/**
* License Agreement.
*
* JBoss RichFaces - Ajax4jsf Component Library
*
* Copyright (C) 2008 CompuGROUP Holding AG
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.richfaces.component;
import java.util.Iterator;
import java.util.NoSuchElementException;
import javax.faces.component.UIComponent;
import org.richfaces.component.UIColumn;
/**
* Columns iterator that work exactly like org.richfaces.component.ColumnsIterator
* but raw type is {@link org.richfaces.component.UIColumn} instead of {@link javax.faces.component.UIComponent}
* @see org.richfaces.component.ColumnsIterator
* @author pawelgo
*
*/
public class ExtendedTableColumnsIterator implements Iterator<UIColumn> {
protected Iterator<UIComponent> childrenIterator;
protected UIColumn next;
protected boolean initialized = false;
/**
* Creates iterator for table.
* @param dataTable table for which iterator is created
*/
public ExtendedTableColumnsIterator(UIExtendedDataTable dataTable) {
super();
childrenIterator = dataTable.getChildren().iterator();
}
/* (non-Javadoc)
* @see java.util.Iterator#hasNext()
*/
public boolean hasNext() {
if(!initialized){
next = nextColumn();
initialized = true;
}
return null != next;
}
/* (non-Javadoc)
* @see java.util.Iterator#next()
*/
public UIColumn next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
UIColumn result = next;
next = nextColumn();
return result;
}
protected UIColumn nextColumn(){
UIColumn nextColumn = null;
while (childrenIterator.hasNext()) {
UIComponent child = childrenIterator.next();
if(child instanceof UIColumn){
nextColumn = (UIColumn)child;
break;
}
}
return nextColumn;
}
/* (non-Javadoc)
* @see java.util.Iterator#remove()
*/
public void remove() {
throw new UnsupportedOperationException("Iterator is read-only");
}
}