org.hibernate.internal.util.collections.LazyIterator Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.internal.util.collections;
import java.util.Iterator;
import java.util.Map;
public final class LazyIterator implements Iterator {
private final Map map;
private Iterator iterator;
private Iterator getIterator() {
if (iterator==null) {
iterator = map.values().iterator();
}
return iterator;
}
public LazyIterator(Map map) {
this.map = map;
}
public boolean hasNext() {
return getIterator().hasNext();
}
public Object next() {
return getIterator().next();
}
public void remove() {
throw new UnsupportedOperationException();
}
}