#region license
//
// (C) db4objects Inc. http://www.db4o.com
//
// 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 Cecil.FlowAnalysis.ActionFlow;
using Cecil.FlowAnalysis.Impl.ActionFlow;
using Mono.Cecil.Cil;

namespace Cecil.FlowAnalysis.Impl.ActionFlow
{
	internal class BranchActionBlock : AbstractActionBlock, IBranchActionBlock
	{
		IActionBlock _target;

		public BranchActionBlock(IInstruction sourceInstruction) : base(sourceInstruction)
		{	
		}

		public void SetTarget(IActionBlock target)
		{
			if (null == target) throw new ArgumentNullException("target");
			_target = target;
			AddAsPredecessorOf(target);
		}

		public IActionBlock Target
		{
			get
			{
				return _target;
			}
		}

		override public ActionType ActionType
		{
			get
			{
				return ActionType.Branch;
			}
		}

		public override IActionBlock[] Successors
		{
			get
			{
				return new IActionBlock[] { _target };
			}
		}

		public override void ReplaceSuccessor(IActionBlock existing, IActionBlock newBlock)
		{
			if (_target != existing) throw new ArgumentException("existing");
			_target = newBlock;
		}
	}
}