Added TaskContext.createSubContext( String name ) so that it is no longer necessary at all to know the underlying implementation - even when creating container tasks.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269643 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/myrmidon/api/DefaultTaskContext.java

@@ -173,6 +173,26 @@ public class DefaultTaskContext
         }
     }
 
+    /**
+     * Create a Child Context.
+     * This allows separate hierarchly contexts to be easily constructed.
+     *
+     * @param name the name of sub-context
+     * @return the created TaskContext
+     * @exception TaskException if an error occurs
+     */
+    public TaskContext createSubContext( final String name )
+        throws TaskException
+    {
+        final DefaultTaskContext context = new DefaultTaskContext( this );
+
+        context.setProperty( TaskContext.NAME, getName() + "." + name );
+        context.setProperty( TaskContext.BASE_DIRECTORY, getBaseDirectory() );
+        context.setProperty( TaskContext.JAVA_VERSION, getJavaVersion() );
+
+        return context;
+    }
+
     /**
      * Make sure property is valid if it is one of the "magic" properties.
      *

proposal/myrmidon/src/java/org/apache/myrmidon/api/TaskContext.java

@@ -103,8 +103,8 @@ public interface TaskContext
      * @return the created TaskContext
      * @exception TaskException if an error occurs
      */
-    //TaskContext createSubContext( String name )
-    //throws TaskException;
+    TaskContext createSubContext( String name )
+        throws TaskException;
 
     /**
      * Safe wrapper class for Scope enums.