NullPointerException while uploading wrong file in af:inputfile

Question

Hi All,
I am uploading excel sheet data into jspx Page(database table) by using af:inputFile.After uploading file af:inputFile need to be refresh.It is getting refresh for right file(excel file),but it is not refreshing for wrong file upload.
it showing following error.
UIComponent is null
ADF_FACES-60097:For more information, please see the server's error log for an entry beginning with: ADF_FACES-60096:Server Exception during PPR, #2
i had refer frank's blog https://blogs.oracle.com/jdevotnharvest/entry/how_to_reset_adf_faces.
Could any one help on this!!
Thanks in advance!!

Answer 1

here is my jspx source code.
<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" xmlns:f="http://java.sun.com/jsf/core"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich" xmlns:h="http://java.sun.com/jsf/html">
<jsp:directive.page contentType="text/html;charset=UTF-8"/>
<f:view>
<af:document title="ExcelToTable.jspx" id="d1">
<af:messages id="m1"/>
<af:form id="f1" usesUpload="true">
<af:pageTemplate viewId="/oracle/templates/threeColumnTemplate.jspx" id="pt1">
<f:facet name="center">
<af:panelSplitter id="ps1" orientation="vertical" splitterPosition="146">
<f:facet name="first">
<af:panelFormLayout id="pfl2">
<af:panelLabelAndMessage label="#{bindings.Deptno.hints.label}" id="plam1">
<af:outputText value="#{bindings.Deptno.inputValue}" id="ot1">
<af:convertNumber groupingUsed="false" pattern="#{bindings.Deptno.format}"/>
</af:outputText>
</af:panelLabelAndMessage>
<af:panelLabelAndMessage label="#{bindings.Dname.hints.label}" id="plam2">
<af:outputText value="#{bindings.Dname.inputValue}" id="ot2"/>
</af:panelLabelAndMessage>
<af:panelLabelAndMessage label="#{bindings.Loc.hints.label}" id="plam3">
<af:outputText value="#{bindings.Loc.inputValue}" id="ot3"/>
</af:panelLabelAndMessage>
<f:facet name="footer">
<af:panelGroupLayout layout="vertical" id="pgl2">
<af:panelGroupLayout layout="horizontal" id="pgl3">
<f:facet name="separator">
<af:spacer width="10" height="1" id="s1"/>
</f:facet>
<af:commandButton actionListener="#{bindings.First.execute}"
text="First" disabled="#{!bindings.First.enabled}"
partialSubmit="true" id="cb1"/>
<af:commandButton actionListener="#{bindings.Previous.execute}"
text="Previous"
disabled="#{!bindings.Previous.enabled}"
partialSubmit="true" id="cb4"/>
<af:commandButton actionListener="#{bindings.Next.execute}" text="Next"
disabled="#{!bindings.Next.enabled}"
partialSubmit="true" id="cb5"/>
<af:commandButton actionListener="#{bindings.Last.execute}" text="Last"
disabled="#{!bindings.Last.enabled}"
partialSubmit="true" id="cb6"/>
</af:panelGroupLayout>
<af:commandButton text="Submit" id="cb7"/>
</af:panelGroupLayout>
</f:facet>
</af:panelFormLayout>
</f:facet>
<f:facet name="second">
<af:panelCollection id="pc1">
<f:facet name="menus"/>
<f:facet name="toolbar">
<af:toolbar id="t2">
<af:commandButton actionListener="#{bindings.CreateInsert.execute}"
text="InsertRow"
disabled="#{!bindings.CreateInsert.enabled}" id="cb2"
immediate="true"/>
<af:commandButton actionListener="#{bindings.Delete.execute}"
text="DeleteRow"
disabled="#{!bindings.Delete.enabled}" id="cb3"
immediate="true"/>
</af:toolbar>
</f:facet>
<f:facet name="statusbar"/>
<af:table value="#{bindings.EmpView3.collectionModel}" var="row"
rows="#{bindings.EmpView3.rangeSize}"
emptyText="#{bindings.EmpView3.viewable ? 'No data to display.' : 'Access Denied.'}"
fetchSize="#{bindings.EmpView3.rangeSize}" rowBandingInterval="0"
filterModel="#{bindings.EmpView3Query.queryDescriptor}"
queryListener="#{bindings.EmpView3Query.processQuery}"
filterVisible="true" varStatus="vs"
selectedRowKeys="#{bindings.EmpView3.collectionModel.selectedRow}"
selectionListener="#{bindings.EmpView3.collectionModel.makeCurrent}"
rowSelection="single" id="t1" partialTriggers="::cb2 ::cb3">
<af:column sortProperty="#{bindings.EmpView3.hints.Empno.name}"
filterable="true" sortable="true"
headerText="#{bindings.EmpView3.hints.Empno.label}" id="c1">
<af:inputText value="#{row.bindings.Empno.inputValue}"
label="#{bindings.EmpView3.hints.Empno.label}"
required="#{bindings.EmpView3.hints.Empno.mandatory}"
columns="#{bindings.EmpView3.hints.Empno.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Empno.precision}"
