public with sharing class GetServiceTagValidation {
public class ServicetagOutput{
@InvocableVariable(required=true)
public String sServiceTagValidated;
}
public class ServicetagInput{
@InvocableVariable(required=true)
public String sServiceTag;
}
@InvocableMethod(label='Validate Service Tag')
public static List<ServicetagOutput> getOrderStatus(List<ServicetagInput> servicetagInputs)
{
Set<String> servicetagnumber = new Set<String>();
for (ServicetagInput servicetagInput : servicetagInputs)
servicetagnumber.add(servicetagInput.sServiceTag);
Map<String, String> mapNameStatus = new Map<String, String>();
List<Asset> orders = [SELECT Name, Kb__c FROM Asset where Name in :servicetagnumber ];
if (orders.size()>0)
{
for (Asset order : orders)
mapNameStatus.put(order.Name, order.Kb__c);
}

List<ServicetagOutput> servicetagOutputs = new List<ServicetagOutput>();
for (ServicetagInput servicetagInput : servicetagInputs)
{
ServicetagOutput servicetagOutput = new ServicetagOutput();
servicetagOutput.sServiceTagValidated = mapNameStatus.get(servicetagInput.sServiceTag);
servicetagOutputs.add(servicetagOutput);
    system.debug('checking'+servicetagOutputs);
}
return servicetagOutputs;
}
}