#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 System.IO;
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using System.Collections;
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using log4net.Core;
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using log4net.Util;
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using log4net.Repository;
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namespace log4net.Util.PatternStringConverters
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{
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/// <summary>
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/// Property pattern converter
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/// </summary>
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/// <remarks>
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/// <para>
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/// This pattern converter reads the thread and global properties.
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/// The thread properties take priority over global properties.
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/// See <see cref="ThreadContext.Properties"/> for details of the
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/// thread properties. See <see cref="GlobalContext.Properties"/> for
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/// details of the global properties.
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/// </para>
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/// <para>
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/// If the <see cref="PatternConverter.Option"/> is specified then that will be used to
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/// lookup a single property. If no <see cref="PatternConverter.Option"/> is specified
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/// then all properties will be dumped as a list of key value pairs.
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/// </para>
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/// </remarks>
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/// <author>Nicko Cadell</author>
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internal sealed class PropertyPatternConverter : PatternConverter
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{
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/// <summary>
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/// Write the property value to the output
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/// </summary>
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/// <param name="writer"><see cref="TextWriter" /> that will receive the formatted result.</param>
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/// <param name="state">null, state is not set</param>
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/// <remarks>
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/// <para>
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/// Writes out the value of a named property. The property name
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/// should be set in the <see cref="log4net.Util.PatternConverter.Option"/>
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/// property.
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/// </para>
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/// <para>
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/// If the <see cref="log4net.Util.PatternConverter.Option"/> is set to <c>null</c>
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/// then all the properties are written as key value pairs.
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/// </para>
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/// </remarks>
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override protected void Convert(TextWriter writer, object state)
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{
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CompositeProperties compositeProperties = new CompositeProperties();
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#if !NETCF
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PropertiesDictionary logicalThreadProperties = LogicalThreadContext.Properties.GetProperties(false);
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if (logicalThreadProperties != null)
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{
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compositeProperties.Add(logicalThreadProperties);
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}
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#endif
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PropertiesDictionary threadProperties = ThreadContext.Properties.GetProperties(false);
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if (threadProperties != null)
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{
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compositeProperties.Add(threadProperties);
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}
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// TODO: Add Repository Properties
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compositeProperties.Add(GlobalContext.Properties.GetReadOnlyProperties());
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if (Option != null)
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{
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// Write the value for the specified key
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WriteObject(writer, null, compositeProperties[Option]);
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}
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else
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{
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// Write all the key value pairs
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WriteDictionary(writer, null, compositeProperties.Flatten());
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}
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}
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}
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}
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