Rewrote the InvocationReceiver generation process in Java as an Ant task. I had

previously redone the InvocationService and DObject generation tools but not
the InvocationReceiver tool.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3913 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/tools/decoder.tmpl

@@ -0,0 +1,52 @@
+package $package;
+
+#foreach ($import in $imports)
+import $import;
+#end
+
+/**
+ * Dispatches calls to a {@link ${name}Receiver} instance.
+ */
+public class ${name}Decoder extends InvocationDecoder
+{
+    /** The generated hash code used to identify this receiver class. */
+    public static final String RECEIVER_CODE = "$receiver_code";
+
+#foreach ($m in $methods)
+    /** The method id used to dispatch {@link ${name}Receiver#$m.method.name}
+     * notifications. */
+    public static final int $m.code = $velocityCount;
+
+#end
+    /**
+     * Creates a decoder that may be registered to dispatch invocation
+     * service notifications to the specified receiver.
+     */
+    public ${name}Decoder (${name}Receiver receiver)
+    {
+        this.receiver = receiver;
+    }
+
+    // documentation inherited
+    public String getReceiverCode ()
+    {
+        return RECEIVER_CODE;
+    }
+
+    // documentation inherited
+    public void dispatchNotification (int methodId, Object[] args)
+    {
+        switch (methodId) {
+#foreach ($m in $methods)
+        case $m.code:
+            ((${name}Receiver)receiver).${m.method.name}(
+                $m.getUnwrappedArgList(true)
+            );
+            return;
+
+#end
+        default:
+            super.dispatchNotification(methodId, args);
+        }
+    }
+}