401 lines
12 KiB
C#
401 lines
12 KiB
C#
#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using LC.Newtonsoft.Json.Utilities;
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using System.Diagnostics;
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using System.Globalization;
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namespace LC.Newtonsoft.Json.Linq
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{
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/// <summary>
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/// Represents a JSON property.
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/// </summary>
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public partial class JProperty : JContainer
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{
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#region JPropertyList
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private class JPropertyList : IList<JToken>
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{
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internal JToken? _token;
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public IEnumerator<JToken> GetEnumerator()
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{
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if (_token != null)
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{
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yield return _token;
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}
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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public void Add(JToken item)
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{
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_token = item;
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}
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public void Clear()
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{
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_token = null;
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}
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public bool Contains(JToken item)
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{
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return (_token == item);
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}
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public void CopyTo(JToken[] array, int arrayIndex)
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{
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if (_token != null)
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{
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array[arrayIndex] = _token;
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}
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}
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public bool Remove(JToken item)
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{
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if (_token == item)
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{
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_token = null;
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return true;
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}
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return false;
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}
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public int Count => (_token != null) ? 1 : 0;
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public bool IsReadOnly => false;
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public int IndexOf(JToken item)
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{
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return (_token == item) ? 0 : -1;
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}
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public void Insert(int index, JToken item)
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{
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if (index == 0)
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{
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_token = item;
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}
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}
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public void RemoveAt(int index)
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{
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if (index == 0)
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{
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_token = null;
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}
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}
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public JToken this[int index]
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{
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get
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{
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if (index != 0)
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{
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throw new IndexOutOfRangeException();
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}
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MiscellaneousUtils.Assert(_token != null);
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return _token;
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}
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set
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{
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if (index != 0)
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{
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throw new IndexOutOfRangeException();
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}
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_token = value;
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}
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}
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}
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#endregion
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private readonly JPropertyList _content = new JPropertyList();
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private readonly string _name;
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/// <summary>
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/// Gets the container's children tokens.
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/// </summary>
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/// <value>The container's children tokens.</value>
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protected override IList<JToken> ChildrenTokens => _content;
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/// <summary>
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/// Gets the property name.
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/// </summary>
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/// <value>The property name.</value>
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public string Name
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{
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[DebuggerStepThrough]
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get { return _name; }
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}
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/// <summary>
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/// Gets or sets the property value.
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/// </summary>
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/// <value>The property value.</value>
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public JToken Value
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{
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[DebuggerStepThrough]
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get { return _content._token!; }
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set
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{
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CheckReentrancy();
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JToken newValue = value ?? JValue.CreateNull();
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if (_content._token == null)
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{
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InsertItem(0, newValue, false);
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}
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else
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{
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SetItem(0, newValue);
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}
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="JProperty"/> class from another <see cref="JProperty"/> object.
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/// </summary>
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/// <param name="other">A <see cref="JProperty"/> object to copy from.</param>
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public JProperty(JProperty other)
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: base(other)
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{
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_name = other.Name;
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}
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internal override JToken GetItem(int index)
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{
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if (index != 0)
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{
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throw new ArgumentOutOfRangeException();
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}
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return Value;
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}
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internal override void SetItem(int index, JToken? item)
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{
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if (index != 0)
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{
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throw new ArgumentOutOfRangeException();
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}
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if (IsTokenUnchanged(Value, item))
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{
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return;
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}
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((JObject?)Parent)?.InternalPropertyChanging(this);
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base.SetItem(0, item);
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((JObject?)Parent)?.InternalPropertyChanged(this);
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}
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internal override bool RemoveItem(JToken? item)
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{
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throw new JsonException("Cannot add or remove items from {0}.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
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}
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internal override void RemoveItemAt(int index)
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{
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throw new JsonException("Cannot add or remove items from {0}.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
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}
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internal override int IndexOfItem(JToken? item)
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{
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if (item == null)
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{
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return -1;
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}
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return _content.IndexOf(item);
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}
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internal override void InsertItem(int index, JToken? item, bool skipParentCheck)
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{
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// don't add comments to JProperty
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if (item != null && item.Type == JTokenType.Comment)
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{
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return;
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}
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if (Value != null)
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{
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throw new JsonException("{0} cannot have multiple values.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
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}
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base.InsertItem(0, item, false);
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}
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internal override bool ContainsItem(JToken? item)
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{
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return (Value == item);
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}
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internal override void MergeItem(object content, JsonMergeSettings? settings)
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{
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JToken? value = (content as JProperty)?.Value;
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if (value != null && value.Type != JTokenType.Null)
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{
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Value = value;
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}
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}
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internal override void ClearItems()
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{
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throw new JsonException("Cannot add or remove items from {0}.".FormatWith(CultureInfo.InvariantCulture, typeof(JProperty)));
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}
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internal override bool DeepEquals(JToken node)
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{
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return (node is JProperty t && _name == t.Name && ContentsEqual(t));
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}
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internal override JToken CloneToken()
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{
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return new JProperty(this);
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}
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/// <summary>
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/// Gets the node type for this <see cref="JToken"/>.
