diff options
Diffstat (limited to 'csharp/src/ProtocolBuffers.Serialization/XmlFormatReader.cs')
| -rw-r--r-- | csharp/src/ProtocolBuffers.Serialization/XmlFormatReader.cs | 338 |
1 files changed, 0 insertions, 338 deletions
diff --git a/csharp/src/ProtocolBuffers.Serialization/XmlFormatReader.cs b/csharp/src/ProtocolBuffers.Serialization/XmlFormatReader.cs deleted file mode 100644 index a4f111d4..00000000 --- a/csharp/src/ProtocolBuffers.Serialization/XmlFormatReader.cs +++ /dev/null @@ -1,338 +0,0 @@ -using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Xml;
-using System.Diagnostics;
-
-namespace Google.ProtocolBuffers.Serialization
-{
- /// <summary>
- /// Parses a proto buffer from an XML document or fragment. .NET 3.5 users may also
- /// use this class to process Json by setting the options to support Json and providing
- /// an XmlReader obtained from <see cref="System.Runtime.Serialization.Json.JsonReaderWriterFactory"/>.
- /// </summary>
- public class XmlFormatReader : AbstractTextReader
- {
- public const string DefaultRootElementName = XmlFormatWriter.DefaultRootElementName;
- private readonly XmlReader _input;
- // Tracks the message element for each nested message read
- private readonly Stack<ElementStackEntry> _elements;
- // The default element name for ReadMessageStart
- private string _rootElementName;
-
- private struct ElementStackEntry
- {
- public readonly string LocalName;
- public readonly int Depth;
- public readonly bool IsEmpty;
-
- public ElementStackEntry(string localName, int depth, bool isEmpty) : this()
- {
- LocalName = localName;
- IsEmpty = isEmpty;
- Depth = depth;
- }
- }
-
- private static XmlReaderSettings DefaultSettings
- {
- get
- {
- return new XmlReaderSettings()
- {CheckCharacters = false, IgnoreComments = true, IgnoreProcessingInstructions = true};
- }
- }
-
- /// <summary>
- /// Constructs the XmlFormatReader using the stream provided as the xml
- /// </summary>
- public static XmlFormatReader CreateInstance(byte[] input)
- {
- return new XmlFormatReader(XmlReader.Create(new MemoryStream(input, false), DefaultSettings));
- }
-
- /// <summary>
- /// Constructs the XmlFormatReader using the stream provided as the xml
- /// </summary>
- public static XmlFormatReader CreateInstance(Stream input)
- {
- return new XmlFormatReader(XmlReader.Create(input, DefaultSettings));
- }
-
- /// <summary>
- /// Constructs the XmlFormatReader using the string provided as the xml to be read
- /// </summary>
- public static XmlFormatReader CreateInstance(String input)
- {
- return new XmlFormatReader(XmlReader.Create(new StringReader(input), DefaultSettings));
- }
-
- /// <summary>
- /// Constructs the XmlFormatReader using the xml in the TextReader
- /// </summary>
- public static XmlFormatReader CreateInstance(TextReader input)
- {
- return new XmlFormatReader(XmlReader.Create(input, DefaultSettings));
- }
-
- /// <summary>
- /// Constructs the XmlFormatReader with the XmlReader
- /// </summary>
- public static XmlFormatReader CreateInstance(XmlReader input)
- {
- return new XmlFormatReader(input);
- }
-
- /// <summary>
- /// Constructs the XmlFormatReader with the XmlReader and options
- /// </summary>
- protected XmlFormatReader(XmlReader input)
- {
- _input = input;
- _rootElementName = DefaultRootElementName;
- _elements = new Stack<ElementStackEntry>();
- Options = XmlReaderOptions.None;
- }
-
- /// <summary>
- /// Gets or sets the options to use when reading the xml
- /// </summary>
- public XmlReaderOptions Options { get; set; }
-
- /// <summary>
- /// Sets the options to use while generating the XML
- /// </summary>
- public XmlFormatReader SetOptions(XmlReaderOptions options)
- {
- Options = options;
- return this;
- }
-
- /// <summary>
- /// Gets or sets the default element name to use when using the Merge<TBuilder>()
- /// </summary>
- public string RootElementName
- {
- get { return _rootElementName; }
- set
- {
- ThrowHelper.ThrowIfNull(value, "RootElementName");
- _rootElementName = value;
- }
- }
-
- [DebuggerNonUserCode]
- private static void Assert(bool cond)
- {
- if (!cond)
- {
- throw new FormatException();
- }
- }
-
- /// <summary>
- /// Reads the root-message preamble specific to this formatter
- /// </summary>
- public override void ReadMessageStart()
- {
- ReadMessageStart(_rootElementName);
- }
-
- /// <summary>
- /// Reads the root-message preamble specific to this formatter
- /// </summary>
- public void ReadMessageStart(string element)
- {
- while (!_input.IsStartElement() && _input.Read())
- {
- continue;
- }
- Assert(_input.IsStartElement() && _input.LocalName == element);
- _elements.Push(new ElementStackEntry(element, _input.Depth, _input.IsEmptyElement));
- _input.Read();
- }
-
- /// <summary>
- /// Reads the root-message close specific to this formatter, MUST be called
- /// on the reader obtained from ReadMessageStart(string element).
