Create Custom Resolve function

[Former Member]

Hi All,

I am referring below link to create custom resolve(). my requirement is I have to take 5 attributes of one canonicalItem and perform some operations on it to create value for category attribute of product target file. But I am not getting how to get/fetch value of these 5 attribute in custom resolve ?and how to use custom resolve in transportexpression of target file?

Can anyone provide sample code for the same?

link text

[Former Member]

Do you guys have any suggestion ?

Regards, Rasika

[Former Member · Accepted solution]

Long back I have created custom resolver to fetch promotion description. It may help for you

usage will be like below inside target xml :

 <attribute>
     <name>description</name>
     <collection>false</collection>
     <transformationExpression>determinePromotionDescription(baseproductID,productID)</transformationExpression>
     <exportCode>description</exportCode>
 </attribute>

• we can pass number of parameters to this method

• Create java class by implements MethodResolver, MethodExecutor

• there are two method to over ride "resolve" and "execute"

           public class DeterminePromotionDescription implements MethodResolver, MethodExecutor
           {
               protected CanonicalItemService canonicalItemService;
               protected DataHubFeedService feedService;
               protected DataItemService dataItemService;
               protected static final String METHOD_NAME = "determinePromotionDescription";
               protected static final TypedValue IGNORE = new TypedValue("<ignore>");
               protected static final TypedValue EMPTY = new TypedValue("");
           @Override
           public MethodExecutor resolve(final EvaluationContext ec, final Object target, final String method,
                   final List<TypeDescriptor> argumentTypes) throws AccessException
           {
               if (!METHOD_NAME.equals(method))
               {
                   return null;
               }
               if (!(target instanceof CanonicalCustomProductFixedPricePromotion))
               {
                   return null;
               }
               return this;
           }
       
           @Override
           public TypedValue execute(final EvaluationContext ec, final Object target, final Object... args) throws AccessException
           {
               final DataHubPool pool = feedService.findPoolByName("GLOBAL");
               String baseProduct = (String)args[0];
               String productId = (String)args[1];
               //here your logic goes
               final Object promotionDesc =  "";
               return new TypedValue(promotionDesc);
           }
       }
  
  
  

  • I didn't add getter and setter methods above code

  • Register class in datahub extensions spring file

       <bean id="determinePromotionDescription" class="com.datahub.impl.DeterminePromotionDescription">
             <property name="canonicalItemService" ref="canonicalItemService"></property>        
             <property name="dataItemService" ref="dataItemService" />
             <property name="feedService" ref="dataHubFeedService" />
         </bean>
    
    

[Former Member · Accepted solution]

@kiranKumar,

Thanks for your reply. from above code if (!(target instanceof CanonicalCustomProductFixedPricePromotion)) please clarify "CanonicalCustomProductFixedPricePromotion" is the name of canonicalItem ? Code line: public TypedValue execute(final EvaluationContext ec, final Object target, final Object... args)

please clarify "args" contains canonical attributes?

[Former Member · Accepted solution]

CanonicalCustomProductFixedPricePromotion is the canonical item from which target is populating .

args contains the parameters that we are passing from transformation expression method. You can pass as many parameters you needs (from canonical item attributes).

determinePromotionDescription(baseproductID,productID)

[Former Member · Accepted solution]

when I am getting error at if (!(target instanceof CanonicalProductSales)) like can not resolve CanonicalProductSales to a type. Do I need to import any thing for this?

Regards, Rasika

[Former Member · Accepted solution]

The sample code I have given from earlier version, that time we had models for each canonical types. See the attachment for 6.x version code sample. Even you can remove that check.

link text

[Former Member · Accepted solution]

I am getting below error.my custom target extension spring.xml contains below code.

 </bean>

Any suggestion how to resolve it?link text

[Former Member · Accepted solution]

Try to add dependency to sapidocintegration in your custom datahub xml file

[Former Member · Accepted solution]

sapidocintegration is already their, in my custom resolver I am trying to extend standard category resolver defualtcaterogy.class ,so do I need to add any thing in my custom extension as it is depend on standard defualtcaterogy.class? I just have added import com.hybris.datahub.saperpproduct.publication.DetermineSupercategories;