/**************************************************************
 * 
 * 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 _BPARR_HXX
#define _BPARR_HXX

#include <tools/solar.h>
#include <tools/debug.hxx>

#include <deque>

class BigPtrArray;

/** Base class for container entries
*/
class BigPtrEntry
{
	friend class BigPtrArray;
	BigPtrArray* pBigPtrArray_;
    sal_uLong pos_;	
    
protected:
	BigPtrEntry() : pBigPtrArray_(0), pos_(0) 
    {}
    
	virtual ~BigPtrEntry() 
    {}

	sal_uLong GetPos() const
    {
        return pos_;
    }
    
	BigPtrArray& GetArray() const
    {
        return *pBigPtrArray_;
    }
};

typedef BigPtrEntry* ElementPtr;
typedef sal_Bool (*FnForEach)(const ElementPtr&, void* pArgs);

/** A container abstraction
*/
class BigPtrArray
{
public:    
    typedef std::deque<ElementPtr> Container_t;
    
public:
    /**
    */
	BigPtrArray();
    
    /** Return the number of entries inserted
        into the array
    */
	sal_uLong Count() const;

    /** Insert an Element into the array at a certain
        position
        
        @param rElem
        [in] the element
        
        @param pos
        [in] the position where to insert the element.
        
        @pre (pos >= 0 && pos <= BigPtrArray.Count())
        @post (((oldCount + 1) == BigPtrArray.Count()) && BigPtrArray[pos] == rElem)
    */
	void Insert(const ElementPtr& rElem, sal_uLong pos);
    
    /** Remove a specified number of elements starting at a certain position.
    
        @param pos
        [in] the position where to start removing elements
        
        @param n
        [in] the number of elements to remove
        
        @pre (pos < BigPtrArray.Count() && n <= BigPtrArray.Count())
        @post ((oldCount - n) == BigPtrArray.Count())
    */
	void Remove(sal_uLong pos, sal_uLong n = 1);
    
    /** Move an entry from a certain position to another on.
        
        @param from
        [in] 
        
        @param to
        [in] 
    */
	void Move(sal_uLong fromPos, sal_uLong toPos);
    
    /** Replace an entry at a certain position
    
        @param pos
        [in] the position of the entry
        
        @param rElem 
        [in] the new entry
        
        @pre pos < BigPtrArray.Count()
        @post (oldCount == BigPtrArray.Count() && BigPtrArray[pos] == rElem) 
    */
	void Replace(sal_uLong pos, const ElementPtr& rElem);

    /** Get the entry at a certain index
        
        @param pos
        [in] the position of the entry
        
        @pre pos < BigPtrArray.Count()
    */
	ElementPtr operator[](sal_uLong pos) const;

    /** 
    */
	void ForEach(FnForEach fn, void* pArgs = NULL);
	
    /**
    */
	void ForEach(sal_uLong fromPos, sal_uLong toPos, FnForEach fn, void* pArgs = NULL);

private:
    
    void FixElementIndizes(Container_t::const_iterator begin, Container_t::const_iterator end) const;
    
private:
    Container_t container_;
};

#endif