Need help with BC4J/Struts application using a Stored Procedure

Question

Hi,
I am doing a proof of concept for a new project using JDeveloper, Struts and BC4J. We want to reuse our Business logic that is currently residing in Oracle Stored Procedures. I previously created a BC4J Entity Object based on a stored procedure Using Oracle Stored Procedures but this stored procedure is a bit different in that it returns a ref cursor as one of the paramters. http://radio.weblogs.com/0118231/stories/2003/03/03/gettingAViewObjectsResultRowsFromARefCursor.html
I tried the above method, but I am having some trouble with it. I keep getting the error ORA-01008: not all variables are bound when I test it using the AppModule tester.
Here is the store procedure definition:
CREATE OR REPLACE PACKAGE pprs_test_wrappers IS
TYPE sn_srch_results IS REF CURSOR;
PROCEDURE sn_srch_main_test
(serial_num_in IN OUT VARCHAR2
,serial_coll_cd_in IN OUT NUMBER
,max_rows_allowed IN OUT NUMBER
,total_rows_selected IN OUT NUMBER
,message_cd_out IN OUT VARCHAR2
,query_results          OUT sn_srch_results
END pprs_test_wrappers;
And here is my code:
package pprs;
import java.math.BigDecimal;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import oracle.jbo.JboException;
import oracle.jbo.domain.Number;
import oracle.jbo.server.DBTransaction;
import oracle.jbo.server.ViewObjectImpl;
import oracle.jbo.server.ViewRowImpl;
import oracle.jbo.server.ViewRowSetImpl;
import oracle.jdbc.driver.OracleCallableStatement;
import oracle.jdbc.driver.OracleTypes;
// --- File generated by Oracle Business Components for Java.
public class LienCheckImpl extends ViewObjectImpl
* This is the PLSQL block that we will execute to retrieve the REF CURSOR
private static final String SQL =
"begin ? := pprs_test_wrappers.sn_srch_main_test(?, ?, ?, ?, ?, ?);end;";
public LienCheckImpl() {}
* Overridden framework method.
* Executed when the framework needs to issue the database query for
* the query collection based on this view object. One view object
* can produce many related result sets, each potentially the result
* of different bind variable values. If the rowset in query is involved
* in a framework-coordinated master/detail viewlink, then the params array
* will contain one or more framework-supplied bind parameters. If there
* are any user-supplied bind parameter values, they will PRECEED the
* framework-supplied bind variable values in the params array, and the
* number of user parameters will be indicated by the value of the
* numUserParams argument.
protected void executeQueryForCollection(Object qc,Object[] params,int numUserParams) {
* If there are where-clause params (for example due to a view link)
* they will be in the 'params' array.
* We assume that if some parameter is present, that it is a Deptno
* value to pass as an argument to the stored procedure.
* NOTE: Due to Bug#2828248 I have to cast to BigDecimal for now,
* ---- but this parameter value should be oracle.jbo.domain.Number type.
String serialNumIn = null;
BigDecimal serialCollCdIn = null;
BigDecimal maxRowsAllowed = null;
BigDecimal totalRowsSelected = null;
String messageCdOut = null;
if (params != null) {
serialNumIn = (String)params[0];
serialCollCdIn = (BigDecimal)params[1];
maxRowsAllowed = (BigDecimal)params[2];
totalRowsSelected = (BigDecimal)params[3];
messageCdOut = (String)params[4];
storeNewResultSet(qc,retrieveRefCursor(qc,serialNumIn,
serialCollCdIn,
maxRowsAllowed,
totalRowsSelected,
messageCdOut));
super.executeQueryForCollection(qc, params, numUserParams);
* Overridden framework method.
* Wipe out all traces of a built-in query for this VO
protected void create() {
getViewDef().setQuery(null);
getViewDef().setSelectClause(null);
setQuery(null);
* Overridden framework method.
