Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Client / System / Data / Services / Client / ALinq / ResourceSetExpression.cs / 1305376 / ResourceSetExpression.cs
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// Respresents a resource set in resource bound expression tree.
//
//
// @owner [....]
//---------------------------------------------------------------------
namespace System.Data.Services.Client
{
#region Namespaces.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
#endregion Namespaces.
/// ResourceSet Expression
[DebuggerDisplay("ResourceSetExpression {Source}.{MemberExpression}")]
internal class ResourceSetExpression : ResourceExpression
{
#region Private fields.
///
/// The (static) type of the resources in this resource set.
/// The resource type can differ from this.Type if this expression represents a transparent scope.
/// For example, in TransparentScope{Category, Product}, the true element type is Product.
///
private readonly Type resourceType;
/// property member name
private readonly Expression member;
/// key predicate
private Dictionary keyFilter;
/// sequence query options
private List sequenceQueryOptions;
/// enclosing transparent scope
private TransparentAccessors transparentScope;
#endregion Private fields.
///
/// Creates a ResourceSet expression
///
/// the return type of the expression
/// the source expression
/// property member name
/// the element type of the resource set
/// expand paths for resource set
/// count query option for the resource set
/// custom query options for resourcse set
internal ResourceSetExpression(Type type, Expression source, Expression memberExpression, Type resourceType, List expandPaths, CountOption countOption, Dictionary customQueryOptions, ProjectionQueryOptionExpression projection)
: base(source, source != null ? (ExpressionType)ResourceExpressionType.ResourceNavigationProperty : (ExpressionType)ResourceExpressionType.RootResourceSet, type, expandPaths, countOption, customQueryOptions, projection)
{
Debug.Assert(type != null, "type != null");
Debug.Assert(memberExpression != null, "memberExpression != null");
Debug.Assert(resourceType != null, "resourceType != null");
Debug.Assert(
(source == null && memberExpression is ConstantExpression) ||
(source != null && memberExpression is MemberExpression),
"source is null with constant entity set name, or not null with member expression");
this.member = memberExpression;
this.resourceType = resourceType;
this.sequenceQueryOptions = new List();
}
#region Internal properties.
///
/// Member for ResourceSet
///
internal Expression MemberExpression
{
get { return this.member; }
}
///
/// Type of resources contained in this ResourceSet - it's element type.
///
internal override Type ResourceType
{
get { return this.resourceType; }
}
///
/// Is this ResourceSet enclosed in an anonymously-typed transparent scope produced by a SelectMany operation?
/// Applies to navigation ResourceSets.
///
internal bool HasTransparentScope
{
get { return this.transparentScope != null; }
}
///
/// The property accesses required to reference this ResourceSet and its source ResourceSet if a transparent scope is present.
/// May be null. Use
internal TransparentAccessors TransparentScope
{
get { return this.transparentScope; }
set { this.transparentScope = value; }
}
///
/// Has a key predicate restriction been applied to this ResourceSet?
///
internal bool HasKeyPredicate
{
get { return this.keyFilter != null; }
}
///
/// The property name/required value pairs that comprise the key predicate (if any) applied to this ResourceSet.
/// May be null. Use
internal Dictionary KeyPredicate
{
get { return this.keyFilter; }
set { this.keyFilter = value; }
}
///
/// A resource set produces at most 1 result if constrained by a key predicate
///
internal override bool IsSingleton
{
get { return this.HasKeyPredicate; }
}
///
/// Have sequence query options (filter, orderby, skip, take), expand paths, projection
/// or custom query options been applied to this resource set?
