parameter-framework/parameter/ParameterHandle.cpp

/*
 * Copyright (c) 2011-2014, Intel Corporation
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
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 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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#include "ParameterHandle.h"
#include "ParameterAccessContext.h"
#include "BaseParameter.h"
#include "Subsystem.h"
#include <assert.h>
#include "ParameterMgr.h"
#include "AutoLock.h"

using std::string;

CParameterHandle::CParameterHandle(const CBaseParameter* pParameter, CParameterMgr* pParameterMgr)
    : _pBaseParameter(pParameter), _pParameterMgr(pParameterMgr), _bBigEndianSubsystem(pParameter->getBelongingSubsystem()->isBigEndian())
{
}

// Parameter features
bool CParameterHandle::isRogue() const
{
    return _pBaseParameter->isRogue();
}

bool CParameterHandle::isArray() const
{
    return !_pBaseParameter->isScalar();
}

// Array Length
uint32_t CParameterHandle::getArrayLength() const
{
    return _pBaseParameter->getArrayLength();
}

// Parameter path
string CParameterHandle::getPath() const
{
    return _pBaseParameter->getPath();
}

// Parameter kind
string CParameterHandle::getKind() const
{
    return _pBaseParameter->getKind();
}

// Boolean access
bool CParameterHandle::setAsBoolean(bool bValue, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsBoolean(bValue, true, parameterAccessContext);
}

bool CParameterHandle::getAsBoolean(bool& bValue, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsBoolean(bValue, false, parameterAccessContext);
}

bool CParameterHandle::setAsBooleanArray(const std::vector<bool>& abValues, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, abValues.size(), strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    // Copy values for type adaptation
    std::vector<bool> abUserValues = abValues;

    return _pBaseParameter->accessAsBooleanArray(abUserValues, true, parameterAccessContext);
}

bool CParameterHandle::getAsBooleanArray(std::vector<bool>& abValues, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, -1, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsBooleanArray(abValues, false, parameterAccessContext);
}

// Integer Access
bool CParameterHandle::setAsInteger(uint32_t uiValue, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsInteger(uiValue, true, parameterAccessContext);
}

bool CParameterHandle::getAsInteger(uint32_t& uiValue, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsInteger(uiValue, false, parameterAccessContext);
}

bool CParameterHandle::setAsIntegerArray(const std::vector<uint32_t>& auiValues, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, auiValues.size(), strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    // Copy values for type adaptation
    std::vector<uint32_t> auiUserValues = auiValues;

    return _pBaseParameter->accessAsIntegerArray(auiUserValues, true, parameterAccessContext);
}

bool CParameterHandle::getAsIntegerArray(std::vector<uint32_t>& auiValues, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, -1, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsIntegerArray(auiValues, false, parameterAccessContext);
}

// Signed Integer Access
bool CParameterHandle::setAsSignedInteger(int32_t iValue, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsSignedInteger(iValue, true, parameterAccessContext);
}

bool CParameterHandle::getAsSignedInteger(int32_t& iValue, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsSignedInteger(iValue, false, parameterAccessContext);
}

bool CParameterHandle::setAsSignedIntegerArray(const std::vector<int32_t>& aiValues, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, aiValues.size(), strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    // Copy values for type adaptation
    std::vector<int32_t> aiUserValues = aiValues;

    return _pBaseParameter->accessAsSignedIntegerArray(aiUserValues, true, parameterAccessContext);
}

bool CParameterHandle::getAsSignedIntegerArray(std::vector<int32_t>& aiValues, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, -1, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsSignedIntegerArray(aiValues, false, parameterAccessContext);
}

// Double Access
bool CParameterHandle::setAsDouble(double dValue, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsDouble(dValue, true, parameterAccessContext);
}

bool CParameterHandle::getAsDouble(double& dValue, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsDouble(dValue, false, parameterAccessContext);
}

bool CParameterHandle::setAsDoubleArray(const std::vector<double>& adValues, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, adValues.size(), strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    // Copy values for type adaptation
    std::vector<double> adUserValues = adValues;

    return _pBaseParameter->accessAsDoubleArray(adUserValues, true, parameterAccessContext);
}

bool CParameterHandle::getAsDoubleArray(std::vector<double>& adValues, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, -1, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsDoubleArray(adValues, false, parameterAccessContext);
}

// String Access
bool CParameterHandle::setAsString(const string& strValue, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    // Copy value for type adaptation
    string strUserValue = strValue;

    return _pBaseParameter->accessAsString(strUserValue, true, parameterAccessContext);
}

bool CParameterHandle::getAsString(string& strValue, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, 0, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsString(strValue, false, parameterAccessContext);
}

bool CParameterHandle::setAsStringArray(const std::vector<string>& astrValues, string& strError)
{
    // Check operation validity
    if (!checkAccessValidity(true, (uint32_t)astrValues.size(), strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // When in tuning mode, silently skip the request
    if (_pParameterMgr->tuningModeOn()) {

        return true;
    }

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    // Copy values for type adaptation
    std::vector<string> astrUserValues = astrValues;

    return _pBaseParameter->accessAsStringArray(astrUserValues, true, parameterAccessContext);
}

bool CParameterHandle::getAsStringArray(std::vector<string>& astrValues, string& strError) const
{
    // Check operation validity
    if (!checkAccessValidity(false, -1, strError)) {

        return false;
    }
    // Ensure we're safe against blackboard foreign access
    CAutoLock autoLock(_pParameterMgr->getBlackboardMutex());

    // Define access context
    CParameterAccessContext parameterAccessContext(strError, _bBigEndianSubsystem, _pParameterMgr->getParameterBlackboard());

    return _pBaseParameter->accessAsStringArray(astrValues, false, parameterAccessContext);
}

// Access validity
bool CParameterHandle::checkAccessValidity(bool bSet, size_t uiArrayLength, string& strError) const
{
    if (bSet && !isRogue()) {

        strError = "Parameter is not rogue: ";

        strError += getPath();

        return false;
    }

    if (uiArrayLength && !isArray()) {

        strError = "Parameter is scalar: ";

        strError += getPath();

        return false;
    }

    if (!uiArrayLength && isArray()) {

        strError = "Parameter is an array: ";

        strError += getPath();

        return false;
    }

    if (bSet && uiArrayLength && (uiArrayLength != getArrayLength())) {

        strError = "Array length mismatch: ";

        strError += getPath();

        return false;
    }

    return true;
}