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210 lines
6.9 KiB
C#
210 lines
6.9 KiB
C#
using MediaBrowser.Common.Logging;
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using System;
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using System.IO;
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using System.Linq;
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using System.Xml;
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namespace MediaBrowser.Common.Serialization
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{
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/// <summary>
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/// Provides a wrapper around third party xml serialization.
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/// </summary>
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public class XmlSerializer
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{
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/// <summary>
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/// Serializes to writer.
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="obj">The obj.</param>
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/// <param name="writer">The writer.</param>
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public static void SerializeToWriter<T>(T obj, XmlTextWriter writer)
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{
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writer.Formatting = Formatting.Indented;
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var netSerializer = new System.Xml.Serialization.XmlSerializer(typeof(T));
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netSerializer.Serialize(writer, obj);
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}
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/// <summary>
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/// Serializes to writer.
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/// </summary>
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/// <param name="obj">The obj.</param>
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/// <param name="writer">The writer.</param>
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public static void SerializeToWriter(object obj, XmlTextWriter writer)
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{
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writer.Formatting = Formatting.Indented;
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var netSerializer = new System.Xml.Serialization.XmlSerializer(obj.GetType());
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netSerializer.Serialize(writer, obj);
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}
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/// <summary>
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/// Deserializes from stream.
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="stream">The stream.</param>
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/// <returns>``0.</returns>
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public static T DeserializeFromStream<T>(Stream stream)
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{
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using (var reader = new XmlTextReader(stream))
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{
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var netSerializer = new System.Xml.Serialization.XmlSerializer(typeof(T));
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return (T)netSerializer.Deserialize(reader);
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}
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}
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/// <summary>
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/// Deserializes from stream.
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/// </summary>
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/// <param name="type">The type.</param>
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/// <param name="stream">The stream.</param>
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/// <returns>System.Object.</returns>
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public static object DeserializeFromStream(Type type, Stream stream)
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{
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using (var reader = new XmlTextReader(stream))
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{
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var netSerializer = new System.Xml.Serialization.XmlSerializer(type);
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return netSerializer.Deserialize(reader);
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}
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}
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/// <summary>
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/// Serializes to stream.
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/// </summary>
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/// <param name="obj">The obj.</param>
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/// <param name="stream">The stream.</param>
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public static void SerializeToStream(object obj, Stream stream)
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{
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using (var writer = new XmlTextWriter(stream, null))
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{
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SerializeToWriter(obj, writer);
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}
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}
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/// <summary>
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/// Deserializes from file.
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="file">The file.</param>
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/// <returns>``0.</returns>
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public static T DeserializeFromFile<T>(string file)
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{
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using (var stream = File.OpenRead(file))
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{
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return DeserializeFromStream<T>(stream);
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}
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}
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/// <summary>
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/// Serializes to file.
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/// </summary>
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/// <param name="obj">The obj.</param>
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/// <param name="file">The file.</param>
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public static void SerializeToFile(object obj, string file)
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{
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using (var stream = new FileStream(file, FileMode.Create))
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{
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SerializeToStream(obj, stream);
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}
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}
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/// <summary>
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/// Deserializes from file.
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/// </summary>
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/// <param name="type">The type.</param>
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/// <param name="file">The file.</param>
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/// <returns>System.Object.</returns>
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public static object DeserializeFromFile(Type type, string file)
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{
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using (var stream = File.OpenRead(file))
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{
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return DeserializeFromStream(type, stream);
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}
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}
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/// <summary>
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/// Deserializes from bytes.
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/// </summary>
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/// <param name="type">The type.</param>
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/// <param name="buffer">The buffer.</param>
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/// <returns>System.Object.</returns>
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public static object DeserializeFromBytes(Type type, byte[] buffer)
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{
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using (var stream = new MemoryStream(buffer))
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{
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return DeserializeFromStream(type, stream);
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}
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}
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/// <summary>
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/// Serializes to bytes.
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/// </summary>
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/// <param name="obj">The obj.</param>
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/// <returns>System.Byte[][].</returns>
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public static byte[] SerializeToBytes(object obj)
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{
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using (var stream = new MemoryStream())
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{
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SerializeToStream(obj, stream);
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return stream.ToArray();
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}
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}
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/// <summary>
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/// Reads an xml configuration file from the file system
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/// It will immediately re-serialize and save if new serialization data is available due to property changes
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/// </summary>
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/// <param name="type">The type.</param>
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/// <param name="path">The path.</param>
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/// <returns>System.Object.</returns>
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public static object GetXmlConfiguration(Type type, string path)
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{
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Logger.LogInfo("Loading {0} at {1}", type.Name, path);
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object configuration;
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byte[] buffer = null;
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// Use try/catch to avoid the extra file system lookup using File.Exists
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try
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{
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buffer = File.ReadAllBytes(path);
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configuration = DeserializeFromBytes(type, buffer);
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}
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catch (FileNotFoundException)
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{
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configuration = Activator.CreateInstance(type);
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}
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// Take the object we just got and serialize it back to bytes
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var newBytes = SerializeToBytes(configuration);
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// If the file didn't exist before, or if something has changed, re-save
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if (buffer == null || !buffer.SequenceEqual(newBytes))
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{
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Logger.LogInfo("Saving {0} to {1}", type.Name, path);
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// Save it after load in case we got new items
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File.WriteAllBytes(path, newBytes);
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}
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return configuration;
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}
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/// <summary>
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/// Reads an xml configuration file from the file system
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/// It will immediately save the configuration after loading it, just
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/// in case there are new serializable properties
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="path">The path.</param>
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/// <returns>``0.</returns>
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public static T GetXmlConfiguration<T>(string path)
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where T : class
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{
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return GetXmlConfiguration(typeof(T), path) as T;
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}
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}
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}
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