--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javacommons/gcfbase/inc/nativestreambase.h	Tue Apr 27 16:30:29 2010 +0300
@@ -0,0 +1,98 @@
+/*
+* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Base class for all native implementation of stream types
+*
+*/
+
+
+#ifndef NATIVESTREAMBASE_H
+#define NATIVESTREAMBASE_H
+
+#include <jni.h>
+
+namespace java
+{
+
+/**
+* This is the base class for Native Peer of streams.
+* StreamConnectionBase in will make calls to the native side to get/send data.
+* It will have stored a handle to the Object and uses it to call these methods.
+*
+* Usage:
+* Please ensure that this class comes first in the line of inheritance as shown.
+*
+* @code
+* class StreamConnectionX : public NativeStreamBase, public AllOtherClasses
+* @endcode
+*
+*/
+class NativeStreamBase
+{
+public:
+    /**
+    * ReadBytes is called once the buffer at the InputStream in Java runs
+    * out of data.
+    * How this function should be called.
+    * @param[in]  aJavaBuffer: A byte array of length 512 bytes
+    * @return return should be the number of bytes read. If error, then the
+    *         value of errno should be negated and returned. (return -errno)
+    */
+    virtual int readBytes(JNIEnv& aJni, jbyteArray aJavaBuffer) = 0;
+
+    /**
+    * WriteBytes is called once buffer at the OutputStream in Java overflows.
+    * It is also called if flush() is called at the Java side.
+    * How this function should be called.
+    * @param[in]  aJavaBuffer: A byte array of length aLength
+    * @return return should be the number of bytes written. If error, then the
+    *         value of errno should be negated and returned. (return -errno)
+    */
+    virtual int writeBytes(JNIEnv& aJni, jbyteArray aJavaBuffer,
+                           int aOffset, int aLength) = 0;
+
+    /**
+    * StopReading is called once InputStream is closed from the Application.
+    */
+    virtual void stopReading() = 0;
+
+    /**
+    * StopWriting is called once OutputStream is closed from the Application.
+    */
+    virtual void stopWriting() = 0;
+
+    /**
+    * Defines the size of the buffer to be held on the native side. Should be
+    * same as the buffer in the InputStream
+    */
+    int mBufferSize;
+
+    /**
+     * SetBufferSize is called during StreamConnectionBase construction.
+     * This is to keep both Java and Native Buffers in sync.
+     */
+    void setBufferSize(int aSize)
+    {
+        mBufferSize = aSize;
+    }
+
+    virtual int available()
+    {
+        return 0;
+    }
+};
+
+}  //end namespace java
+
+
+#endif // NATIVESTREAMBASE_H