Beginner CORBA idl struct said to be abstract class

Question

How do I instantiate a class declared in my .idl file for use by the methods implementing the interface?
I want to return an array of Record objects in my CORBA implentation, and my .idl file has:  struct Record
    long recordNumber;
    string firstName;
    string lastName;
    string streetAddress;
    string city;
    string country;
    string phone;
    string eMail;
    string fax;
     typedef sequence <Record> recordSet;
  interface AddRecord
    void setUser(in string user);
    string getUser();
        recordSet getRecords();
// plus more stuffWhen my implementing class in the server tries to define the getRecords() method like so:  public Record[] getRecords()
    Record r = null;
    Record[] allRecs;
    int index = 0;
    String selectAll = "SELECT * FROM Record ORDER BY Record_number";
    try
      Statement s = connection.createStatement();
      ResultSet recs = s.executeQuery(selectAll);
      while(recs.next())
        index++;
      allRecs = new Record[index];
//plus more stuffthe compiler complains
C:\My Documents\Java\CIS 290\hw5\RecordObj.java:178: Record is abstract; cannot be instantiated
r = new Record();
I went into the Record.java that the idlj compiler generated, and it is a final, non-abstract class. What incantation do I need here?

Answer 1

Whoops; solved that one; the real question is this: My .idl file declares some methods that I want to call in my implementation, but the .java class generated by the idlj compiler doesn't show the methods. Here's the full idl:module hw5Corba
typedef sequence <string> columns;
  struct Record
    long recordNumber;
    string firstName;
    string lastName;
    string streetAddress;
    string city;
    string country;
    string phone;
    string eMail;
    string fax;
   typedef sequence <Record> recordSet;
  interface AddRecord
   void setUser(in string user);
    string getUser();
   recordSet getRecords();
    columns getColumnNames(in string user);
    void newRecord(in Record r);
    void deleteRecord(in long num);
    void updateRecord(in Record r);
    void setRecordNumber(in long num);
    long getRecordNumber();
    void setFirstName(in string first);
    string getFirstName();
    void setLastName(in string last);
    string getLastName();
    void setStreetAddr(in string add);
    string getStreetAddr();
    void setCity(in string city);
    string getCity();
    void setCountry(in string country);
    string getCountry();
    void setEmail(in string email);
    string getEmail();
    void setPhone(in string phone);
    string getPhone();
    void setFax(in string fax);
    string getFax();
};Here's the method I expect to be able to implement:  public Record[] getRecords()
    Record r = null;
    Record[] allRecs;
    int index = 0;
    String selectAll = "SELECT * FROM Record ORDER BY Record_number";
    try
      Statement s = connection.createStatement();
      ResultSet recs = s.executeQuery(selectAll);
      while(recs.next())
        index++;
      allRecs = new Record[index];
      //cycle through records again, adding each
      //to the array
      index = 0;
      recs = s.executeQuery(selectAll);
      while(recs.next())
        r = new Record();
        r.setRecordNumber(recs.getInt(1));
        r.setFirstName(recs.getString(2));
        r.setLastName(recs.getString(3));
        r.setStreetAddr(recs.getString(4));
        r.setCity(recs.getString(5));
        r.setCountry(recs.getString(6));
        r.setEmail(recs.getString(7));
        r.setPhone(recs.getString(8));
        r.setFax(recs.getString(9));
        allRecs[index] = r;
      catch (SQLException ex)
        exceptionCode(ex);
    return allRecs;
  }The compiler error lists the 9 sub-methods as "can't resolve symbol", because as the Record.java file generated by the idlj shows, the methods aren't there:package hw5Corba;
* hw5Corba/Record.java
* Generated by the IDL-to-Java compiler (portable), version "3.0"
* from Record.idl
* Tuesday, November 20, 2001 10:08:15 PM CST
public final class Record implements org.omg.CORBA.portable.IDLEntity
  public int recordNumber = (int)0;
  public String firstName = null;
  public String lastName = null;
  public String streetAddress = null;
  public String city = null;
  public String country = null;
  public String phone = null;
  public String eMail = null;
  public String fax = null;
  public Record ()
  } // ctor
  public Record (int _recordNumber,
String _firstName, String _lastName,
String _streetAddress, String _city,
String _country, String _phone,
String _eMail, String _fax)
    recordNumber = _recordNumber;
    firstName = _firstName;
    lastName = _lastName;
    streetAddress = _streetAddress;
    city = _city;
    country = _country;
    phone = _phone;
    eMail = _eMail;
    fax = _fax;
  } // ctor
} // class Record What do I need to do to implement these methods declared in the .idl file?