1 /*

     2 * Copyright (c) 2004-2008 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 using System;

    19 using System.Collections;

    20 using SymbianTree;

    21 

    22 namespace SymBuildParsingLib.Parser.Framework.Document

    23 {

    24 	public abstract class SymParserDocument : SymDocument

    25 	{

    26 		#region Constructors & destructor

    27 		public SymParserDocument( SymParserDocumentContext aContext )

    28 		{

    29 			aContext.Document = this;

    30 			iContextStack.Push( aContext );

    31 		}

    32 		#endregion

    33 

    34 		#region API

    35 		public void PushContext( SymParserDocumentContext aContext )

    36 		{

    37 			iContextStack.Push( aContext );

    38 		}

    39 

    40 		public SymParserDocumentContext PopContext()

    41 		{

    42 			SymParserDocumentContext top = (SymParserDocumentContext) iContextStack.Peek();

    43 			return PopContext( top );

    44 		}

    45 

    46 		public SymParserDocumentContext PopContext( SymParserDocumentContext aExpected )

    47 		{

    48 			// Can't pop off the last context

    49 			System.Diagnostics.Debug.Assert( iContextStack.Count > 1 );

    50 			SymParserDocumentContext top = (SymParserDocumentContext) iContextStack.Peek();

    51 			//

    52 			if	( aExpected.Equals( aExpected ) == false )

    53 			{

    54 				throw new ArgumentException( "Cannot pop context - expectations not met during pop operation" );

    55 			}

    56 			//

    57 			iContextStack.Pop();

    58 			return top;

    59 		}

    60 		#endregion

    61 

    62 		#region Properties

    63 		public SymParserDocumentContext Context

    64 		{

    65 			get

    66 			{

    67 				System.Diagnostics.Debug.Assert( iContextStack.Count > 0 );

    68 				SymParserDocumentContext ret = (SymParserDocumentContext) iContextStack.Peek();

    69 				return ret;

    70 			}

    71 		}

    72 		#endregion

    73 

    74 		#region Data members

    75 		private Stack iContextStack = new Stack();

    76 		#endregion

    77 	}

    78 }