Component binding table

Question

Hi,
can someone give me an example of component binding with dataTable?
In my app i must use this, because i don't know number of columns - so i must make table in my java code. Each column consists of checkbox and inputText and under the table is submit button which submits entire table. Values of checkbox and inputText in one column are bind to BackBean (this bean has selected value and price value).
In my jsp, i use something like this:
<h:dataTable var="table" binding="#{model.table}" value="#{model.data}" />
I'm working on this for a week and I stil don't know how to do it.
Thanks in advance,
jarin

Answer 1

Hi,
yes U understand my problem. I have in my jsp only:
<h:dataTable binding="#{model.table}"/>
<h:commandButton action="#{model.set} value="submit"/>
I use client state saving,
model is managed bean ModelBean in request scope
my two classes, which do all work - they should work if you get them into any app, I removed any unnecessary pieces of code:
/* class ModelBean -------------------------------*/
package backing.divadlo;
import backing.divadlo.SedadloBack;
import javax.faces.component.html.*;
import java.util.*;
import javax.faces.el.ValueBinding;
import javax.faces.context.FacesContext;
import javax.faces.component.*;
public class ModelBean  {
  private UIData table;
  private ArrayList data;
  private int colNumber, rowNumber;
  public ModelBean() {
    table = new UIData();
    data = new ArrayList();
    colNumber = 0;
    rowNumber = 0;
  public void setData(ArrayList d) {
    this.data = d;
  public ArrayList getData() {
    return this.data;
  public void setTable(UIData tbl) {
    this.table = tbl;
  public UIData getTable() {
    init(); // normaly I call init() in another bean, if I select which auditorium will be shown
    return this.table;
  public void pripravData() {
    data.clear();
    // prepair of auditorium - get rows and number of cols
    rowNumber = 2;  // after all works, here will be rows of auditorium
    colNumber = 20; // seats in row, each row can have another number of seats
    // loop trough rows of auditorium
    for (int i = 0; i < rowNumber; i++) {
      ArrayList novaRada = new ArrayList();  // new row with seats
      // insert seats (SedadloBack) into new row
      for (int k = 0; k < colNumber; k++) {
        SedadloBack sedB = new SedadloBack(); // new seat
        sedB.setRada(k);      // set number of row
        sedB.setSedadlo(k);   // set number of seat
        sedB.setProdej(true); // is free or not
        sedB.setPrice(k);     // set price
        // insert seat into new row
        novaRada.add(sedB);
      // insert new row into auditorium
      data.add(novaRada);
  public void init() {
    FacesContext context = FacesContext.getCurrentInstance();
    List list = table.getChildren();
    list.clear();
    pripravData();
    if(data != null) {
      table.setValue(data);
      table.setRows(data.size());
      table.setRowIndex(0);
      table.setVar("dTable");
      UIColumn column;
      HtmlInputText priceText;
      HtmlSelectBooleanCheckbox checkbox;
      HtmlOutputText br1,br2,cislo;
      for (int i = 0; i < colNumber; i++) {
        column = new UIColumn();                    // new column
        priceText = new HtmlInputText();            // input for price
        checkbox = new HtmlSelectBooleanCheckbox(); // is free or not
        br1 = new HtmlOutputText();                 // <br>
        br2 = new HtmlOutputText();                 // <br>
        cislo = new HtmlOutputText();               // position of seat in row
        br1.setValue(new String("<br />"));
        br2.setValue(new String("<br />"));
        br2.setEscape(false);
        br1.setEscape(false);
        // prepare outText of position in row
        String cisloExp = "#{"+table.getVar()+"["+i+"].sedadlo}";
        ValueBinding vbCislo = context.getApplication().createValueBinding(cisloExp);
        cislo.setValueBinding("value",vbCislo);
        // prepare checkbox - if seat is free or not
        String expCheckbox = "#{"+table.getVar()+"["+i+"].prodej}";
        ValueBinding vbCheckbox = context.getApplication().createValueBinding(expCheckbox);
        checkbox.setValueBinding("value",vbCheckbox);
        // prepare inputText - price of seat
        priceText.setTitle("Cena");
        priceText.setStyleClass("cenaInput");
        String vbSIn = "#{"+table.getVar()+"["+i+"].price}";
        ValueBinding vbI = context.getApplication().createValueBinding(vbSIn);
        priceText.setValueBinding("value", vbI);
        // prepare column
        column.getChildren().add(cislo);
        column.getChildren().add(br1);
        column.getChildren().add(priceText);
        column.getChildren().add(br2);
        column.getChildren().add(checkbox);
        list.add(column);
  public String set() {
    // for now just print out price with position of seat
    for(int j=0; j < table.getRowCount(); j++) {
      table.setRowIndex(j);
      if(table.isRowAvailable()) {
        ArrayList data = (ArrayList)table.getRowData();
        for(int i=0; i < data.size(); i++) {
          SedadloBack sedadlo = (SedadloBack)data.get(i);
          System.out.println(sedadlo.getRada()+"/"+sedadlo.getSedadlo()
                             +" - "+sedadlo.getPrice());
    return "null";
/* class SedadloBack -------------------------------*/
package backing.divadlo;
import java.io.Serializable;
public class SedadloBack implements Serializable {
  private int id;
  private int rada;
  private int sedadlo;
  private int price;
  private boolean prodej;
  public void setId(int id) {
    this.id = id;
  public int getId() {
    return this.id;
  public void setRada(int rada) {
    this.rada = rada;
  public int getRada() {
    return this.rada;
  public void setSedadlo(int sedadlo) {
    this.sedadlo = sedadlo;
  public int getSedadlo() {
    return this.sedadlo;
  public void setProdej(boolean pr) {
    this.prodej = pr;
  public boolean getProdej() {
    return this.prodej;
  public void setPrice(int price) {
    this.price = price;
  public int getPrice() {
    return this.price;
} I realy appreciate your help, this is my first app in jsf - i make it as my dissertation and I am starting be little late.
If you need more info or code i give you what you want. Preparing war is little complicated - I use postgres and hibernate and i doubt if you want install this db only to test my case.
jarin