QilPatternVisitor.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / QIL / QilPatternVisitor.cs / 1305376 / QilPatternVisitor.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
using System; 
using System.Collections; 
using System.Collections.Generic;
using System.Diagnostics; 
using System.Xml;
using System.Xml.Schema;
using System.Xml.Xsl;
 
namespace System.Xml.Xsl.Qil {
 
    ///  
    /// Pattern visitor base internal class
    ///  
    internal abstract class QilPatternVisitor : QilReplaceVisitor {
        private QilPatterns         patterns;
        private int                 replacementCnt;
        private int                 lastReplacement; 
        private int                 threshold = Int32.MaxValue;
 
        ///  
        /// Constructor.
        ///  
        public QilPatternVisitor(QilPatterns patterns, QilFactory f) : base(f) {
            Patterns = patterns;
        }
 
        public QilPatterns Patterns {
            get { return this.patterns; } 
            set { this.patterns = value; } 
        }
 
        public int Threshold {
            get { return this.threshold; }
            set { this.threshold = value; }
        } 

        public int ReplacementCount { 
            get { return this.replacementCnt; } 
        }
 
        public int LastReplacement {
            get { return this.lastReplacement; }
        }
 
        public bool Matching {
            get { return ReplacementCount < Threshold; } 
        } 

        ///  
        /// Called when a pattern has matched, but before the replacement code is executed.  If this
        /// method returns false, then the replacement code is skipped.
        /// 
        protected virtual bool AllowReplace(int pattern, QilNode original) { 
            // If still matching patterns,
            if (Matching) { 
                // Increment the replacement count 
                this.replacementCnt++;
 
                // Save the id of this pattern in case it's the last
                this.lastReplacement = pattern;

                return true; 
            }
 
            return false; 
        }
 
        /// 
        /// Called when a pattern has matched and after replacement code is executed.
        /// 
        protected virtual QilNode Replace(int pattern, QilNode original, QilNode replacement) { 
            replacement.SourceLine = original.SourceLine;
            return replacement; 
        } 

        ///  
        /// Called when all replacements have already been made and all annotations are complete.
        /// 
        protected virtual QilNode NoReplace(QilNode node) {
            return node; 
        }
 
 
        //-----------------------------------------------
        // QilVisitor overrides 
        //-----------------------------------------------

        /// 
        /// Visit children of this node first, then pattern match on the node itself. 
        /// 
        protected override QilNode Visit(QilNode node) { 
            if (node == null) 
                return VisitNull();
 
            node = VisitChildren(node);
            return base.Visit(node);
        }
 
        // Do not edit this region
        #region AUTOGENERATED 
        #region meta 
        protected override QilNode VisitQilExpression(QilExpression n) { return NoReplace(n); }
        protected override QilNode VisitFunctionList(QilList n) { return NoReplace(n); } 
        protected override QilNode VisitGlobalVariableList(QilList n) { return NoReplace(n); }
        protected override QilNode VisitGlobalParameterList(QilList n) { return NoReplace(n); }
        protected override QilNode VisitActualParameterList(QilList n) { return NoReplace(n); }
        protected override QilNode VisitFormalParameterList(QilList n) { return NoReplace(n); } 
        protected override QilNode VisitSortKeyList(QilList n) { return NoReplace(n); }
        protected override QilNode VisitBranchList(QilList n) { return NoReplace(n); } 
        protected override QilNode VisitOptimizeBarrier(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitUnknown(QilNode n) { return NoReplace(n); }
        #endregion 

        #region specials
        protected override QilNode VisitDataSource(QilDataSource n) { return NoReplace(n); }
        protected override QilNode VisitNop(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitError(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitWarning(QilUnary n) { return NoReplace(n); } 
        #endregion 

        #region variables 
        protected override QilNode VisitFor(QilIterator n) { return NoReplace(n); }
        protected override QilNode VisitForReference(QilIterator n) { return NoReplace(n); }
        protected override QilNode VisitLet(QilIterator n) { return NoReplace(n); }
        protected override QilNode VisitLetReference(QilIterator n) { return NoReplace(n); } 
        protected override QilNode VisitParameter(QilParameter n) { return NoReplace(n); }
        protected override QilNode VisitParameterReference(QilParameter n) { return NoReplace(n); } 
        protected override QilNode VisitPositionOf(QilUnary n) { return NoReplace(n); } 
        #endregion
 
        #region literals
        protected override QilNode VisitTrue(QilNode n) { return NoReplace(n); }
        protected override QilNode VisitFalse(QilNode n) { return NoReplace(n); }
        protected override QilNode VisitLiteralString(QilLiteral n) { return NoReplace(n); } 
        protected override QilNode VisitLiteralInt32(QilLiteral n) { return NoReplace(n); }
        protected override QilNode VisitLiteralInt64(QilLiteral n) { return NoReplace(n); } 
        protected override QilNode VisitLiteralDouble(QilLiteral n) { return NoReplace(n); } 
        protected override QilNode VisitLiteralDecimal(QilLiteral n) { return NoReplace(n); }
        protected override QilNode VisitLiteralQName(QilName n) { return NoReplace(n); } 
        protected override QilNode VisitLiteralType(QilLiteral n) { return NoReplace(n); }
        protected override QilNode VisitLiteralObject(QilLiteral n) { return NoReplace(n); }
        #endregion
 
