reading a form value in EntityHome constructor - how??

[jerry426]

I have the following EntityHome constructor (part of this is obviously psuedocode):

public TicketList() { 
   if (theFormField > 0) {   
      EJBQL += " WHERE id IN (" + StringUtils.join(someMethod(theFormField), ",") + ")";  
   }
    
   setEjbql(EJBQL);
   setRestrictionExpressionStrings(Arrays.asList(RESTRICTIONS));
   setMaxResults(25);
}

I cannot figure out how to access theFormField from inside the constructor. Any suggestions? Or should I be doing this some other way?

[jerry426]

I meant to say EntityQuery, not EntityHome!

[jerry426]

I figured out a solution to my problem. I was trying to get access to a submitted form value in my EntityQuery constructor (which was originally created by seam-gen), however, every other way to do it I could find would not work in the constructor.

Perhaps there's a cleaner/better way to do this - but it's working well so I'm happy :-)

My relevant class level declarations:

// WHERE 1=1 is in here so we can simply append AND statements elsewhere in this class.
private String EJBQL = "SELECT ticket FROM Ticket ticket WHERE 1=1";

// this gives us direct access to the RequestParameterMap.
private Map<String, String> requestParameters = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap();

Then I made an override for getEjbql() like this:

@Override
public String getEjbql() {
          
   applyGroupFilter();
   applyDateRangeFilter();
   applyLocationFilter();
               
   return EJBQL;
          
}

then I can modify EJBQL:

private void applyGroupFilter() {
          
   List<String> groupList = someMethod(requestParameters.get("groupId"));

   // make sure the SQL is harmlessly valid if groupList is empty
   groupList.add("-1"); 

   // and add the list to the EJBQL
   EJBQL += " AND id IN (" + StringUtils.join(groupList, ",") + ")";
          
}

Now when the rest of the framework code executes, it will get the modified EJBQL value.