--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaextensions/sensor/src.s60/cpssensorbase.h	Mon May 03 12:27:20 2010 +0300
@@ -0,0 +1,167 @@
+/*
+* 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 Publish & Subscripe -type Sensors
+ *
+*/
+
+#ifndef CPSSENSORBASE_H
+#define CPSSENSORBASE_H
+
+#include <e32property.h> // Publish & Subscribe
+#include "csensorbase.h"
+
+// Forward declarations
+class CPSSensorBaseAsyncQuery;
+
+class CPSSensorBase : public CSensorBase
+{
+    // Asynchronous query helper class
+    class CPSSensorBaseAsyncQuery : public CActive
+    {
+    public:
+        static CPSSensorBaseAsyncQuery* NewL(CPSSensorBase& aSensorBase,
+                                             TUid aPropertyCategory, TInt aPropertyKey);
+        virtual ~CPSSensorBaseAsyncQuery();
+
+    protected:
+        void ConstructL(TUid aPropertyCategory, TInt aPropertyKey);
+        CPSSensorBaseAsyncQuery(CPSSensorBase& aSensorBase);
+
+    public:    // From CActive
+        void RunL();
+        void DoCancel();
+
+    public:    // New methods
+        void NotifyOnChange();
+
+    private: // Members
+        CPSSensorBase& iSensorBase;
+
+        /**
+         * Property handle used to query property changes
+         */
+        RProperty iProperty;
+    };
+
+    // Poll timer helper class
+    class CPSSensorDataListenTimer : public CTimer
+    {
+    public:
+        static CPSSensorDataListenTimer* NewL(CPSSensorBase& iSensorBase);
+        virtual ~CPSSensorDataListenTimer();
+
+    protected:
+        CPSSensorDataListenTimer(CPSSensorBase& iSensorBase);
+
+    public:    // from CTimer
+        void RunL();
+        void DoCancel();
+
+    public:    // Members
+        CPSSensorBase& iSensorBase;
+    };
+
+public:
+    // Destructor
+    virtual ~CPSSensorBase();
+
+protected:
+    // Second phase constructor
+    void ConstructL(TUid aPropertyCategory, TInt aPropertyKey);
+
+    // Constructor
+    CPSSensorBase(TTimeIntervalMicroSeconds32 aPollInterval);
+
+public:    // From Sensor
+
+    virtual int OpenChannel(SensorListener* aListener);
+
+
+public:    // From CSensorBase
+    virtual TReal InterpretValue(TReal aValue) = 0;
+    TBool EvaluateConditions(TInt aValue, TInt aChannelId);
+
+    void AddConditionL(void** aHandle, int aChannelId, double aLowerLimit,
+                       double aUpperLimit, int aLowerOp, int aUpperOp);
+
+    void StartDataListeningL();
+    void StartConditionListeningL();
+    void CancelDataListeningL();
+    void CloseChannelL();
+    void StopConditionListeningL();
+
+private: // New methods
+
+    /**
+     * Leaving version of OpenChannel
+     */
+    void OpenChannelL(SensorListener* aListener);
+    /**
+     * Reset data object and those member variables that are
+     * involved in data accumulation round.
+     */
+    void ResetAccumulationData();
+
+    /**
+     * Callback method called by RunL of the poll timer.
+     */
+    void AccumulateDataL();
+
+    /**
+     * Used by AccumulateDataL to send data to Java side and do
+     * necessary cleanup.
+     */
+    void SendData();
+
+    /**
+     * Called by RunL of iAsyncQuery when query is complete
+     */
+    void PropertyValueChanged();
+
+private: // Members
+
+    /**
+     * Property values
+     */
+    TUid iPropertyCategory;
+    TInt iPropertyKey;
+    /**
+     * Async query handler used to get property value change
+     * notifications
+     */
+    CPSSensorBaseAsyncQuery* iAsyncQuery;
+
+    /**
+     * Used to get property values periodically.
+     */
+    CTimer* iPollTimer;
+
+    /**
+     * Property handle used to get property value
+     */
+    RProperty iProperty;
+
+    /**
+     * Beat interval used in periodic polling
+     */
+    TTimeIntervalMicroSeconds32 iPollInterval;
+
+    /**
+     * Values used in asynchronous polling
+     */
+    TTime iStartTime;
+    TInt iBufferPosition;
+};
+
+#endif // CPSSENSORBASE_H