AM Validation Exception - Deadline looming - Please help!

Question

Gurus,
I am trying to perform validation in AM against data already existing in underlying table. Since my EOImpl is utilizing API calls for insert/update/delete with OAPlsqlEntityImpl ... I cannot enforce uniqueness in EO attributes. Therefore, I am performing validation in AM and need to throw an exception message when duplication occurs.
I have documented my code and Null Pointer Exception message. The bolded code in PFR represents line "307" which is reference in the Null Pointer Exception. Any help would be greatly appreciated and rewarded.
Thanks!
PFR code:
public void processFormRequest(OAPageContext pageContext, OAWebBean webBean)
super.processFormRequest(pageContext, webBean);
OAApplicationModule am = pageContext.getApplicationModule(webBean);
// Pressing the "Apply" button means the transaction should be validated
// and committed.
if (pageContext.getParameter("Apply") != null)
OAViewObject vo = (OAViewObject)am.findViewObject("DesigFullVO1");
String DesignatorCode = (String)vo.getCurrentRow().getAttribute("DispCode");
*Serializable[] params = { DesignatorCode };*
am.invokeMethod("ValDesig",params);
am.invokeMethod("apply");
MessageToken[] tokens = { new MessageToken("DESIGNATOR",DesignatorCode)};
OAException confirmMessage = new OAException("AK", "SPL_CREATE_DESIGNATOR_W", tokens, OAException.CONFIRMATION, null);
OADialogPage dialogPage = new OADialogPage(OAException.CONFIRMATION,
confirmMessage,
null,
APPLICATION_JSP + "?page=/designator/oracle/apps/spl/hdrdef/webui/DesigSearchPG",
null);
dialogPage.setReusePageLayout(true);
pageContext.releaseRootApplicationModule();
pageContext.redirectToDialogPage(dialogPage);
pageContext.putDialogMessage(confirmMessage);
VO query:
select disp_code DISP_CODE
from spldat.spl_dispositions
AM code:
public void ValDesig(String dispCode)
DesigValidationVOImpl vo = getDesigValidationVO1();
DesigValidationVORowImpl Row = null;
String a = "disp_code = '"+dispCode+"'";
vo.setWhereClauseParams(null);
vo.setWhereClause(a);
vo.executeQuery();
String l_desig = Row.getDispCode();
if (l_desig != null)
*MessageToken[] errTokens = { new MessageToken("OBJECT_NAME", "DesigValidationVO1")};*
throw new OAException("AK", "FWK_TBX_OBJECT_NOT_FOUND", errTokens);
} // end ValDesig()
NullPointerException
oracle.apps.fnd.framework.OAException: java.lang.NullPointerException
     at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:891)
     at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:865)
     at oracle.apps.fnd.framework.OAException.wrapperInvocationTargetException(OAException.java:988)
     at oracle.apps.fnd.framework.server.OAUtility.invokeMethod(OAUtility.java:211)
     at oracle.apps.fnd.framework.server.OAUtility.invokeMethod(OAUtility.java:153)
     at oracle.apps.fnd.framework.server.OAApplicationModuleImpl.invokeMethod(OAApplicationModuleImpl.java:749)
     at designator.oracle.apps.spl.hdrdef.webui.DesigCreateCO.processFormRequest(DesigCreateCO.java:307)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequest(OAWebBeanHelper.java:804)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processFormRequest(OAWebBeanContainerHelper.java:363)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processFormRequest(OAPageLayoutHelper.java:1156)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processFormRequest(OAPageLayoutBean.java:1579)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:1000)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:966)

Answer 1

I'm getting a compilation error against the following code for the bolded line:
What is the best way to fix this type mismatch? I need to make sure that the result assigned to l_desig is the value returned from the VO.
AM Code:
public void ValDesig(String dispCode)
DesigValidationVOImpl vo = getDesigValidationVO1();
if (vo == null)
MessageToken[] errTokens = { new MessageToken("OBJECT_NAME", "DesigValidationVO1")};
throw new OAException("AK", "FWK_TBX_OBJECT_NOT_FOUND", errTokens);
String a = "disp_code = '"+dispCode;
vo.setWhereClauseParams(null);
vo.setWhereClause(a);
vo.executeQuery();
Row DesigValidationRow = getDesigValidationVO1().first();
String l_desig  = DesigValidationRow.getAttribute("DispCode");
if (l_desig != null)
MessageToken[] errTokens = { new MessageToken("OBJECT_NAME", "DesigValidationVO1")};
throw new OAException("AK", "FWK_TBX_OBJECT_NOT_FOUND", errTokens);
} // end ValDesig()
Error:
incompatible types; found java.lang.Object; required: java.lang.String
Edited by: sreese on Dec 1, 2010 11:04 AM