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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 *************************************************************/



#ifndef METAINFOREADER_HXX_INCLUDED
#define METAINFOREADER_HXX_INCLUDED

#include "internal/basereader.hxx"
#include "internal/types.hxx"

class ITag;
class CKeywordsTag;
class CSimpleTag;
class CDummyTag;

class CMetaInfoReader : public CBaseReader
{
public:
	virtual ~CMetaInfoReader();

	CMetaInfoReader( const std::string& DocumentName );

	CMetaInfoReader( void* stream, zlib_filefunc_def* fa);

	/** check if the Tag is in the target meta.xml file.

		@param TagName
		the name of the tag that will be retrive.
	*/
	bool hasTag(std::wstring TagName) const;


	/** Get a specific tag content, compound tags will be returned as comma separated list.

		@param TagName
		the name of the tag that will be retrive.
	*/
	std::wstring getTagData( const std::wstring& TagName);

	/** check if the a tag has the specific attribute.

		@param TagName
		the name of the tag.
		@param AttributeName
		the name of the attribute.
	*/
	bool hasTagAttribute( const std::wstring TagName,  std::wstring AttributeName);

	/** Get a specific attribute content.

		@param TagName
		the name of the tag.
		@param AttributeName
		the name of the attribute.
	*/
	std::wstring getTagAttribute( const std::wstring TagName,  std::wstring AttributeName);

	/** Get the default language of the whole document.
	*/
	LocaleSet_t getDefaultLocale( );

protected: // protected because its only an implementation relevant class

	/** start_element occurs when a tag is start.

		@param raw_name
		raw name of the tag.
		@param local_name
		local name of the tag.
		@param attributes
		attribute structure.
	*/
	virtual void start_element(
		const std::wstring& raw_name, 
		const std::wstring& local_name, 
		const XmlTagAttributes_t& attributes);

	/** end_element occurs when a tag is closed

		@param raw_name
		raw name of the tag.
		@param local_name
		local name of the tag.
	*/
	virtual void end_element(
		const std::wstring& raw_name, const std::wstring& local_name);

	/** characters occurs when receiving characters

		@param character
		content of the information received.
	*/
	virtual void characters(const std::wstring& character);

protected: 
	/** choose an appropriate tag reader to handle the tag.

		@param tag_name
		the name of the tag.
		@param XmlAttributes
		attribute structure of the tag to save in.
	*/
	ITag* chooseTagReader( 
		const std::wstring& tag_name, const XmlTagAttributes_t& XmlAttributes );

	/** save the received content into structure.

		@param tag_name
		the name of the tag.
	*/
	void saveTagContent( const std::wstring& tag_name );

private:
	XmlTags_t      m_AllMetaInfo;

private:
    std::stack<ITag*> m_TagBuilderStack;

private:
	CKeywordsTag* m_pKeywords_Builder;
	CDummyTag*   m_pDummy_Builder;
	CSimpleTag* m_pSimple_Builder;
}; 

#endif