Final year project

Now we are working hard on our final year projects. Im in Rampart2 project group. Its a security module for Apache Axis2.

I'm working on XML Encryption part in XMLSec project. I have to use Axiom instead of DOM to parse XML in this new version to increase performance as it uses pull parsing while DOM does push parsing.

We have to finish the project before end of January. So having a hard time:)

Training is over

Our 6 months industrial training period is over now. We submitted the training report on last Friday and had the viva yesterday. So it's almost over although we continue working till may optimizing the vacation. (missed 2 months vacation however:)

JSF: Binding dataTable from managed bean

This is a very easy method to retrieve row data of the data table in jsp page, from managed bean.

<h:dataTable var="item" value="#{MyBean.items}"
binding="#{MyBean.dataTable}" >
<h:column>
<h:outputText styleClass="output" value="#{item.productName}"/>
</h:column>

<h:column>
<h:commandButton value="remove" action="#{MyBean.remove}" />
</h:column>
</h:dataTable>

.

public class MyBean {
   private ArrayList items = new ArrayList();
   private HtmlDataTable dataTable;

   public ArrayList getItems() {
      return items;
   }

   public void setItems(List items) {
      this.items = new ArrayList(items);
   }

   public void remove(){
      ItemBean item = (ItemBean) getDataTable().getRowData();
      items.remove(item);
   }

   public HtmlDataTable getDataTable() {
      return dataTable;
   }

   public void setDataTable(HtmlDataTable dataTable){
      this.dataTable = dataTable;
   }

}

here, when user clicks the remove button, the related item is removed
from the data table.

Calling Servlets from JSF

Another point I struggled with is calling servlets from JSF. Here is a simple example.

This is the bean which is called from .jsp page

import javax.faces.context.FacesContext;

public class ServletTest {

    public void doThis(){
    String url = "url of your servlet";
    FacesContext context = FacesContext.getCurrentInstance();
    try {
       context.getExternalContext().dispatch(url);
    }catch (Exception e) {
       e.printStackTrace();
    }
    finally{
       context.responseComplete();
    }
  }
}

This is the .jsp page

<f:view>
<h:form id="myForm">
<h:commandButton value="Do" action="#{ServletTest.doThis}" />
</h:form>
</f:view>

Parameter passing in JSF

My part of the interns' project is to develop a web portal using JSF. However I'm new to JSF and have to search and learn. The hardest point I struggled with is passing parameters to the backing bean from the UI. I was stuck a whole day on this. Finally I got it and I'm wondering how hard this simple thing to be found and this is that.

<h:form>
    <h:commandButton value="Show" actionListener="#{MyBean.setStr}" action="#{MyBean.go}" >
        <f:attribute name="name" value="Hello"/>
    </h:commandButton>
</h:form>

public class MyBean {
    private String str;
    .....
    public void setStr(ActionEvent event){
        String name = (String) event.getComponent().getAttributes().get("name");
        this.str=name;
    }

    public String go(){
        return ("success");
    }
}

This may help those who are new to JSF like me:)