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//------------------------------------------------------------------------------
// <copyright file="QilPatternVisitor.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
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 {
/// <summary>
/// Pattern visitor base internal class
/// </summary>
internal abstract class QilPatternVisitor : QilReplaceVisitor {
private QilPatterns patterns;
private int replacementCnt;
private int lastReplacement;
private int threshold = Int32.MaxValue;
/// <summary>
/// Constructor.
/// </summary>
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; }
}
/// <summary>
/// Called when a pattern has matched, but before the replacement code is executed. If this
/// method returns false, then the replacement code is skipped.
/// </summary>
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;
}
/// <summary>
/// Called when a pattern has matched and after replacement code is executed.
/// </summary>
protected virtual QilNode Replace(int pattern, QilNode original, QilNode replacement) {
replacement.SourceLine = original.SourceLine;
return replacement;
}
/// <summary>
/// Called when all replacements have already been made and all annotations are complete.
/// </summary>
protected virtual QilNode NoReplace(QilNode node) {
return node;
}
//-----------------------------------------------
// QilVisitor overrides
//-----------------------------------------------
/// <summary>
/// Visit children of this node first, then pattern match on the node itself.
/// </summary>
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
//-----------------------------------------------
/// <summary>
/// A bit vector holding a set of rewrites.
/// </summary>
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];
}
}
}
}
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