private static ExpressionModelMetadata CreateExpressionModelMetadata(ExpressionMetadataChainItem expressionMetadataChainItem, ExpressionMetadataChain chain)
{
var arguments = expressionMetadataChainItem.Expression.Arguments;
if (arguments.Count < 2 || !(arguments.Skip(1).First() is UnaryExpression unaryExpression))
{
return(new ExpressionModelMetadata()
{
Type = expressionMetadataChainItem.InputDtoType.Type
});
}
if (!(unaryExpression.Operand is LambdaExpression lambdaExpressionOperand))
{
throw new ArgumentException("Operand is not LambdaExpression");
}
var parameter = lambdaExpressionOperand.Parameters.First(x => x.Type == expressionMetadataChainItem.InputDtoType.Type);
return(new ExpressionModelMetadata()
{
Type = parameter.Type,
Name = parameter.Name
});
}
private static ExpressionMetadataChain ConvertExpressionToChain(Expression expression, ExpressionMetadataChain chain = null)
{
chain = chain ?? new ExpressionMetadataChain();
if (!(expression is MethodCallExpression methodCallExpression))
{
return(chain);
}
chain.Items.Insert(0, new ExpressionMetadataChainItem(methodCallExpression));
ConvertExpressionToChain(methodCallExpression.Arguments.First(), chain);
return(chain);
}
private static ExpressionMetadata CreateExpressionMetadata(ExpressionMetadataChainItem expressionMetadataChainItem, ExpressionMetadataChain chain)
{
var expressionModelMetadata = CreateExpressionModelMetadata(expressionMetadataChainItem, chain);
var response = ExpressionConverter.ConvertModelQueryExpression(expressionMetadataChainItem.Expression, expressionModelMetadata);
return(response);
}