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/// </summary>
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/// <value>The type.</value>
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public override JTokenType Type
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{
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[DebuggerStepThrough]
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get { return JTokenType.Property; }
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}
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internal JProperty(string name)
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{
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// called from JTokenWriter
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ValidationUtils.ArgumentNotNull(name, nameof(name));
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_name = name;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="JProperty"/> class.
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/// </summary>
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/// <param name="name">The property name.</param>
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/// <param name="content">The property content.</param>
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public JProperty(string name, params object[] content)
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: this(name, (object)content)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="JProperty"/> class.
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/// </summary>
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/// <param name="name">The property name.</param>
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/// <param name="content">The property content.</param>
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public JProperty(string name, object? content)
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{
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ValidationUtils.ArgumentNotNull(name, nameof(name));
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_name = name;
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Value = IsMultiContent(content)
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? new JArray(content)
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: CreateFromContent(content);
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}
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/// <summary>
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/// Writes this token to a <see cref="JsonWriter"/>.
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/// </summary>
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/// <param name="writer">A <see cref="JsonWriter"/> into which this method will write.</param>
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/// <param name="converters">A collection of <see cref="JsonConverter"/> which will be used when writing the token.</param>
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public override void WriteTo(JsonWriter writer, params JsonConverter[] converters)
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{
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writer.WritePropertyName(_name);
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JToken value = Value;
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if (value != null)
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{
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value.WriteTo(writer, converters);
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}
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else
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{
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writer.WriteNull();
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}
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}
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internal override int GetDeepHashCode()
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{
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return _name.GetHashCode() ^ (Value?.GetDeepHashCode() ?? 0);
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}
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/// <summary>
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/// Loads a <see cref="JProperty"/> from a <see cref="JsonReader"/>.
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/// </summary>
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/// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JProperty"/>.</param>
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/// <returns>A <see cref="JProperty"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
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public new static JProperty Load(JsonReader reader)
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{
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return Load(reader, null);
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}
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/// <summary>
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/// Loads a <see cref="JProperty"/> from a <see cref="JsonReader"/>.
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/// </summary>
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/// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JProperty"/>.</param>
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/// <param name="settings">The <see cref="JsonLoadSettings"/> used to load the JSON.
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/// If this is <c>null</c>, default load settings will be used.</param>
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/// <returns>A <see cref="JProperty"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
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public new static JProperty Load(JsonReader reader, JsonLoadSettings? settings)
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{
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if (reader.TokenType == JsonToken.None)
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{
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if (!reader.Read())
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{
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throw JsonReaderException.Create(reader, "Error reading JProperty from JsonReader.");
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}
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}
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reader.MoveToContent();
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if (reader.TokenType != JsonToken.PropertyName)
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{
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throw JsonReaderException.Create(reader, "Error reading JProperty from JsonReader. Current JsonReader item is not a property: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
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}
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JProperty p = new JProperty((string)reader.Value!);
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p.SetLineInfo(reader as IJsonLineInfo, settings);
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p.ReadTokenFrom(reader, settings);
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return p;
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}
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}
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} |