private Term CustomUnaryExpressionConverter(
UnaryExpression expr, DefaultExpressionConverterFactory.RecursiveMapDelegate recursiveMap,
IDatumConverterFactory datumConverterFactory, IExpressionConverterFactory expressionConverterFactory)
{
return(new Term()
{
type = Term.TermType.DATUM,
datum = new Datum()
{
type = Datum.DatumType.R_STR,
r_str = "Woot woot!",
}
});
}
public static Term ConvertAppendToTerm(MethodCallExpression methodCall, DefaultExpressionConverterFactory.RecursiveMapDelegate recursiveMap, IDatumConverterFactory datumConverterFactory, IExpressionConverterFactory expressionConverterFactory)
{
var target = methodCall.Arguments[0];
var appendArray = methodCall.Arguments[1];
IEnumerable <Expression> appendExpressions;
if (appendArray.NodeType == ExpressionType.NewArrayInit)
{
appendExpressions = ((NewArrayExpression)appendArray).Expressions;
}
else if (appendArray.NodeType == ExpressionType.MemberAccess)
{
var memberExpression = (MemberExpression)appendArray;
if (!memberExpression.Type.IsArray)
{
throw new NotSupportedException(String.Format("Expected second arg to ReQLExpression.Append to be an array, but was: {0}", memberExpression.Type));
}
var array = (IEnumerable)Expression.Lambda(memberExpression).Compile().DynamicInvoke();
var items = array as object[] ?? array.Cast <object>().ToArray();
appendExpressions = items.Select(item => Expression.Constant(item));
}
else
{
throw new NotSupportedException(String.Format("Expected second arg to ReQLExpression.Append to be NewArrayInit or MemberAccess, but was: {0}", appendArray.NodeType));
}
var term = recursiveMap(target);
foreach (var datumExpression in appendExpressions)
{
var newTerm = new Term()
{
type = Term.TermType.APPEND
};
newTerm.args.Add(term);
newTerm.args.Add(recursiveMap(datumExpression));
term = newTerm;
}
return(term);
}
public static Term ConvertAppendToTerm(MethodCallExpression methodCall, DefaultExpressionConverterFactory.RecursiveMapDelegate recursiveMap, IDatumConverterFactory datumConverterFactory, IExpressionConverterFactory expressionConverterFactory)
{
var target = methodCall.Arguments[0];
var appendArray = methodCall.Arguments[1];
if (appendArray.NodeType != ExpressionType.NewArrayInit)
{
throw new NotSupportedException(String.Format("Expected second arg to ReQLExpression.Append to be NewArrayInit, but was: {0}", appendArray.NodeType));
}
var newArrayExpression = (NewArrayExpression)appendArray;
var term = recursiveMap(target);
foreach (var datumExpression in newArrayExpression.Expressions)
{
var newTerm = new Term()
{
type = Term.TermType.APPEND
};
newTerm.args.Add(term);
if (datumExpression.NodeType == ExpressionType.MemberInit)
{
var memberInit = (MemberInitExpression)datumExpression;
newTerm.args.Add(recursiveMap(memberInit));
}
else
{
throw new NotSupportedException(String.Format("Expected ReQLExpression.Append to contain MemberInit additions, but was: {0}", datumExpression.NodeType));
}
term = newTerm;
}
return(term);
}
public static Term ConvertEnumerableAnyToTerm(MethodCallExpression methodCall, DefaultExpressionConverterFactory.RecursiveMapDelegate recursiveMap, IDatumConverterFactory datumConverterFactory, IExpressionConverterFactory expressionConverterFactory)
{
var target = methodCall.Arguments[0];
var predicate = methodCall.Arguments[1];
var filterTerm = new Term()
{
type = Term.TermType.CONTAINS
};
filterTerm.args.Add(recursiveMap(target));
var enumerableElementType = methodCall.Method.GetGenericArguments()[0];
var createFunctionTermMethod = typeof(ExpressionUtils)
.GetMethods(BindingFlags.Public | BindingFlags.Static)
.Single(m => m.Name == "CreateFunctionTerm" && m.GetGenericArguments().Length == 2);
createFunctionTermMethod = createFunctionTermMethod.MakeGenericMethod(enumerableElementType, typeof(bool));
var functionTerm = (Term)createFunctionTermMethod.Invoke(null, new object[] { new QueryConverter(datumConverterFactory, expressionConverterFactory), predicate });
filterTerm.args.Add(functionTerm);
return(filterTerm);
}
