/// <summary>
/// Finds and replaces constants (bool, number, string constants)
/// </summary>
/// <param name="tokens">tokens input</param>
/// <returns>tokens</returns>
private static List <FilterExpressionToken> ReplaceConstantExpressionTokens(List <FilterExpressionToken> tokens)
{
List <FilterExpressionToken> ret = new List <FilterExpressionToken>(tokens.Count);
for (int i = 0; i < tokens.Count; i++)
{
FilterExpressionToken t = tokens[i];
if (t is PrimitiveExpressionToken pet)
{
if (pet.Token.IsStringToken())
{
ret.Add(new ConstantStringExpressionToken(pet.Token.CastToStringToken()));
}
else if (pet.Token.IsBoolToken())
{
ret.Add(new ConstantBoolExpressionToken(pet.Token.CastToBoolToken()));
}
else if (pet.Token.IsNumberToken())
{
ret.Add(new ConstantNumberExpressionToken(pet.Token.CastToNumberToken()));
}
else
{
ret.Add(pet);
}
}
else
{
ret.Add(t);
}
}
return(ret);
}
private static void EnsureMethodArgumentsAreValid(MethodCallExpressionToken mct, ref int callCount)
{
callCount++;
if (callCount > 10 * 1000)
{
throw new InternalJsonPathwayException(
"Number of calls to EnsureTokensAreValidInner exceeded max expected number of 10000, possible stack overflow or infinite loop.");
}
if (mct.CalledOnExpression is MethodCallExpressionToken inner1)
{
EnsureMethodArgumentsAreValid(inner1, ref callCount);
}
foreach (FilterExpressionToken arg in mct.Arguments)
{
if (arg is MethodCallExpressionToken inner2)
{
EnsureMethodArgumentsAreValid(inner2, ref callCount);
}
}
FilterExpressionToken prim = mct.Arguments.FirstOrDefault(x => x is PrimitiveExpressionToken);
if (prim != null)
{
throw new UnexpectedTokenException((prim as PrimitiveExpressionToken).Token);
}
}
private static List <FilterExpressionToken> ReplaceMethodCallsOnArrayAccess(List <FilterExpressionToken> tokens)
{
List <ArrayAccessExpressionToken> arrayTokens = tokens.Where(x => x is ArrayAccessExpressionToken).Cast <ArrayAccessExpressionToken>().ToList();
List <FilterExpressionToken> ret = tokens.ToList();
foreach (ArrayAccessExpressionToken at in arrayTokens)
{
int arrayIndex = ret.IndexOf(at);
int dotIndex = arrayIndex + 1;
if (dotIndex < ret.Count - 4 && ret[dotIndex] is PrimitiveExpressionToken petDot && petDot.Token.IsSymbolToken('.'))
{
int methodNameIndex = dotIndex + 1;
if (ret[methodNameIndex] is PrimitiveExpressionToken petMethodName && petMethodName.Token.IsPropertyToken())
{
PropertyToken propToken = petMethodName.Token.CastToPropertyToken();
if (propToken.Escaped)
{
throw new UnexpectedTokenException(propToken, "Expected method call on array element");
}
string methodName = propToken.StringValue;
int openGroupIndex = methodNameIndex + 1;
if (openGroupIndex < ret.Count && ret[openGroupIndex] is OpenGroupToken ogt)
{
FilterExpressionToken closed = ret.FirstOrDefault(x => x is CloseGroupToken cgt && cgt.GroupId == ogt.GroupId);
if (closed == null)
{
throw new ParsingException("Failed to find ) for ( at " + ogt.StartIndex);
}
List <FilterExpressionToken> args = new List <FilterExpressionToken>();
int startIndex = ret.IndexOf(ogt);
int endIndex = ret.IndexOf(closed);
for (int i = startIndex + 1; i < endIndex; i++)
{
args.Add(ret[i]);
}
args = FormatAndValidateMethodArgumentTokens(args);
ret[arrayIndex] = new MethodCallExpressionToken(at, methodName, args.ToArray());
for (int i = arrayIndex + 1; i <= endIndex; i++)
{
ret[i] = null;
}
}
}
}
}
return(ret.Where(x => x != null).ToList());
}
public ArrayAccessExpressionToken(FilterExpressionToken executedOn, AllArrayElementsToken token)
: this(executedOn, token as MultiCharToken)
{
if (token is null)
{
throw new ArgumentNullException(nameof(token));
}
IsAllArrayElements = true;
StartIndex = token.StartIndex;
}
public MethodCallExpressionToken(FilterExpressionToken calledOnExpression, string methodName, FilterExpressionToken[] arguments)
{
if (string.IsNullOrWhiteSpace(methodName))
{
throw new ArgumentException("Value not provided", nameof(methodName));
}
CalledOnExpression = calledOnExpression ?? throw new ArgumentNullException(nameof(calledOnExpression));
