public TResult Execute <TResult>(Expression expression)
{
var itemType = TypeHelper.GetElementType(expression.Type);
var translator = new ExpressionToFTSRequestTranslator();
var queryString = translator.TranslateAnd(expression);
return((TResult)(e3sClient.SearchFTS(itemType, queryString)));
}
protected override Expression VisitBinary(BinaryExpression node)
{
Expression nodeLeft = node.Left;
Expression nodeRight = node.Right;
switch (node.NodeType)
{
case ExpressionType.Equal:
if (nodeLeft.NodeType != ExpressionType.MemberAccess)
{
nodeLeft = node.Right;
nodeRight = node.Left;
}
if (nodeLeft.NodeType != ExpressionType.MemberAccess)
{
throw new NotSupportedException(string.Format("Left operand should be property or field", node.NodeType));
}
if (nodeRight.NodeType != ExpressionType.Constant)
{
throw new NotSupportedException(string.Format("Right operand should be constant", node.NodeType));
}
Visit(nodeLeft);
resultString.Append("(");
Visit(nodeRight);
resultString.Append(")");
break;
case ExpressionType.And:
case ExpressionType.AndAlso:
var leftTranslator = new ExpressionToFTSRequestTranslator();
var leftResult = leftTranslator.TranslateAnd(nodeLeft);
queries.AddRange(leftResult);
var rightTranslator = new ExpressionToFTSRequestTranslator();
var rightResult = rightTranslator.TranslateAnd(nodeRight);
queries.AddRange(rightResult);
break;
default:
throw new NotSupportedException(string.Format("Operation {0} is not supported", node.NodeType));
}
return(node);
}