// 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
//
// Authors:
//		Antonello Provenzano  <antonello@deveel.com>
//		Federico Di Gregorio  <fog@initd.org>
//

using System.Reflection;
using System.Text;

namespace System.Linq.Expressions
{
	public sealed class UnaryExpression : Expression
	{
		#region .ctor
		internal UnaryExpression(ExpressionType nt, Expression operand, MethodInfo method, Type type)
			: base(nt, type)
		{
			this.operand = operand;
			this.method = method;
		}

		internal UnaryExpression(ExpressionType nt, Expression operand, Type type)
			: this(nt, operand, null, type)
		{
		}
		#endregion

		#region Fields
		private MethodInfo method;
		private Expression operand;
		#endregion

		#region Properties
		[MonoTODO]
		public bool IsLifted {
			get { return false; }
		}

		[MonoTODO]
		public bool IsLiftedToNull {
			get { return false; }
		}

		public MethodInfo Method {
			get { return method; }
		}

		public Expression Operand {
			get { return operand; }
		}
		#endregion

		#region Internal Methods
		internal override void BuildString(StringBuilder builder)
		{
			switch (NodeType)
			{
			case ExpressionType.ArrayLength:
				builder.Append ("ArrayLength(");
				operand.BuildString (builder);
				builder.Append (")");
				break;

			case ExpressionType.Quote:
				operand.BuildString (builder);
				break;

			case ExpressionType.TypeAs:
				builder.Append ("(");
				operand.BuildString (builder);
				builder.Append (" As ").Append (Type.Name);
				builder.Append (")");
				break;

			}
		 }
		#endregion
	}
}