How to use QueryNodeVisitor to parse odata $filter for boolean entity type












0















I am wondering how we can use QueryNodeVisitor to parse odata FilterClause for Boolean type. For example,



/api/items?$filter=value eq true



/api/items?$filter=value



From what I tested, both of the above are valid from odata. While the generic QueryNodeVisitor seems to be only working the first case. Any suggestions how to make the second one work too?



Thanks!










share|improve this question





























    0















    I am wondering how we can use QueryNodeVisitor to parse odata FilterClause for Boolean type. For example,



    /api/items?$filter=value eq true



    /api/items?$filter=value



    From what I tested, both of the above are valid from odata. While the generic QueryNodeVisitor seems to be only working the first case. Any suggestions how to make the second one work too?



    Thanks!










    share|improve this question



























      0












      0








      0








      I am wondering how we can use QueryNodeVisitor to parse odata FilterClause for Boolean type. For example,



      /api/items?$filter=value eq true



      /api/items?$filter=value



      From what I tested, both of the above are valid from odata. While the generic QueryNodeVisitor seems to be only working the first case. Any suggestions how to make the second one work too?



      Thanks!










      share|improve this question
















      I am wondering how we can use QueryNodeVisitor to parse odata FilterClause for Boolean type. For example,



      /api/items?$filter=value eq true



      /api/items?$filter=value



      From what I tested, both of the above are valid from odata. While the generic QueryNodeVisitor seems to be only working the first case. Any suggestions how to make the second one work too?



      Thanks!







      c# parsing odata






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      edited Jan 3 at 7:19







      katrinawyh

















      asked Jan 2 at 23:25









      katrinawyhkatrinawyh

      11




      11
























          1 Answer
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          QueryNodeVisitor<T> is a generic class, all the methods are defined to throw NotImplementedException.



          Would you please share more about "the generic QueryNodeVisitor seems to be only working the first case"?



          Beside, I think you can create your own visitor, similar to:



          public class BooleanVisitor : QueryNodeVisitor<bool>
          {
          public override bool Visit(SingleValuePropertyAccessNode propertyNode)
          {
          if (propertyNode == null)
          {
          return false;
          }

          return propertyNode.TypeReference.IsBoolean();
          }





          share|improve this answer
























          • Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

            – katrinawyh
            Jan 3 at 22:13












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          1 Answer
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          1 Answer
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          active

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          active

          oldest

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          0














          QueryNodeVisitor<T> is a generic class, all the methods are defined to throw NotImplementedException.



          Would you please share more about "the generic QueryNodeVisitor seems to be only working the first case"?



          Beside, I think you can create your own visitor, similar to:



          public class BooleanVisitor : QueryNodeVisitor<bool>
          {
          public override bool Visit(SingleValuePropertyAccessNode propertyNode)
          {
          if (propertyNode == null)
          {
          return false;
          }

          return propertyNode.TypeReference.IsBoolean();
          }





          share|improve this answer
























          • Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

            – katrinawyh
            Jan 3 at 22:13
















          0














          QueryNodeVisitor<T> is a generic class, all the methods are defined to throw NotImplementedException.



          Would you please share more about "the generic QueryNodeVisitor seems to be only working the first case"?



          Beside, I think you can create your own visitor, similar to:



          public class BooleanVisitor : QueryNodeVisitor<bool>
          {
          public override bool Visit(SingleValuePropertyAccessNode propertyNode)
          {
          if (propertyNode == null)
          {
          return false;
          }

          return propertyNode.TypeReference.IsBoolean();
          }





          share|improve this answer
























          • Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

            – katrinawyh
            Jan 3 at 22:13














          0












          0








          0







          QueryNodeVisitor<T> is a generic class, all the methods are defined to throw NotImplementedException.



          Would you please share more about "the generic QueryNodeVisitor seems to be only working the first case"?



          Beside, I think you can create your own visitor, similar to:



          public class BooleanVisitor : QueryNodeVisitor<bool>
          {
          public override bool Visit(SingleValuePropertyAccessNode propertyNode)
          {
          if (propertyNode == null)
          {
          return false;
          }

          return propertyNode.TypeReference.IsBoolean();
          }





          share|improve this answer













          QueryNodeVisitor<T> is a generic class, all the methods are defined to throw NotImplementedException.



          Would you please share more about "the generic QueryNodeVisitor seems to be only working the first case"?



          Beside, I think you can create your own visitor, similar to:



          public class BooleanVisitor : QueryNodeVisitor<bool>
          {
          public override bool Visit(SingleValuePropertyAccessNode propertyNode)
          {
          if (propertyNode == null)
          {
          return false;
          }

          return propertyNode.TypeReference.IsBoolean();
          }






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Jan 3 at 18:35









          Sam XuSam Xu

          2,5181713




          2,5181713













          • Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

            – katrinawyh
            Jan 3 at 22:13



















          • Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

            – katrinawyh
            Jan 3 at 22:13

















          Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

          – katrinawyh
          Jan 3 at 22:13





          Yes, I do have my own QueryNodeVisitor. I think the biggest difference from your example is that in my case "value" is passed in as a SingleValueOpenPropertyAccessNode instead of SingleValuePropertyAccessNode so there is no type information in the Node.

          – katrinawyh
          Jan 3 at 22:13




















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