Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataWeb / Client / System / Data / Services / Client / ALinq / ResourceSetExpression.cs / 1 / ResourceSetExpression.cs
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// Respresents a resource set in resource bound expression tree.
//
//
// @owner [....]
//---------------------------------------------------------------------
namespace System.Data.Services.Client
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
/// ResourceSet Expression
[DebuggerDisplay("ResourceSetExpression {Source}.{MemberExpression}")]
internal class ResourceSetExpression : ResourceExpression
{
///
/// 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;
/// source expression
private readonly Expression source;
/// property member name
private readonly Expression member;
/// key predicate
private Dictionary keyFilter;
/// sequence query options
private List sequenceQueryOptions;
/// Is Leaf Resource
private bool leafResource;
/// enclosing transparent scope
private TransparentAccessors transparentScope;
///
/// 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
/// custom query options for resourcse set
internal ResourceSetExpression(Type type, Expression source, Expression memberExpression, Type resourceType, List expandPaths, Dictionary customQueryOptions)
: base(source != null ? (ExpressionType)ResourceExpressionType.ResourceNavigationProperty : (ExpressionType)ResourceExpressionType.RootResourceSet, type, expandPaths, customQueryOptions)
{
this.source = source;
this.member = memberExpression;
this.resourceType = resourceType;
this.sequenceQueryOptions = new List();
}
///
/// Member for ResourceSet
///
internal Expression MemberExpression
{
get { return this.member; }
}
///
/// source
///
internal Expression Source
{
get { return this.source; }
}
///
/// 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,
/// 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.CustomQueryOptions.Count > 0;
}
}
///
/// 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(); }
}
internal bool HasSequenceQueryOptions
{
get { return this.SequenceQueryOptions.Count() > 0; }
}
///
/// Is ResourcSet a leaf resource?
///
internal bool IsLeafResource
{
get { return this.leafResource; }
set { this.leafResource = value; }
}
///
/// Cast ResourceSetExpression to new type
///
internal override ResourceExpression Cast(Type type)
{
ResourceSetExpression rse = new ResourceSetExpression(type, this.source, this.MemberExpression, TypeSystem.GetElementType(type),
this.ExpandPaths.ToList(), this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value));
rse.keyFilter = this.keyFilter;
rse.sequenceQueryOptions = this.sequenceQueryOptions;
rse.leafResource = this.leafResource;
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);
}
}
///
/// Represents the property accesses required to access both this resource set and it's source
/// resource/set (for navigations). This accesses are required to reference resource sets enclosed
/// in transparent scopes introduced by use of SelectMany.
///
[DebuggerDisplay("Accessor={Accessor}, SourceAccessor={SourceAccessor}")]
internal class TransparentAccessors
{
///
/// 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 string SourceAccessor;
///
/// 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 name of the property required to access the resource set's source
internal TransparentAccessors(string acc, string sourceAcc)
{
Debug.Assert(!string.IsNullOrEmpty(acc), "Set accessor cannot be null or empty");
Debug.Assert(!string.IsNullOrEmpty(sourceAcc), "Source accessor cannot be null or empty");
this.Accessor = acc;
this.SourceAccessor = sourceAcc;
}
}
}
}
// 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
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
/// ResourceSet Expression
[DebuggerDisplay("ResourceSetExpression {Source}.{MemberExpression}")]
internal class ResourceSetExpression : ResourceExpression
{
///
/// 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;
/// source expression
private readonly Expression source;
/// property member name
private readonly Expression member;
/// key predicate
private Dictionary keyFilter;
/// sequence query options
private List sequenceQueryOptions;
/// Is Leaf Resource
private bool leafResource;
/// enclosing transparent scope
private TransparentAccessors transparentScope;
///
/// 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
/// custom query options for resourcse set
internal ResourceSetExpression(Type type, Expression source, Expression memberExpression, Type resourceType, List expandPaths, Dictionary customQueryOptions)
: base(source != null ? (ExpressionType)ResourceExpressionType.ResourceNavigationProperty : (ExpressionType)ResourceExpressionType.RootResourceSet, type, expandPaths, customQueryOptions)
{
this.source = source;
this.member = memberExpression;
this.resourceType = resourceType;
this.sequenceQueryOptions = new List();
}
///
/// Member for ResourceSet
///
internal Expression MemberExpression
{
get { return this.member; }
}
///
/// source
///
internal Expression Source
{
get { return this.source; }
}
///
/// 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,
/// 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.CustomQueryOptions.Count > 0;
}
}
///
/// 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(); }
}
internal bool HasSequenceQueryOptions
{
get { return this.SequenceQueryOptions.Count() > 0; }
}
///
/// Is ResourcSet a leaf resource?
///
internal bool IsLeafResource
{
get { return this.leafResource; }
set { this.leafResource = value; }
}
///
/// Cast ResourceSetExpression to new type
///
internal override ResourceExpression Cast(Type type)
{
ResourceSetExpression rse = new ResourceSetExpression(type, this.source, this.MemberExpression, TypeSystem.GetElementType(type),
this.ExpandPaths.ToList(), this.CustomQueryOptions.ToDictionary(kvp => kvp.Key, kvp => kvp.Value));
rse.keyFilter = this.keyFilter;
rse.sequenceQueryOptions = this.sequenceQueryOptions;
rse.leafResource = this.leafResource;
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);
}
}
///
/// Represents the property accesses required to access both this resource set and it's source
/// resource/set (for navigations). This accesses are required to reference resource sets enclosed
/// in transparent scopes introduced by use of SelectMany.
///
[DebuggerDisplay("Accessor={Accessor}, SourceAccessor={SourceAccessor}")]
internal class TransparentAccessors
{
///
/// 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 string SourceAccessor;
///
/// 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 name of the property required to access the resource set's source
internal TransparentAccessors(string acc, string sourceAcc)
{
Debug.Assert(!string.IsNullOrEmpty(acc), "Set accessor cannot be null or empty");
Debug.Assert(!string.IsNullOrEmpty(sourceAcc), "Source accessor cannot be null or empty");
this.Accessor = acc;
this.SourceAccessor = sourceAcc;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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