CopyOfAction.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / XsltOld / CopyOfAction.cs / 1305376 / CopyOfAction.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Xml.Xsl.XsltOld { 
    using Res = System.Xml.Utils.Res;
    using System; 
    using System.Diagnostics;
    using System.Xml;
    using System.Xml.XPath;
    using MS.Internal.Xml.XPath; 

    internal class CopyOfAction : CompiledAction { 
        private const int ResultStored  = 2; 
        private const int NodeSetCopied = 3;
 
        private int    selectKey   = Compiler.InvalidQueryKey;

        internal override void Compile(Compiler compiler) {
            CompileAttributes(compiler); 
            CheckRequiredAttribute(compiler, selectKey != Compiler.InvalidQueryKey, "select");
            CheckEmpty(compiler); 
        } 

        internal override bool CompileAttribute(Compiler compiler) { 
            string name   = compiler.Input.LocalName;
            string value  = compiler.Input.Value;
            if (Ref.Equal(name, compiler.Atoms.Select)) {
                this.selectKey = compiler.AddQuery(value); 
            }
            else { 
                return false; 
            }
 
            return true;
        }

        internal override void Execute(Processor processor, ActionFrame frame) { 
            Debug.Assert(processor != null && frame != null);
 
            switch (frame.State) { 
            case Initialized:
                Debug.Assert(frame.NodeSet != null); 
                Query query = processor.GetValueQuery(this.selectKey);
                object result = query.Evaluate(frame.NodeSet);

                if (result is XPathNodeIterator) { 
                    // we cash this query because otherwise current() works incorrectly. Bug#382166.
                    // To be perfect we should use frame.NewNodeSet here 
                    processor.PushActionFrame(CopyNodeSetAction.GetAction(), new XPathArrayIterator(query)); 
                    frame.State = NodeSetCopied;
                    break; 
                }

                XPathNavigator nav = result as XPathNavigator;
                if (nav != null) { 
                    processor.PushActionFrame(CopyNodeSetAction.GetAction(), new XPathSingletonIterator(nav));
                    frame.State = NodeSetCopied; 
                    break; 
                }
 
                string value = XmlConvert.ToXPathString(result);
                if (processor.TextEvent(value)) {
                    frame.Finished();
                } else { 
                    frame.StoredOutput = value;
                    frame.State        = ResultStored; 
                } 
                break;
 
            case ResultStored:
                Debug.Assert(frame.StoredOutput != null);
                processor.TextEvent(frame.StoredOutput);
                frame.Finished(); 
                break;
 
            case NodeSetCopied: 
                Debug.Assert(frame.State == NodeSetCopied);
                frame.Finished(); 
                break;
            }
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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