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diff --git a/examples_java/src/collections/ship/factory/PartKey.java b/examples_java/src/collections/ship/factory/PartKey.java
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+++ b/examples_java/src/collections/ship/factory/PartKey.java
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+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 2002-2009 Oracle.  All rights reserved.
+ *
+ * $Id$
+ */
+
+package collections.ship.factory;
+
+import com.sleepycat.bind.tuple.MarshalledTupleEntry;
+import com.sleepycat.bind.tuple.TupleInput;
+import com.sleepycat.bind.tuple.TupleOutput;
+
+/**
+ * A PartKey serves as the key in the key/data pair for a part entity.
+ *
+ * <p> In this sample, PartKey is bound to the stored key tuple entry by
+ * implementing the MarshalledTupleEntry interface, which is called by {@link
+ * SampleViews.MarshalledKeyBinding}. </p>
+ *
+ * @author Mark Hayes
+ */
+public class PartKey implements MarshalledTupleEntry {
+
+    private String number;
+
+    public PartKey(String number) {
+
+        this.number = number;
+    }
+
+    public final String getNumber() {
+
+        return number;
+    }
+
+    public String toString() {
+
+        return "[PartKey: number=" + number + ']';
+    }
+
+    // --- MarshalledTupleEntry implementation ---
+
+    public PartKey() {
+
+        // A no-argument constructor is necessary only to allow the binding to
+        // instantiate objects of this class.
+    }
+
+    public void marshalEntry(TupleOutput keyOutput) {
+
+        keyOutput.writeString(this.number);
+    }
+
+    public void unmarshalEntry(TupleInput keyInput) {
+
+        this.number = keyInput.readString();
+    }
+}