* The role of this method is to "fetch", populate, and return a single row
* from the datasource by calling createNewRowForCollection() and populating
* its attributes using populateAttributeForRow().
protected ViewRowImpl createRowFromResultSet(Object qc, ResultSet rs) {
* We ignore the JDBC ResultSet passed by the framework (null anyway) and
* use the resultset that we've stored in the query-collection-private
* user data storage
rs = getResultSet(qc);
* Create a new row to populate
ViewRowImpl r = createNewRowForCollection(qc);
try {
* Populate new row by attribute slot number for current row in Result Set
populateAttributeForRow(r,0, nullOrNewNumber(rs.getBigDecimal(1)));
populateAttributeForRow(r,1, nullOrNewNumber(rs.getBigDecimal(2)));
populateAttributeForRow(r,2, rs.getString(3));
populateAttributeForRow(r,3, rs.getString(4));
populateAttributeForRow(r,4, rs.getString(5));
catch (SQLException s) {
throw new JboException(s);
return r;
* Overridden framework method.
* Return true if the datasource has at least one more record to fetch.
protected boolean hasNextForCollection(Object qc) {
ResultSet rs = getResultSet(qc);
boolean nextOne = false;
try {
nextOne = rs.next();
* When were at the end of the result set, mark the query collection
* as "FetchComplete".
if (!nextOne) {
setFetchCompleteForCollection(qc, true);
* Close the result set, we're done with it
rs.close();
catch (SQLException s) {
throw new JboException(s);
return nextOne;
* Overridden framework method.
* The framework gives us a chance to clean up any resources related
* to the datasource when a query collection is done being used.
protected void releaseUserDataForCollection(Object qc, Object rs) {
* Ignore the ResultSet passed in since we've created our own.
* Fetch the ResultSet from the User-Data context instead
ResultSet userDataRS = getResultSet(qc);
if (userDataRS != null) {
try {
userDataRS.close();
catch (SQLException s) {
/* Ignore */
super.releaseUserDataForCollection(qc, rs);
* Return a JDBC ResultSet representing the REF CURSOR return
* value from our stored package function.
private ResultSet retrieveRefCursor(Object qc,
String serialNum,
BigDecimal serialColCd,
BigDecimal maxRows,
BigDecimal totalRows,
String messageCd ) {
CallableStatement st = null;
try {
st = getDBTransaction().createCallableStatement(SQL,DBTransaction.DEFAULT);
* Register the first bind parameter as our return value of type CURSOR
st.registerOutParameter(1,OracleTypes.CURSOR);
* Set the value of the 2nd bind variable to pass id as argument
if (serialNum == null) st.setNull(2,Types.CHAR);
else st.setString(2,serialNum);
if (serialColCd == null) st.setNull(3,Types.NUMERIC);
else st.setBigDecimal(3,serialColCd);
if (maxRows == null) st.setNull(4,Types.NUMERIC);
else st.setBigDecimal(4,maxRows);
if (totalRows == null) st.setNull(5,Types.NUMERIC);
else st.setBigDecimal(5,totalRows);
if (messageCd == null) st.setNull(6,Types.CHAR);
else st.setString(6,messageCd);
st.execute();
ResultSet rs = ((OracleCallableStatement)st).getCursor(1);
* Make this result set use the fetch size from our View Object settings
rs.setFetchSize(getFetchSize());
return rs ;
catch (SQLException s) {
throw new JboException(s);
finally {try {st.close();} catch (SQLException s) {}}
* Store a new result set in the query-collection-private user-data context
private void storeNewResultSet(Object qc, ResultSet rs) {
ResultSet existingRs = getResultSet(qc);
// If this query collection is getting reused, close out any previous rowset
if (existingRs != null) {
try {existingRs.close();} catch (SQLException s) {}
setUserDataForCollection(qc,rs);
hasNextForCollection(qc); // Prime the pump with the first row.
* Retrieve the result set wrapper from the query-collection user-data
private ResultSet getResultSet(Object qc) {
return (ResultSet)getUserDataForCollection(qc);
* Return either null or a new oracle.jbo.domain.Number
private static oracle.jbo.domain.Number nullOrNewNumber(BigDecimal b) {
try {
return b != null ? new oracle.jbo.domain.Number(b) : null;
catch (SQLException s) { }
return null;
I created the view object in expert mode so there is no entity object. Can someone help? I don't have much time left to finish this.