///
internal override bool HasQueryOptions
{
get
{
return this.sequenceQueryOptions.Count > 0 ||
this.ExpandPaths.Count > 0 ||
this.CountOption == CountOption.InlineAll || // value only count is not an option
this.CustomQueryOptions.Count > 0 ||
this.Projection != null;
}
}
///
/// Filter query option for ResourceSet
///
internal FilterQueryOptionExpression Filter
{
get
{
return this.sequenceQueryOptions.OfType().SingleOrDefault();
}
}
///
/// OrderBy query option for ResourceSet
///
internal OrderByQueryOptionExpression OrderBy
{
get { return this.sequenceQueryOptions.OfType().SingleOrDefault(); }
}
///
/// Skip query option for ResourceSet
///
internal SkipQueryOptionExpression Skip
{
get { return this.sequenceQueryOptions.OfType().SingleOrDefault(); }
}
///
/// Take query option for ResourceSet
///
internal TakeQueryOptionExpression Take
{
get { return this.sequenceQueryOptions.OfType().SingleOrDefault(); }
}
///
/// Gets sequence query options for ResourcSet
///
internal IEnumerable SequenceQueryOptions
{
get { return this.sequenceQueryOptions.ToList(); }
}
/// Whether there are any query options for the sequence.
internal bool HasSequenceQueryOptions
{
get { return this.sequenceQueryOptions.Count > 0; }
}
#endregion Internal properties.
#region Internal methods.
///
/// Cast ResourceSetExpression to new type
///
internal override ResourceExpression CreateCloneWithNewType(Type type)
{
ResourceSetExpression rse = new ResourceSetExpression(
type,
this.source,
this.MemberExpression,
TypeSystem.GetElementType(type),
this.ExpandPaths.ToList(),
this.CountOption,
this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value),
this.Projection);
rse.keyFilter = this.keyFilter;
rse.sequenceQueryOptions = this.sequenceQueryOptions;
rse.transparentScope = this.transparentScope;
return rse;
}
///
/// Add query option to resource expression
///
internal void AddSequenceQueryOption(QueryOptionExpression qoe)
{
Debug.Assert(qoe != null, "qoe != null");
QueryOptionExpression old = this.sequenceQueryOptions.Where(o => o.GetType() == qoe.GetType()).FirstOrDefault();
if (old != null)
{
qoe = qoe.ComposeMultipleSpecification(old);
this.sequenceQueryOptions.Remove(old);
}
this.sequenceQueryOptions.Add(qoe);
}
///
/// Instructs this resource set expression to use the input reference expression from
/// The resource set expression from which to take the input reference.
/// Used exclusively by
internal void OverrideInputReference(ResourceSetExpression newInput)
{
Debug.Assert(newInput != null, "Original resource set cannot be null");
Debug.Assert(this.inputRef == null, "OverrideInputReference cannot be called if the target has already been referenced");
InputReferenceExpression inputRef = newInput.inputRef;
if (inputRef != null)
{
this.inputRef = inputRef;
inputRef.OverrideTarget(this);
}
}
#endregion Internal methods.
///
/// Represents the property accesses required to access both
/// this resource set and its source resource/set (for navigations).
///
/// These accesses are required to reference resource sets enclosed
/// in transparent scopes introduced by use of SelectMany.
///
///
/// For example, this query:
/// from c in Custs where c.id == 1
/// from o in c.Orders from od in o.OrderDetails select od
///
/// Translates to:
/// c.Where(c => c.id == 1)
/// .SelectMany(c => o, (c, o) => new $(c=c, o=o))
/// .SelectMany($ => $.o, ($, od) => od)
///
/// PatternRules.MatchPropertyProjectionSet identifies Orders as the target of the collector.
/// PatternRules.MatchTransparentScopeSelector identifies the introduction of a transparent identifer.
///
/// A transparent accessor is associated with Orders, with 'c' being the source accesor,
/// and 'o' being the (introduced) accessor.
///
[DebuggerDisplay("{ToString()}")]
internal class TransparentAccessors
{
#region Internal fields.
///
/// The property reference that must be applied to reference this resource set
///
internal readonly string Accessor;
///
/// The property reference that must be applied to reference the source resource set.
/// Note that this set's Accessor is NOT required to access the source set, but the
/// source set MAY impose it's own Transparent Accessors
///
internal readonly Dictionary SourceAccessors;
#endregion Internal fields.
///
/// Constructs a new transparent scope with the specified set and source set accessors
///
/// The name of the property required to access the resource set
/// The names of the property required to access the resource set's sources.
internal TransparentAccessors(string acc, Dictionary sourceAccesors)
{
Debug.Assert(!string.IsNullOrEmpty(acc), "Set accessor cannot be null or empty");
Debug.Assert(sourceAccesors != null, "sourceAccesors != null");
this.Accessor = acc;
this.SourceAccessors = sourceAccesors;
}
/// Provides a string representation of this accessor.
