pos/is4c-nf/scale-drivers/drivers/NewMagellan/Newtonsoft.Json/Linq/JProperty.cs
#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
using Newtonsoft.Json.Utilities;
using System.Diagnostics;
using System.Globalization;
namespace Newtonsoft.Json.Linq
{
/// <summary>
/// Represents a JSON property.
/// </summary>
public class JProperty : JContainer
{
#region JPropertyList
private class JPropertyList : IList<JToken>
{
internal JToken _token;
public IEnumerator<JToken> GetEnumerator()
{
if (_token != null)
yield return _token;
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public void Add(JToken item)
{
_token = item;
}
public void Clear()
{
_token = null;
}
public bool Contains(JToken item)
{
return (_token == item);
}
public void CopyTo(JToken[] array, int arrayIndex)
{
if (_token != null)
array[arrayIndex] = _token;
}
public bool Remove(JToken item)
{
if (_token == item)
{
_token = null;
return true;
}
return false;
}
public int Count
{
get { return (_token != null) ? 1 : 0; }
}
public bool IsReadOnly
{
get { return false; }
}
public int IndexOf(JToken item)
{
return (_token == item) ? 0 : -1;
}
public void Insert(int index, JToken item)
{
if (index == 0)
_token = item;
}
public void RemoveAt(int index)
{
if (index == 0)
_token = null;
}
public JToken this[int index]
{
get { return (index == 0) ? _token : null; }
set
{
if (index == 0)
_token = value;
}
}
}
#endregion
private readonly JPropertyList _content = new JPropertyList();
private readonly string _name;
/// <summary>
/// Gets the container's children tokens.
/// </summary>
/// <value>The container's children tokens.</value>
protected override IList<JToken> ChildrenTokens
{
get { return _content; }
}
/// <summary>
/// Gets the property name.
/// </summary>
/// <value>The property name.</value>
public string Name
{
[DebuggerStepThrough]
get { return _name; }
}
/// <summary>
/// Gets or sets the property value.
/// </summary>
/// <value>The property value.</value>
public JToken Value
{
[DebuggerStepThrough]
get { return _content._token; }
set
{
CheckReentrancy();
JToken newValue = value ?? JValue.CreateNull();
if (_content._token == null)
{
InsertItem(0, newValue, false);
}
else
{
SetItem(0, newValue);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="JProperty"/> class from another <see cref="JProperty"/> object.
/// </summary>
/// <param name="other">A <see cref="JProperty"/> object to copy from.</param>
public JProperty(JProperty other)
: base(other)
{
_name = other.Name;
}
internal override JToken GetItem(int index)
{
if (index != 0)
throw new ArgumentOutOfRangeException();
return Value;
}
internal override void SetItem(int index, JToken item)
{
if (index != 0)
throw new ArgumentOutOfRangeException();
if (IsTokenUnchanged(Value, item))
return;
if (Parent != null)
((JObject)Parent).InternalPropertyChanging(this);
base.SetItem(0, item);
if (Parent != null)
((JObject)Parent).InternalPropertyChanged(this);
}
internal override bool RemoveItem(JToken item)
{
throw new JsonException("Cannot add or remove items from {0}.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
}
internal override void RemoveItemAt(int index)
{
throw new JsonException("Cannot add or remove items from {0}.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
}
internal override void InsertItem(int index, JToken item, bool skipParentCheck)
{
// don't add comments to JProperty
if (item != null && item.Type == JTokenType.Comment)
return;
if (Value != null)
throw new JsonException("{0} cannot have multiple values.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
base.InsertItem(0, item, false);
}
internal override bool ContainsItem(JToken item)
{
return (Value == item);
}
internal override void MergeItem(object content, JsonMergeSettings settings)
{
JProperty p = content as JProperty;
if (p == null)
return;
if (p.Value != null && p.Value.Type != JTokenType.Null)
Value = p.Value;
}
internal override void ClearItems()
{
throw new JsonException("Cannot add or remove items from {0}.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
}
internal override bool DeepEquals(JToken node)
{
JProperty t = node as JProperty;
return (t != null && _name == t.Name && ContentsEqual(t));
}
internal override JToken CloneToken()
{
return new JProperty(this);
}
/// <summary>
/// Gets the node type for this <see cref="JToken"/>.
/// </summary>
/// <value>The type.</value>
public override JTokenType Type
{
[DebuggerStepThrough]
get { return JTokenType.Property; }
}
internal JProperty(string name)
{
// called from JTokenWriter
ValidationUtils.ArgumentNotNull(name, "name");
_name = name;
}
/// <summary>
/// Initializes a new instance of the <see cref="JProperty"/> class.
/// </summary>
/// <param name="name">The property name.</param>
/// <param name="content">The property content.</param>
public JProperty(string name, params object[] content)
: this(name, (object)content)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="JProperty"/> class.
/// </summary>
/// <param name="name">The property name.</param>
/// <param name="content">The property content.</param>
public JProperty(string name, object content)
{
ValidationUtils.ArgumentNotNull(name, "name");
_name = name;
Value = IsMultiContent(content)
? new JArray(content)
: CreateFromContent(content);
}
/// <summary>
/// Writes this token to a <see cref="JsonWriter"/>.
/// </summary>
/// <param name="writer">A <see cref="JsonWriter"/> into which this method will write.</param>
/// <param name="converters">A collection of <see cref="JsonConverter"/> which will be used when writing the token.</param>
public override void WriteTo(JsonWriter writer, params JsonConverter[] converters)
{
writer.WritePropertyName(_name);
JToken value = Value;
if (value != null)
value.WriteTo(writer, converters);
else
writer.WriteNull();
}
internal override int GetDeepHashCode()
{
return _name.GetHashCode() ^ ((Value != null) ? Value.GetDeepHashCode() : 0);
}
/// <summary>
/// Loads an <see cref="JProperty"/> from a <see cref="JsonReader"/>.
/// </summary>
/// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JProperty"/>.</param>
/// <returns>A <see cref="JProperty"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
public new static JProperty Load(JsonReader reader)
{
if (reader.TokenType == JsonToken.None)
{
if (!reader.Read())
throw JsonReaderException.Create(reader, "Error reading JProperty from JsonReader.");
}
while (reader.TokenType == JsonToken.Comment)
{
reader.Read();
}
if (reader.TokenType != JsonToken.PropertyName)
throw JsonReaderException.Create(reader, "Error reading JProperty from JsonReader. Current JsonReader item is not a property: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
JProperty p = new JProperty((string)reader.Value);
p.SetLineInfo(reader as IJsonLineInfo);
p.ReadTokenFrom(reader);
return p;
}
}
}