public bool Evaluate(out IJsonValue value, IJSONDocument document)
{
value = null;
JSONDocument doc = new JSONDocument();
foreach (var pair in _document)
{
IJsonValue outValue;
if (pair.Value.Evaluate(out outValue, document))
{
doc.Add(pair.Key, outValue.Value);
}
else
{
return(false);
}
}
if (doc.Count > 0)
{
value = new ObjectJsonValue(doc);
}
return(true);
}
/// <summary>
/// Returns a tuple of reduced JSON values.
/// Bug: Greater than = Greater than equals to.
/// </summary>
private static Tuple <IJsonValue, IJsonValue> GetJSONValueRange(IEnumerable <ComparisonPredicate> expressions)
{
IJsonValue pin1 = NullValue.Null;
IJsonValue pin2 = new ObjectJsonValue(new JSONDocument());
foreach (var compareExpression in expressions)
{
//If pin1 is greater than pin2 the result set will be null.
if (pin1.CompareTo(pin2) > 0)
{
return(null);
}
IJsonValue value = compareExpression.ConstantValues[0];
switch (compareExpression.Condition)
{
case Condition.Equals:
case Condition.Like:
if (pin2.CompareTo(value) < 0 || pin1.CompareTo(value) > 0)
{
return(null);
}
pin2 = pin1 = value;
break;
case Condition.GreaterThan:
if (value.CompareTo(pin2) >= 0)
{
return(null);
}
if (pin1.CompareTo(value) < 0)
{
pin1 = value;
}
break;
case Condition.GreaterThanEqualTo:
if (value.CompareTo(pin2) > 0)
{
return(null);
}
if (pin1.CompareTo(value) < 0)
{
pin1 = value;
}
break;
case Condition.LesserThan:
if (value.CompareTo(pin1) <= 0)
{
return(null);
}
if (pin2.CompareTo(value) > 0)
{
pin2 = value;
}
break;
case Condition.LesserThanEqualTo:
if (value.CompareTo(pin1) < 0)
{
return(null);
}
if (pin2.CompareTo(value) > 0)
{
pin2 = value;
}
break;
case Condition.Between:
//Both values could be equal.
if (value.CompareTo(pin2) > 0 ||
value.CompareTo(compareExpression.ConstantValues[0]) > 0)
{
return(null);
}
pin1 = value;
pin2 = compareExpression.ConstantValues[0];
break;
case Condition.IsNull:
if (NullValue.Null.CompareTo(pin1) > 0)
{
return(null);
}
pin1 = pin2 = NullValue.Null;
break;
case Condition.IsNotNull:
if (NullValue.Null.CompareTo(pin2) == 0)
{
return(null);
}
pin1 = new BooleanJsonValue(false);
break;
case Condition.Exists:
break;
case Condition.NotExists:
return(null);
}
}
return(new Tuple <IJsonValue, IJsonValue>(pin1, pin2));
}
public static IJsonValue Wrap(object value)
{
if (value is JValue)
{
value = ((JValue)value).Value;
}
FieldDataType dataType = JSONType.GetJSONType(value);
IJsonValue jsonValue = null;
switch (dataType)
{
case FieldDataType.Array:
var values = new List <IJsonValue>();
if (value is System.Collections.ArrayList)
{
var array = (System.Collections.ArrayList)value;
foreach (var obj in array)
{
values.Add(Wrap(obj));
}
}
else
{
var array = (Array)value;
foreach (var obj in array)
{
values.Add(Wrap(obj));
}
}
jsonValue = new ArrayJsonValue(values.ToArray());
break;
case FieldDataType.Bool:
jsonValue = new BooleanJsonValue((bool)value);
break;
case FieldDataType.DateTime:
jsonValue = new DateTimeJsonValue((DateTime)value);
break;
case FieldDataType.Null:
jsonValue = new NullValue();
break;
case FieldDataType.Number:
jsonValue = new NumberJsonValue(value);
break;
case FieldDataType.Object:
if (value.GetType() == typeof(JArray))
{
var arr = (JArray)value;
var vals = new List <IJsonValue>();
foreach (var obj in arr)
{
vals.Add(Wrap(obj));
}
jsonValue = new ArrayJsonValue(vals.ToArray());
}
else if (value.GetType() == typeof(IJsonValue[]))
{
var arr = (IJsonValue[])value;
//var vals = new List<IJsonValue>();
//foreach (var obj in arr)
//{
// vals.Add(Wrap(obj));
//}
jsonValue = new ArrayJsonValue(arr); //vals.ToArray());
}
else
{
jsonValue = new ObjectJsonValue(Serialize(value));
}
break;
case FieldDataType.String:
jsonValue = new StringJsonValue((string)value);
break;
}
return(jsonValue);
}
