/// <summary>
/// Parses a property starting with the colon after the property name.
/// </summary>
/// <param name="propertyName">The name of the property.</param>
/// <param name="propertyNameTextAnnotation">The name text annotation for the property.</param>
/// <returns>parsed object</returns>
private JsonProperty ParsePropertyWithName(string propertyName, JsonPropertyNameTextAnnotation propertyNameTextAnnotation)
{
// Each name is followed by : (colon)
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.Colon, "Invalid Token");
var nameValueSeparatorTextAnnotation = new JsonPropertyNameValueSeparatorTextAnnotation()
{
Text = this.tokenizer.TokenText
};
this.tokenizer.GetNextToken();
// Colon is followed by a value
ExceptionUtilities.Assert(this.IsValueType(this.tokenizer.TokenType), "Invalid Token");
JsonValue value = this.ParseValue();
var property = new JsonProperty(propertyName, value);
property.SetAnnotation(propertyNameTextAnnotation);
property.SetAnnotation(nameValueSeparatorTextAnnotation);
return(property);
}
/// <summary>
/// Parses Objects starting with left curly braces
/// </summary>
/// <returns>parsed object</returns>
private JsonObject ParseObject()
{
// An object begins with '{' (left brace)
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.LeftCurly, "Invalid Token");
// The stream cannot terminate without '}' (right brace)
ExceptionUtilities.Assert(this.tokenizer.HasMoreTokens(), "Invalid End Of Stream");
var startObjectTextAnnotation = new JsonStartObjectTextAnnotation()
{
Text = this.tokenizer.TokenText
};
this.tokenizer.GetNextToken();
// An object is an unordered set of name/value pairs. So next token cannot be anything other than name or '}'
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.RightCurly || this.tokenizer.TokenType == JsonTokenType.String, "Invalid Token");
var result = new JsonObject();
result.SetAnnotation(startObjectTextAnnotation);
JsonPropertySeparatorTextAnnotation propertySeparatorTextAnnotation = null;
while (this.tokenizer.HasMoreTokens())
{
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.String || this.tokenizer.TokenType == JsonTokenType.Comma || this.tokenizer.TokenType == JsonTokenType.RightCurly, "Invalid Token");
// End of Object
if (this.tokenizer.TokenType == JsonTokenType.RightCurly)
{
break;
}
else if (this.tokenizer.TokenType == JsonTokenType.String)
{
JsonPropertyNameTextAnnotation nameTextAnnotation;
string name = this.ParseName(out nameTextAnnotation);
JsonProperty property = this.ParsePropertyWithName(name, nameTextAnnotation);
if (propertySeparatorTextAnnotation != null)
{
property.SetAnnotation(propertySeparatorTextAnnotation);
}
propertySeparatorTextAnnotation = null;
result.Add(property);
// name/value pairs are separated by , (comma) or value can be followed by '}' (right brace)
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.Comma || this.tokenizer.TokenType == JsonTokenType.RightCurly, "Invalid Token");
}
else if (this.tokenizer.TokenType == JsonTokenType.Comma)
{
propertySeparatorTextAnnotation = new JsonPropertySeparatorTextAnnotation()
{
Text = this.tokenizer.TokenText
};
this.tokenizer.GetNextToken();
// Last property in the object should not be followed by a comma.
// Hence asserting that next token is yet another name.
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.String, "Invalid Token");
}
}
if (this.tokenizer.TokenType == JsonTokenType.RightCurly)
{
result.SetAnnotation(new JsonEndObjectTextAnnotation()
{
Text = this.tokenizer.TokenText
});
// Parser should always be promoted to next token when leaving the loop
if (this.tokenizer.HasMoreTokens())
{
this.tokenizer.GetNextToken();
}
}
return(result);
}
/// <summary>
/// Parses a property starting with the colon after the property name.
/// </summary>
/// <param name="propertyName">The name of the property.</param>
/// <param name="propertyNameTextAnnotation">The name text annotation for the property.</param>
/// <returns>parsed object</returns>
private JsonProperty ParsePropertyWithName(string propertyName, JsonPropertyNameTextAnnotation propertyNameTextAnnotation)
{
// Each name is followed by : (colon)
ExceptionUtilities.Assert(this.tokenizer.TokenType == JsonTokenType.Colon, "Invalid Token");
var nameValueSeparatorTextAnnotation = new JsonPropertyNameValueSeparatorTextAnnotation() { Text = this.tokenizer.TokenText };
this.tokenizer.GetNextToken();
// Colon is followed by a value
ExceptionUtilities.Assert(this.IsValueType(this.tokenizer.TokenType), "Invalid Token");
JsonValue value = this.ParseValue();
var property = new JsonProperty(propertyName, value);
property.SetAnnotation(propertyNameTextAnnotation);
property.SetAnnotation(nameValueSeparatorTextAnnotation);
return property;
}