--- old/src/share/classes/javax/sql/rowset/serial/SerialBlob.java	2012-06-25 15:45:03.952364123 +0800
+++ new/src/share/classes/javax/sql/rowset/serial/SerialBlob.java	2012-06-25 15:45:03.772363227 +0800
@@ -81,6 +81,8 @@
      */
     private long origLen;
 
+    private transient boolean isFree = false;
+
     /**
      * Constructs a <code>SerialBlob</code> object that is a serialized version of
      * the given <code>byte</code> array.
@@ -162,6 +164,12 @@
      * @throws SerialException if the given starting position is out of bounds
      */
     public byte[] getBytes(long pos, int length) throws SerialException {
+        if (isFree == true) {
+            throw new SerialException(
+                    "Unsupported operation. SerialBlob cannot "
+                            + "get bytes when it has already been freed with free()");
+         }
+
         if (length > len) {
             length = (int)len;
         }
@@ -206,6 +214,12 @@
      * @see #setBinaryStream
      */
     public java.io.InputStream getBinaryStream() throws SerialException {
+         if (isFree == true) {
+            throw new SerialException(
+                    "Unsupported operation. SerialBlob cannot "
+                            + "return a binary stream when it has already been freed with free()");
+         }
+
          InputStream stream = new ByteArrayInputStream(buf);
          return stream;
     }
@@ -232,6 +246,11 @@
      */
     public long position(byte[] pattern, long start)
                 throws SerialException, SQLException {
+        if (isFree == true) {
+            throw new SerialException(
+                    "Unsupported operation. SerialBlob has already been freed ");
+        }
+
         if (start < 1 || start > len) {
             return -1;
         }
@@ -334,6 +353,11 @@
      */
     public int setBytes(long pos, byte[] bytes, int offset, int length)
         throws SerialException, SQLException {
+        if (isFree == true) {
+            throw new SerialException(
+                    "Unsupported operation. SerialBlob cannot "
+                            + "set a binary stream when it has already been freed with free()");
+         }
 
         if (offset < 0 || offset > bytes.length) {
             throw new SerialException("Invalid offset in byte array set");
@@ -402,6 +426,11 @@
      *     or the length to truncate is greater that the SerialBlob length
      */
     public void truncate(long length) throws SerialException {
+        if (isFree == true) {
+            throw new SerialException(
+                    "Unsupported operation. SerialBlob cannot "
+                            + "truncate a SerialBlob when it has already been freed with free()");
+         }
 
          if (length > len) {
             throw new SerialException
@@ -431,7 +460,19 @@
      * @since 1.6
      */
     public InputStream getBinaryStream(long pos,long length) throws SQLException {
-        throw new java.lang.UnsupportedOperationException("Not supported");
+        if (isFree == true) {
+            throw new SerialException(
+                    "Unsupported operation. SerialBlob cannot "
+                            + "return a binary stream when it has already been freed with free()");
+         }
+
+        if (pos < 1 || pos > len || length > len - pos + 1) {
+            throw new SerialException("Invalid pos in getBinaryStream");
+        }
+        if (length > len - pos + 1) {
+            throw new SerialException("pos + length greater than total number of bytes");
+        }
+        return new ByteArrayInputStream(buf, (int) pos - 1, (int) length);
     }
 
 
@@ -446,7 +487,14 @@
      * @since 1.6
      */
     public void free() throws SQLException {
-        throw new java.lang.UnsupportedOperationException("Not supported");
+        if (isFree == false) {
+            len = -1;
+            origLen = -1;
+            buf = null;
+            blob = null;
+
+            isFree = true;
+        }
     }
     /**
          * The identifier that assists in the serialization of this <code>SerialBlob</code>