public void AndExpressionTest()
{
CompositeExpression compositeExpression = new CompositeExpression
{
Operator = QueryOperator.And,
Expressions = new List<QueryExpression>
{
new BooleanQueryExpression
{
Operator = QueryOperator.Exists,
Path = new List<PathFilter>
{
new FieldFilter
{
Name = "FirstName"
}
}
},
new BooleanQueryExpression
{
Operator = QueryOperator.Exists,
Path = new List<PathFilter>
{
new FieldFilter
{
Name = "LastName"
}
}
}
}
};
JObject o1 = new JObject
{
{"Title","Title!"},
{"FirstName", "FirstName!"},
{"LastName", "LastName!"}
};
Assert.True(compositeExpression.IsMatch(o1));
JObject o2 = new JObject
{
{"Title","Title!"},
{"FirstName", "FirstName!"}
};
Assert.False(compositeExpression.IsMatch(o2));
JObject o3 = new JObject
{
{"Title","Title!"}
};
Assert.False(compositeExpression.IsMatch(o3));
}
private QueryExpression ParseExpression()
{
QueryExpression rootExpression = null;
CompositeExpression parentExpression = null;
while (_currentIndex < _expression.Length)
{
EatWhitespace();
if (_expression[_currentIndex] != '@')
throw new JsonException("Unexpected character while parsing path query: " + _expression[_currentIndex]);
_currentIndex++;
List<PathFilter> expressionPath = new List<PathFilter>();
if (ParsePath(expressionPath, _currentIndex, true))
throw new JsonException("Path ended with open query.");
EatWhitespace();
EnsureLength("Path ended with open query.");
QueryOperator op;
object value = null;
if (_expression[_currentIndex] == ')'
|| _expression[_currentIndex] == '|'
|| _expression[_currentIndex] == '&')
{
op = QueryOperator.Exists;
}
else
{
op = ParseOperator();
EatWhitespace();
EnsureLength("Path ended with open query.");
value = ParseValue();
EatWhitespace();
EnsureLength("Path ended with open query.");
}
BooleanQueryExpression booleanExpression = new BooleanQueryExpression
{
Path = expressionPath,
Operator = op,
Value = (op != QueryOperator.Exists) ? new JValue(value) : null
};
if (_expression[_currentIndex] == ')')
{
if (parentExpression != null)
{
parentExpression.Expressions.Add(booleanExpression);
return rootExpression;
}
return booleanExpression;
}
if (_expression[_currentIndex] == '&' && Match("&&"))
{
if (parentExpression == null || parentExpression.Operator != QueryOperator.And)
{
CompositeExpression andExpression = new CompositeExpression { Operator = QueryOperator.And };
if (parentExpression != null)
parentExpression.Expressions.Add(andExpression);
parentExpression = andExpression;
if (rootExpression == null)
rootExpression = parentExpression;
}
parentExpression.Expressions.Add(booleanExpression);
}
if (_expression[_currentIndex] == '|' && Match("||"))
{
if (parentExpression == null || parentExpression.Operator != QueryOperator.Or)
{
CompositeExpression orExpression = new CompositeExpression { Operator = QueryOperator.Or };
if (parentExpression != null)
parentExpression.Expressions.Add(orExpression);
parentExpression = orExpression;
if (rootExpression == null)
rootExpression = parentExpression;
}
parentExpression.Expressions.Add(booleanExpression);
}
}
throw new JsonException("Path ended with open query.");
}