/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.example;
import java.util.Iterator;
/**
* An iterator for attribute roles which is able to iterate over all
* attributes or skip either regular or special attributes.
*
* @author Ingo Mierswa
* @version $Id: AttributeRoleIterator.java,v 1.5 2008/05/09 19:22:42 ingomierswa Exp $
*/
public class AttributeRoleIterator implements Iterator<AttributeRole> {
private Iterator<AttributeRole> parent;
private int type = Attributes.REGULAR;
private AttributeRole current = null;
public AttributeRoleIterator(Iterator<AttributeRole> parent, int type) {
this.parent = parent;
this.type = type;
}
public boolean hasNext() {
while ((current == null) && (parent.hasNext())) {
AttributeRole candidate = parent.next();
switch (type) {
case Attributes.REGULAR:
if (!candidate.isSpecial())
current = candidate;
break;
case Attributes.SPECIAL:
if (candidate.isSpecial())
current = candidate;
break;
case Attributes.ALL:
current = candidate;
break;
default:
break;
}
}
return current != null;
}
public AttributeRole next() {
hasNext();
AttributeRole returnValue = current;
current = null;
return returnValue;
}
public void remove() {
parent.remove();
this.current = null;
}
}