1 /*

     2  * Name        : Loader.h

     3  * Description : 

     4  * Project     : This file is part of OpenMAR, an Open Mobile Augmented Reality browser

     5  * Website     : http://OpenMAR.org

     6  *

     7  * Copyright (c) 2010 David Caabeiro

     8  *

     9  * All rights reserved. This program and the accompanying materials are made available 

    10  * under the terms of the Eclipse Public License v1.0 which accompanies this 

    11  * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html

    12  *

    13  */

    14 

    15 #ifndef LOADER_H_

    16 #define LOADER_H_

    17 

    18 #include <e32base.h>

    19 #include <http/MHttpTransactionCallback.h>

    20 #include <xml/ContentHandler.h>

    21 #include <xml/Parser.h>

    22 

    23 #include <EPos_CPosLandmark.h>

    24 

    25 //class CPosLandmark;

    26 class TCoordinate;

    27 class CHttpClient;

    28 class CEntry;

    29 

    30 class MLandmarkLoaderObserver

    31 {

    32 public:

    33     virtual void LandmarkLoaderOpenedL(TInt aError) = 0;

    34     virtual void LandmarkLoaderItemCreatedL(const CPosLandmark& aLandmark) = 0;

    35 };

    36 

    37 class CLoader : public CBase, public MHTTPTransactionCallback, public Xml::MContentHandler

    38 {

    39 public:

    40     static CLoader* NewL(MLandmarkLoaderObserver& aObserver);

    41     ~CLoader();

    42 

    43 protected:

    44     CLoader(MLandmarkLoaderObserver& aObserver);

    45     void ConstructL();

    46 

    47 public:

    48     void RequestL(const TCoordinate& aPosition, TReal32 aRadius);

    49 

    50 protected:

    51     // From MHTTPTransactionCallback

    52     void MHFRunL(RHTTPTransaction aTransaction, const THTTPEvent& aEvent);

    53     TInt MHFRunError(TInt aError, RHTTPTransaction aTransaction, const THTTPEvent& aEvent);

    54 

    55 protected:

    56     // from MContentHandler

    57     void OnStartDocumentL(const Xml::RDocumentParameters& aDocParam, TInt aErrorCode);

    58     void OnEndDocumentL(TInt aErrorCode);

    59     void OnStartElementL(const Xml::RTagInfo& aElement, const Xml::RAttributeArray& aAttributes, TInt aErrorCode);

    60     void OnEndElementL(const Xml::RTagInfo& aElement, TInt aErrorCode);

    61     void OnContentL(const TDesC8& aBytes, TInt aErrorCode);

    62     void OnStartPrefixMappingL(const RString& aPrefix, const RString& aUri, TInt aErrorCode);

    63     void OnEndPrefixMappingL(const RString& aPrefix, TInt aErrorCode);

    64     void OnIgnorableWhiteSpaceL(const TDesC8& aBytes, TInt aErrorCode);

    65     void OnSkippedEntityL(const RString& aName, TInt aErrorCode);

    66     void OnProcessingInstructionL(const TDesC8& aTarget, const TDesC8& aData, TInt aErrorCode);

    67     void OnError(TInt aErrorCode);

    68     TAny* GetExtendedInterface(const TInt32 aUid);

    69 

    70     void NotifyPOIEntryL();

    71 

    72 private:

    73     MLandmarkLoaderObserver& iObserver;

    74 

    75     CHttpClient* iClient;

    76     Xml::CParser* iParser;

    77 

    78     CEntry* iEntry;

    79 

    80     enum TState {

    81         EInvalid,

    82         EValid

    83     } iState;

    84 };

    85 

    86 #endif