com.gemstone.gemfire.internal.cache.TStatelessLongIterator Maven / Gradle / Ivy
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* Contains code from GNU Trove having the license below.
*
* Copyright (c) 2001, Eric D. Friedman All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.gemstone.gemfire.internal.cache;
import com.gemstone.gnu.trove.*;
import java.util.ConcurrentModificationException;
/**
* Iterator for long collections.
*
* @author darrel
*/
public class TStatelessLongIterator extends TIterator {
/** the collection on which the iterator operates */
private final TStatelessLongHash _hash;
/**
* Creates a TStatelessLongIterator for the elements in the specified collection.
*/
public TStatelessLongIterator(TStatelessLongHash hash) {
super(hash);
this._hash = hash;
}
/**
* Advances the iterator to the next element in the underlying collection
* and returns it.
*
* @return the next long in the collection
* @exception java.util.NoSuchElementException if the iterator is already exhausted
*/
public long next() {
moveToNextIndex();
return _hash._set[_index];
}
/**
* Returns the index of the next value in the data structure
* or a negative value if the iterator is exhausted.
*
* @return an int value
* @exception ConcurrentModificationException if the underlying collection's
* size has been modified since the iterator was created.
*/
@Override
protected final int nextIndex() {
if (_expectedSize != _hash.size()) {
throw new ConcurrentModificationException();
}
long[] set = _hash._set;
long FREE = _hash.getFreeValue();
int i = _index;
while (i-- > 0 && (set[i] == FREE)) ;
return i;
}
}// TStatelessLongIterator