/**************************************************************
 * 
 * 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 _STORE_STORPAGE_HXX_
#define _STORE_STORPAGE_HXX_ "$Revision: 1.6.8.2 $"

#include "sal/types.h"

#include "object.hxx"
#include "lockbyte.hxx"

#include "storbase.hxx"
#include "storbios.hxx"
#include "stortree.hxx"

namespace store
{

struct OStoreDirectoryPageData;
class  OStoreDirectoryPageObject;

/*========================================================================
 *
 * OStorePageManager interface.
 *
 *======================================================================*/
class OStorePageManager : public store::OStorePageBIOS
{
public:
	/** Construction.
	 */
	OStorePageManager (void);

	/** Initialization (two-phase construction).
	 */
    virtual storeError initialize (
		ILockBytes *    pLockBytes,
		storeAccessMode eAccessMode,
		sal_uInt16 &    rnPageSize);

	/** isValid.
	 *  @return sal_True  upon successful initialization,
	 *          sal_False otherwise.
	 */
	inline sal_Bool isValid (void) const;

	/** DirectoryPage I/O (managed).
	 */
	static storeError namei (
		const rtl_String *pPath,
		const rtl_String *pName,
		OStorePageKey    &rKey);

	storeError iget (
		OStoreDirectoryPageObject & rPage, // [out]
		sal_uInt32                  nAttrib,
		const rtl_String *          pPath,
		const rtl_String *          pName,
		storeAccessMode             eMode);

	storeError iterate (
		OStorePageKey &  rKey,
		OStorePageLink & rLink,
		sal_uInt32 &     rAttrib);

	/** attrib [nAttrib = ((nAttrib & ~nMask1) | nMask2)].
     *  @see store_attrib()
	 */
	storeError attrib (
		const OStorePageKey &rKey,
		sal_uInt32           nMask1,
		sal_uInt32           nMask2,
		sal_uInt32          &rAttrib);

	/** link (insert Source Key as hardlink to Destination).
     *  @see store_link()
	 */
	storeError link (
		const OStorePageKey &rSrcKey,
		const OStorePageKey &rDstKey);

	/** symlink (insert Source DirectoryPage as symlink to Destination).
     *  @see store_symlink()
	 */
	storeError symlink (
		const rtl_String    *pSrcPath,
		const rtl_String    *pSrcName,
		const OStorePageKey &rDstKey);

	/** rename.
     *  @see store_rename()
	 */
	storeError rename (
		const OStorePageKey &rSrcKey,
		const rtl_String    *pDstPath,
		const rtl_String    *pDstName);

	/** remove.
     *  @see store_remove()
	 */
	storeError remove (
		const OStorePageKey &rKey);

	/** rebuild (combines recover and compact from 'Src' to 'Dst').
	 *  @param  pSrcLB [in] accessed readonly.
	 *  @param  pDstLB [in] truncated and accessed readwrite (as initialize()).
	 *  @return store_E_None upon success.
     *
     *  @see store_rebuildFile()
	 */
	storeError rebuild (
		ILockBytes *pSrcLB,
		ILockBytes *pDstLB);

	/** IStoreHandle.
	 */
	virtual sal_Bool SAL_CALL isKindOf (sal_uInt32 nTypeId);

protected:
	/** Destruction.
	*/
	virtual ~OStorePageManager (void);

private:
	/** Implementation.
	*/
	typedef OStorePageBIOS            base;
	typedef OStorePageManager         self;

	typedef OStoreBTreeEntry          entry;
	typedef OStoreBTreeNodeData       page;
	typedef OStoreBTreeNodeObject     node;

    typedef OStoreDirectoryPageData   inode;
    typedef PageHolderObject< inode > inode_holder_type;

	/** IStoreHandle TypeId.
	 */
	static const sal_uInt32 m_nTypeId;

	/** IStoreHandle query() template function specialization.
	 */
	friend OStorePageManager*
	SAL_CALL query<> (IStoreHandle *pHandle, OStorePageManager*);

	/** Representation.
	*/
    OStoreBTreeRootObject m_aRoot;

	/** DirectoryPage I/O (managed).
	 */
	storeError load_dirpage_Impl ( // @@@ => private: iget() @@@
		const OStorePageKey       &rKey,
		OStoreDirectoryPageObject &rPage);

	storeError save_dirpage_Impl ( // @@@ => private: iget(), rebuild() @@@
		const OStorePageKey       &rKey,
		OStoreDirectoryPageObject &rPage);

	/** find_lookup (node page and index, w/o split).
	*/
	storeError find_lookup (
        OStoreBTreeNodeObject & rNode,
        sal_uInt16 &            rIndex,
        OStorePageKey const &   rKey);

	/** remove (possibly down from root).
	*/
	storeError remove_Impl (entry & rEntry);

	/** Not implemented.
	*/
	OStorePageManager (const OStorePageManager&);
	OStorePageManager& operator= (const OStorePageManager&);
};

inline sal_Bool OStorePageManager::isValid (void) const
{
	return (base::isValid() /* @@@ NYI && (m_aRoot.is()) */);
}

template<> inline OStorePageManager*
SAL_CALL query (IStoreHandle *pHandle, OStorePageManager*)
{
	if (pHandle && pHandle->isKindOf (OStorePageManager::m_nTypeId))
	{
		// Handle is kind of OStorePageManager.
		return static_cast<OStorePageManager*>(pHandle);
	}
	return 0;
}

/*========================================================================
 *
 * The End.
 *
 *======================================================================*/

} // namespace store

#endif /* !_STORE_STORPAGE_HXX_ */