/// The text represntation of this accessor.
public override string ToString()
{
string result = "SourceAccessors=[" + string.Join(",", this.SourceAccessors.Keys.ToArray());
result += "] ->* Accessor=" + this.Accessor;
return result;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// Respresents a resource set in resource bound expression tree.
//
//
// @owner [....]
//---------------------------------------------------------------------
namespace System.Data.Services.Client
{
#region Namespaces.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
#endregion Namespaces.
/// ResourceSet Expression
[DebuggerDisplay("ResourceSetExpression {Source}.{MemberExpression}")]
internal class ResourceSetExpression : ResourceExpression
{
#region Private fields.
///
/// The (static) type of the resources in this resource set.
/// The resource type can differ from this.Type if this expression represents a transparent scope.
/// For example, in TransparentScope{Category, Product}, the true element type is Product.
///
private readonly Type resourceType;
/// property member name
private readonly Expression member;
/// key predicate
private Dictionary keyFilter;
/// sequence query options
private List sequenceQueryOptions;
/// enclosing transparent scope
private TransparentAccessors transparentScope;
#endregion Private fields.
///
/// Creates a ResourceSet expression
///
/// the return type of the expression
/// the source expression
/// property member name
/// the element type of the resource set
/// expand paths for resource set
/// count query option for the resource set
/// custom query options for resourcse set
internal ResourceSetExpression(Type type, Expression source, Expression memberExpression, Type resourceType, List expandPaths, CountOption countOption, Dictionary customQueryOptions, ProjectionQueryOptionExpression projection)
: base(source, source != null ? (ExpressionType)ResourceExpressionType.ResourceNavigationProperty : (ExpressionType)ResourceExpressionType.RootResourceSet, type, expandPaths, countOption, customQueryOptions, projection)
{
Debug.Assert(type != null, "type != null");
Debug.Assert(memberExpression != null, "memberExpression != null");
Debug.Assert(resourceType != null, "resourceType != null");
Debug.Assert(
(source == null && memberExpression is ConstantExpression) ||
(source != null && memberExpression is MemberExpression),
"source is null with constant entity set name, or not null with member expression");
this.member = memberExpression;
this.resourceType = resourceType;
this.sequenceQueryOptions = new List();
}
#region Internal properties.
///
/// Member for ResourceSet
///
internal Expression MemberExpression
{
get { return this.member; }
}
///
/// Type of resources contained in this ResourceSet - it's element type.
///
internal override Type ResourceType
{
get { return this.resourceType; }
}
///
/// Is this ResourceSet enclosed in an anonymously-typed transparent scope produced by a SelectMany operation?
/// Applies to navigation ResourceSets.
///
internal bool HasTransparentScope
{
get { return this.transparentScope != null; }
}
///
/// The property accesses required to reference this ResourceSet and its source ResourceSet if a transparent scope is present.
/// May be null. Use
internal TransparentAccessors TransparentScope
{
get { return this.transparentScope; }
set { this.transparentScope = value; }
}
///
/// Has a key predicate restriction been applied to this ResourceSet?
///
internal bool HasKeyPredicate
{
get { return this.keyFilter != null; }
}
///
/// The property name/required value pairs that comprise the key predicate (if any) applied to this ResourceSet.
/// May be null. Use
internal Dictionary KeyPredicate
{
get { return this.keyFilter; }
set { this.keyFilter = value; }
}
///
/// A resource set produces at most 1 result if constrained by a key predicate
///
internal override bool IsSingleton
{
get { return this.HasKeyPredicate; }
}
///
/// Have sequence query options (filter, orderby, skip, take), expand paths, projection
/// or custom query options been applied to this resource set?
