|
/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Dynamic.Utils;
using System.Reflection;
#if SILVERLIGHT
using System.Core;
#endif
#if CLR2
namespace Microsoft.Scripting.Ast {
#else
namespace System.Linq.Expressions {
#endif
/// <summary>
/// Represents initializing the elements of a collection member of a newly created object.
/// </summary>
public sealed class MemberListBinding : MemberBinding {
ReadOnlyCollection<ElementInit> _initializers;
internal MemberListBinding(MemberInfo member, ReadOnlyCollection<ElementInit> initializers)
#pragma warning disable 618
: base(MemberBindingType.ListBinding, member) {
#pragma warning restore 618
_initializers = initializers;
}
/// <summary>
/// Gets the element initializers for initializing a collection member of a newly created object.
/// </summary>
public ReadOnlyCollection<ElementInit> Initializers {
get { return _initializers; }
}
/// <summary>
/// Creates a new expression that is like this one, but using the
/// supplied children. If all of the children are the same, it will
/// return this expression.
/// </summary>
/// <param name="initializers">The <see cref="Initializers" /> property of the result.</param>
/// <returns>This expression if no children changed, or an expression with the updated children.</returns>
public MemberListBinding Update(IEnumerable<ElementInit> initializers) {
if (initializers == Initializers) {
return this;
}
return Expression.ListBind(Member, initializers);
}
}
public partial class Expression {
///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> where the member is a field or property.</summary>
///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" /> and the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> properties set to the specified values.</returns>
///<param name="member">A <see cref="T:System.Reflection.MemberInfo" /> that represents a field or property to set the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property equal to.</param>
///<param name="initializers">An array of <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
///<exception cref="T:System.ArgumentNullException">
///<paramref name="member" /> is null. -or-One or more elements of <paramref name="initializers" /> is null.</exception>
///<exception cref="T:System.ArgumentException">
///<paramref name="member" /> does not represent a field or property.-or-The <see cref="P:System.Reflection.FieldInfo.FieldType" /> or <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the field or property that <paramref name="member" /> represents does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
public static MemberListBinding ListBind(MemberInfo member, params ElementInit[] initializers) {
ContractUtils.RequiresNotNull(member, "member");
ContractUtils.RequiresNotNull(initializers, "initializers");
return ListBind(member, (IEnumerable<ElementInit>)initializers);
}
///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> where the member is a field or property.</summary>
///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" /> and the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> properties set to the specified values.</returns>
///<param name="member">A <see cref="T:System.Reflection.MemberInfo" /> that represents a field or property to set the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property equal to.</param>
///<param name="initializers">An <see cref="T:System.Collections.Generic.IEnumerable`1" /> that contains <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
///<exception cref="T:System.ArgumentNullException">
///<paramref name="member" /> is null. -or-One or more elements of <paramref name="initializers" /> is null.</exception>
///<exception cref="T:System.ArgumentException">
///<paramref name="member" /> does not represent a field or property.-or-The <see cref="P:System.Reflection.FieldInfo.FieldType" /> or <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the field or property that <paramref name="member" /> represents does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
public static MemberListBinding ListBind(MemberInfo member, IEnumerable<ElementInit> initializers) {
ContractUtils.RequiresNotNull(member, "member");
ContractUtils.RequiresNotNull(initializers, "initializers");
Type memberType;
ValidateGettableFieldOrPropertyMember(member, out memberType);
var initList = initializers.ToReadOnly();
ValidateListInitArgs(memberType, initList);
return new MemberListBinding(member, initList);
}
///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> object based on a specified property accessor method.</summary>
///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" />, the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property set to the <see cref="T:System.Reflection.MemberInfo" /> that represents the property accessed in <paramref name="propertyAccessor" />, and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> populated with the elements of <paramref name="initializers" />.</returns>
///<param name="propertyAccessor">A <see cref="T:System.Reflection.MethodInfo" /> that represents a property accessor method.</param>
///<param name="initializers">An array of <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
///<exception cref="T:System.ArgumentNullException">
///<paramref name="propertyAccessor" /> is null. -or-One or more elements of <paramref name="initializers" /> is null.</exception>
///<exception cref="T:System.ArgumentException">
///<paramref name="propertyAccessor" /> does not represent a property accessor method.-or-The <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the property that the method represented by <paramref name="propertyAccessor" /> accesses does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
public static MemberListBinding ListBind(MethodInfo propertyAccessor, params ElementInit[] initializers) {
ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
ContractUtils.RequiresNotNull(initializers, "initializers");
return ListBind(propertyAccessor, (IEnumerable<ElementInit>)initializers);
}
///<summary>Creates a <see cref="T:System.Linq.Expressions.MemberListBinding" /> based on a specified property accessor method.</summary>
///<returns>A <see cref="T:System.Linq.Expressions.MemberListBinding" /> that has the <see cref="P:System.Linq.Expressions.MemberBinding.BindingType" /> property equal to <see cref="F:System.Linq.Expressions.MemberBindingType.ListBinding" />, the <see cref="P:System.Linq.Expressions.MemberBinding.Member" /> property set to the <see cref="T:System.Reflection.MemberInfo" /> that represents the property accessed in <paramref name="propertyAccessor" />, and <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> populated with the elements of <paramref name="initializers" />.</returns>
///<param name="propertyAccessor">A <see cref="T:System.Reflection.MethodInfo" /> that represents a property accessor method.</param>
///<param name="initializers">An <see cref="T:System.Collections.Generic.IEnumerable`1" /> that contains <see cref="T:System.Linq.Expressions.ElementInit" /> objects to use to populate the <see cref="P:System.Linq.Expressions.MemberListBinding.Initializers" /> collection.</param>
///<exception cref="T:System.ArgumentNullException">
///<paramref name="propertyAccessor" /> is null. -or-One or more elements of <paramref name="initializers" /> are null.</exception>
///<exception cref="T:System.ArgumentException">
///<paramref name="propertyAccessor" /> does not represent a property accessor method.-or-The <see cref="P:System.Reflection.PropertyInfo.PropertyType" /> of the property that the method represented by <paramref name="propertyAccessor" /> accesses does not implement <see cref="T:System.Collections.IEnumerable" />.</exception>
public static MemberListBinding ListBind(MethodInfo propertyAccessor, IEnumerable<ElementInit> initializers) {
ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
ContractUtils.RequiresNotNull(initializers, "initializers");
return ListBind(GetProperty(propertyAccessor), initializers);
}
private static void ValidateListInitArgs(Type listType, ReadOnlyCollection<ElementInit> initializers) {
if (!typeof(IEnumerable).IsAssignableFrom(listType)) {
throw Error.TypeNotIEnumerable(listType);
}
for (int i = 0, n = initializers.Count; i < n; i++) {
ElementInit element = initializers[i];
ContractUtils.RequiresNotNull(element, "initializers");
ValidateCallInstanceType(listType, element.AddMethod);
}
}
}
}
|