shortDesc="#{bindings.EmpView3.hints.Empno.tooltip}" id="it1">
<f:validator binding="#{row.bindings.Empno.validator}"/>
<af:convertNumber groupingUsed="false"
pattern="#{bindings.EmpView3.hints.Empno.format}"/>
</af:inputText>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Ename.name}"
filterable="true" sortable="true"
headerText="#{bindings.EmpView3.hints.Ename.label}" id="c2">
<af:inputText value="#{row.bindings.Ename.inputValue}"
label="#{bindings.EmpView3.hints.Ename.label}"
required="#{bindings.EmpView3.hints.Ename.mandatory}"
columns="#{bindings.EmpView3.hints.Ename.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Ename.precision}"
shortDesc="#{bindings.EmpView3.hints.Ename.tooltip}" id="it2">
<f:validator binding="#{row.bindings.Ename.validator}"/>
</af:inputText>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Job.name}" filterable="true"
sortable="true" headerText="#{bindings.EmpView3.hints.Job.label}"
id="c3">
<af:inputText value="#{row.bindings.Job.inputValue}"
label="#{bindings.EmpView3.hints.Job.label}"
required="#{bindings.EmpView3.hints.Job.mandatory}"
columns="#{bindings.EmpView3.hints.Job.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Job.precision}"
shortDesc="#{bindings.EmpView3.hints.Job.tooltip}" id="it3">
<f:validator binding="#{row.bindings.Job.validator}"/>
</af:inputText>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Mgr.name}" filterable="true"
sortable="true" headerText="#{bindings.EmpView3.hints.Mgr.label}"
id="c4">
<af:inputText value="#{row.bindings.Mgr.inputValue}"
label="#{bindings.EmpView3.hints.Mgr.label}"
required="#{bindings.EmpView3.hints.Mgr.mandatory}"
columns="#{bindings.EmpView3.hints.Mgr.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Mgr.precision}"
shortDesc="#{bindings.EmpView3.hints.Mgr.tooltip}" id="it4">
<f:validator binding="#{row.bindings.Mgr.validator}"/>
<af:convertNumber groupingUsed="false"
pattern="#{bindings.EmpView3.hints.Mgr.format}"/>
</af:inputText>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Hiredate.name}"
filterable="true" sortable="true"
headerText="#{bindings.EmpView3.hints.Hiredate.label}" id="c5">
<f:facet name="filter">
<af:inputDate value="#{vs.filterCriteria.Hiredate}" id="id1">
<af:convertDateTime pattern="#{bindings.EmpView3.hints.Hiredate.format}"/>
</af:inputDate>
</f:facet>
<af:inputDate value="#{row.bindings.Hiredate.inputValue}"
label="#{bindings.EmpView3.hints.Hiredate.label}"
required="#{bindings.EmpView3.hints.Hiredate.mandatory}"
columns="#{bindings.EmpView3.hints.Hiredate.displayWidth}"
shortDesc="#{bindings.EmpView3.hints.Hiredate.tooltip}"
id="id2">
<f:validator binding="#{row.bindings.Hiredate.validator}"/>
<af:convertDateTime pattern="#{bindings.EmpView3.hints.Hiredate.format}"/>
</af:inputDate>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Sal.name}" filterable="true"
sortable="true" headerText="#{bindings.EmpView3.hints.Sal.label}"
id="c6">
<af:inputText value="#{row.bindings.Sal.inputValue}"
label="#{bindings.EmpView3.hints.Sal.label}"
required="#{bindings.EmpView3.hints.Sal.mandatory}"
columns="#{bindings.EmpView3.hints.Sal.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Sal.precision}"
shortDesc="#{bindings.EmpView3.hints.Sal.tooltip}" id="it5">
<f:validator binding="#{row.bindings.Sal.validator}"/>
</af:inputText>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Comm.name}" filterable="true"
sortable="true" headerText="#{bindings.EmpView3.hints.Comm.label}"
id="c7">
<af:inputText value="#{row.bindings.Comm.inputValue}"
label="#{bindings.EmpView3.hints.Comm.label}"
required="#{bindings.EmpView3.hints.Comm.mandatory}"
columns="#{bindings.EmpView3.hints.Comm.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Comm.precision}"
shortDesc="#{bindings.EmpView3.hints.Comm.tooltip}" id="it6">
<f:validator binding="#{row.bindings.Comm.validator}"/>
</af:inputText>
</af:column>
<af:column sortProperty="#{bindings.EmpView3.hints.Deptno.name}"
filterable="true" sortable="true"
headerText="#{bindings.EmpView3.hints.Deptno.label}" id="c8">
<af:inputText value="#{row.bindings.Deptno.inputValue}"
label="#{bindings.EmpView3.hints.Deptno.label}"
required="#{bindings.EmpView3.hints.Deptno.mandatory}"
columns="#{bindings.EmpView3.hints.Deptno.displayWidth}"
maximumLength="#{bindings.EmpView3.hints.Deptno.precision}"
shortDesc="#{bindings.EmpView3.hints.Deptno.tooltip}"
