jakarta.faces.component.UISelectItemGroups Maven / Gradle / Ivy
/*
* Copyright (c) 2021 Contributors to Eclipse Foundation.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.faces.component;
import static com.sun.faces.util.SelectItemUtils.collectSelectItems;
import static com.sun.faces.util.SelectItemUtils.createSelectItems;
import java.util.ArrayList;
import java.util.List;
import jakarta.faces.context.FacesContext;
import jakarta.faces.model.SelectItem;
import jakarta.faces.model.SelectItemGroup;
/**
*
* UISelectItemGroups is a component that may be nested inside a {@link UISelectMany} or {@link UISelectOne} component, and causes the addition
* of one or more {@link SelectItemGroup} of one or more {@link SelectItem} instances to the list of available options in the parent component. This component
* accepts only children of type {@link UISelectItems} or {@link UISelectItem}. The value attribute of this component, set either directly, or
* acquired indirectly via a {@link jakarta.el.ValueExpression}, can be an array or {@link Iterable} of items of any type which is acceptable by the
* value attribute of any nested {@link UISelectItems} or {@link UISelectItem} component.
*
*
* @since 4.0
*/
public class UISelectItemGroups extends UISelectItems {
// -------------------------------------------------------------------------------------------------------------------------------------- Manifest Constants
/**
*
* The standard component type for this component.
*
*/
public static final String COMPONENT_TYPE = "jakarta.faces.SelectItemGroups";
// ---------------------------------------------------------------------------------------------------------------------------------- ValueHolder Properties
/**
*
* Iterate over the value attribute and wrap each item in a new {@link SelectItemGroup} instance whereby the item is exposed as a request
* attribute under the key specified by the var property. This must allow any nested {@link UISelectItems} or {@link UISelectItem} component
* to access the item via their attributes. Finally return these {@link SelectItemGroup} instances as an ordered collection.
*
*/
@Override
public Object getValue() {
FacesContext context = getFacesContext();
List groups = new ArrayList<>();
createSelectItems(context, this, super.getValue(), SelectItemGroup::new, selectItemGroup -> {
selectItemGroup.setSelectItems(collectSelectItems(context, this));
groups.add(selectItemGroup);
});
return groups;
}
}