Also, could I have done this from the Entity object instead of the view object by registering the ref cursor OUT parameter in handleStoredProcInsert()?
Thanks
Natalie

Answer 1

I was able to get the input parameter by putting the following in my struts actions class
vo.setWhereClauseParam(0,request.getParameter("row0_SerialNum"));
The full code is:
package mypackage2;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import oracle.jbo.html.BC4JContext;
import oracle.jbo.ViewObject;
import oracle.jbo.html.struts11.BC4JUtils;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class LienCheckView1QueryAction extends Action
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
BC4JContext context = BC4JContext.getContext(request);
// Retrieve the view object instance to work with by name
ViewObject vo = context.getApplicationModule().findViewObject("LienCheckView1");
vo.setRangeSize(3);
vo.setIterMode(ViewObject.ITER_MODE_LAST_PAGE_PARTIAL);
// Do any additional VO setup here (e.g. setting bind parameter values)
vo.setWhereClauseParam(0,request.getParameter("row0_SerialNum"));
// default value for serialCollCd 1 is for Motor Vehicles
vo.setWhereClauseParam(1,new oracle.jbo.domain.Number(1));
// Default value for maxRows_allowed
vo.setWhereClauseParam(2,new oracle.jbo.domain.Number(20));
return BC4JUtils.getForwardFromContext(context, mapping);
This doesn't always work properly though. The first time I press the query button, the SerialNum parameter is still null, however if I re-execute the query by pressing the query button again. It will work, and return the rows. I always have to query twice. Also the SerialNum attribute is set to a String in my view object, it is a varchar column in the database, but some serial number I enter give a "Error Message: oracle.jbo.domain.Number ". This happens even though the underlying BC4J is returning values for the query. I also get a "500 Internal Server Error java.lang.ClassCastException: java.lang.String on my View object's code at line 65 which is
if (params.length>1) serialCollCdIn = (BigDecimal)params[1];
This is an input paramter to the oracle stored procedure that defaults to a Number value of 1.
Any idea what the problem is? Here is the full code for my view object:
package mypackage1;
import java.math.BigDecimal;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import oracle.jbo.JboException;
import oracle.jbo.domain.Number;
import oracle.jbo.server.DBTransaction;
import oracle.jbo.server.ViewObjectImpl;
import oracle.jbo.server.ViewRowImpl;
import oracle.jbo.server.ViewRowSetImpl;
import oracle.jdbc.driver.OracleCallableStatement;
import oracle.jdbc.driver.OracleTypes;
// --- File generated by Oracle Business Components for Java.
public class LienCheckViewImpl extends ViewObjectImpl
* This is the PLSQL block that we will execute to retrieve the REF CURSOR
private static final String SQL =
"begin pprs_test_wrappers.sn_srch_main_test(?, ?, ?, ?, ?, ?);end;";
private BigDecimal totalRows = null;
private String messageCd = null;
private BigDecimal serialColCd = null;
private BigDecimal maxRows = null;
public LienCheckViewImpl() {}
* Overridden framework method.
* Executed when the framework needs to issue the database query for
* the query collection based on this view object. One view object
* can produce many related result sets, each potentially the result
* of different bind variable values. If the rowset in query is involved
* in a framework-coordinated master/detail viewlink, then the params array
* will contain one or more framework-supplied bind parameters. If there
* are any user-supplied bind parameter values, they will *PRECEED* the
* framework-supplied bind variable values in the params array, and the
* number of user parameters will be indicated by the value of the
* numUserParams argument.
protected void executeQueryForCollection(Object qc,Object[] params,int numUserParams) {
* If there are where-clause params (for example due to a view link)
* they will be in the 'params' array.
* We assume that if some parameter is present, that it is a Deptno
* value to pass as an argument to the stored procedure.
