author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 27 May 2010 12:43:29 +0300 | |
changeset 29 | 699651f2666f |
parent 21 | fa6d9f75d6a6 |
child 45 | 24fd82631616 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "cxestatemachinebase.h" |
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#include "cxutils.h" |
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#include "cxeerrormappingsymbian.h" |
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#include "cxestate.h" |
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CxeStateMachineBase::CxeStateMachineBase( const char* stateMachineName ) : |
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mStateBitsUsed(0), mStateId(0), mName(stateMachineName) |
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{ |
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} |
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CxeStateMachineBase::~CxeStateMachineBase() |
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{ |
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qDeleteAll(mStates); |
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mStates.clear(); |
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} |
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bool CxeStateMachineBase::addState( CxeState* state ) |
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{ |
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bool success( state // non-null state object |
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&& state->stateId() // state id is not zero |
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&& !(mStateBitsUsed & state->stateId()) // no overlapping bits |
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); |
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// if no errors |
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if (success) { |
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mStateBitsUsed |= state->stateId(); |
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mStates[state->stateId()] = state; // state is now owned by the state machine |
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} |
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return success; |
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} |
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bool CxeStateMachineBase::setState( int stateId, int error ) |
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{ |
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bool success = true; |
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if (stateId == mStateId) { |
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// No transition, nothing needs to be done |
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return success; |
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} |
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if (mStates.contains(stateId)) { |
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// New state name known, print it |
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CX_DEBUG(("%s::setState(%s, %d)", mName.toAscii().constData(), |
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mStates[stateId]->name().toAscii().constData(), error)); |
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} else { |
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// Unknown state... |
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CX_DEBUG(("%s::setState(UNKNOWN[%d], %d)", mName.toAscii().constData(), |
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stateId, error)); |
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} |
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// State state machine does not use the error parameter itself. |
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// It is only forwarded to handleStateChanged to be passed |
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// on as a parameter in the stateChanged() signal. |
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// setStateId itself will never return an error. |
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// If an illegal state or state change is detected, it will panic the application (because it is a design error). |
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success = verifyStateChange(stateId); |
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if (success) { |
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mStateId = stateId; |
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handleStateChanged(mStateId, CxeErrorHandlingSymbian::map(error)); |
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} |
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return success; |
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} |
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bool CxeStateMachineBase::setInitialState( int stateId ) |
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{ |
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bool success = mStates.contains(stateId); |
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|
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if (success) { |
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// New state name known, print it |
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CX_DEBUG(("%s::setInitialState(%s)", mName.toAscii().constData(), |
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mStates[stateId]->name().toAscii().constData())); |
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} else { |
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// Unknown state... |
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CX_DEBUG(("%s::setInitialState(UNKNOWN[%d])", mName.toAscii().constData(), |
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stateId)); |
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} |
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// check that state changes have not been made |
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// and this is the one and only setInitialState call |
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success = (success && mStateId == 0); |
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if (success) { |
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mStateId = stateId; |
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} else { |
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CX_DEBUG(("%s state has already been set", mName.toAscii().constData())); |
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} |
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return success; |
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} |
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|
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int CxeStateMachineBase::stateId() const |
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{ |
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return mStateId; |
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} |
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bool CxeStateMachineBase::verifyStateChange( int newStateId ) |
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{ |
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bool allowStateChange = false; |
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|
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// Check that current state can be found in the state chart |
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if ( mStates.contains(stateId()) ) { |
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// Check that current state allows change to the new state |
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CxeState *currentState = mStates[stateId()]; |
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allowStateChange = (currentState->allowedNextStates() & newStateId); |
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} |
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return allowStateChange; |
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} |
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