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using System;
using System.Text;
using System.IO;
using System.Xml;
using Google.ProtocolBuffers.Serialization;
using Google.ProtocolBuffers.Serialization.Http;
namespace Google.ProtocolBuffers
{
/// <summary>
/// Extension methods for using serializers on instances of IMessageLite/IBuilderLite
/// </summary>
public static class Extensions
{
#region IMessageLite Extension
/// <summary>
/// Serializes the message to JSON text. This is a trivial wrapper
/// around Serialization.JsonFormatWriter.WriteMessage.
/// </summary>
public static string ToJson(
#if !NOEXTENSIONS
this
#endif
IMessageLite message)
{
JsonFormatWriter w = JsonFormatWriter.CreateInstance();
w.WriteMessage(message);
return w.ToString();
}
/// <summary>
/// Serializes the message to XML text. This is a trivial wrapper
/// around Serialization.XmlFormatWriter.WriteMessage.
/// </summary>
public static string ToXml(
#if !NOEXTENSIONS
this
#endif
IMessageLite message)
{
StringWriter w = new StringWriter(new StringBuilder(4096));
XmlFormatWriter.CreateInstance(w).WriteMessage(message);
return w.ToString();
}
/// <summary>
/// Serializes the message to XML text using the element name provided.
/// This is a trivial wrapper around Serialization.XmlFormatWriter.WriteMessage.
/// </summary>
public static string ToXml(
#if !NOEXTENSIONS
this
#endif
IMessageLite message, string rootElementName)
{
StringWriter w = new StringWriter(new StringBuilder(4096));
XmlFormatWriter.CreateInstance(w).WriteMessage(rootElementName, message);
return w.ToString();
}
/// <summary>
/// Writes the message instance to the stream using the content type provided
/// </summary>
/// <param name="message">An instance of a message</param>
/// <param name="options">Options specific to writing this message and/or content type</param>
/// <param name="contentType">The mime type of the content to be written</param>
/// <param name="output">The stream to write the message to</param>
public static void WriteTo(
#if !NOEXTENSIONS
this
#endif
IMessageLite message, MessageFormatOptions options, string contentType, Stream output)
{
ICodedOutputStream codedOutput = MessageFormatFactory.CreateOutputStream(options, contentType, output);
// Output the appropriate message preamble
codedOutput.WriteMessageStart();
// Write the message content to the output
message.WriteTo(codedOutput);
// Write the closing message fragment
codedOutput.WriteMessageEnd();
codedOutput.Flush();
}
#endregion
#region IBuilderLite Extensions
/// <summary>
/// Merges a JSON object into this builder and returns
/// </summary>
public static TBuilder MergeFromJson<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, string jsonText) where TBuilder : IBuilderLite
{
return JsonFormatReader.CreateInstance(jsonText)
.Merge(builder);
}
/// <summary>
/// Merges a JSON object into this builder and returns
/// </summary>
public static TBuilder MergeFromJson<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, TextReader reader) where TBuilder : IBuilderLite
{
return MergeFromJson(builder, reader, ExtensionRegistry.Empty);
}
/// <summary>
/// Merges a JSON object into this builder using the extensions provided and returns
/// </summary>
public static TBuilder MergeFromJson<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, TextReader reader, ExtensionRegistry extensionRegistry) where TBuilder : IBuilderLite
{
return JsonFormatReader.CreateInstance(reader)
.Merge(builder, extensionRegistry);
}
/// <summary>
/// Merges an XML object into this builder and returns
/// </summary>
public static TBuilder MergeFromXml<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, XmlReader reader) where TBuilder : IBuilderLite
{
return MergeFromXml(builder, XmlFormatReader.DefaultRootElementName, reader, ExtensionRegistry.Empty);
}
/// <summary>
/// Merges an XML object into this builder and returns
/// </summary>
public static TBuilder MergeFromXml<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, string rootElementName, XmlReader reader) where TBuilder : IBuilderLite
{
return MergeFromXml(builder, rootElementName, reader, ExtensionRegistry.Empty);
}
/// <summary>
/// Merges an XML object into this builder using the extensions provided and returns
/// </summary>
public static TBuilder MergeFromXml<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, string rootElementName, XmlReader reader,
ExtensionRegistry extensionRegistry) where TBuilder : IBuilderLite
{
return XmlFormatReader.CreateInstance(reader)
.Merge(rootElementName, builder, extensionRegistry);
}
/// <summary>
/// Merges the message from the input stream based on the contentType provided
/// </summary>
/// <typeparam name="TBuilder">A type derived from IBuilderLite</typeparam>
/// <param name="builder">An instance of a message builder</param>
/// <param name="options">Options specific to reading this message and/or content type</param>
/// <param name="contentType">The mime type of the input stream content</param>
/// <param name="input">The stream to read the message from</param>
/// <returns>The same builder instance that was supplied in the builder parameter</returns>
public static TBuilder MergeFrom<TBuilder>(
#if !NOEXTENSIONS
this
#endif
TBuilder builder, MessageFormatOptions options, string contentType, Stream input) where TBuilder : IBuilderLite
{
ICodedInputStream codedInput = MessageFormatFactory.CreateInputStream(options, contentType, input);
codedInput.ReadMessageStart();
builder.WeakMergeFrom(codedInput, options.ExtensionRegistry);
codedInput.ReadMessageEnd();
return builder;
}
#endregion
}
}
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