author | Simon Howkins <simonh@symbian.org> |
Mon, 15 Nov 2010 14:53:34 +0000 | |
branch | RCL_3 |
changeset 105 | 871af676edac |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005 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 the License "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: Feeds parsers base class. |
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* |
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*/ |
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#ifndef FEED_PARSER_H |
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#define FEED_PARSER_H |
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// INCLUDES |
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#include <e32base.h> |
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#include <xmlengdom.h> |
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// CONSTANTS |
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// MACROS |
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// FORWARD DECLARATIONS |
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class CFeedParser; |
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class CXmlUtils; |
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class RXmlEngDocument; |
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class TXmlEngElement; |
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class MFeedParserObserver; |
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// DATA TYPES |
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typedef void (*ElementHandlerFunctionL)(const CFeedParser& aParser, CXmlUtils& aXmlUtils, |
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TXmlEngElement aNode, TInt aValueId, MFeedParserObserver& aObserver); |
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struct ElementHandlerMapEntry |
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{ |
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TPtrC8 iElementNamespace; |
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TPtrC8 iElementName; |
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TInt iValueId; |
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ElementHandlerFunctionL iElementHandlerL; |
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}; |
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// FUNCTION PROTOTYPES |
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// CLASS DECLARATION |
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/** |
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* Feeds parsers base class. |
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* |
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* \b Library: FeedsEngine.lib |
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* |
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* @since 3.0 |
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*/ |
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class CFeedParser: public CBase |
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{ |
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public: // Destructor |
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/** |
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* Destructor. |
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*/ |
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virtual ~CFeedParser(); |
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protected: |
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/** |
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* C++ default constructor. |
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*/ |
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CFeedParser(CXmlUtils& aXmlUtils); |
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public: // New Methods |
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/** |
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* Creates a Feed instance from the given document. |
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* |
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* @since 3.0 |
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* @param aDocument A document. |
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* @param aObserver The parser's observer. |
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* @return void |
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*/ |
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virtual void ParseFeedL(RXmlEngDocument aDocument, |
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MFeedParserObserver& aObserver) = 0; |
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protected: // New Methods |
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/** |
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* Add a feed ElementHandler mapping. See AddMappingL. |
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* |
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* @since 3.0 |
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* @param aNamespace The namespace for this mapping -- utf8 encoding. |
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* @param aElementName The element name for this mapping -- utf8 encoding. |
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* @param aValueId The normalized value-id. |
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* @param aHandler The element handler function. |
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* @return void. |
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*/ |
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void AddFeedMappingL(const TDesC8& aNamespace, const TDesC8& aElementName, |
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TInt aValueId, ElementHandlerFunctionL aHandler); |
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/** |
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* Add a feed ElementHandler mapping. See AddMappingL. |
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* |
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* @since 3.0 |
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* @param aNode A node. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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void HandleFeedChildL(TXmlEngElement aNode, MFeedParserObserver& aObserver) const; |
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/** |
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* Add a item ElementHandler mapping. See AddMappingL. |
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* |
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* @since 3.0 |
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* @param aNamespace The namespace for this mapping -- utf8 encoding. |
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* @param aElementName The element name for this mapping -- utf8 encoding. |
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* @param aValueId The normalized value-id. |
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* @param aHandler The element handler function. |
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* @return void. |
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*/ |
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void AddItemMappingL(const TDesC8& aNamespace, const TDesC8& aElementName, |
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TInt aValueId, ElementHandlerFunctionL aHandler); |
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/** |
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* Add an item ElementHandler mapping. See AddMappingL. |
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* |
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* @since 3.0 |
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* @param aNode A node. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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void HandleItemChildL(TXmlEngElement aNode, MFeedParserObserver& aObserver) const; |
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/** |
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* An ElementHandler function that extracts the value from the |
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* child text nodes. |
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* |
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* @since 3.0 |
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* @param aParser The parser calling this method. |
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* @param aXmlUtils The xml util instance. |
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* @param aNode A node. |
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* @param aValueId The normalized value-id. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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static void ElementHandlerCDataL(const CFeedParser& aParser, CXmlUtils& aXmlUtils, |
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TXmlEngElement aNode, TInt aValueId, MFeedParserObserver& aObserver); |
