/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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 General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.foundation;
public class SimpleObjectPool<T> implements ObjectPool<T> {
private final Object[] _objects;
private int _available;
public SimpleObjectPool(T... objects) {
final int length = objects.length;
_objects = new Object[length];
for (int i=0; i<length; ++i) {
_objects[length-i-1] = objects[i];
}
_available = length;
}
@SuppressWarnings("unchecked")
public T borrowObject() {
if (_available == 0) {
throw new IllegalStateException();
}
return (T)_objects[--_available];
}
public void returnObject(T o) {
if (_available == _objects.length) {
throw new IllegalStateException();
}
_objects[_available++] = o;
}
}