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diff --git a/package/qa/storages/RegressionTest_i55821.java b/package/qa/storages/RegressionTest_i55821.java
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+++ b/package/qa/storages/RegressionTest_i55821.java
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+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+package complex.storages;
+
+import com.sun.star.uno.XInterface;
+import com.sun.star.lang.XMultiServiceFactory;
+import com.sun.star.lang.XSingleServiceFactory;
+
+import com.sun.star.bridge.XUnoUrlResolver;
+import com.sun.star.uno.UnoRuntime;
+import com.sun.star.uno.XInterface;
+import com.sun.star.io.XStream;
+
+import com.sun.star.embed.*;
+
+import share.LogWriter;
+import complex.storages.TestHelper;
+import complex.storages.StorageTest;
+
+public class RegressionTest_i55821 implements StorageTest {
+
+    XMultiServiceFactory m_xMSF;
+    XSingleServiceFactory m_xStorageFactory;
+    TestHelper m_aTestHelper;
+
+    public RegressionTest_i55821( XMultiServiceFactory xMSF, XSingleServiceFactory xStorageFactory, LogWriter aLogWriter )
+    {
+        m_xMSF = xMSF;
+        m_xStorageFactory = xStorageFactory;
+        m_aTestHelper = new TestHelper( aLogWriter, "RegressionTest_i55821: " );
+    }
+
+    public boolean test()
+    {
+        try
+        {
+
+            // create a temporary stream and a storage based on it
+            // fill the storage with the data that will be used for testing
+
+
+            XStream xTempFileStream = m_aTestHelper.CreateTempFileStream( m_xMSF );
+            if ( xTempFileStream == null )
+                return false;
+
+            // create storage based on the temporary stream
+            Object pArgs[] = new Object[2];
+            pArgs[0] = (Object) xTempFileStream;
+            pArgs[1] = Integer.valueOf( ElementModes.WRITE );
+
+            Object oTempStorage = m_xStorageFactory.createInstanceWithArguments( pArgs );
+            XStorage xTempStorage = (XStorage) UnoRuntime.queryInterface( XStorage.class, oTempStorage );
+            if ( xTempStorage == null )
+            {
+                m_aTestHelper.Error( "Can't create temporary storage representation!" );
+                return false;
+            }
+
+            String sPass = "12345";
+            byte pBytes[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
+
+            // open a new substream, set "MediaType" and "Compressed" properties to it and write some bytes
+            // the stream will not be encrypted
+            if ( !m_aTestHelper.WriteBytesToEncrSubstream( xTempStorage, "SubStream1", "MediaType1", false, pBytes, sPass ) )
+                return false;
+
+            if ( !m_aTestHelper.commitStorage( xTempStorage ) )
+                return false;
+
+            if ( !m_aTestHelper.WriteBytesToEncrSubstream( xTempStorage, "SubStream2", "MediaType2", false, pBytes, sPass ) )
+                return false;
+
+            if ( !m_aTestHelper.commitStorage( xTempStorage ) )
+                return false;
+
+            // dispose used storages to free resources
+            if ( !m_aTestHelper.disposeStorage( xTempStorage ) )
+                return false;
+
+
+            // reopen the target storage readonly, and check contents
+
+
+            // the temporary file must not be locked any more after storage disposing
+            pArgs[1] = Integer.valueOf( ElementModes.READ );
+            Object oResultStorage = m_xStorageFactory.createInstanceWithArguments( pArgs );
+            XStorage xResultStorage = (XStorage) UnoRuntime.queryInterface( XStorage.class, oResultStorage );
+            if ( xResultStorage == null )
+            {
+                m_aTestHelper.Error( "Can't reopen storage based on temporary file!" );
+                return false;
+            }
+
+            if ( !m_aTestHelper.checkEncrStream( xResultStorage, "SubStream1", "MediaType1", pBytes, sPass ) )
+                return false;
+
+            if ( !m_aTestHelper.checkEncrStream( xResultStorage, "SubStream2", "MediaType2", pBytes, sPass ) )
+                return false;
+
+            // dispose used storages to free resources
+            if ( !m_aTestHelper.disposeStorage( xResultStorage ) )
+                return false;
+
+            return true;
+        }
+        catch( Exception e )
+        {
+            m_aTestHelper.Error( "Exception: " + e );
+            return false;
+        }
+    }
+}
+