| /******************************************************************************* |
| * Copyright (c) 2007, 2009 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * EclipseSource - ongoing development |
| *******************************************************************************/ |
| package org.eclipse.equinox.p2.cudf.query; |
| |
| |
| import java.util.Iterator; |
| |
| /** |
| * The superclass of all queries that can be performed on an {@link IQueryable}. |
| * <p> |
| * |
| * <B>NOTE: This interface does not follow the proper naming convention. It should |
| * be IQuery, however, for historic reasons it is Query. This is likely to change.</B> |
| * |
| * @noimplement This interface is not intended to be implemented by clients. |
| * @noextend This interface is not intended to be extended by clients. |
| */ |
| public interface Query { |
| |
| /** |
| * Evaluates the query for a specific input. |
| * |
| * @param iterator The elements for which to evaluate the query on |
| * @param result A collector to collect the results. For each element accepted |
| * by the query,{@link Collector#accept(Object)} must be called. |
| * @return The results of the query. The collector returned must be |
| * the collector passed in. |
| */ |
| public abstract Collector perform(Iterator iterator, Collector result); |
| |
| } |
