refactoring for dependency injection and testability.

laravel/database/query/factory.php

@@ -0,0 +1,28 @@
+<?php namespace Laravel\Database\Query;
+
+use Laravel\Database\Query;
+use Laravel\Database\Connection;
+
+class Factory {
+
+	/**
+	 * Create a new query instance based on the connection driver.
+	 *
+	 * @param  string      $table
+	 * @param  Connection  $connection
+	 * @param  Compiler    $compiler
+	 * @return Query
+	 */
+	public static function make($table, Connection $connection, Compiler $compiler)
+	{
+		switch ($connection->driver())
+		{
+			case 'pgsql':
+				return new Postgres($table, $connection, $compiler);
+
+			default:
+				return new Query($table, $connection, $compiler);
+		}
+	}
+
+}