private void VisitEqual(BinaryExpressionHandler node)
{
if (node.HasPropertyExpression && node.PropertyExpression.Expression.NodeType == ExpressionType.Parameter)
{
var name = node.PropertyExpression.Member.Name;
var value = EvalValue(node.ValueExpression);
Query = new QueryContainer(new TermQuery()
{
Field = name, Value = value
});
return;
}
throw new NotSupportedException("Not support this expression：" + node);
}
private void VisitLessThanOrEqual(BinaryExpressionHandler node, bool containEqual = false)
{
if (node.HasPropertyExpression && node.PropertyExpression.Expression.NodeType == ExpressionType.Parameter)
{
var name = node.PropertyExpression.Member.Name;
dynamic value = EvalValue(node.ValueExpression);
if (node.IsRight)
{
Query = GreaterThanOrEqual(name, value, containEqual);
}
else
{
Query = LowerThanOrEqual(name, value, containEqual);
}
}
}
protected override Expression VisitBinary(BinaryExpression node)
{
var handler = new BinaryExpressionHandler(node);
switch (node.NodeType)
{
case ExpressionType.And:
case ExpressionType.AndAlso:
VisitAnd(node);
break;
case ExpressionType.Or:
case ExpressionType.OrElse:
VisitOr(node);
break;
case ExpressionType.Equal:
VisitEqual(handler);
break;
case ExpressionType.NotEqual:
VisitNotEqual(handler);
break;
case ExpressionType.LessThan:
VisitLessThanOrEqual(handler);
break;
case ExpressionType.LessThanOrEqual:
VisitLessThanOrEqual(handler, true);
break;
case ExpressionType.GreaterThan:
VisitGreaterThanOrEqual(handler);
break;
case ExpressionType.GreaterThanOrEqual:
VisitGreaterThanOrEqual(handler, true);
break;
default:
throw new NotSupportedException(string.Format("The binary operator ‘{0}’ is not supported", node.NodeType));
}
return(node);
}