MethodName = methodName;
Arguments = arguments ?? throw new ArgumentNullException(nameof(arguments));
}
public ArrayAccessExpressionToken(FilterExpressionToken executedOn, ArrayElementsToken token)
: this(executedOn, token as MultiCharToken)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
SliceStart = token.SliceStart;
SliceEnd = token.SliceEnd;
SliceStep = token.SliceStep;
ExactElementsAccess = token.ExactElementsAccess;
StartIndex = token.StartIndex;
}
private ArrayAccessExpressionToken(FilterExpressionToken executedOn, MultiCharToken arrayToken)
{
if (arrayToken == null)
{
throw new ArgumentNullException(nameof(arrayToken));
}
ExecutedOn = executedOn ?? throw new ArgumentNullException(nameof(executedOn));
if (!(executedOn is PropertyExpressionToken) && !(executedOn is FilterExpressionToken))
{
throw new UnexpectedTokenException(arrayToken, "Array access can be applied to property or filter");
}
}
private static List <FilterExpressionToken> ReplaceMethodCallsOnMethodsInner(List <FilterExpressionToken> tokens, ref int callCount, out int replacedCount)
{
callCount++;
replacedCount = 0;
if (callCount > 10 * 1000)
{
throw new InternalJsonPathwayException(
"Number of calls to ReplaceMethodCallsOnMethodsInner exceeded max expected number of 10000, possible stack overflow or infinite loop.");
}
List <FilterExpressionToken> ret = tokens.ToList();
foreach (MethodCallExpressionToken mc in tokens.Where(x => x is MethodCallExpressionToken))
{
int index = ret.IndexOf(mc);
if (index < ret.Count - 4 && ret[index + 1] is PrimitiveExpressionToken pet1 && pet1.Token.IsSymbolToken('.') &&
ret[index + 2] is PrimitiveExpressionToken pet2 && pet2.Token.IsPropertyToken() &&
ret[index + 3] is OpenGroupToken)
{
OpenGroupToken open = ret[index + 3] as OpenGroupToken;
FilterExpressionToken close = ret.Single(x => x is CloseGroupToken cgt && cgt.GroupId == open.GroupId);
string methodName = (ret[index + 2] as PrimitiveExpressionToken).Token.CastToPropertyToken().StringValue;
List <FilterExpressionToken> args = new List <FilterExpressionToken>();
int closeIndex = ret.IndexOf(close);
for (int i = index + 4; i < closeIndex; i++)
{
args.Add(ret[i]);
}
args = FormatAndValidateMethodArgumentTokens(args);
ret[index] = new MethodCallExpressionToken(mc, methodName, args.ToArray());
for (int i = index + 1; i <= closeIndex; i++)
{
ret[i] = null;
}
replacedCount++;
}
}
return(ret.Where(x => x != null).ToList());
}
private static List <FilterExpressionToken> ReplaceMethodCallsOnConstants(List <FilterExpressionToken> tokens)
{
List <FilterExpressionToken> ret = tokens.ToList();
foreach (ConstantBaseExpressionToken ct in tokens.Where(x => x is ConstantBaseExpressionToken))
{
int index = ret.IndexOf(ct);
if (index < ret.Count - 4 && ret[index + 1] is PrimitiveExpressionToken pet1 && pet1.Token.IsSymbolToken('.') &&
ret[index + 2] is PrimitiveExpressionToken pet2 && pet2.Token.IsPropertyToken() &&
ret[index + 3] is OpenGroupToken)
{
OpenGroupToken open = ret[index + 3] as OpenGroupToken;
FilterExpressionToken close = ret.Single(x => x is CloseGroupToken cgt && cgt.GroupId == open.GroupId);
string methodName = (ret[index + 2] as PrimitiveExpressionToken).Token.CastToPropertyToken().StringValue;
List <FilterExpressionToken> args = new List <FilterExpressionToken>();
int closeIndex = ret.IndexOf(close);
for (int i = index + 4; i < closeIndex; i++)
{
args.Add(ret[i]);
}
args = FormatAndValidateMethodArgumentTokens(args);
ret[index] = new MethodCallExpressionToken(ct, methodName, args.ToArray());
for (int i = index + 1; i <= closeIndex; i++)
{
ret[i] = null;
}
}
}
return(ret.Where(x => x != null).ToList());
}
/// <summary>
/// Replaces chained property tokens with expression property tokens
/// </summary>
/// <param name="tokens">tokens input</param>
/// <returns>tokens</returns>
private static List <FilterExpressionToken> ReplacePropertyTokens(List <FilterExpressionToken> tokens)
{
List <PrimitiveExpressionToken> @symbols = tokens
