CacheAxisQuery.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / CacheAxisQuery.cs / 1 / CacheAxisQuery.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace MS.Internal.Xml.XPath { 
    using System;
    using System.Xml; 
    using System.Xml.XPath;
    using System.Diagnostics;
    using System.Collections.Generic;
 
    internal abstract class CacheAxisQuery : BaseAxisQuery {
        // int count; -- we reusing it here 
        protected List outputBuffer; 

        public CacheAxisQuery(Query qyInput, string name, string prefix, XPathNodeType typeTest) : base(qyInput, name, prefix, typeTest)  { 
            this.outputBuffer = new List();
            this.count = 0;
        }
        protected CacheAxisQuery(CacheAxisQuery other) : base(other) { 
            this.outputBuffer = new List(other.outputBuffer);
            this.count = other.count; 
        } 

        public override void Reset() { 
            this.count = 0;
        }

        public override object Evaluate(XPathNodeIterator context) { 
            base.Evaluate(context);
            outputBuffer.Clear(); 
            return this; 
        }
 
        public override XPathNavigator Advance() {
            Debug.Assert(0 <= count && count <= outputBuffer.Count);
            if (count < outputBuffer.Count) {
                return outputBuffer[count++]; 
            }
            return null; 
        } 

        public override XPathNavigator Current { 
            get {
                Debug.Assert(0 <= count && count <= outputBuffer.Count);
                if (count == 0) {
                    return null; 
                }
                return outputBuffer[count - 1]; 
            } 
        }
 
        public override int CurrentPosition   { get { return count; } }
        public override int Count             { get { return outputBuffer.Count; } }
        public override QueryProps Properties { get { return QueryProps.Merge | QueryProps.Cached | QueryProps.Position | QueryProps.Count; } }
    } 
}

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

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