prepared OT framework for use by RaceLog

java/com.sap.sailing.operationaltransformation/src/com/sap/sailing/operationaltransformation/OperationWithTransformationSupport.java

@@ -0,0 +1,23 @@
+package com.sap.sailing.operationaltransformation;
+
+
+
+public interface OperationWithTransformationSupport<S, O extends OperationWithTransformationSupport<S, O>> extends Operation<S> {
+    /**
+     * Implements the specific transformation rule for the implementing subclass for the set of possible peer operations
+     * along which to transform this operation, assuming this is the client operation. See
+     * {@link Transformer#transform(Operation, Operation)} for the specification.
+     * 
+     * @return the result of transforming <code>this</code> operation along <code>serverOp</code>
+     */
+    O transformClientOp(O serverOp);
+
+    /**
+     * Implements the specific transformation rule for the implementing subclass for the set of possible peer operations
+     * along which to transform this operation, assuming this is the server operation. See
+     * {@link Transformer#transform(Operation, Operation)} for the specification.
+     * 
+     * @return the result of transforming <code>this</code> operation along <code>clientOp</code>
+     */
+    O transformServerOp(O clientOp);
+}

java/com.sap.sailing.operationaltransformation/src/com/sap/sailing/operationaltransformation/OperationalTransformer.java

@@ -0,0 +1,13 @@
+package com.sap.sailing.operationaltransformation;
+
+
+public class OperationalTransformer<S, O extends OperationWithTransformationSupport<S, O>> implements Transformer<O> {
+
+    @Override
+    public ClientServerOperationPair<O> transform(O clientOp, O serverOp) {
+        ClientServerOperationPair<O> result = new ClientServerOperationPair<O>(
+                clientOp.transformClientOp(serverOp), serverOp.transformServerOp(clientOp));
+        return result;
+    }
+
+}

java/com.sap.sailing.operationaltransformation/src/com/sap/sailing/operationaltransformation/package.html

@@ -55,4 +55,9 @@ obtain the current state of a peer using the {@link com.sap.runlet.operationaltr
 operation.
 </p>
 
+Consider using {@link com.sap.sailing.operationaltransformation.OperationalTransformer} as the basis for your transformation
+logic. It generically works with {@link com.sap.sailing.operationaltransformation.OperationWithTransformationSupport} if you
+can afford to have your operation classes implement the transformation logic. The benefit of doing so is that adding more
+operations requires you to consider the transformation logic.
+
 </body>