id="it7">
<f:validator binding="#{row.bindings.Deptno.validator}"/>
<af:convertNumber groupingUsed="false"
pattern="#{bindings.EmpView3.hints.Deptno.format}"/>
</af:inputText>
</af:column>
</af:table>
</af:panelCollection>
</f:facet>
</af:panelSplitter>
</f:facet>
<f:facet name="header"/>
<f:facet name="start">
<af:panelGroupLayout id="pgl1">
<af:panelFormLayout id="pfl1">
<f:facet name="footer">
<af:commandButton text="Upload" id="uploadButton"
actionListener="#{FileProcessor.checkFile}" partialSubmit="true"/>
</f:facet>
<af:inputFile label="EmpFile" id="if1" value="#{FileProcessor.uploadedFile}"
partialTriggers="uploadButton" binding="#{FileProcessor.inputFile}"/>
<af:messages id="m2"/>
</af:panelFormLayout>
</af:panelGroupLayout>
</f:facet>
<f:facet name="branding"/>
<f:facet name="copyright"/>
<f:facet name="status"/>
</af:pageTemplate>
</af:form>
</af:document>
</f:view>
</jsp:root>
and bean class code is as follows.
package xxorn.model.view;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import oracle.adf.view.rich.component.rich.input.RichInputFile;
import oracle.adf.view.rich.component.rich.output.RichMessages;
import oracle.adf.view.rich.context.AdfFacesContext;
import org.apache.myfaces.trinidad.model.UploadedFile;
import org.apache.myfaces.trinidad.util.ComponentUtils;
public class FileProcessor {
private CSVtoADFTableProcessor tablecreator;
private UploadedFile uploadedFile;
private String filename;
private long filesize;
private String filecontents;
private String filetype;
private RichMessages errorMsg;
private RichInputFile inputFile;
public FileProcessor() {
public void setUploadedFile(UploadedFile uploadedFile) {
this.uploadedFile = uploadedFile;
this.filename = uploadedFile.getFilename();
this.filesize = uploadedFile.getLength();
this.filetype = uploadedFile.getContentType();
try {
if (filename.endsWith(".csv"))
tablecreator.processCSV(uploadedFile.getInputStream());
else if(filename.endsWith(".xls")){
System.out.println("uploaded file is ********"+uploadedFile);
tablecreator.fileSubmit(uploadedFile.getInputStream());
//tablecreator.WriteXLS(uploadedFile.getInputStream());
else if (filename.endsWith(".xlsx")){
tablecreator.fileSubmitXSSF(uploadedFile.getInputStream());
//wrong file upload
else{
String msg="this is a global message.";
FacesContext ctx =FacesContext.getCurrentInstance();
FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, "Please Upload proper file");
ctx.addMessage(null,fm);
} catch (IOException e) {
e.printStackTrace();
public void convertStreamToString(InputStream is) throws IOException {
StringBuilder sb = new StringBuilder();
String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
System.out.println(sb.toString());
public UploadedFile getUploadedFile() {
return uploadedFile;
public void setFilename(String filename) {
this.filename = filename;
public String getFilename() {
return filename;
public void setFilesize(long filesize) {
this.filesize = filesize;
public long getFilesize() {
return filesize;
public void setFilecontents(String filecontents) {
this.filecontents = filecontents;
public String getFilecontents() {
return filecontents;
public void setFiletype(String filetype) {
this.filetype = filetype;
public String getFiletype() {
return filetype;
public void setTablecreator(CSVtoADFTableProcessor tablecreator) {
this.tablecreator = tablecreator;
public CSVtoADFTableProcessor getTablecreator() {
return tablecreator;
public void setErrorMsg(RichMessages errorMsg) {
this.errorMsg = errorMsg;
public RichMessages getErrorMsg() {
return errorMsg;
public String checkFile(ActionEvent actionEvent) throws Exception {
// Add event code here...
System.out.println("in upload action event");
/* RichInputFile vTheInputFileComponent = getInputFile();
vTheInputFileComponent.resetValue();*/
FacesContext vFacesContext = FacesContext.getCurrentInstance();
UIViewRoot vUIViewRoot = vFacesContext.getViewRoot();
RichInputFile vTheInputFileComponent =
(RichInputFile)vUIViewRoot.findComponent("if1");
vTheInputFileComponent.resetValue();
AdfFacesContext adfFacesCtx = AdfFacesContext.getCurrentInstance();
adfFacesCtx.addPartialTarget(inputFile);
return null;
public void setInputFile(RichInputFile inputFile) {
this.inputFile = inputFile;
inputFile=null;
public RichInputFile getInputFile() {
return inputFile;
}