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/** |
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* An ElementHandler function that extracts the value from the |
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* child text nodes then resolves any html entities and removes any markup. |
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* |
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* @since 3.0 |
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* @param aParser The parser calling this method. |
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* @param aXmlUtils The xml util instance. |
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* @param aNode A node. |
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* @param aValueId The normalized value-id. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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static void ElementHandlerTextL(const CFeedParser& aParser, CXmlUtils& aXmlUtils, |
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TXmlEngElement aNode, TInt aValueId, MFeedParserObserver& aObserver); |
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/** |
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* An ElementHandler function that extracts the value from a child |
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* url element. If the element doesn't contain any elements and it contains |
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* text it is extracted instead. |
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* |
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* @since 3.0 |
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* @param aParser The parser calling this method. |
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* @param aXmlUtils The xml util instance. |
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* @param aNode A node. |
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* @param aValueId The normalized value-id. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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static void ElementHandlerUrlChildL(const CFeedParser& aParser, CXmlUtils& aXmlUtils, |
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TXmlEngElement aNode, TInt aValueId, MFeedParserObserver& aObserver); |
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/** |
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* An ElementHandler function that extracts the value from the |
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* child text nodes. It further performs url related clean up. |
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* |
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* @since 3.0 |
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* @param aParser The parser calling this method. |
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* @param aXmlUtils The xml util instance. |
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* @param aNode A node. |
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* @param aValueId The normalized value-id. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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static void ElementHandlerUrlL(const CFeedParser& aParser, CXmlUtils& aXmlUtils, |
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TXmlEngElement aNode, TInt aValueId, MFeedParserObserver& aObserver); |
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/** |
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* An ElementHandler function that extracts the date from the |
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* child text nodes. It can handle date formats defined in RFC 3339, RFC 822, |
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* RFC 1123, RFC 850, and RFC 1036 |
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* |
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* @since 3.0 |
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* @param aParser The parser calling this method. |
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* @param aXmlUtils The xml util instance. |
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* @param aNode A node. |
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* @param aValueId The normalized value-id. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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static void ElementHandlerDateL(const CFeedParser& aParser, CXmlUtils& aXmlUtils, |
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TXmlEngElement aNode, TInt aValueId, MFeedParserObserver& aObserver); |
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private: // New Methods |
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/** |
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* Makes a mapping between an element's namespance and name with the normalized |
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* value-id (i.e. title or description) and a function which extracts out |
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* relevant data and applies it to a provided ValueHolder using the value-id |
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* (see HandleChildL). |
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* |
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* @since 3.0 |
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* @param aMappings Either iFeedMappings or iItemMapping. |
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* @param aNamespace The namespace for this mapping. |
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* @param aElementName The element name for this mapping. |
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* @param aValueId The normalized value-id. |
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* @param aHandler The element handler function. |
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* @return void. |
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*/ |
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void AddMappingL(RArray<ElementHandlerMapEntry>& aMappings, const TDesC8& aNamespace, |
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const TDesC8& aElementName, TInt aValueId, ElementHandlerFunctionL aHandler); |
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|
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/** |
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* Using the mapping defined by calls to AddMappingL it passes aNode, |
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* aValueHolder and associated value-id to the associated function. The method |
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* does what is needed to extract the relevant values from the node and applies |
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* them on aValueHolder (using the normalized value-id). |
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* |
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* @since 3.0 |
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* @param aMappings Either iFeedMappings or iItemMapping. |
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* @param aNode A node. |
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* @param aObserver The parser's observer. |
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* @return void. |
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*/ |
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void HandleChildL(const RArray<ElementHandlerMapEntry>& aMappings, TXmlEngElement aNode, |
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MFeedParserObserver& aObserver) const; |
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|
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/** |
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* Converts the given RFC 3339 date into a TTime. |
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* |
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* @since 3.1 |
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* @param aDateStr The date string. |
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* @param aDate The resulting TTime. |
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* @return void. |
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*/ |
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static void ParseRFC3339L(const TDesC8& aDateStr, TTime& aDate); |
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private: // Data |
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RArray<ElementHandlerMapEntry> iFeedMappings; |
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RArray<ElementHandlerMapEntry> iItemMappings; |
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protected: // Data |
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CXmlUtils& iXmlUtils; |
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}; |
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#endif // FEED_PARSER_H |
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// End of File |