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using System;
using System.Globalization;
using System.Xml;
namespace Google.ProtocolBuffers.Serialization
{
/// <summary>
/// Provides a base class for text-parsing readers
/// </summary>
public abstract class AbstractTextReader : AbstractReader
{
/// <summary> Constructs a new reader </summary>
protected AbstractTextReader() { }
/// <summary>
/// Reads a typed field as a string
/// </summary>
protected abstract bool ReadAsText(ref string textValue, Type type);
/// <summary>
/// Returns true if it was able to read a String from the input
/// </summary>
protected override bool Read(ref string value)
{
string text = null;
if (ReadAsText(ref text, typeof(string)))
{
value = text;
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a Boolean from the input
/// </summary>
protected override bool Read(ref bool value)
{
string text = null;
if (ReadAsText(ref text, typeof(bool)))
{
value = XmlConvert.ToBoolean(text);
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a Int32 from the input
/// </summary>
protected override bool Read(ref int value)
{
string text = null;
if (ReadAsText(ref text, typeof(int)))
{
value = XmlConvert.ToInt32(text);
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a UInt32 from the input
/// </summary>
protected override bool Read(ref uint value)
{
string text = null;
if (ReadAsText(ref text, typeof(uint)))
{
value = XmlConvert.ToUInt32(text);
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a Int64 from the input
/// </summary>
protected override bool Read(ref long value)
{
string text = null;
if (ReadAsText(ref text, typeof(long)))
{
value = XmlConvert.ToInt64(text);
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a UInt64 from the input
/// </summary>
protected override bool Read(ref ulong value)
{
string text = null;
if (ReadAsText(ref text, typeof(ulong)))
{
value = XmlConvert.ToUInt64(text);
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a Single from the input
/// </summary>
protected override bool Read(ref float value)
{
string text = null;
if (ReadAsText(ref text, typeof(float)))
{
value = XmlConvert.ToSingle(text);
return true;
}
return false;
}
/// <summary>
/// Returns true if it was able to read a Double from the input
/// </summary>
protected override bool Read(ref double value)
{
string text = null;
if (ReadAsText(ref text, typeof(double)))
{
value = XmlConvert.ToDouble(text);
return true;
}
return false;
}
/// <summary>
/// Provides decoding of bytes read from the input stream
/// </summary>
protected virtual ByteString DecodeBytes(string bytes)
{
return ByteString.FromBase64(bytes);
}
/// <summary>
/// Returns true if it was able to read a ByteString from the input
/// </summary>
protected override bool Read(ref ByteString value)
{
string text = null;
if (ReadAsText(ref text, typeof(ByteString)))
{
value = DecodeBytes(text);
return true;
}
return false;
}
/// <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)
{
string text = null;
if (ReadAsText(ref text, typeof(Enum)))
{
int number;
if (FrameworkPortability.TryParseInt32(text, NumberStyles.Integer, FrameworkPortability.InvariantCulture, out number))
{
value = number;
return true;
}
value = text;
return true;
}
return false;
}
}
}
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