#region Apache License
//
// Licensed to the Apache Software Foundation (ASF) under one or more 
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership. 
// The ASF licenses this file to you under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with 
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion

using System;
using System.Text;
using System.IO;

using log4net.Core;

namespace log4net.Layout.Pattern
{
	/// <summary>
	/// Pattern converter for the class name
	/// </summary>
	/// <remarks>
	/// <para>
	/// Outputs the <see cref="LocationInfo.ClassName"/> of the event.
	/// </para>
	/// </remarks>
	/// <author>Nicko Cadell</author>
	internal sealed class TypeNamePatternConverter : NamedPatternConverter 
	{
		/// <summary>
		/// Gets the fully qualified name of the class
		/// </summary>
		/// <param name="loggingEvent">the event being logged</param>
		/// <returns>The fully qualified type name for the caller location</returns>
		/// <remarks>
		/// <para>
		/// Returns the <see cref="LocationInfo.ClassName"/> of the <paramref name="loggingEvent"/>.
		/// </para>
		/// </remarks>
		override protected string GetFullyQualifiedName(LoggingEvent loggingEvent) 
		{
			if (loggingEvent == null)
			{
				return string.Empty;
			}
			
			if (loggingEvent.LocationInformation == null)
			{
				return string.Empty;
			}
			
			return loggingEvent.LocationInformation.ClassName;
		}
	}
}