Fix problem with Serialization and Cursors hidden from original tests.

Reported by Rodney


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@131170 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/collections/CursorableLinkedList.java

@@ -1,5 +1,5 @@
 /*
- * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/CursorableLinkedList.java,v 1.16 2003/08/31 17:26:43 scolebourne Exp $
+ * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/CursorableLinkedList.java,v 1.17 2003/09/20 14:03:57 scolebourne Exp $
  * ====================================================================
  *
  * The Apache Software License, Version 1.1
@@ -84,7 +84,7 @@ import java.util.NoSuchElementException;
  *
  * @see java.util.LinkedList
  * @since Commons Collections 1.0
- * @version $Revision: 1.16 $ $Date: 2003/08/31 17:26:43 $
+ * @version $Revision: 1.17 $ $Date: 2003/09/20 14:03:57 $
  * 
  * @author Rodney Waldhoff
  * @author Janek Bogucki
@@ -92,6 +92,9 @@ import java.util.NoSuchElementException;
 public class CursorableLinkedList implements List, Serializable {
     //  TODO: use weak references to cursors in case they aren't closed directly
     
+    /** Ensure serialization compatability */    
+    private static final long serialVersionUID = 8836393098519411393L;
+
     //--- public methods ---------------------------------------------
 
     /**
@@ -897,7 +900,7 @@ public class CursorableLinkedList implements List, Serializable {
         out.defaultWriteObject();
         out.writeInt(_size);
         Listable cur = _head.next();
-        while(cur != null) {
+        while (cur != null) {
             out.writeObject(cur.value());
             cur = cur.next();
         }
@@ -906,9 +909,11 @@ public class CursorableLinkedList implements List, Serializable {
     private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
         in.defaultReadObject();
         _size = 0;
+        _modCount = 0;
+        _cursors = new ArrayList();
         _head = new Listable(null,null,null);
         int size = in.readInt();
-        for(int i=0;i<size;i++) {
+        for (int i=0;i<size;i++) {
             this.add(in.readObject());
         }
     }
@@ -916,7 +921,7 @@ public class CursorableLinkedList implements List, Serializable {
     //--- protected attributes ---------------------------------------
 
     /** The number of elements in me. */
-    transient protected int _size = 0;
+    protected transient int _size = 0;
 
     /**
      * A sentry node.
@@ -930,16 +935,16 @@ public class CursorableLinkedList implements List, Serializable {
      * {@link org.apache.commons.collections.CursorableLinkedList.Listable} 
      * is the first or last element in the list.
      */
-    transient protected Listable _head = new Listable(null,null,null);
+    protected transient Listable _head = new Listable(null,null,null);
 
     /** Tracks the number of structural modifications to me. */
-    protected int _modCount = 0;
+    protected transient int _modCount = 0;
 
     /**
      * A list of the currently {@link CursorableLinkedList.Cursor}s currently
      * open in this list.
      */
-    protected List _cursors = new ArrayList();
+    protected transient List _cursors = new ArrayList();
 
     //--- inner classes ----------------------------------------------
 

src/test/org/apache/commons/collections/TestCursorableLinkedList.java

@@ -1,7 +1,7 @@
 /*
- * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/TestCursorableLinkedList.java,v 1.9 2003/08/31 17:28:43 scolebourne Exp $
+ * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/test/org/apache/commons/collections/TestCursorableLinkedList.java,v 1.10 2003/09/20 14:03:57 scolebourne Exp $
- * $Revision: 1.9 $
+ * $Revision: 1.10 $
- * $Date: 2003/08/31 17:28:43 $
+ * $Date: 2003/09/20 14:03:57 $
  *
  * ====================================================================
  *
@@ -71,7 +71,7 @@ import junit.framework.Test;
 
 /**
  * @author Rodney Waldhoff
- * @version $Id: TestCursorableLinkedList.java,v 1.9 2003/08/31 17:28:43 scolebourne Exp $
+ * @version $Id: TestCursorableLinkedList.java,v 1.10 2003/09/20 14:03:57 scolebourne Exp $
  */
 public class TestCursorableLinkedList extends TestList {
     public TestCursorableLinkedList(String testName) {
@@ -932,6 +932,29 @@ public class TestCursorableLinkedList extends TestList {
         assertTrue(list.equals(list2));
     }
 
+    public void testSerializationWithOpenCursor() throws Exception {
+        list.add("A");
+        list.add("B");
+        list.add("C");
+        list.add("D");
+        list.add("E");
+        CursorableLinkedList.Cursor cursor = list.cursor();
+
+        java.io.ByteArrayOutputStream buf = new java.io.ByteArrayOutputStream();
+        java.io.ObjectOutputStream out = new java.io.ObjectOutputStream(buf);
+        out.writeObject(list);
+        out.flush();
+        out.close();
+
+        java.io.ByteArrayInputStream bufin = new java.io.ByteArrayInputStream(buf.toByteArray());
+        java.io.ObjectInputStream in = new java.io.ObjectInputStream(bufin);
+        Object list2 = in.readObject();
+
+        assertTrue(list != list2);
+        assertTrue(list2.equals(list));
+        assertTrue(list.equals(list2));
+    }
+
     public void testLongSerialization() throws Exception {
         // recursive serialization will cause a stack
         // overflow exception with long lists