/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,

  * either express or implied. See the License for the specific language

  * governing permissions and limitations under the License.

  */

 package org.seasar.teeda.core.util;

 import java.util.Collection;

 import java.util.Iterator;

 import javax.faces.component.UIComponent;

 /**

  * @author manhole

  */

 public class RenderedComponentIterator implements Iterator {

     private Iterator iterator;

     private UIComponent component;

     public RenderedComponentIterator(final Collection collection) {

         iterator = collection.iterator();

     }

     public boolean hasNext() {

         if (component != null) {

             return true;

         }

         while (iterator.hasNext()) {

             final UIComponent c = (UIComponent) iterator.next();

             if (c.isRendered()) {

                 component = c;

                 return true;

             }

         }

         return false;

     }

     public Object next() {

         if (component != null) {

             final UIComponent c = component;

             component = null;

             return c;

         }

         while (true) {

             final UIComponent c = (UIComponent) iterator.next();

             if (c.isRendered()) {

                 return c;

             }

         }

     }

     public void remove() {

         throw new UnsupportedOperationException("remove");

     }

 }