* NOTE: Due to Bug#2828248 I have to cast to BigDecimal for now,
* ---- but this parameter value should be oracle.jbo.domain.Number type.
String serialNumIn = null;
BigDecimal serialCollCdIn = null;
BigDecimal maxRowsAllowed = null;
BigDecimal totalRowsSelected = null;
String messageCdOut = null;
if (params != null) {
if (params.length>0) serialNumIn = (String)params[0];
if (params.length>1) serialCollCdIn = (BigDecimal)params[1];
if (params.length>2) maxRowsAllowed = (BigDecimal)params[2];
storeNewResultSet(qc,retrieveRefCursor(qc,serialNumIn,
serialCollCdIn,
maxRowsAllowed));
super.executeQueryForCollection(qc, params, numUserParams);
* Overridden framework method.
* Wipe out all traces of a built-in query for this VO
protected void create() {
getViewDef().setQuery(null);
getViewDef().setSelectClause(null);
setQuery(null);
* Overridden framework method.
* The role of this method is to "fetch", populate, and return a single row
* from the datasource by calling createNewRowForCollection() and populating
* its attributes using populateAttributeForRow().
protected ViewRowImpl createRowFromResultSet(Object qc, ResultSet rs) {
* We ignore the JDBC ResultSet passed by the framework (null anyway) and
* use the resultset that we've stored in the query-collection-private
* user data storage
rs = getResultSet(qc);
* Create a new row to populate
ViewRowImpl r = createNewRowForCollection(qc);
try {
* Populate new row by attribute slot number for current row in Result Set
//AddedByRegisNum
populateAttributeForRow(r,0, nullOrNewNumber(rs.getBigDecimal(1)));
System.out.println("AddedByRegisNum :" + rs.getBigDecimal(1));
// OrigRegisNum
populateAttributeForRow(r,1, nullOrNewNumber(rs.getBigDecimal(2)));
System.out.println("OrigRegisNum :" + rs.getBigDecimal(2));
// SerialNum
populateAttributeForRow(r,2, rs.getString(3));
System.out.println("SerialNum :" + rs.getString(3));
// SerialNumDesc
populateAttributeForRow(r,3, rs.getString(4));
System.out.println("SerialNumDesc :" + rs.getString(4));
// FlagExactMatch
populateAttributeForRow(r,4, rs.getString(5));
System.out.println("FlagExactMatch :" + rs.getString(5));
// MessageCd
populateAttributeForRow(r,5, messageCd);
// TotalRows
populateAttributeForRow(r,6, totalRows);
catch (SQLException s) {
throw new JboException(s);
return r;
* Overridden framework method.
* Return true if the datasource has at least one more record to fetch.
protected boolean hasNextForCollection(Object qc) {
ResultSet rs = getResultSet(qc);
boolean nextOne = false;
try {
nextOne = rs.next();
* When were at the end of the result set, mark the query collection
* as "FetchComplete".
if (!nextOne) {
setFetchCompleteForCollection(qc, true);
* Close the result set, we're done with it
rs.close();
catch (SQLException s) {
throw new JboException(s);
return nextOne;
* Overridden framework method.
* The framework gives us a chance to clean up any resources related
* to the datasource when a query collection is done being used.
protected void releaseUserDataForCollection(Object qc, Object rs) {
* Ignore the ResultSet passed in since we've created our own.
* Fetch the ResultSet from the User-Data context instead
ResultSet userDataRS = getResultSet(qc);
if (userDataRS != null) {
try {
userDataRS.close();
catch (SQLException s) {
/* Ignore */
super.releaseUserDataForCollection(qc, rs);
* Overridden framework method
* Return the number of rows that would be returned by executing
* the query implied by the datasource. This gives the developer a
* chance to perform a fast count of the rows that would be retrieved
* if all rows were fetched from the database. In the default implementation
* the framework will perform a SELECT COUNT(*) FROM (...) wrapper query
* to let the database return the count. This count might only be an estimate
* depending on how resource-intensive it would be to actually count the rows.
