// public static methods
public static AstFilter Translate(TranslationContext context, MethodCallExpression expression)
{
if (StringExpressionToRegexFilterTranslator.CanTranslate(expression))
{
return(StringExpressionToRegexFilterTranslator.Translate(context, expression));
}
throw new ExpressionNotSupportedException(expression);
}
public static AstFilter Translate(TranslationContext context, MethodCallExpression expression)
{
if (StringExpressionToRegexFilterTranslator.CanTranslate(expression))
{
return(StringExpressionToRegexFilterTranslator.Translate(context, expression));
}
var method = expression.Method;
var arguments = expression.Arguments;
if (method.IsStatic &&
method.Name == "Contains" &&
method.ReturnType == typeof(bool) &&
arguments.Count == 2)
{
var sourceExpression = arguments[0];
var sourceType = sourceExpression.Type;
var itemExpression = arguments[1];
var itemType = itemExpression.Type;
if (TypeImplementsIEnumerable(sourceType, itemType))
{
return(Translate(context, expression, sourceExpression, itemExpression));
}
}
if (!method.IsStatic &&
method.Name == "Contains" &&
method.ReturnType == typeof(bool) &&
arguments.Count == 1)
{
var sourceExpression = expression.Object;
var sourceType = sourceExpression.Type;
var itemExpression = arguments[0];
var itemType = itemExpression.Type;
if (TypeImplementsIEnumerable(sourceType, itemType))
{
return(Translate(context, expression, sourceExpression, itemExpression));
}
}
throw new ExpressionNotSupportedException(expression);
}
private static AstFilter Translate(TranslationContext context, Expression expression, Expression expression1, Expression expression2)
{
Expression fieldExpression, valueExpression;
if (expression1.NodeType == ExpressionType.Constant && expression2.NodeType != ExpressionType.Constant)
{
(fieldExpression, valueExpression) = (expression2, expression1);
}
else
{
(fieldExpression, valueExpression) = (expression1, expression2);
}
if (StringExpressionToRegexFilterTranslator.TryTranslateComparisonExpression(context, expression, fieldExpression, AstComparisonFilterOperator.Eq, valueExpression, out var filter))
{
return(filter);
}
var field = ExpressionToFilterFieldTranslator.Translate(context, fieldExpression);
var value = valueExpression.GetConstantValue <object>(containingExpression: expression);
var serializedValue = SerializationHelper.SerializeValue(field.Serializer, value);
return(AstFilter.Eq(field, serializedValue));
}