.Where(x => x is PrimitiveExpressionToken pet && pet.Token.IsSymbolToken('@'))
.Cast <PrimitiveExpressionToken>()
.ToList();
if (!symbols.Any())
{
return(tokens);
}
List <(PropertyExpressionToken prop, List <FilterExpressionToken> primitives)> replacements = new List <(PropertyExpressionToken, List <FilterExpressionToken>)>();
foreach (PrimitiveExpressionToken st in @symbols)
{
List <PrimitiveExpressionToken> tokensForReplacement = new List <PrimitiveExpressionToken>();
tokensForReplacement.Add(st);
int index = tokens.IndexOf(st);
index++;
bool isPreviousDot = false;
while (index < tokens.Count)
{
FilterExpressionToken t = tokens[index];
isPreviousDot = index > 0 && (tokens[index - 1] is PrimitiveExpressionToken pet3 && pet3.Token.IsSymbolToken('.'));
bool isDot = t is PrimitiveExpressionToken pet && pet.Token.IsSymbolToken('.');
if (isDot)
{
if (isPreviousDot)
{
throw new UnexpectedTokenException((t as PrimitiveExpressionToken).Token);
}
index++;
continue;
}
if (t is PrimitiveExpressionToken pet2 && pet2.Token.IsPropertyToken())
{
PropertyToken prop = pet2.Token.CastToPropertyToken();
if (prop.Escaped && isPreviousDot)
{
throw new UnexpectedTokenException(prop, "Unexpected token after \".\" symbol");
}
tokensForReplacement.Add(t as PrimitiveExpressionToken);
index++;
continue;
}
if (t is PrimitiveExpressionToken pet4 && (pet4.Token.IsChildPropertiesToken() || pet4.Token.IsRecursivePropertiesToken()))
{
tokensForReplacement.Add(t as PrimitiveExpressionToken);
index++;
continue;
}
break;
}
List <PrimitiveExpressionToken> tokensToRemove = tokensForReplacement.ToList();
if (tokensForReplacement.First().Token.IsSymbolToken('@'))
{
tokensForReplacement = tokensForReplacement.Skip(1).ToList();
}
for (int i = 0; i < tokensForReplacement.Count - 1; i++)
{
if (tokensForReplacement[i].Token.IsChildPropertiesToken() || tokensForReplacement[i].Token.IsRecursivePropertiesToken())
{
// only last property can be wildcard * or recursive ..
string accessor = tokensForReplacement[i].Token.IsChildPropertiesToken() ? "\"*\"" : "\"..\"";
throw new ParsingException($"Unexpected token accessor {accessor} at {tokensForReplacement[i].Token.StartIndex}" +
", this kind of token is expected to be last in property chain");
}
}
PropertyExpressionToken propEx;
Token last = tokensForReplacement.Last().Token;
if (last.IsRecursivePropertiesToken())
{
List <PrimitiveExpressionToken> props = tokensForReplacement.Where(x => !x.Token.IsSymbolToken('@')).ToList();
props = tokensForReplacement.Take(props.Count - 1).ToList();
propEx = new PropertyExpressionToken(
props.Select(x => x.Token.CastToPropertyToken()).ToArray(),
tokensForReplacement.Last().Token.CastToRecursivePropertiesToken(),
tokensForReplacement.First().StartIndex
);
}
else if (last.IsChildPropertiesToken())
{
List <PrimitiveExpressionToken> props = tokensForReplacement.Where(x => !x.Token.IsSymbolToken('@')).ToList();
props = tokensForReplacement.Take(props.Count - 1).ToList();
propEx = new PropertyExpressionToken(
props.Select(x => x.Token.CastToPropertyToken()).ToArray(),
tokensForReplacement.Last().Token.CastToChildPropertiesToken(),
tokensForReplacement.First().StartIndex
);
}
else
{
propEx = new PropertyExpressionToken(
tokensForReplacement.Where(x => !x.Token.IsSymbolToken('@')).Select(x => x.Token.CastToPropertyToken()).ToArray(),
tokensForReplacement.First().StartIndex
);
}
replacements.Add((propEx, tokensToRemove.Cast <FilterExpressionToken>().ToList()));
}
List <FilterExpressionToken> ret = tokens.ToList();
foreach ((PropertyExpressionToken prop, List <FilterExpressionToken> primitives)r in replacements)
{
List <int> indexes = r.primitives.Select(x => ret.IndexOf(x)).ToList();
for (int i = indexes.First(); i <= indexes.Last(); i++)
{
ret[i] = null;
}
ret[indexes[0]] = r.prop;
}
return(ret.Where(x => x != null).ToList());
}
public PrimitiveFilterSubExpression(FilterExpressionToken token)
{
Token = token ?? throw new ArgumentNullException(nameof(token));
}
