Added support for streaming arrays of streamables; extracted the efficient

streamable serialization code from PolyStreamableList and made it
generally available; modified the StreamableArrayList to support
heterogenous lists (because they don't have much more overhead than
homogenous lists now) which allows us to remove PolyStreamableList
entirely.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1140 542714f4-19e9-0310-aa3c-eee0fc999fb1

tests/src/java/com/threerings/io/StreamableUtilTest.java

@@ -0,0 +1,128 @@
+//
+// $Id: StreamableUtilTest.java,v 1.1 2002/03/20 22:58:26 mdb Exp $
+
+package com.threerings.presents.io;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+
+import java.util.Arrays;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+
+import com.samskivert.util.StringUtil;
+
+/**
+ * Tests the {@link StreamableUtil} class.
+ */
+public class StreamableUtilTest extends TestCase
+{
+    public StreamableUtilTest ()
+    {
+        super(StreamableUtilTest.class.getName());
+    }
+
+    public static class Boink extends SimpleStreamableObject
+    {
+        public String foo;
+        public int bar;
+        public float baz;
+
+        public Boink ()
+        {
+        }
+
+        public Boink (String foo, int bar, float baz)
+        {
+            this.foo = foo;
+            this.bar = bar;
+            this.baz = baz;
+        }
+
+        public boolean equals (Object other)
+        {
+            Boink bo = (Boink)other;
+            return (bo.foo.equals(foo) &&
+                    bo.bar == bar &&
+                    bo.baz == baz);
+        }
+    }
+
+    public static class Blink extends Boink
+    {
+        public int bizz;
+
+        public Blink ()
+        {
+        }
+
+        public Blink (String foo, int bar, float baz, int bizz )
+        {
+            super(foo, bar, baz);
+            this.bizz = bizz;
+        }
+
+        public boolean equals (Object other)
+        {
+            Blink bo = (Blink)other;
+            return (bo.foo.equals(foo) &&
+                    bo.bar == bar &&
+                    bo.baz == baz &&
+                    bo.bizz == bizz);
+        }
+    }
+
+    public void runTest ()
+    {
+        int bcount = 15;
+        Boink[] boinks = new Boink[bcount];
+        for (int i = 0; i < bcount; i++) {
+            if (i % 2 == 0) {
+                boinks[i] = new Boink(Integer.toString(i), i,
+                                      (float)i + (float)0.5);
+            } else {
+                boinks[i] = new Blink(Integer.toString(i), i,
+                                      (float)i + (float)0.5, 100-i);
+            }
+        }
+        // System.out.println("boinks: " + StringUtil.toString(boinks));
+
+        try {
+            ByteArrayOutputStream bout = new ByteArrayOutputStream();
+            DataOutputStream dout = new DataOutputStream(bout);
+            StreamableUtil.writeStreamables(dout, boinks);
+            dout.flush();
+
+            byte[] data = bout.toByteArray();
+            // System.out.println(bcount + " boinks takes up " +
+            // data.length + " bytes.");
+
+            ByteArrayInputStream bin = new ByteArrayInputStream(data);
+            DataInputStream din = new DataInputStream(bin);
+            Boink[] nboinks = (Boink[])StreamableUtil.readStreamables(din);
+
+            // make sure all went well
+            assert("boinks == nboinks", Arrays.equals(boinks, nboinks));
+
+            // System.out.println("nboinks: " + StringUtil.toString(nboinks));
+
+        } catch (Exception e) {
+            e.printStackTrace(System.err);
+            fail("exception: " + e);
+        }
+    }
+
+    public static Test suite ()
+    {
+        return new StreamableUtilTest();
+    }
+
+    public static void main (String[] args)
+    {
+        StreamableUtilTest test = new StreamableUtilTest();
+        test.runTest();
+    }
+}