private void ParseTokens()
{
if (_tokens.Current.IsNonSignificant())
{
ConsumeWhitelines();
}
while (_tokens.Current.Type != TokenType.EndOfFile)
{
switch (_tokens.Current.Type)
{
case TokenType.Include:
case TokenType.OptionalInclude:
_root.Add(ParseInclude(_root));
break;
// may contain one array and one array only
case TokenType.StartOfArray:
_root.Add(ParseArray(_root));
break;
case TokenType.StartOfObject:
_root.Add(ParseObject(_root).GetObject());
break;
case TokenType.LiteralValue:
if (_tokens.Current.IsNonSignificant())
{
ConsumeWhitelines();
}
if (_tokens.Current.Type != TokenType.LiteralValue)
{
break;
}
_root.Add(ParseObject(_root).GetObject());
break;
case TokenType.Comment:
case TokenType.EndOfLine:
case TokenType.EndOfFile:
case TokenType.EndOfObject:
case TokenType.EndOfArray:
_tokens.Next();
break;
default:
throw JsonPlusParserException.Create(_tokens.Current, null, string.Format(RS.IllegalTokenType, _tokens.Current.Type), null);
}
}
}
/// <see cref="IJsonPlusNode.Clone(IJsonPlusNode)"/>
public virtual IJsonPlusNode Clone(IJsonPlusNode newParent)
{
JsonPlusValue clone = new JsonPlusValue(newParent);
foreach (IJsonPlusNode value in this)
{
clone.Add(value.Clone(clone));
}
return(clone);
}
internal void EnsureMemberIsObject()
{
if (Type == JsonPlusType.Object)
{
return;
}
JsonPlusValue v = new JsonPlusValue(this);
JsonPlusObject o = new JsonPlusObject(v);
v.Add(o);
_internalValues.Add(v);
}
internal JsonPlusValue OlderValueThan(IJsonPlusNode marker)
{
List <JsonPlusObject> objectList = new List <JsonPlusObject>();
int index = 0;
while (index < _internalValues.Count)
{
JsonPlusValue value = _internalValues[index];
if (value.Any(v => ReferenceEquals(v, marker)))
{
break;
}
switch (value.Type)
{
case JsonPlusType.Object:
objectList.Add(value.GetObject());
break;
case JsonPlusType.Literal:
case JsonPlusType.Array:
objectList.Clear();
break;
}
index++;
}
if (objectList.Count == 0)
{
return(index == 0
? null
: _internalValues[index - 1]);
}
JsonPlusValue result = new JsonPlusValue(null);
JsonPlusObject o = new JsonPlusObject(result);
result.Add(o);
foreach (JsonPlusObject obj in objectList)
{
o.Merge(obj);
}
return(result);
}
private void ResolveAllSubstitution(bool resolveEnv)
{
foreach (JsonPlusSubstitution sub in _substitutions)
{
// Retrieve value
JsonPlusValue res;
try
{
res = ResolveSubstitution(sub);
}
catch (JsonPlusException e)
{
throw JsonPlusParserException.Create(sub, sub.Path, string.Format(RS.SubstitutionError, e.Message), e);
}
if (res != null)
{
sub.ResolvedValue = res;
continue;
}
if (resolveEnv)
{
// Try to pull value from environment
string envValue = null;
try
{
envValue = Environment.GetEnvironmentVariable(sub.Path.Value);
}
catch (Exception)
{
// ignored
}
if (envValue != null)
{
// undefined value resolved to an environment variable
res = new JsonPlusValue(sub.Parent);
if (envValue.NeedQuotes())
{
res.Add(new QuotedStringValue(sub.Parent, envValue));
}
else
{
res.Add(new UnquotedStringValue(sub.Parent, envValue));
}
sub.ResolvedValue = res;
continue;
}
}
// ${ throws exception if it is not resolved
if (sub.Required)
{
throw JsonPlusParserException.Create(sub, sub.Path, string.Format(RS.UnresolvedSubstitution, sub.Path));
}
sub.ResolvedValue = new EmptyValue(sub.Parent);
}
}
/// <summary>
/// Retrieves the next value token from the tokenizer and appends it
/// to the supplied element <paramref name="owner"/>.
/// </summary>
/// <param name="owner">The element to append the next token.</param>
/// <exception cref="Exception">End of file reached while trying to read a value</exception>
private JsonPlusValue ParseValue(IJsonPlusNode owner)
{
JsonPlusValue value = new JsonPlusValue(owner);
bool parsing = true;
while (parsing)
{
switch (_tokens.Current.Type)
{
case TokenType.Include:
case TokenType.OptionalInclude:
value.Add(ParseInclude(value));
break;
case TokenType.LiteralValue:
// Consume leading whitespaces.
if (_tokens.Current.IsNonSignificant())
{
ConsumeWhitespace();
}
if (_tokens.Current.Type != TokenType.LiteralValue)
{
break;
}
while (_tokens.Current.Type == TokenType.LiteralValue)
{
value.Add(JsonPlusLiteralValue.Create(value, _tokens.Current));
_tokens.Next();
}
break;
case TokenType.StartOfObject:
value.Add(ParseObject(value));
break;
case TokenType.StartOfArray:
value.Add(ParseArray(value));
break;
case TokenType.OptionalSubstitution:
case TokenType.Substitution:
JsonPlusPath pointerPath = JsonPlusPath.Parse(_tokens.Current.Value);
JsonPlusSubstitution sub = new JsonPlusSubstitution(value, pointerPath, _tokens.Current,
_tokens.Current.Type == TokenType.Substitution);
_substitutions.Add(sub);
value.Add(sub);
_tokens.Next();
break;
case TokenType.EndOfObject:
case TokenType.EndOfArray:
parsing = false;
break;
// comments automatically stop value parsing.
case TokenType.Comment:
ConsumeWhitelines();
parsing = false;
break;
case TokenType.EndOfLine:
parsing = false;
break;
case TokenType.EndOfFile:
case TokenType.ArraySeparator:
parsing = false;
break;
case TokenType.SelfAssignment:
JsonPlusSubstitution subAssign = new JsonPlusSubstitution(value, new JsonPlusPath(Path), _tokens.Current, false);
_substitutions.Add(subAssign);
value.Add(subAssign);
value.Add(ParseSelfAssignArray(value));
parsing = false;
break;
case TokenType.Assignment:
ConsumeWhitelines();
break;
default:
throw JsonPlusParserException.Create(_tokens.Current, Path, string.Format(RS.ErrAtUnexpectedToken, _tokens.Current.Type));
}
}
// trim trailing whitespace if result is a literal
if (value.Type == JsonPlusType.Literal)
{
if (value[value.Count - 1] is WhitespaceValue)
{
value.RemoveAt(value.Count - 1);
}
}
return(value);
}
