/// <summary>
/// 预先读取
/// </summary>
/// <param name="index">从预读取序列中读取第几号元素（从0开始）</param>
/// <param name="skipQueue">是否跳过现有缓存，继续往下读取</param>
/// <returns>返回读取到的<see cref="ExtendJsonToken" />实例。</returns>
public ExtendJsonToken PreRead(int index = 0, bool skipQueue = false)
{
if (_nodeQueue.Count > 0)
{
if (index == 0)
{
return(_nodeQueue.Peek());
}
else if (index < _nodeQueue.Count)
{
return(_nodeQueue.ToArray()[index]);
}
}
if (base.Read())
{
ExtendJsonToken result = new ExtendJsonToken(this, setting);
_nodeQueue.Enqueue(result);
if (result != null)
{
RecordName(result);
}
return(result);
}
return(null);
}
/// <summary>
/// 按照Depth属性记录每一层的名称
/// </summary>
private void RecordName(ExtendJsonToken token)
{
bool needRecord = false;
string name = string.Empty;
if (!_nameDic.ContainsKey(token.Path))
{
if (token.TokenType == JsonToken.StartObject || token.TokenType == JsonToken.StartArray)
{
if (Value == null)
{
needRecord = true;
}
if (token.TokenType == JsonToken.StartObject && token.Path.IndexOf('[') >= 0)
{
name = _nameDic[token.Path.Substring(0, token.Path.IndexOf('['))];
}
}
//当当前读取到的节点时PropertyName时，按照当前节点的Value值记录
else if (token.TokenType == JsonToken.PropertyName)
{
name = token.Value;
needRecord = true;
}
}
if (needRecord)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
_nameDic.Add(token.Path, name);
}
}
/// <summary>
/// 根据当前_reader.Depth设置_name属性。
/// </summary>
private void SetNameByDepth(ExtendJsonToken token)
{
SetName(_nameDic[token.Path]);
if (string.IsNullOrEmpty(Name))
{
throw new NotImplementedException();
}
}
/// <summary>获取当前节点的特性名称与值的键值对数组。</summary>
/// <returns>返回当前节点的特性名称与值的键值对数组。</returns>
public string[,] GetAttributes()
{
string[,] result = new string[AttrDefLen, 2];
int index = 0;
while (true)
{
//开始预读一个节点
ExtendJsonToken token = _reader.PreRead(0);
if (token != null && token.TokenType == JsonToken.PropertyName)
{
if (token.Value[0] == _setting.AFC)
{
//当节点是PropertyName时，继续读下一个节点，如果是String，则表示是一组键值对
ExtendJsonToken nextToken = _reader.PreRead(1);
if (nextToken != null && nextToken.TokenType == JsonToken.String)
{
int len = result.GetLength(0);
if (len == index + 1)
{
string[,] newResult = new string[len * 2, 2];
Array.Copy(result, newResult, len);
result = newResult;
}
result[index, 0] = token.Value.Substring(1);
result[index, 1] = nextToken.Value;
_reader.RemovePreRead(2);
index++;
continue;
}
}
else if (string.Equals(token.Value, _setting.SAIN))
{
//当节点是PropertyName时，继续读下一个节点，如果是 _setting.SAIN(Exp:#text)，则表示是一组键值对
ExtendJsonToken nextToken = _reader.PreRead(1);
if (nextToken != null && nextToken.TokenType == JsonToken.String)
{
_reader.ExtendValue = nextToken.Value;
_reader.RemovePreRead(2);
}
}
}
break;
}
return(result);
}
private void SetValue(ExtendJsonToken token)
{
if (token.TokenType == JsonToken.String ||
token.TokenType == JsonToken.Boolean ||
token.TokenType == JsonToken.Bytes ||
token.TokenType == JsonToken.Date ||
token.TokenType == JsonToken.Float ||
token.TokenType == JsonToken.Integer)
{
ExtendValue = token.Value;
}
else
{
ExtendValue = string.Empty;
}
}
private ExtendJsonToken ReadCore()
{
if (_nodeQueue.Count > 0)
{
return(_nodeQueue.Dequeue());
}
if (base.Read())
{
if (ReadState == ReadState.EndOfFile)
{
return(null);
}
ExtendJsonToken result = new ExtendJsonToken(this, setting);
if (result != null)
{
RecordName(result);
}
return(result);
}
return(null);
}
public bool Read()
{
if (CurrentState == State.Start)
{
base.Read();
}
ResetName();
ResetValue();
ExtendJsonToken token = ReadCore();
if (token == null)
{
return(false);
}
//如果当前读取到的节点是PropertyName，说明有对应的Value，需要再读一次
if (token.TokenType == JsonToken.PropertyName)
{
SetName(token.Value);
ExtendJsonToken nextToken = ReadCore();
if (nextToken == null)
{
return(false);
}
if (nextToken.TokenType == JsonToken.StartArray)
{
ReadCore();
}
token = nextToken;
}
else if (token.TokenType == JsonToken.StartObject)
{
//如果是ObjectStart，那么需要预读3个节点，看是否为单独节点
//Exp:{"String":"Value"}
ExtendJsonToken[] tokens = new ExtendJsonToken[3];
for (int i = 0; i < 3; i++)
{
tokens[i] = PreRead(i);
}
if (tokens[0].TokenType == JsonToken.PropertyName && (tokens[1].TokenType == JsonToken.String ||
tokens[1].TokenType == JsonToken.Boolean ||
tokens[1].TokenType == JsonToken.Bytes ||
tokens[1].TokenType == JsonToken.Date ||
tokens[1].TokenType == JsonToken.Float ||
tokens[1].TokenType == JsonToken.Integer) &&
tokens[2].TokenType == JsonToken.EndObject)
{
SetName(tokens[0].Value);
SetValue(tokens[1]);
RemovePreRead(3);
return(true);
}
//设置名称
SetNameByDepth(token);
}
else if (token.TokenType == JsonToken.EndArray)
{
//设置名称
SetNameByDepth(token);
}
else
{
//设置名称
SetNameByDepth(token);
}
//读取完成后设置值
SetValue(token);
return(true);
}