Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Query / InternalTrees / Rule.cs / 1 / Rule.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Globalization; namespace System.Data.Query.InternalTrees { ////// A Rule - more specifically, a transformation rule - describes an action that is to /// be taken when a specific kind of subtree is found in the tree /// internal abstract class Rule { ////// The "callback" function for each rule. /// Every callback function must return true if the subtree has /// been modified (or a new subtree has been returned); and must return false /// otherwise. If the root of the subtree has not changed, but some internal details /// of the subtree have changed, it is the responsibility of the rule to update any /// local bookkeeping information. /// /// The rule processing context /// the subtree to operate on /// possibly transformed subtree ///transformation status - true, if there was some change; false otherwise internal delegate bool ProcessNodeDelegate(RuleProcessingContext context, Node subTree, out Node newSubTree); #region private state private ProcessNodeDelegate m_nodeDelegate; private OpType m_opType; #endregion #region Constructors ////// Basic constructor /// /// The OpType we're interested in processing /// The callback to invoke protected Rule(OpType opType, ProcessNodeDelegate nodeProcessDelegate) { Debug.Assert(nodeProcessDelegate != null, "null process delegate"); Debug.Assert(opType != OpType.NotValid, "bad OpType"); Debug.Assert(opType != OpType.Leaf, "bad OpType - Leaf"); m_opType = opType; m_nodeDelegate = nodeProcessDelegate; } #endregion #region protected methods #endregion #region public methods ////// Does the rule match the current node? /// /// the node in question ///true, if a match was found internal abstract bool Match(Node node); ////// We need to invoke the specified callback on the subtree in question - but only /// if the match succeeds /// /// Current rule processing context /// The node (subtree) to process /// the (possibly) modified subtree ///true, if the subtree was modified internal bool Apply(RuleProcessingContext ruleProcessingContext, Node node, out Node newNode) { // invoke the real callback return m_nodeDelegate(ruleProcessingContext, node, out newNode); } ////// The OpType we're interested in transforming /// internal OpType RuleOpType { get { return m_opType; } } #endregion } ////// A SimpleRule is a rule that specifies a specific OpType to look for, and an /// appropriate action to take when such an Op is identified /// internal sealed class SimpleRule : Rule { #region private state #endregion #region constructors ////// Basic constructor. /// /// The OpType we're interested in /// The callback to invoke when we see such an Op internal SimpleRule(OpType opType, ProcessNodeDelegate processDelegate) : base(opType, processDelegate) { } #endregion #region overriden methods internal override bool Match(Node node) { return node.Op.OpType == this.RuleOpType; } #endregion } ////// A PatternMatchRule allows for a pattern to be specified to identify interesting /// subtrees, rather than just an OpType /// internal sealed class PatternMatchRule: Rule { #region private state private Node m_pattern; #endregion #region constructors ////// Basic constructor /// /// The pattern to look for /// The callback to invoke when such a pattern is identified internal PatternMatchRule(Node pattern, ProcessNodeDelegate processDelegate) : base(pattern.Op.OpType, processDelegate) { Debug.Assert(pattern != null, "null pattern"); Debug.Assert(pattern.Op != null, "null pattern Op"); m_pattern = pattern; } #endregion #region private methods private bool Match(Node pattern, Node original) { if (pattern.Op.OpType == OpType.Leaf) return true; if (pattern.Op.OpType != original.Op.OpType) return false; if (pattern.Children.Count != original.Children.Count) return false; for (int i = 0; i < pattern.Children.Count; i++) if (!Match(pattern.Children[i], original.Children[i])) return false; return true; } #endregion #region overridden methods internal override bool Match(Node node) { return Match(m_pattern, node); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....], [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Globalization; namespace System.Data.Query.InternalTrees { ////// A Rule - more specifically, a transformation rule - describes an action that is to /// be taken when a specific kind of subtree is found in the tree /// internal abstract class Rule { ////// The "callback" function for each rule. /// Every callback function must return true if the subtree has /// been modified (or a new subtree has been returned); and must return false /// otherwise. If the root of the subtree has not changed, but some internal details /// of the subtree have changed, it is the responsibility of the rule to update any /// local bookkeeping information. /// /// The rule processing context /// the subtree to operate on /// possibly transformed subtree ///transformation status - true, if there was some change; false otherwise internal delegate bool ProcessNodeDelegate(RuleProcessingContext context, Node subTree, out Node newSubTree); #region private state private ProcessNodeDelegate m_nodeDelegate; private OpType m_opType; #endregion #region Constructors ////// Basic constructor /// /// The