///
internal override bool HasQueryOptions
{
get
{
return this.sequenceQueryOptions.Count > 0 ||
this.ExpandPaths.Count > 0 ||
this.CountOption == CountOption.InlineAll || // value only count is not an option
this.CustomQueryOptions.Count > 0 ||
this.Projection != null;
}
}
///
/// Filter query option for ResourceSet
///
internal FilterQueryOptionExpression Filter
{
get
{
return this.sequenceQueryOptions.OfType().SingleOrDefault();
}
}
///
/// OrderBy query option for ResourceSet
///
internal OrderByQueryOptionExpression OrderBy
{
get { return this.sequenceQueryOptions.OfType().SingleOrDefault(); }
}
///
/// Skip query option for ResourceSet
///
internal SkipQueryOptionExpression Skip
{
get { return this.sequenceQueryOptions.OfType().SingleOrDefault(); }
}
///
/// Take query option for ResourceSet
///
internal TakeQueryOptionExpression Take
{
get { return this.sequenceQueryOptions.OfType().SingleOrDefault(); }
}
///
/// Gets sequence query options for ResourcSet
///
internal IEnumerable SequenceQueryOptions
{
get { return this.sequenceQueryOptions.ToList(); }
}
/// Whether there are any query options for the sequence.
internal bool HasSequenceQueryOptions
{
get { return this.sequenceQueryOptions.Count > 0; }
}
#endregion Internal properties.
#region Internal methods.
///
/// Cast ResourceSetExpression to new type
///
internal override ResourceExpression CreateCloneWithNewType(Type type)
{
ResourceSetExpression rse = new ResourceSetExpression(
type,
this.source,
this.MemberExpression,
TypeSystem.GetElementType(type),
this.ExpandPaths.ToList(),
this.CountOption,
this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value),
this.Projection);
rse.keyFilter = this.keyFilter;
rse.sequenceQueryOptions = this.sequenceQueryOptions;
rse.transparentScope = this.transparentScope;
return rse;
}
///
/// Add query option to resource expression
///
internal void AddSequenceQueryOption(QueryOptionExpression qoe)
{
Debug.Assert(qoe != null, "qoe != null");
QueryOptionExpression old = this.sequenceQueryOptions.Where(o => o.GetType() == qoe.GetType()).FirstOrDefault();
if (old != null)
{
qoe = qoe.ComposeMultipleSpecification(old);
this.sequenceQueryOptions.Remove(old);
}
this.sequenceQueryOptions.Add(qoe);
}
///
/// Instructs this resource set expression to use the input reference expression from
/// The resource set expression from which to take the input reference.
/// Used exclusively by
internal void OverrideInputReference(ResourceSetExpression newInput)
{
Debug.Assert(newInput != null, "Original resource set cannot be null");
Debug.Assert(this.inputRef == null, "OverrideInputReference cannot be called if the target has already been referenced");
InputReferenceExpression inputRef = newInput.inputRef;
if (inputRef != null)
{
this.inputRef = inputRef;
inputRef.OverrideTarget(this);
}
}
#endregion Internal methods.
///
/// Represents the property accesses required to access both
/// this resource set and its source resource/set (for navigations).
///
/// These accesses are required to reference resource sets enclosed
/// in transparent scopes introduced by use of SelectMany.
///
///
/// For example, this query:
/// from c in Custs where c.id == 1
/// from o in c.Orders from od in o.OrderDetails select od
///
/// Translates to:
/// c.Where(c => c.id == 1)
/// .SelectMany(c => o, (c, o) => new $(c=c, o=o))
/// .SelectMany($ => $.o, ($, od) => od)
///
/// PatternRules.MatchPropertyProjectionSet identifies Orders as the target of the collector.
/// PatternRules.MatchTransparentScopeSelector identifies the introduction of a transparent identifer.
///
/// A transparent accessor is associated with Orders, with 'c' being the source accesor,
/// and 'o' being the (introduced) accessor.
///
[DebuggerDisplay("{ToString()}")]
internal class TransparentAccessors
{
#region Internal fields.
///
/// The property reference that must be applied to reference this resource set
///
internal readonly string Accessor;
///
/// The property reference that must be applied to reference the source resource set.
/// Note that this set's Accessor is NOT required to access the source set, but the
/// source set MAY impose it's own Transparent Accessors
///
internal readonly Dictionary SourceAccessors;
#endregion Internal fields.
