#region Apache License
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//
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// Licensed to the Apache Software Foundation (ASF) under one or more
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// contributor license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership.
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// The ASF licenses this file to you under the Apache License, Version 2.0
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// (the "License"); you may not use this file except in compliance with
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// the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#endregion
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using System;
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using System.Text;
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using log4net.Core;
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using log4net.Util;
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namespace log4net.Layout
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{
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/// <summary>
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/// Extract the value of a property from the <see cref="LoggingEvent"/>
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/// </summary>
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/// <remarks>
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/// <para>
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/// Extract the value of a property from the <see cref="LoggingEvent"/>
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/// </para>
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/// </remarks>
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/// <author>Nicko Cadell</author>
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public class RawPropertyLayout : IRawLayout
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{
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#region Constructors
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/// <summary>
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/// Constructs a RawPropertyLayout
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/// </summary>
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public RawPropertyLayout()
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{
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}
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#endregion
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private string m_key;
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/// <summary>
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/// The name of the value to lookup in the LoggingEvent Properties collection.
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/// </summary>
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/// <value>
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/// Value to lookup in the LoggingEvent Properties collection
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/// </value>
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/// <remarks>
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/// <para>
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/// String name of the property to lookup in the <see cref="LoggingEvent"/>.
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/// </para>
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/// </remarks>
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public string Key
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{
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get { return m_key; }
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set { m_key = value; }
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}
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#region Implementation of IRawLayout
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/// <summary>
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/// Lookup the property for <see cref="Key"/>
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/// </summary>
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/// <param name="loggingEvent">The event to format</param>
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/// <returns>returns property value</returns>
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/// <remarks>
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/// <para>
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/// Looks up and returns the object value of the property
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/// named <see cref="Key"/>. If there is no property defined
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/// with than name then <c>null</c> will be returned.
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/// </para>
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/// </remarks>
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public virtual object Format(LoggingEvent loggingEvent)
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{
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return loggingEvent.LookupProperty(m_key);
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}
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#endregion
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}
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}
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