introduced another convenience method.

See http://www.nabble.com/No-arg-Descriptor-constructor-td22154193.html

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@15773 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Hudson.java

@@ -1654,6 +1654,19 @@ public final class Hudson extends Node implements ItemGroup<TopLevelItem>, Stapl
         return item;
     }
 
+    /**
+     * Creates a new job.
+     *
+     * <p>
+     * This version infers the descriptor from the type of the top-level item.
+     *
+     * @throws IllegalArgumentException
+     *      if the project of the given name already exists.
+     */
+    public synchronized <T extends TopLevelItem> T createProject( Class<T> type, String name ) throws IOException {
+        return type.cast(createProject((TopLevelItemDescriptor)getDescriptor(type),name));
+    }
+
     /**
      * Called in response to {@link Job#doDoDelete(StaplerRequest, StaplerResponse)}
      */

test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java

@@ -356,7 +356,7 @@ public abstract class HudsonTestCase extends TestCase {
     }
 
     protected FreeStyleProject createFreeStyleProject(String name) throws IOException {
-        return (FreeStyleProject)hudson.createProject(FreeStyleProject.DESCRIPTOR,name);
+        return hudson.createProject(FreeStyleProject.class,name);
     }
 
     protected MatrixProject createMatrixProject() throws IOException {
@@ -364,7 +364,7 @@ public abstract class HudsonTestCase extends TestCase {
     }
 
     protected MatrixProject createMatrixProject(String name) throws IOException {
-        return (MatrixProject)hudson.createProject(MatrixProject.DESCRIPTOR,name);
+        return hudson.createProject(MatrixProject.class,name);
     }
 
     /**
@@ -382,7 +382,7 @@ public abstract class HudsonTestCase extends TestCase {
      * @see #configureDefaultMaven()
      */
     protected MavenModuleSet createMavenProject(String name) throws IOException {
-        return (MavenModuleSet)hudson.createProject(MavenModuleSet.DESCRIPTOR,name);
+        return hudson.createProject(MavenModuleSet.class,name);
     }
 
     private String createUniqueProjectName() {