public long getQueryHitCount(ViewRowSetImpl viewRowSet) {
Object[] params = viewRowSet.getParameters(true);
String serialNumIn = (String)params[0];
BigDecimal serialCollCdIn = (BigDecimal)params[1];
BigDecimal maxRowsAllowed = (BigDecimal)params[2];
CallableStatement st = null;
try {
st = getDBTransaction().createCallableStatement(SQL,DBTransaction.DEFAULT);
* Register the fourth bind parameter as our return value of type NUMERIC
st.registerOutParameter(4,Types.NUMERIC);
* Set the value of the 3 bind variables to pass as arguments
if (serialNumIn == null) st.setNull(1, Types.CHAR);
else st.setString(1,serialNumIn);
if (serialCollCdIn == null) st.setNull(2,Types.NUMERIC);
else st.setBigDecimal(2,serialCollCdIn);
if (maxRowsAllowed == null) st.setNull(3, Types.NUMERIC);
else st.setBigDecimal(3, maxRowsAllowed);
st.execute();
System.out.println("returning value of :" + st.getLong(4));
return st.getLong(4);
catch (SQLException s) {
throw new JboException(s);
finally {try {st.close();} catch (SQLException s) {}}
* Return a JDBC ResultSet representing the REF CURSOR return
* value from our stored package function.
private ResultSet retrieveRefCursor(Object qc,
String serialNum,
BigDecimal serialColCd,
BigDecimal maxRows) {
CallableStatement st = null;
try {
st = getDBTransaction().createCallableStatement(SQL,DBTransaction.DEFAULT);
* Set the value of the bind variables
System.out.println("SerialNumIn :" + serialNum);
if (serialNum == null) st.setNull(1,Types.CHAR);
else st.setString(1,serialNum);
if (serialColCd == null) st.setNull(2,Types.NUMERIC);
else st.setBigDecimal(2,serialColCd);
if (maxRows == null) st.setNull(3,Types.NUMERIC);
else st.setBigDecimal(3,maxRows);
st.registerOutParameter(1, Types.CHAR); // serialNum
st.registerOutParameter(2, Types.NUMERIC); // serialColCd
st.registerOutParameter(3, Types.NUMERIC); // maxRows
st.registerOutParameter(4, Types.NUMERIC); // totalRows
st.registerOutParameter(5, Types.CHAR); // messageCd
* Register the 6th bind parameter as our return value of type CURSOR
st.registerOutParameter(6,OracleTypes.CURSOR);
st.execute();
ResultSet rs = ((OracleCallableStatement)st).getCursor(6);
serialColCd = st.getBigDecimal(2);
System.out.println("SerialColCd= " + serialColCd);
maxRows = st.getBigDecimal(3);
System.out.println("maxRows= " + maxRows);
totalRows = st.getBigDecimal(4);
System.out.println("totalRows= " + totalRows);
messageCd = st.getString(5);
System.out.println("messageCd= " + messageCd);
* Make this result set use the fetch size from our View Object settings
rs.setFetchSize(getFetchSize());
return rs ;
catch (SQLException s) {
throw new JboException(s);
finally {try {st.close();} catch (SQLException s) {}}
* Store a new result set in the query-collection-private user-data context
private void storeNewResultSet(Object qc, ResultSet rs) {
ResultSet existingRs = getResultSet(qc);
// If this query collection is getting reused, close out any previous rowset
if (existingRs != null) {
try {existingRs.close();} catch (SQLException s) {}
setUserDataForCollection(qc,rs);
hasNextForCollection(qc); // Prime the pump with the first row.
* Retrieve the result set wrapper from the query-collection user-data
private ResultSet getResultSet(Object qc) {
return (ResultSet)getUserDataForCollection(qc);
* Return either null or a new oracle.jbo.domain.Number
private static oracle.jbo.domain.Number nullOrNewNumber(BigDecimal b) {
try {
return b != null ? new oracle.jbo.domain.Number(b) : null;
catch (SQLException s) { }
return null;
Natalie