- /// </summary>
- public override void ReadMessageEnd()
- {
- Assert(_elements.Count > 0);
-
- ElementStackEntry stop = _elements.Peek();
- while (_input.NodeType != XmlNodeType.EndElement && _input.NodeType != XmlNodeType.Element
- && _input.Depth > stop.Depth && _input.Read())
- {
- continue;
- }
-
- if (!stop.IsEmpty)
- {
- Assert(_input.NodeType == XmlNodeType.EndElement
- && _input.LocalName == stop.LocalName
- && _input.Depth == stop.Depth);
-
- _input.Read();
- }
- _elements.Pop();
- }
-
- /// <summary>
- /// Merge the provided builder as an element named <see cref="RootElementName"/> in the current context
- /// </summary>
- public override TBuilder Merge<TBuilder>(TBuilder builder, ExtensionRegistry registry)
- {
- return Merge(_rootElementName, builder, registry);
- }
-
- /// <summary>
- /// Merge the provided builder as an element of the current context
- /// </summary>
- public TBuilder Merge<TBuilder>(string element, TBuilder builder) where TBuilder : IBuilderLite
- {
- return Merge(element, builder, ExtensionRegistry.Empty);
- }
-
- /// <summary>
- /// Merge the provided builder as an element of the current context
- /// </summary>
- public TBuilder Merge<TBuilder>(string element, TBuilder builder, ExtensionRegistry registry)
- where TBuilder : IBuilderLite
- {
- ReadMessageStart(element);
- builder.WeakMergeFrom(this, registry);
- ReadMessageEnd();
- return builder;
- }
-
- /// <summary>
- /// Peeks at the next field in the input stream and returns what information is available.
- /// </summary>
- /// <remarks>
- /// This may be called multiple times without actually reading the field. Only after the field
- /// is either read, or skipped, should PeekNext return a different value.
- /// </remarks>
- protected override bool PeekNext(out string field)
- {
- ElementStackEntry stopNode;
- if (_elements.Count == 0)
- {
- stopNode = new ElementStackEntry(null, _input.Depth - 1, false);
- }
- else
- {
- stopNode = _elements.Peek();
- }
-
- if (!stopNode.IsEmpty)
- {
- while (!_input.IsStartElement() && _input.Depth > stopNode.Depth && _input.Read())
- {
- continue;
- }
-
- if (_input.IsStartElement() && _input.Depth > stopNode.Depth)
- {
- field = _input.LocalName;
- return true;
- }
- }
- field = null;
- return false;
- }
-
- /// <summary>
- /// Causes the reader to skip past this field
- /// </summary>
- protected override void Skip()
- {
- if (_input.IsStartElement())
- {
- if (!_input.IsEmptyElement)
- {
- int depth = _input.Depth;
- while (_input.Depth >= depth && _input.NodeType != XmlNodeType.EndElement)
- {
- Assert(_input.Read());
- }
- }
- _input.Read();
- }
- }
-
- /// <summary>
- /// returns true if it was able to read a single value into the value reference. The value
- /// stored may be of type System.String, System.Int32, or an IEnumLite from the IEnumLiteMap.
- /// </summary>
- protected override bool ReadEnum(ref object value)
- {
- int number;
- string temp;
- if (null != (temp = _input.GetAttribute("value")) && FrameworkPortability.TryParseInt32(temp, out number))
- {
- Skip();
- value = number;
- return true;
- }
- return base.ReadEnum(ref value);
- }
-
- /// <summary>
- /// Returns true if it was able to read a String from the input
- /// </summary>
- protected override bool ReadAsText(ref string value, Type type)
- {
- Assert(_input.NodeType == XmlNodeType.Element);
- value = _input.ReadElementContentAsString();
-
- return true;
- }
-
- /// <summary>
- /// Merges the input stream into the provided IBuilderLite
- /// </summary>
- protected override bool ReadMessage(IBuilderLite builder, ExtensionRegistry registry)
- {
- Assert(_input.IsStartElement());
- ReadMessageStart(_input.LocalName);
- builder.WeakMergeFrom(this, registry);
- ReadMessageEnd();
- return true;
- }
-
- private IEnumerable<string> NonNestedArrayItems(string field)
- {
- return base.ForeachArrayItem(field);
- }
-
- /// <summary>
- /// Cursors through the array elements and stops at the end of the array
- /// </summary>
- protected override IEnumerable<string> ForeachArrayItem(string field)
- {
- bool isNested = (Options & XmlReaderOptions.ReadNestedArrays) != 0;
-
- if (!isNested)
- {
- foreach (string item in NonNestedArrayItems(field))
- {
- yield return item;
- }
- }
- else
- {
- string found;
- ReadMessageStart(field);
- if (PeekNext(out found) && found == "item")
- {
- foreach (string item in NonNestedArrayItems("item"))
- {
- yield return item;
- }
- }
- ReadMessageEnd();
- }
- }
- }
-}
\ No newline at end of file |