/*

* Copyright (c) 2002-2008 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:  Class that defines logical AND operation in an XML tree.

*

*/

// INCLUDES

#include "cfandoperation.h"

#include "cfbasicoptrace.h"

#include <gmxmlnode.h>

// CONSTANTS

_LIT( KScriptAndName, "and" );

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CCFAndOperation::CCFAndOperation

// C++ default constructor can NOT contain any code, that might leave.

// -----------------------------------------------------------------------------

//

CCFAndOperation::CCFAndOperation( MCFOperationServices& aServices,

    CCFOperationNode* aParent )

    :   CCFOperationNode( aServices, aParent )

    {

    FUNC_LOG;

    }

// -----------------------------------------------------------------------------

// CCFAndOperation::ConstructL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CCFAndOperation::ConstructL()

    {

    FUNC_LOG;

    }

// -----------------------------------------------------------------------------

// CCFAndOperation::NewL

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

CCFAndOperation* CCFAndOperation::NewL( MCFOperationServices& aServices,

    CCFOperationNode* aParent )

    {

    FUNC_LOG;

    CCFAndOperation* self = NewLC( aServices, aParent );

    CleanupStack::Pop( self );

    return self;

    }

// -----------------------------------------------------------------------------

// CCFAndOperation::NewLC

// Two-phased constructor that leaves object to the cleanup stack.

// -----------------------------------------------------------------------------

//

CCFAndOperation* CCFAndOperation::NewLC( MCFOperationServices& aServices,

    CCFOperationNode* aParent )

    {

    FUNC_LOG;

    CCFAndOperation* self = new( ELeave ) CCFAndOperation( aServices, aParent );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

// -----------------------------------------------------------------------------

// CCFAndOperation::ParseL

// Construction with parsing from a DOM node.

// -----------------------------------------------------------------------------

//

CCFAndOperation* CCFAndOperation::ParseL( MCFOperationServices& aServices,

    CCFOperationNode* aParent,

    CMDXMLNode& aNode )

    {

    FUNC_LOG;

    if ( aNode.NodeName().CompareF( KScriptAndName ) != 0 )

        {

        return NULL; // Cannot create and operation from the given node.

        }

    CCFAndOperation* self = NewLC( aServices, aParent );    // CLEANUP<< self

    TBool unsupportedNode( EFalse );

    CMDXMLNode* child = aNode.FirstChild();

    while ( child )

        {

        if ( child->NodeType() == CMDXMLNode::EElementNode )

            {

            CCFOperationNode* op = self->iServices.ParseL( self, *child );

            if ( op )

                {

                self->iChildren.AppendL( op );

                }

            else

                {

                unsupportedNode = ETrue;

                break;

                }

            }

        else if ( child->NodeType() != CMDXMLNode::ECommentNode )

            {

            unsupportedNode = ETrue;

            break;

            }

        child = child->NextSibling();

        }

    CleanupStack::Pop( self );                              // CLEANUP<< self

    if ( unsupportedNode || !self->iChildren.Count() )

        {

        delete self; // Discard unsupported and operation.

        self = NULL;

        if ( unsupportedNode )

            {

            TPtrC nodeName( child->NodeName() );

            INFO_1( "CCFAndOperation::ParseL - Unsupported node [%S]",

                    &nodeName );

            }

        else

            {

            INFO( "CCFAndOperation::ParseL - No children" );

            }

        }

    CREATE_DOM_INFO( self, aNode );

    return self;

    }

// Destructor

CCFAndOperation::~CCFAndOperation()

    {

    FUNC_LOG;

    iChildren.ResetAndDestroy();

    }

// ---------------------------------------------------------------------------

// CCFAndOperation::ActivateL

// ---------------------------------------------------------------------------

//

void CCFAndOperation::ActivateL()

    {

    FUNC_LOG;

    for ( TInt i = 0; i < iChildren.Count(); ++i )

        {

        iChildren[ i ]->ActivateL();

        }

    }

// ---------------------------------------------------------------------------

// CCFAndOperation::Deactivate

// ---------------------------------------------------------------------------

//

void CCFAndOperation::Deactivate()

    {

    FUNC_LOG;

    for ( TInt i = 0; i < iChildren.Count(); ++i )

        {

        iChildren[ i ]->Deactivate();

        }

    }

// ---------------------------------------------------------------------------

// CCFAndOperation::CheckSecurity

// ---------------------------------------------------------------------------

//

TInt CCFAndOperation::CheckSecurity()

    {

    FUNC_LOG;

    for ( TInt i = 0; i < iChildren.Count(); ++i )

        {

        TInt err = iChildren[ i ]->CheckSecurity();

        if ( err != KErrNone )

            {

            return err;

            }

        }

    return KErrNone;

    }

// -----------------------------------------------------------------------------

// CCFAndOperation::Evaluate

// -----------------------------------------------------------------------------

//

void CCFAndOperation::Evaluate()

    {

    FUNC_LOG;

    DOM_INFO( "CCFAndOperation::Evaluate" );

    // get the value of the condition

    TCFConditionValue newValue = Value();

    TBool branchUndefined = EFalse;

    // iterate through all the children

    for ( TInt i = 0; i < iChildren.Count(); ++i )

        {

        // get the child's value

        newValue = iChildren[ i ]->Value();

        if ( !newValue )

            {

            break;

            }

        else if ( newValue == ECFConditionUndefined )

            {

            branchUndefined = ETrue;

            }

        }

    if ( branchUndefined && newValue == ECFConditionTrue )

        {

        newValue = ECFConditionUndefined;

        }

    if ( newValue != Value() )

        {

        INFO_1( "CCFAndOperation::Evaluate - Value changed to (-1=undefined, 0=false, 1=true): %d", newValue );

        iValue = newValue;

        if ( iParent )

            {

            // Recursion here; hopefully tree not deep

            iParent->Evaluate();

            }

        }

    else

        {

        INFO_1( "CCFAndOperation::Evaluate - Value still (-1=undefined, 0=false, 1=true): %d", newValue );

        }

    }

// -----------------------------------------------------------------------------

// CCFAndOperation::Cleanup

// -----------------------------------------------------------------------------

//

void CCFAndOperation::Cleanup()

    {

    FUNC_LOG;

    for ( TInt i = 0; i < iChildren.Count(); ++i )

        {

        iChildren[ i ]->Cleanup();

        }

    }