        #region boolean operators
        protected override QilNode VisitAnd(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitOr(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitNot(QilUnary n) { return NoReplace(n); }
        #endregion 

        #region choice
        protected override QilNode VisitConditional(QilTernary n) { return NoReplace(n); }
        protected override QilNode VisitChoice(QilChoice n) { return NoReplace(n); } 
        #endregion
 
        #region collection operators 
        protected override QilNode VisitLength(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitSequence(QilList n) { return NoReplace(n); } 
        protected override QilNode VisitUnion(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitIntersection(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitDifference(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitAverage(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitSum(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitMinimum(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitMaximum(QilUnary n) { return NoReplace(n); } 
        #endregion
 
        #region arithmetic operators
        protected override QilNode VisitNegate(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitAdd(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitSubtract(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitMultiply(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitDivide(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitModulo(QilBinary n) { return NoReplace(n); } 
        #endregion
 
        #region string operators
        protected override QilNode VisitStrLength(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitStrConcat(QilStrConcat n) { return NoReplace(n); }
        protected override QilNode VisitStrParseQName(QilBinary n) { return NoReplace(n); } 
        #endregion
 
        #region value comparison operators 
        protected override QilNode VisitNe(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitEq(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitGt(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitGe(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitLt(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitLe(QilBinary n) { return NoReplace(n); } 
        #endregion
 
        #region node comparison operators 
        protected override QilNode VisitIs(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitAfter(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitBefore(QilBinary n) { return NoReplace(n); }
        #endregion

        #region loops 
        protected override QilNode VisitLoop(QilLoop n) { return NoReplace(n); }
        protected override QilNode VisitFilter(QilLoop n) { return NoReplace(n); } 
        #endregion 

        #region sorting 
        protected override QilNode VisitSort(QilLoop n) { return NoReplace(n); }
        protected override QilNode VisitSortKey(QilSortKey n) { return NoReplace(n); }
        protected override QilNode VisitDocOrderDistinct(QilUnary n) { return NoReplace(n); }
        #endregion 

        #region function definition and invocation 
        protected override QilNode VisitFunction(QilFunction n) { return NoReplace(n); } 
        protected override QilNode VisitFunctionReference(QilFunction n) { return NoReplace(n); }
        protected override QilNode VisitInvoke(QilInvoke n) { return NoReplace(n); } 
        #endregion

        #region XML navigation
        protected override QilNode VisitContent(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitAttribute(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitParent(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitRoot(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitXmlContext(QilNode n) { return NoReplace(n); }
        protected override QilNode VisitDescendant(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitDescendantOrSelf(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitAncestor(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitAncestorOrSelf(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitPreceding(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitFollowingSibling(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitPrecedingSibling(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitNodeRange(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitDeref(QilBinary n) { return NoReplace(n); }
        #endregion 

        #region XML construction
        protected override QilNode VisitElementCtor(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitAttributeCtor(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitCommentCtor(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitPICtor(QilBinary n) { return NoReplace(n); } 
        protected override QilNode VisitTextCtor(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitRawTextCtor(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitDocumentCtor(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitNamespaceDecl(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitRtfCtor(QilBinary n) { return NoReplace(n); }
        #endregion
 
        #region Node properties
        protected override QilNode VisitNameOf(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitLocalNameOf(QilUnary n) { return NoReplace(n); } 
        protected override QilNode VisitNamespaceUriOf(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitPrefixOf(QilUnary n) { return NoReplace(n); } 
        #endregion

        #region Type operators
        protected override QilNode VisitTypeAssert(QilTargetType n) { return NoReplace(n); } 
        protected override QilNode VisitIsType(QilTargetType n) { return NoReplace(n); }
        protected override QilNode VisitIsEmpty(QilUnary n) { return NoReplace(n); } 
        #endregion 

        #region XPath operators 
        protected override QilNode VisitXPathNodeValue(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitXPathFollowing(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitXPathPreceding(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitXPathNamespace(QilUnary n) { return NoReplace(n); } 
        #endregion
 
        #region XSLT 
        protected override QilNode VisitXsltGenerateId(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitXsltInvokeLateBound(QilInvokeLateBound n) { return NoReplace(n); } 
        protected override QilNode VisitXsltInvokeEarlyBound(QilInvokeEarlyBound n) { return NoReplace(n); }
        protected override QilNode VisitXsltCopy(QilBinary n) { return NoReplace(n); }
        protected override QilNode VisitXsltCopyOf(QilUnary n) { return NoReplace(n); }
        protected override QilNode VisitXsltConvert(QilTargetType n) { return NoReplace(n); } 
        #endregion
 
        #endregion 

 
        //-----------------------------------------------
        // Helper methods
        //-----------------------------------------------
 
        /// 
        /// A bit vector holding a set of rewrites. 
        ///  
        sealed internal class QilPatterns {
            private BitArray bits; 

            private QilPatterns(QilPatterns toCopy) {
                this.bits = new BitArray(toCopy.bits);
            } 
            public QilPatterns(int szBits, bool allSet) {
                this.bits = new BitArray(szBits, allSet); 
            } 
            public QilPatterns Clone() {
                return new QilPatterns(this); 
            }
            public void ClearAll() {
                this.bits.SetAll(false);
            } 
            public void Add(int i) {
                this.bits.Set(i, true); 
            } 
            public bool IsSet(int i) {
                return this.bits[i]; 
            }

        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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QilPatternVisitor.cs source code in C# .NET

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