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//
// ProductInfoHeaderValue.cs
//
// Authors:
// Marek Safar <marek.safar@gmail.com>
//
// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections.Generic;
namespace System.Net.Http.Headers
{
public class ProductInfoHeaderValue : ICloneable
{
public ProductInfoHeaderValue (ProductHeaderValue product)
{
if (product == null)
throw new ArgumentNullException ();
Product = product;
}
public ProductInfoHeaderValue (string comment)
{
Parser.Token.CheckComment (comment);
Comment = comment;
}
public ProductInfoHeaderValue (string productName, string productVersion)
{
Product = new ProductHeaderValue (productName, productVersion);
}
private ProductInfoHeaderValue ()
{
}
public string Comment { get; private set; }
public ProductHeaderValue Product { get; private set; }
object ICloneable.Clone ()
{
return MemberwiseClone ();
}
public override bool Equals (object obj)
{
var source = obj as ProductInfoHeaderValue;
if (source == null)
return false;
return Product != null ?
Product.Equals (source.Product) :
source.Comment == Comment;
}
public override int GetHashCode ()
{
return Product != null ?
Product.GetHashCode () :
Comment.GetHashCode ();
}
public static ProductInfoHeaderValue Parse (string input)
{
ProductInfoHeaderValue value;
if (TryParse (input, out value))
return value;
throw new FormatException (input);
}
public static bool TryParse (string input, out ProductInfoHeaderValue parsedValue)
{
parsedValue = null;
var lexer = new Lexer (input);
if (!TryParseElement (lexer, out parsedValue) || parsedValue == null)
return false;
if (lexer.Scan () != Token.Type.End) {
parsedValue = null;
return false;
}
return true;
}
internal static bool TryParse (string input, int minimalCount, out List<ProductInfoHeaderValue> result)
{
var list = new List<ProductInfoHeaderValue> ();
var lexer = new Lexer (input);
result = null;
while (true) {
ProductInfoHeaderValue element;
if (!TryParseElement (lexer, out element))
return false;
if (element == null) {
if (list != null && minimalCount <= list.Count) {
result = list;
return true;
}
return false;
}
list.Add (element);
}
}
static bool TryParseElement (Lexer lexer, out ProductInfoHeaderValue parsedValue)
{
string comment;
parsedValue = null;
Token t;
if (lexer.ScanCommentOptional (out comment, out t)) {
if (comment == null)
return false;
parsedValue = new ProductInfoHeaderValue ();
parsedValue.Comment = comment;
return true;
}
if (t == Token.Type.End)
return true;
if (t != Token.Type.Token)
return false;
var value = new ProductHeaderValue ();
value.Name = lexer.GetStringValue (t);
var pos = lexer.Position;
t = lexer.Scan ();
if (t == Token.Type.SeparatorSlash) {
t = lexer.Scan ();
if (t != Token.Type.Token)
return false;
value.Version = lexer.GetStringValue (t);
} else {
lexer.Position = pos;
}
parsedValue = new ProductInfoHeaderValue (value);
return true;
}
public override string ToString ()
{
if (Product == null)
return Comment;
return Product.ToString ();
}
}
}
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