java_gen: work in progress commit of java generator
diff --git a/java_gen/templates/message_interface.java b/java_gen/templates/message_interface.java
new file mode 100644
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+++ b/java_gen/templates/message_interface.java
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+//:: # Copyright 2013, Big Switch Networks, Inc.
+//:: #
+//:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
+//:: # the following special exception:
+//:: #
+//:: # LOXI Exception
+//:: #
+//:: # As a special exception to the terms of the EPL, you may distribute libraries
+//:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
+//:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
+//:: # from the LoxiGen Libraries and the notice provided below is (i) included in
+//:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
+//:: # documentation for the LoxiGen Libraries, if distributed in binary form.
+//:: #
+//:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
+//:: #
+//:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
+//:: # a copy of the EPL at:
+//:: #
+//:: # http::: #www.eclipse.org/legal/epl-v10.html
+//:: #
+//:: # Unless required by applicable law or agreed to in writing, software
+//:: # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//:: # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+//:: # EPL for the specific language governing permissions and limitations
+//:: # under the EPL.
+//::
+//:: import itertools
+//:: import of_g
+//:: include('_copyright.java')
+
+//:: include('_autogen.java')
+
+package org.openflow.protocol;
+import java.util.List;
+import org.openflow.protocol.match.*;
+import org.openflow.protocol.actions.OFAction;
+import org.openflow.protocol.instructions.OFInstruction;
+import org.openflow.types.*;
+import org.openflow.util.*;
+import org.openflow.exceptions.OFUnsupported;
+
+public interface ${msg.interface_name} extends OFMessage {
+    int getXid();
+    boolean isXidSet();
+    OFType getType();
+    OFVersion getVersion();
+
+//:: for prop in msg.all_properties():
+    ${prop.java_type.public_type} get${prop.title_name}()${ "" if prop.is_universal else "throws UnsupportedOperationException"};
+//:: #endfor
+
+    Builder createBuilder();
+
+    public interface Builder {
+        ${msg.interface_name} getMessage();
+//:: for prop in msg.all_properties():
+        ${prop.java_type.public_type} get${prop.title_name}()${ "" if prop.is_universal else "throws UnsupportedOperationException"};
+        Builder set${prop.title_name}(${prop.java_type.public_type} ${prop.name})${ "" if prop.is_universal else " throws UnsupportedOperationException"};
+//:: #endfor
+
+    }
+}