JavaServer Faces

The JSP Tag Handler Class

As usual, we also need a custom action tag handler class for the component/renderer combination:

package com.mycompany.jsf.taglib;

import javax.faces.webapp.UIComponentTag;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import com.mycompany.jsf.component.UITree;

public class TreeTag extends UIComponentTag {
    private String value;
    private String var;
    private String varNodeToggler;

    public void setValue(String value) {
        this.value = value;
    }

    public void setVar(String var) {
        this.var = var;
    }

    public void setVarNodeToggler(String varNodeToggler) {
        this.varNodeToggler = varNodeToggler;
    }

    public String getComponentType( ) {
        return "com.mycompany.Tree";
    }

    public String getRendererType( ) {
        return "com.mycompany.Tree";
    }

    protected void setProperties(UIComponent component) {
        super.setProperties(component);

        FacesContext context = getFacesContext( );
        if (value != null) {
            ValueBinding vb = 
                context.getApplication( ).createValueBinding(value);
            component.setValueBinding("value", vb);
        }
                
        if (var != null) {
            ((UITree) component).setVar(var);
        }
                
        if (varNodeToggler != null) {
            ((UITree) component).setVarNodeToggler(varNodeToggler);
        }
    }
}

The com.mycompany.jsf.taglib.TreeTag follows the same pattern as all other component tag handlers, with setter methods for all action attributes, getComponentType() and getRendererType() methods returning the appropriate values, and a setProperties() method that sets the component ...