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  /*
   * $Id: SelectItemGroup.java,v 1.6 2007/04/27 22:00:10 ofung Exp $
   */
  
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 package javax.faces.model;
 
 

SelectItemGroup is a subclass of SelectItem that identifies a set of options that will be made available as a subordinate "submenu" or "options list", depending upon the requirements of the javax.faces.component.UISelectMany or javax.faces.component.UISelectOne renderer that is actually used. In general, the value property of this instance will be ignored, and the label property of this instance will be used to label the submenu.

Although it is feasible to incorporate SelectItemGroup instances in he selectItems property of this instance (thereby creating a data structure suitable for cascading submenus), some renderers may place restrictions on the level of nesting they support. For example, HTML based renderers that create an <select> element will typically render this instance as an <optgroup> element, but the HTML 4.01 Specification disallows nested option groups.

 
 
 public class SelectItemGroup extends SelectItem {
 
 
     // ------------------------------------------------------------ Constructors
 

    

Construct a SelectItemGroup with no initialized property values.

 
     public SelectItemGroup() {
 
         super();
 
     }


    

Construct a SelectItemGroup with the specified label and no associated selectItems. The value property will be set to a zero-length String, the description property will be set to null, and the disabled property will be set to false.

Parameters:
label Label to be rendered for this group in the response
Throws:
java.lang.NullPointerException if label is false
 
     public SelectItemGroup(String label) {
 
         super(""label);
 
     }


    

Construct a SelectItemGroup with the specified properties. The value property will be set to a zero-length String.

Parameters:
label Label to be rendered for this group in the response
description Description of this group, for use in tools
disabled Flag indicating that this group is disabled
selectItems Array of SelectItem describing the items available in this group
Throws:
java.lang.NullPointerException if label or selectItems is false
    public SelectItemGroup(String labelString descriptionboolean disabled,
                           SelectItem selectItems[]) {
        super(""labeldescriptiondisabled);
        setSelectItems(selectItems);
    }
    // ------------------------------------------------------ Instance Variables
    private SelectItem selectItems[] = null;
    // -------------------------------------------------------------- Properties


    

Return the set of subordinate SelectItems for this group.

    public SelectItem[] getSelectItems() {
        return (this.);
    }


    

Set the set of subordinate SelectItems for this group.

Parameters:
selectItems The new set of subordinate items
Throws:
java.lang.NullPointerException if selectItems is null
    public void setSelectItems(SelectItem selectItems[]) {
        if (selectItems == null) {
            throw new NullPointerException();
        }
        this. = selectItems;
    }
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