/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, 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 Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
#if !SILVERLIGHT
#if !CLR2
using System.Linq.Expressions;
#else
using Microsoft.Scripting.Ast;
#endif
using System.Collections.Generic;
using System.Dynamic;
using AstUtilsMicrosoft.Scripting.Ast.Utils;
namespace Microsoft.Scripting.ComInterop{
internal class TypeLibMetaObject : DynamicMetaObject {
private readonly ComTypeLibDesc _lib;
internal TypeLibMetaObject(Expression expression, ComTypeLibDesc lib)
: base(expression, BindingRestrictions.Empty, lib) {
_lib = lib;
}
private DynamicMetaObject TryBindGetMember(string name) {
if (_lib.HasMember(name)) {
BindingRestrictions restrictions =
BindingRestrictions.GetTypeRestriction(
Expression, typeof(ComTypeLibDesc)
).Merge(
BindingRestrictions.GetExpressionRestriction(
Expression.Equal(
Expression.Property(
AstUtils.Convert(
Expression, typeof(ComTypeLibDesc)
),
typeof(ComTypeLibDesc).GetProperty("Guid")
),
AstUtils.Constant(_lib.Guid)
)
)
);
return new DynamicMetaObject(
AstUtils.Constant(
((ComTypeLibDesc)Value).GetTypeLibObjectDesc(name)
),
restrictions
);
}
return null;
}
public override DynamicMetaObject BindGetMember(GetMemberBinder binder) {
return TryBindGetMember(binder.Name) ?? base.BindGetMember(binder);
}
public override DynamicMetaObject BindInvokeMember(InvokeMemberBinder binder, DynamicMetaObject[] args) {
var result = TryBindGetMember(binder.Name);
if (result != null) {
return binder.FallbackInvoke(result, args, null);
}
return base.BindInvokeMember(binder, args);
}
public override IEnumerable<string> GetDynamicMemberNames() {
return _lib.GetMemberNames();
}
}
}
#endif
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