// When there is more than one property accessor, the last accessor needs to be taken out and added to the binary logical predicate.
// property(property(property operator value)
private static IPredicateVisitor CombinePredicates(IPredicateVisitor left, IPredicateVisitor right)
{
var containerLeft = (ContainerPredicateVisitor)left;
IPredicateVisitor parent = containerLeft;
if (parent == null)
{
return(new ContainerPredicateVisitor(right, left));
}
IPredicateVisitor innerContainer = right;
ContainerPredicateVisitor combinedContainer = null;
while (parent != null)
{
if (CanBeCombined(parent))
{
var container = (ContainerPredicateVisitor)parent;
innerContainer = new ContainerPredicateVisitor(innerContainer, container.Inner);
combinedContainer = new ContainerPredicateVisitor(innerContainer, container.Parent);
parent = container.Parent;
}
}
return(combinedContainer);
}
// When there is more than one property accessor, the last accessor needs to be taken out and added to the binary logical predicate.
// property(property(property operator value)
private static IPredicateVisitor CombinePredicates(IPredicateVisitor left, string operatorSign, IPredicateVisitor right)
{
var containerLeft = (ContainerPredicateVisitor)left;
IPredicateVisitor innerLeft = containerLeft.Inner;
BinaryPredicateVisitor binaryPredicateVisitor = new BinaryPredicateVisitor(innerLeft, operatorSign, right);
IPredicateVisitor parent = containerLeft.Parent;
if (parent == null)
{
return(new ContainerPredicateVisitor(binaryPredicateVisitor, null));
}
IPredicateVisitor innerContainer = binaryPredicateVisitor;
ContainerPredicateVisitor combinedContainer = null;
while (parent != null)
{
if (CanBeCombined(parent))
{
var container = (ContainerPredicateVisitor)parent;
innerContainer = new ContainerPredicateVisitor(innerContainer, container.Inner);
combinedContainer = new ContainerPredicateVisitor(innerContainer, container.Parent);
parent = container.Parent;
}
}
return(combinedContainer);
}
private static bool ArePropertiesEqual(ContainerPredicateVisitor left, ContainerPredicateVisitor right)
{
ConstantPredicateVisitor constantLeft = left.Parent as ConstantPredicateVisitor;
ConstantPredicateVisitor constantRight = right.Parent as ConstantPredicateVisitor;
if (constantLeft != null && constantRight != null)
{
return(constantLeft.Constant == constantRight.Constant);
}
return(false);
}
public IPredicateVisitor Convert(Expression expression, IPredicateVisitorFactory predicateVisitorFactory)
{
if (expression is MethodCallExpression methodCallExpression)
{
if (methodCallExpression.Object is MemberExpression memberExpression)
{
ContainerPredicateVisitor parentAccessor = predicateVisitorFactory.Create(memberExpression) as ContainerPredicateVisitor;
IPredicateVisitor constantPredicateVisitor = predicateVisitorFactory.Create(methodCallExpression.Arguments[0]);
return(new ContainerPredicateVisitor(RemoveQuotes(constantPredicateVisitor), parentAccessor));
}
}
return(null);
}
public IPredicateVisitor Convert(Expression expression, IPredicateVisitorFactory predicateVisitorFactory)
{
MethodCallExpression methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression == null)
{
return(null);
}
IPredicateVisitor inner = predicateVisitorFactory.Create(methodCallExpression.Arguments[0]);
IPredicateVisitor innerWithoutQuotes = RemoveQuotes(inner);
IPredicateVisitor parent = predicateVisitorFactory.Create(methodCallExpression.Object);
ContainerPredicateVisitor container = new ContainerPredicateVisitor(innerWithoutQuotes, parent);
return(container);
}
public IPredicateVisitor Convert(Expression expression, IPredicateVisitorFactory predicateVisitorFactory)
{
MethodCallExpression methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression == null)
{
return(null);
}
string methodName = this.AllowedMethods[methodCallExpression.Method.Name];
ConstantPredicateVisitor methodNameConstant = new ConstantPredicateVisitor(methodName);
IPredicateVisitor methodCaller = predicateVisitorFactory.Create(methodCallExpression.Arguments[0]);
IPredicateVisitor methodArguments = predicateVisitorFactory.Create(methodCallExpression.Arguments[1]);
ContainerPredicateVisitor container = new ContainerPredicateVisitor(methodArguments, methodNameConstant, true);
BinaryPredicateVisitor binary = new BinaryPredicateVisitor(methodCaller, string.Empty, container);
return(binary);
}
private static IPredicateVisitor CombinePredicateVisitors(IPredicateVisitor left, string operatorSign, IPredicateVisitor right)
{
IPredicateVisitor innerLeft = left;
IPredicateVisitor innerRight = right;
ContainerPredicateVisitor container = null;
while (innerLeft is ContainerPredicateVisitor containerLeft && innerRight is ContainerPredicateVisitor containerRight)
{
innerLeft = containerLeft.Inner;
innerRight = containerRight.Inner;
container = new ContainerPredicateVisitor(containerLeft.Parent, container);
}
if (innerLeft is BinaryPredicateVisitor binaryLeft && innerRight is BinaryPredicateVisitor binaryRight)
{
BinaryPredicateVisitor binaryPredicateVisitor = new BinaryPredicateVisitor(innerLeft, operatorSign, innerRight);
return(CombinePredicates(container, binaryPredicateVisitor));
}
return(null);
}
