FreeIndexList.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / FreeIndexList.cs / 1 / FreeIndexList.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace Microsoft.InfoCards
{ 
    using System;
    using System.Collections; 
    using System.Collections.Generic; 
    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace;
 
    //
    // Summary:
    //  Manages the list of Free LocalIds in an IndexDataBuffer class
    // 
    // Remarks:
    //  This is for internal file store use only. 
    // 
    internal class FreeIndexList
    { 
       Dictionary< Int32, Int32 > m_list;

        //
        // Summary: 
        //  Creates an instance of FreeIndexList
        // Parameters: 
        //  size:   the initial size for the internal Int32 array 
        //
        public FreeIndexList( int size ) 
        {
            if( size <= 0 )
            {
               //"value must be > 0" 
                throw IDT.ThrowHelperError( new ArgumentOutOfRangeException(
                                "size", 
                                size, 
                                SR.GetString( SR.StoreFreeListSizeOutOfRange ) ) );
            } 

            m_list = new Dictionary( size );

        } 

        // 
        // Summary: 
        //  Determins if the specified LocalId is current in the FreeList
        // 
        // Remarks:
        //
        // Parameters:
        //  value:      the value of the LocalId to test. 
        //
        public bool Contains( Int32 value ) 
        { 
            if( value <= 0 )
            { 
               //"value must be > 0"
                throw IDT.ThrowHelperError( new ArgumentOutOfRangeException(
                                "value",
                                value, 
                                SR.GetString( SR.StoreFreeListValueOutOfRange ) ) );
            } 
 

            return m_list.ContainsKey( value ); 
        }

        //
        // Summary: 
        //  Adds a LocalId to the free list
        // 
        // Remarks: 
        //
        // Parameters: 
        //  value:      the value to add to the free list
        //
        public void Put( Int32 value )
        { 
            if( value <= 0 )
            { 
                throw IDT.ThrowHelperError( new ArgumentOutOfRangeException( 
                                "value",
                                value, 
                                SR.GetString( SR.StoreFreeListValueOutOfRange ) ) );
            }
            m_list.Add( value, value );
        } 

        // 
        // Summary: 
        //  Get the first free index id available.
        // 
        // Returns:
        //  The first free item available.
        //
        // 
        // Review: A straight hash table would be better here.
        // 
        public Int32 GetNext() 
        {
            int next = -1; 
            if( m_list.Count > 0 )
            {
                using( IEnumerator enumerator = m_list.Keys.GetEnumerator() )
                { 
                    enumerator.MoveNext();
                    next = enumerator.Current; 
                } 
                m_list.Remove( next );
            } 


            return next;
 
        }
 
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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