $this->getMockBuilder('FOS\ElasticaBundle\Elastica\TransformingResultSet')
+            ->disableOriginalConstructor()
+            ->getMock();
+        $result = new TransformingResult(array(), $resultSet);
+
+        $resultSet->expects($this->exactly(2))
+            ->method('transform');
+
+        $result->getTransformed();
+        $result->getTransformed();
+    }
+}
diff --git a/Transformer/CombinedResultTransformer.php b/Transformer/CombinedResultTransformer.php
new file mode 100644
index 0000000..791e601
--- /dev/null
+++ b/Transformer/CombinedResultTransformer.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace FOS\ElasticaBundle\Transformer;
+
+use FOS\ElasticaBundle\Elastica\TransformingResult;
+
+/**
+ * Transforms results from an index wide query with multiple types.
+ *
+ * @author Tim Nagel <tim@nagel.com.au>
+ */
+class CombinedResultTransformer
+{
+    /**
+     * @var \FOS\ElasticaBundle\Type\TypeConfigurationInterface
+     */
+    private $configurations;
+
+    /**
+     * @var ResultTransformerInterface
+     */
+    private $transformer;
+
+    /**
+     * @param \FOS\ElasticaBundle\Type\TypeConfigurationInterface[] $configurations
+     * @param ResultTransformerInterface $transformer
+     */
+    public function __construct(array $configurations, ResultTransformerInterface $transformer)
+    {
+        $this->configurations = $configurations;
+        $this->transformer = $transformer;
+    }
+
+    /**
+     * Transforms Elastica results into Models.
+     *
+     * @param TransformingResult[] $results
+     * @return object[]
+     */
+    public function transform($results)
+    {
+        $grouped = array();
+
+        foreach ($results as $result) {
+            $grouped[$result->getType()][] = $result;
+        }
+
+        foreach ($grouped as $type => $group) {
+            $this->transformer->transform($this->getConfiguration($type), $group);
+        }
+    }
+
+    /**
+     * Retrieves the transformer for a given type.
+     *
+     * @param string $type
+     * @return \FOS\ElasticaBundle\Type\TypeConfigurationInterface
+     * @throws \InvalidArgumentException
+     */
+    private function getConfiguration($type)
+    {
+        if (!array_key_exists($type, $this->configurations)) {
+            throw new \InvalidArgumentException(sprintf(
+                'Configuration for type "%s" is not registered with this combined transformer.',
+                $type
+            ));
+        }
+
+        return $this->configurations[$type];
+    }
+}
diff --git a/Transformer/ResultTransformer.php b/Transformer/ResultTransformer.php
new file mode 100644
index 0000000..68b9364
--- /dev/null
+++ b/Transformer/ResultTransformer.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace FOS\ElasticaBundle\Transformer;
+
+use FOS\ElasticaBundle\Exception\MissingModelException;
+use FOS\ElasticaBundle\Exception\UnexpectedObjectException;
+use FOS\ElasticaBundle\Type\LookupManager;
+use FOS\ElasticaBundle\Type\TypeConfigurationInterface;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
+
+/**
+ * Handles transforming results into models.
+ */
+class ResultTransformer implements ResultTransformerInterface
+{
+    /**
+     * @var \FOS\ElasticaBundle\Type\LookupManager
+     */
+    private $lookupManager;
+
+    /**
+     * @var \Symfony\Component\PropertyAccess\PropertyAccessorInterface
+     */
+    private $propertyAccessor;
+
+    public function __construct(
+        LookupManager $lookupManager,
+        PropertyAccessorInterface $propertyAccessor
+    ) {
+        $this->lookupManager = $lookupManager;
+        $this->propertyAccessor = $propertyAccessor;
+    }
+
+    /**
+     * Transforms Elastica results into Models.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param \FOS\ElasticaBundle\Elastica\TransformingResult[] $results
+     * @throws \FOS\ElasticaBundle\Exception\MissingModelException
+     * @throws \FOS\ElasticaBundle\Exception\UnexpectedObjectException
+     */
+    public function transform(TypeConfigurationInterface $configuration, $results)
+    {
+        $results = $this->processResults($results);
+        $lookup = $this->lookupManager->getLookup($configuration->getType());
+        $objects = $lookup->lookup($configuration, array_keys($results));
+
+        if (!$configuration->isIgnoreMissing() and count($objects) < count($results)) {
+            throw new MissingModelException(count($objects), count($results));
+        }
+
+        $identifierProperty = $configuration->getIdentifierProperty();
+        foreach ($objects as $object) {
+            $id = $this->propertyAccessor->getValue($object, $identifierProperty);
+
+            if (!array_key_exists($id, $results)) {
+                throw new UnexpectedObjectException($id);
+            }
+
+            $results[$id]->setTransformed($object);
+        }
+    }
+
+    /**
+     * Processes the results array into a more usable format for the transformation.
