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  Home >> Miscellaneous >> JSF-Example-Tags-dataTable 

Taking another small step towards learning JSF Tags, I have tried to
extend one example already in discussion in thie web site at 
Referring to the earlier example page

In this writing I shall be using dataTable from JSF-based Tag library,
in order to show a tabular structure with header and body section filled
up dynamically from the managed bean field variables.

These field variables are defined as String arrays, and there is a separate
field acting as counter for data table's column tag.

For the sake of making this example simple and to the point I shall be
removing some and adding some of the fields in the managed bean of this
example, that is "ButtonEventCapture.java"















ButtonEventCapture.java



package sample;

import java.io.PrintStream;
import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;

import javax.faces.model.SelectItem;
import javax.faces.context.FacesContext;
import javax.faces.component.UIComponent;
import javax.faces.validator.Validator;

public class ButtonEventCapture
{

    public ButtonEventCapture()
    {
        tableData = new SelectItem[]{new SelectItem("zero","zero"),
                                     new SelectItem("one","one"),
                                     new SelectItem("two","two"),
                                     new SelectItem("three","three"),
                                     new SelectItem("four","four"),
                                     new SelectItem("five","five"),
                                     new SelectItem("six","six"),
                                     new SelectItem("seven","seven"),
                                     new SelectItem("eight","eight")};

    }


    public String submitButton()
    {
        //do something useful here.
         return "preview";
    }
    public String cancelButton()
    {
        System.out.println("Cancel button is clicked...");
        return null;
    }

    public SelectItem[] getTableData() {
      return tableData;
    }
	public void setTableData(SelectItem[] objs) {
		System.out.println(objs.length +"  "+objs[0]);

	}
	public void setSelectedData(String[] arg) {
		System.out.println(arg.length + "  " +arg[0]);
		selectedData = arg;
	}
	public String[] getSelectedData() {
		return selectedData;
	}
	public void setSelectedList(String[] arg) {
		System.out.println(arg.length + "  " +arg[0]);
		selectedList = arg;
	}
	public String[] getSelectedList() {
		return selectedList;
	}
	public void setSelectedListData(String data) {
		selectedListData = data;
	}
	public String getSelectedListData() {
		return selectedListData;
	}
	public void setSelectedRadioData(String data) {
		selectedRadioData = data;
	}
	public String getSelectedRadioData() {
		return selectedRadioData;
	}
	public void setChkBox(boolean arg) {
		System.out.println(arg);
		chkBox = arg;
	}
	public boolean getChkBox() {
		return chkBox;
	}
	public void setChkBoxLabel(String arg) {
		System.out.println(arg);
	}
	public String getChkBoxLabel() {
		return chkBoxLabel;
	}

	public String[] getCountData() {
	  countData = new String[selectedData.length];
	  for(int i=0;i<countData.length;i++) {
	    countData[i] = i+"";
	  }
	  return countData;
	}

    SelectItem[] tableData;
    boolean chkBox;
    String chkBoxLabel;
    String[] selectedData;
    String[] selectedList;
    String selectedListData;
    String selectedRadioData;
    String[] countData;
}



This class has countData as the field for retaining count starting from 0
to the number of data/values to be displayed in the dataTable JSF-based
Tag.

While selectedData and selectedList fields are String arrays for holding
ids of those check boxes/list items selected by the user in the index page.
On submission of index page, these values gets populated in the respective
fileds of this managed bean, and preview page uses these values to display
a tabular data with header and body facets defined in the JSF-based dataTable
Tag.


index.jsp



<%@ taglib uri="http://java.sun.com/jsf/html" prefix="sampleHtml" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="sampleCore" %>
<html>
<body>
<sampleCore:view locale="en_US">
<sampleCore:loadBundle basename="sample" var="s"/>
<h4><sampleHtml:outputText value="#{s.title_text}"/></h4>
<sampleHtml:messages layout="table"/>
  <sampleHtml:form>
  <sampleHtml:selectManyCheckbox id="manyChkBoxes" value="#{SampleMGMTBean.selectedData}">
    Selected Many Checkboxes :
    <sampleCore:selectItems value="#{SampleMGMTBean.tableData}"/>
  </sampleHtml:selectManyCheckbox>

  <br>
  <sampleHtml:selectManyListbox id="manyListBoxes" value="#{SampleMGMTBean.selectedList}">
    selectManyListbox :
    <sampleCore:selectItems value="#{SampleMGMTBean.tableData}"/>
  </sampleHtml:selectManyListbox>
  <br>
  <table>
     <tr><td><sampleHtml:commandButton value="Submit"
	                        action="#{SampleMGMTBean.submitButton}"/></td>
     <td><sampleHtml:commandButton value="Cancel"
	                        action="#{SampleMGMTBean.cancelButton}"/></td></tr>
  </table>
  </sampleHtml:form>
</sampleCore:view>
</body>
</html>



This index.jsp is displayed when the URL for this example is
something like this : http://localhost:8080/JSF-Based-Example/index.jsf
(please note that the index.jsp is addressed as indes.jsf in the above URL)



preview.jsp



<%@ taglib uri="http://java.sun.com/jsf/html" prefix="sampleHtml" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="sampleCore" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="jstlCore" %>

<html>
<body>
<h4>Preview</h4>
<sampleCore:view>
  <sampleHtml:form>

     <sampleHtml:dataTable width="100" first="0" border="0" bgcolor="#eeff44"
                 style="border: 1px solid #000000;" var="v1" value="#{SampleMGMTBean.countData}" >

      <sampleHtml:column>
        <sampleCore:facet name="header">
         <sampleHtml:outputText value="Selected Checkboxes"/>
        </sampleCore:facet>
                 <sampleHtml:outputText value="#{SampleMGMTBean.selectedData[v1]}"/>
      </sampleHtml:column>
      <sampleHtml:column>
        <sampleCore:facet name="header">
         <sampleHtml:outputText value="Selected List"/>
        </sampleCore:facet>
                 <sampleHtml:outputText value="#{SampleMGMTBean.selectedList[v1]}"/>
      </sampleHtml:column>

     </sampleHtml:dataTable>
  </sampleHtml:form>
</sampleCore:view>
</body>
</html>



The above preview page is displayed as shown below:



This may not be the only way to use dataTable Tag, but one can explore
many different ways of doing certain things right.

Hope to read from you soon, please use the comment section below.
If anything missed out , please let me know at
techienjoy at yahoo . com
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References : 
Tags: TabHost and TabActivity Example on Android Platform
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Tags: Android example download any file sourcecode
Tags: android expandable list dynamically created example
Tags: android expandable list example
Tags: Android Gallery surfaceviews spinner
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Tags: DOJO Example Dialog
Tags: DOJO Example Tree Widget
Tags: different logger file log4j
Tags: JDBC Transaction isolation
Tags: event handling java code
Tags: example quartz scheduler
Tags: example tag library web application
Tags: Flex
Tags: index
Tags: inmemory image creation java awt
Tags: JSF Example Main
Tags: JSF Example Tags CheckBoxes
Tags: JSF Example Tags dataTable
Tags: JSF Example Tags SelectBoxes
Tags: JSF Example Tags Walkthrough
Tags: JSF Example Validation
Tags: JSF Resource Bundle
Tags: log4j example 1
Tags: log4j example
Tags: Miscellaneous
Tags: Mule ESB File Transport
Tags: Mule ESB JMS Transport
Tags: stream download batch
Tags: sychronized block wait notify
Tags: thread wait notify example
Tags: using apache commons log
Tags: web load test
Tags: Wizard Framework Idea Java



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