/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.cli.impl.lang;
/**
* @author Julien Viet
*/
public interface Instance<T> {
/**
* Resolve the specified contextual type to an instance or return null if no object able
* to satisfy the class type was resolved.
*
* @param type the type to resolve
* @param <T> the generic type parameter
* @return the resolved instance
*/
<T> T resolve(Class<T> type);
/**
* Return the instance, the same instance should be returned, however it can lazily be created.
*
* @return the instance
* @throws Exception any exception preventing to obtain the instance
*/
T get() throws Exception;
}