xref: /aoo42x/main/connectivity/source/inc/TSortIndex.hxx (revision caf5cd79)

/**************************************************************
 *
 * 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
 * under the License.
 *
 *************************************************************/


#ifndef CONNECTIVITY_TSORTINDEX_HXX
#define CONNECTIVITY_TSORTINDEX_HXX

#include "connectivity/dbtoolsdllapi.hxx"
#include "TKeyValue.hxx"

namespace connectivity
{
	typedef enum
	{
		SQL_ORDERBYKEY_NONE,		// do not sort
		SQL_ORDERBYKEY_DOUBLE,		// numeric key
		SQL_ORDERBYKEY_STRING		// String Key
	} OKeyType;

	typedef enum
	{
		SQL_ASC		= 1,			// ascending
		SQL_DESC	= -1			// otherwise
	} TAscendingOrder;

	class OKeySet;
	class OKeyValue;				// simple class which holds a sal_Int32 and a ::std::vector<ORowSetValueDecoratorRef>

	/**
		The class OSortIndex can be used to implement a sorted index.
		This can depend on the fields which should be sorted.
	*/
	class OOO_DLLPUBLIC_DBTOOLS OSortIndex
	{
	public:
		typedef ::std::vector< ::std::pair<sal_Int32,OKeyValue*> >	TIntValuePairVector;
		typedef ::std::vector<OKeyType>								TKeyTypeVector;

	private:
		TIntValuePairVector			    m_aKeyValues;
		TKeyTypeVector				    m_aKeyType;
        ::std::vector<TAscendingOrder>  m_aAscending;
		sal_Bool					    m_bFrozen;

	public:

		OSortIndex(	const ::std::vector<OKeyType>& _aKeyType,
                    const ::std::vector<TAscendingOrder>& _aAscending);

		~OSortIndex();

		inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW( () )
			{ return ::rtl_allocateMemory( nSize ); }
		inline static void * SAL_CALL operator new( size_t,void* _pHint ) SAL_THROW( () )
			{ return _pHint; }
		inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW( () )
			{ ::rtl_freeMemory( pMem ); }
		inline static void SAL_CALL operator delete( void *,void* ) SAL_THROW( () )
			{  }


		/**
			AddKeyValue appends a new value.
			@param
				pKeyValue	the keyvalue to be appended
			ATTENTION: when the sortindex is already frozen the parameter will be deleted
		*/
		void AddKeyValue(OKeyValue * pKeyValue);

		/**
			Freeze freezes the sortindex so that new values could only be appended by their value
		*/
		void Freeze();

		/**
			CreateKeySet creates the keyset which vaalues could be used to travel in your table/result
			The returned keyset is frozen.
		*/
		::vos::ORef<OKeySet> CreateKeySet();



		// look at the name
		sal_Bool IsFrozen() const { return m_bFrozen; }
		// returns the current size of the keyvalues
		sal_Int32 Count()	const { return m_aKeyValues.size(); }
		/** GetValue returns the value at position nPos (1..n) [sorted access].
			It only allowed to call this method after the sortindex has been frozen.
		*/

		sal_Int32 GetValue(sal_Int32 nPos) const;

		inline const ::std::vector<OKeyType>& getKeyType() const { return m_aKeyType; }
        inline TAscendingOrder getAscending(::std::vector<TAscendingOrder>::size_type _nPos) const { return m_aAscending[_nPos]; }

	};

	/**
		The class OKeySet is a refcountable vector which also has a state.
		This state gives information about if the keyset is fixed.
	*/
	class OOO_DLLPUBLIC_DBTOOLS OKeySet : public ORefVector<sal_Int32>
	{
		sal_Bool m_bFrozen;
	public:
		OKeySet()
			: ORefVector<sal_Int32>()
			, m_bFrozen(sal_False){}
		OKeySet(Vector::size_type _nSize)
			: ORefVector<sal_Int32>(_nSize)
			, m_bFrozen(sal_False){}

		sal_Bool	isFrozen() const						{ return m_bFrozen; }
		void		setFrozen(sal_Bool _bFrozen=sal_True)	{ m_bFrozen = _bFrozen; }
	};
}
#endif // CONNECTIVITY_TSORTINDEX_HXX