From 3ac87296a6ea0002696f2b124cb8b9a706e4716a Mon Sep 17 00:00:00 2001
From: Tom Conkling <tim@threerings.net>
Date: Wed, 30 Jul 2008 01:16:42 +0000
Subject: [PATCH] StatModifier is Streamable, so that we can send stat updates
 from the game server to the world server

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@689 c613c5cb-e716-0410-b11b-feb51c14d237
---
 .../stats/data/IntSetStatAdder.java           |  5 +++
 .../stats/data/IntStatIncrementer.java        |  5 +++
 .../threerings/stats/data/StatModifier.java   | 31 ++++++++++++++++++-
 3 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/java/com/threerings/stats/data/IntSetStatAdder.java b/src/java/com/threerings/stats/data/IntSetStatAdder.java
index dac25d8f..3162d747 100644
--- a/src/java/com/threerings/stats/data/IntSetStatAdder.java
+++ b/src/java/com/threerings/stats/data/IntSetStatAdder.java
@@ -32,6 +32,11 @@ public class IntSetStatAdder extends StatModifier<IntSetStat>
         _value = value;
     }
 
+    /** Constructs an empty IntSetStatAdder (for Streaming purposes). */
+    public IntSetStatAdder ()
+    {
+    }
+
     @Override // from StatModifier
     public void modify (IntSetStat stat)
     {
diff --git a/src/java/com/threerings/stats/data/IntStatIncrementer.java b/src/java/com/threerings/stats/data/IntStatIncrementer.java
index bc296fd0..47c9e0c3 100644
--- a/src/java/com/threerings/stats/data/IntStatIncrementer.java
+++ b/src/java/com/threerings/stats/data/IntStatIncrementer.java
@@ -32,6 +32,11 @@ public class IntStatIncrementer extends StatModifier<IntStat>
         _delta = delta;
     }
 
+    /** Constructs an empty IntStatIncrementer (for Streaming purposes). */
+    public IntStatIncrementer ()
+    {
+    }
+
     @Override // from StatModifier
     public void modify (IntStat stat)
     {
diff --git a/src/java/com/threerings/stats/data/StatModifier.java b/src/java/com/threerings/stats/data/StatModifier.java
index 4622336a..c4d484ec 100644
--- a/src/java/com/threerings/stats/data/StatModifier.java
+++ b/src/java/com/threerings/stats/data/StatModifier.java
@@ -21,13 +21,20 @@
 
 package com.threerings.stats.data;
 
+import java.io.IOException;
 import java.io.Serializable;
 
+import com.threerings.io.NotStreamable;
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.ObjectOutputStream;
+import com.threerings.io.Streamable;
+
 /**
  * Encapsulates a modification to a single stat that can be serialized and sent to a different
  * server, if needed, to update stats loaded at runtime.
  */
-public abstract class StatModifier<T extends Stat> implements Serializable
+public abstract class StatModifier<T extends Stat>
+    implements Serializable, Streamable
 {
     /**
      * Creates a modifier that will operate on the supplied stat type. Note that this type may be
@@ -38,6 +45,11 @@ public abstract class StatModifier<T extends Stat> implements Serializable
         _type = type;
     }
 
+    /** Constructs an empty StatModifier (for Streaming purposes). */
+    protected StatModifier ()
+    {
+    }
+
     /**
      * Returns the {@link Stat.Type} of the stat being modified.
      */
@@ -46,11 +58,28 @@ public abstract class StatModifier<T extends Stat> implements Serializable
         return _type;
     }
 
+    /** Writes our custom streamable fields. */
+    public void writeObject (ObjectOutputStream out)
+        throws IOException
+    {
+        out.writeInt(_type.code());
+        out.defaultWriteObject();
+    }
+
+    /** Reads our custom streamable fields. */
+    public void readObject (ObjectInputStream in)
+        throws IOException, ClassNotFoundException
+    {
+        _type = Stat.getType(in.readInt());
+        in.defaultReadObject();
+    }
+
     /**
      * Applies the modification to the stat in question.
      */
     public abstract void modify (T stat);
 
     /** The type of the stat on which we're operating. */
+    @NotStreamable
     protected Stat.Type _type;
 }