OpType we're interested in processing /// The callback to invoke protected Rule(OpType opType, ProcessNodeDelegate nodeProcessDelegate) { Debug.Assert(nodeProcessDelegate != null, "null process delegate"); Debug.Assert(opType != OpType.NotValid, "bad OpType"); Debug.Assert(opType != OpType.Leaf, "bad OpType - Leaf"); m_opType = opType; m_nodeDelegate = nodeProcessDelegate; } #endregion #region protected methods #endregion #region public methods ////// Does the rule match the current node? /// /// the node in question ///true, if a match was found internal abstract bool Match(Node node); ////// We need to invoke the specified callback on the subtree in question - but only /// if the match succeeds /// /// Current rule processing context /// The node (subtree) to process /// the (possibly) modified subtree ///true, if the subtree was modified internal bool Apply(RuleProcessingContext ruleProcessingContext, Node node, out Node newNode) { // invoke the real callback return m_nodeDelegate(ruleProcessingContext, node, out newNode); } ////// The OpType we're interested in transforming /// internal OpType RuleOpType { get { return m_opType; } } #endregion } ////// A SimpleRule is a rule that specifies a specific OpType to look for, and an /// appropriate action to take when such an Op is identified /// internal sealed class SimpleRule : Rule { #region private state #endregion #region constructors ////// Basic constructor. /// /// The OpType we're interested in /// The callback to invoke when we see such an Op internal SimpleRule(OpType opType, ProcessNodeDelegate processDelegate) : base(opType, processDelegate) { } #endregion #region overriden methods internal override bool Match(Node node) { return node.Op.OpType == this.RuleOpType; } #endregion } ////// A PatternMatchRule allows for a pattern to be specified to identify interesting /// subtrees, rather than just an OpType /// internal sealed class PatternMatchRule: Rule { #region private state private Node m_pattern; #endregion #region constructors ////// Basic constructor /// /// The pattern to look for /// The callback to invoke when such a pattern is identified internal PatternMatchRule(Node pattern, ProcessNodeDelegate processDelegate) : base(pattern.Op.OpType, processDelegate) { Debug.Assert(pattern != null, "null pattern"); Debug.Assert(pattern.Op != null, "null pattern Op"); m_pattern = pattern; } #endregion #region private methods private bool Match(Node pattern, Node original) { if (pattern.Op.OpType == OpType.Leaf) return true; if (pattern.Op.OpType != original.Op.OpType) return false; if (pattern.Children.Count != original.Children.Count) return false; for (int i = 0; i < pattern.Children.Count; i++) if (!Match(pattern.Children[i], original.Children[i])) return false; return true; } #endregion #region overridden methods internal override bool Match(Node node) { return Match(m_pattern, node); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- VirtualDirectoryMappingCollection.cs
- SettingsAttributeDictionary.cs
- _UriTypeConverter.cs
- XmlLoader.cs
- WebPartAuthorizationEventArgs.cs
- WorkflowItemsPresenter.cs
- Privilege.cs
- ParenthesizePropertyNameAttribute.cs
- Win32.cs
- TraceHandler.cs
- ShapingEngine.cs
- SystemIcmpV6Statistics.cs
- ZoomPercentageConverter.cs
- WorkflowRuntimeService.cs
- ToolboxSnapDragDropEventArgs.cs
- ModifiableIteratorCollection.cs
- VectorValueSerializer.cs
- DataChangedEventManager.cs
- SharedPerformanceCounter.cs
- OrderedEnumerableRowCollection.cs
- NetTcpBinding.cs
- NativeMethods.cs
- FragmentNavigationEventArgs.cs
- XMLUtil.cs
- SelectionHighlightInfo.cs
- _AutoWebProxyScriptWrapper.cs
- BuilderInfo.cs
- XmlQualifiedName.cs
- XmlSerializationGeneratedCode.cs
- DbConnectionPoolIdentity.cs
- DiscoveryClientChannelBase.cs
- KeyedHashAlgorithm.cs
- SecurityElement.cs
- SectionRecord.cs
- TypeElementCollection.cs
- SymDocumentType.cs
- DSASignatureDeformatter.cs
- DataGridHeaderBorder.cs
- ReflectionTypeLoadException.cs
- Model3DGroup.cs
- ClosableStream.cs
- PointLight.cs
- SqlParameterizer.cs
- VariantWrapper.cs
- streamingZipPartStream.cs
- ByteBufferPool.cs
- SqlWebEventProvider.cs
- XamlFxTrace.cs
- AmbientValueAttribute.cs
- TypeForwardedToAttribute.cs
- CorrelationManager.cs
- DbXmlEnabledProviderManifest.cs
- GeneralTransform3D.cs
- PeerPresenceInfo.cs
- ChooseAction.cs
- UITypeEditor.cs
- SrgsElementFactory.cs
- AnyAllSearchOperator.cs
- GZipUtils.cs
- XamlToRtfWriter.cs
- PackageStore.cs
- CatalogPart.cs
- XamlUtilities.cs
- MouseButtonEventArgs.cs
- EmptyControlCollection.cs
- ReferencedAssembly.cs
- _LocalDataStore.cs
- RowParagraph.cs
- GatewayDefinition.cs
- TimeZone.cs
- DispatcherObject.cs
- OdbcFactory.cs
- ValueOfAction.cs
- DmlSqlGenerator.cs
- ShapingEngine.cs
- MulticastDelegate.cs
- ProfileInfo.cs
- TemplateControlParser.cs
- ActivityContext.cs
- PropertiesTab.cs
- AbstractDataSvcMapFileLoader.cs
- Canvas.cs
- DataListItemEventArgs.cs
- LinkLabelLinkClickedEvent.cs
- Dump.cs
- SqlDataSource.cs
- ResourceAssociationTypeEnd.cs
- _StreamFramer.cs
- Boolean.cs
- ObjectStateEntryDbDataRecord.cs
- LinkLabelLinkClickedEvent.cs
- DataGridViewButtonColumn.cs
- MemoryMappedViewStream.cs
- FormatException.cs
- MemoryRecordBuffer.cs
- FillBehavior.cs
- NetworkInterface.cs
- PhoneCall.cs
- ClientBuildManager.cs
- CultureInfo.cs