Passing an array of beans to PL/SQL proc - can't quite figure it out

Question

Hi
I'm trying to pass in a Java array of beans to a PL/SQL proc and I can't quite get it to work. I did have the more simple case of an array of strings working but I'm stumped as to how to get this more complicated case to work.
I'm using Java 5 and Oracle 10.
My Oracle User Defined Types
create or replace type MY_OBJECT as object (
      id integer,
      join_table_name varchar(30)
create or replace type MY_OBJECT_ARRAY as table of MY_OBJECT;
My PL/SQL proc
create or replace package threshold is
  function validateThresholdSequence (
      thresholdSeqId integer,
      testValue number,
      testDate date,
      validationCriteria in MY_OBJECT_ARRAY
  ) return number;
end;
My Java
  public class ThresholdValidationCriteriaBean
    private String joinTableName = null;
    private Integer id = null;
    //Getters and setters...
  //Map my bean to the PL/SQL UDT - thought this might help but it seems not!
  Map<String, Class<?>> map = c.getTypeMap();
  map.put("MY_OBJECT", ThresholdValidationCriteriaBean.class);
  //Prepair my statement
  String sql=new String("{call threshold.validateThresholdSequence(?,?,?,?) }");
  ps= c.prepareStatement(sql);
  // Set the values to insert
  ps.setInt(1, thresholdSequenceId);
  ps.setDouble(2, testValue);
  ps.setDate(3, new java.sql.Date(date.getTime()));
  //Sort out the array thing
  ArrayDescriptor desc = ArrayDescriptor.createDescriptor("MY_OBJECT_ARRAY", c);
  ThresholdValidationCriteriaBean[] beanArray = new ThresholdValidationCriteriaBean[validationCriteria.size()];
  validationCriteria.toArray(beanArray);
  ARRAY array = new ARRAY (desc, c, beanArray);
  ((oracle.jdbc.driver.OraclePreparedStatement)ps).setARRAY(4, array); When I run this I get the following error on the creation of the ARRAY object
java.sql.SQLException: Fail to convert to internal representation: uk.co.cartesian.ascertain.imm.threshold.ThresholdValidationCriteriaBean@15c7850
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
     at oracle.jdbc.oracore.OracleTypeADT.toDatum(OracleTypeADT.java:239)
     at oracle.jdbc.oracore.OracleTypeADT.toDatumArray(OracleTypeADT.java:274)
     at oracle.jdbc.oracore.OracleTypeUPT.toDatumArray(OracleTypeUPT.java:115)
     at oracle.sql.ArrayDescriptor.toOracleArray(ArrayDescriptor.java:1314)
     at oracle.sql.ARRAY.<init>(ARRAY.java:152)I've spent most of the day so far going from one error to the next - but I seem to be stuck now.
Any help or hints very much appreciated
Cheers
Ian
Edited by: Yanis on Feb 28, 2008 12:12 PM

Answer 1

I've found the answer - I'll put the code here so everyone else can see what seems to work for me
First off the object that is being passed into the array needs to implement a couple of interfaces and so becomes
public class ThresholdValidationCriteriaBean
implements SQLData, Serializable
    private String joinTableName = null;
    private Integer id = null;
    //Getters and Setters
    public String getSQLTypeName()
    throws SQLException
        return "MY_OBJECT";
    public void readSQL(SQLInput stream, String typeName)
        //No need to implement this
    public void writeSQL(SQLOutput stream)
        //No need to implement this
}The code that I used to call the PL/SQL procedure with an array of MY_OBJECT's is
            //Sort out our array stuff
            ArrayDescriptor desc = ArrayDescriptor.createDescriptor("MY_OBJECT_ARRAY", c);
            ThresholdValidationCriteriaBean[] ba = new ThresholdValidationCriteriaBean[validationCriteria.size()];
            //Populate array
            ARRAY arrayToPass = new ARRAY (desc, c, ba);
            //Create our statement
            String sql = new String("{call ? := threshold.validateThresholdSequence(?,?,?,?) }");
            ps = c.prepareCall(sql);
            //Register our out parameter
            ((oracle.jdbc.OracleCallableStatement)ps).registerOutParameter(1, Types.INTEGER);
            // Set the values to insert
            ps.setInt(2, thresholdSequenceId);
            ps.setDouble(3, testValue);
            ps.setDate(4, new java.sql.Date(date.getTime()));
            ((oracle.jdbc.driver.OraclePreparedStatement)ps).setARRAY(5, arrayToPass);
            //Execute call to PL/SQL
            ps.execute(); Edited by: Yanis on 10-Mar-2008 13:17