+     *
+     * @param \FOS\ElasticaBundle\Elastica\TransformingResult[] $results
+     * @return \FOS\ElasticaBundle\Elastica\TransformingResult[]
+     */
+    private function processResults($results)
+    {
+        $sorted = array();
+        foreach ($results as $result) {
+            $sorted[$result->getId()] = $result;
+        }
+
+        return $sorted;
+    }
+}
diff --git a/Transformer/ResultTransformerInterface.php b/Transformer/ResultTransformerInterface.php
new file mode 100644
index 0000000..c18fc7c
--- /dev/null
+++ b/Transformer/ResultTransformerInterface.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace FOS\ElasticaBundle\Transformer;
+
+use FOS\ElasticaBundle\Type\TypeConfigurationInterface;
+
+interface ResultTransformerInterface
+{
+    /**
+     * Transforms Elastica results into Models.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param array $results
+     */
+    public function transform(TypeConfigurationInterface $configuration, $results);
+}
diff --git a/Type/LookupInterface.php b/Type/LookupInterface.php
new file mode 100644
index 0000000..c956511
--- /dev/null
+++ b/Type/LookupInterface.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace FOS\ElasticaBundle\Type;
+
+/**
+ * A service that provides lookup capabilities for a type.
+ *
+ * @author Tim Nagel <tim@nagel.com.au>
+ */
+interface LookupInterface
+{
+    /**
+     * Returns the lookup key.
+     *
+     * @return string
+     */
+    public function getKey();
+
+    /**
+     * Look up objects of a specific type with ids as supplied.
+     *
+     * @param TypeConfigurationInterface $configuration
+     * @param int[] $ids
+     * @return object[]
+     */
+    public function lookup(TypeConfigurationInterface $configuration, array $ids);
+}
diff --git a/Type/LookupManager.php b/Type/LookupManager.php
new file mode 100644
index 0000000..0db0fd1
--- /dev/null
+++ b/Type/LookupManager.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace FOS\ElasticaBundle\Type;
+
+class LookupManager
+{
+    /**
+     * @var LookupInterface[]
+     */
+    private $lookups = array();
+
+    /**
+     * @param LookupInterface[] $lookups
+     */
+    public function __construct($lookups)
+    {
+        foreach ($lookups as $lookup) {
+            $this->lookups[$lookup->getKey()] = $lookup;
+        }
+    }
+
+
+    /**
+     * @param string $type
+     * @return LookupInterface
+     * @throws \InvalidArgumentException
+     */
+    public function getLookup($type)
+    {
+        if (!array_key_exists($type, $this->lookups)) {
+            throw new \InvalidArgumentException(sprintf('Lookup with key "%s" does not exist', $type));
+        }
+
+        return $this->lookups[$type];
+    }
+}
diff --git a/Type/TypeConfigurationInterface.php b/Type/TypeConfigurationInterface.php
new file mode 100644
index 0000000..bee3388
--- /dev/null
+++ b/Type/TypeConfigurationInterface.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace FOS\ElasticaBundle\Type;
+
+/**
+ * A data object that contains configuration information about a specific type.
+ *
+ * @author Tim Nagel <tim@nagel.com.au>
+ */
+interface TypeConfigurationInterface
+{
+    /**
+     * The identifier property that is used to retrieve an identifier from the model.
+     *
+     * @return string
+     */
+    public function getIdentifierProperty();
+
+    /**
+     * Returns the fully qualified class for the model that this type represents.
+     *
+     * @return string
+     */
+    public function getModelClass();
+
+    /**
+     * Returns the repository method that will create a query builder or associated
+     * query object for lookup purposes.
+     *
+     * @return string
+     */
+    public function getRepositoryMethod();
+
+    /**
+     * Returns the name of the type.
+     *
+     * @return string
+     */
+    public function getType();
+
+    /**
+     * If the lookup should hydrate models to objects or leave data as an array.
+     *
+     * @return bool
+     */
+    public function isHydrate();
+
+    /**
+     * If the type should ignore missing results from a lookup.
+     *
+     * @return bool
+     */
+    public function isIgnoreMissing();
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 8dd19b6..e827ac6 100644
--- a/composer.json
+++ b/composer.json
@@ -12,6 +12,7 @@
     ],
     "require": {
         "php": ">=5.3.2",
+        "doctrine/inflector": "~1.0",
         "symfony/framework-bundle": "~2.3",
         "symfony/console": "~2.1",
         "symfony/form": "~2.1",