///
/// Constructs a new transparent scope with the specified set and source set accessors
///
/// The name of the property required to access the resource set
/// The names of the property required to access the resource set's sources.
internal TransparentAccessors(string acc, Dictionary sourceAccesors)
{
Debug.Assert(!string.IsNullOrEmpty(acc), "Set accessor cannot be null or empty");
Debug.Assert(sourceAccesors != null, "sourceAccesors != null");
this.Accessor = acc;
this.SourceAccessors = sourceAccesors;
}
/// Provides a string representation of this accessor.
/// The text represntation of this accessor.
public override string ToString()
{
string result = "SourceAccessors=[" + string.Join(",", this.SourceAccessors.Keys.ToArray());
result += "] ->* Accessor=" + this.Accessor;
return result;
}
}
}
}
// 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
- ColumnWidthChangingEvent.cs
- NamedObject.cs
- CompiledRegexRunnerFactory.cs
- IPHostEntry.cs
- ZipIOExtraFieldElement.cs
- SchemaManager.cs
- RegexEditorDialog.cs
- WmiEventSink.cs
- PositiveTimeSpanValidatorAttribute.cs
- TdsParser.cs
- EntityDesignerUtils.cs
- SqlTriggerContext.cs
- BoolExpressionVisitors.cs
- WhitespaceRule.cs
- XmlQualifiedNameTest.cs
- HtmlInputCheckBox.cs
- CancellationTokenRegistration.cs
- SerialPinChanges.cs
- HttpCookie.cs
- TextTreeUndo.cs
- Assert.cs
- HttpRuntime.cs
- OutputCacheModule.cs
- Compensation.cs
- ContentControl.cs
- TypeToken.cs
- EventData.cs
- GridViewCellAutomationPeer.cs
- Assembly.cs
- ViewGenerator.cs
- OpenFileDialog.cs
- HtmlWindow.cs
- ControlParameter.cs
- XPathNavigator.cs
- RegionInfo.cs
- ResourceReferenceExpressionConverter.cs
- ExtendedProperty.cs
- HashCodeCombiner.cs
- OperationAbortedException.cs
- PassportAuthenticationModule.cs
- Bits.cs
- ConsoleKeyInfo.cs
- SignatureDescription.cs
- Enlistment.cs
- EventProxy.cs
- DesignerWithHeader.cs
- MexHttpsBindingElement.cs
- XmlILConstructAnalyzer.cs
- SafeThreadHandle.cs
- Renderer.cs
- AsymmetricKeyExchangeFormatter.cs
- ForceCopyBuildProvider.cs
- NotImplementedException.cs
- ContextMenu.cs
- UnhandledExceptionEventArgs.cs
- CaseStatementProjectedSlot.cs
- NavigationProperty.cs
- DirtyTextRange.cs
- ReadOnlyNameValueCollection.cs
- ManagementObject.cs
- ContainerSelectorBehavior.cs
- DesignTimeType.cs
- ToolBar.cs
- IResourceProvider.cs
- ExpressionConverter.cs
- HierarchicalDataBoundControlAdapter.cs
- TextBounds.cs
- SafeFindHandle.cs
- TemplateParser.cs
- ConsoleKeyInfo.cs
- CodeLinePragma.cs
- ColorContext.cs
- StandardRuntimeEnumValidator.cs
- Events.cs
- ToolStripDesigner.cs
- AuthenticateEventArgs.cs
- RestClientProxyHandler.cs
- DbReferenceCollection.cs
- CustomExpressionEventArgs.cs
- CommandPlan.cs
- CollectionViewSource.cs
- ThrowHelper.cs
- DropSourceBehavior.cs
- designeractionlistschangedeventargs.cs
- HashMembershipCondition.cs
- Substitution.cs
- TextServicesPropertyRanges.cs
- ActiveDocumentEvent.cs
- SocketException.cs
- SmtpFailedRecipientsException.cs
- TextEditorCopyPaste.cs
- StringArrayConverter.cs
- GridViewColumnHeaderAutomationPeer.cs
- ObjectViewListener.cs
- ServiceDefaults.cs
- Events.cs
- ProfileEventArgs.cs
- HttpStreamFormatter.cs
- OdbcInfoMessageEvent.cs
- CatalogZoneBase.cs