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#region MIT license
//
// MIT license
//
// Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#endregion
using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Reflection;
using DbLinq.Data.Linq.Sugar.Expressions;
namespace DbLinq.Data.Linq.Sugar.Expressions
{
/// <summary>
/// A MetaTablePiece contains aliases for tables (used on joins)
/// </summary>
#if !MONO_STRICT
public
#endif
class MetaTableExpression : MutableExpression
{
public const ExpressionType ExpressionType = (ExpressionType)CustomExpressionType.MetaTable;
protected IDictionary<MemberInfo, MutableExpression> Aliases;
public MutableExpression GetTableExpression(MemberInfo memberInfo)
{
MutableExpression tablePiece;
Aliases.TryGetValue(memberInfo, out tablePiece);
return tablePiece;
}
public MetaTableExpression(IDictionary<MemberInfo, MutableExpression> aliases, Type metaTableType)
: base(ExpressionType, metaTableType)
{
/* This check was disabled just becouse should be implied by the usage
foreach (var alias in aliases)
{
if ( !(alias.Value is TableExpression) && !(alias.Value is MetaTableExpression))
{
throw Error.BadArgument("Invalid MetaTable element type: {0}", alias.Value.Type);
}
}
* */
Aliases = aliases;
}
}
}
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