001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.discovery;
018
019/**
020 * Iterator over discovered SPI type.
021 *
022 * @param <T> The SPI type
023 */
024public abstract class ResourceClassIterator<T> extends ResourceIterator {
025
026    /**
027     * Returns the next SPI Class in the iteration.
028     *
029     * @param <S> Any type extends T
030     * @return The next SPI Class in the iteration
031     */
032    public abstract <S extends T> ResourceClass<S> nextResourceClass();
033
034    /**
035     * {@inheritDoc}
036     */
037    @Override
038    public Resource nextResource() {
039        return nextResourceClass();
040    }
041
042    /**
043     * {@inheritDoc}
044     */
045    @Override
046    public String nextResourceName() {
047        return nextResourceClass().getName();
048    }
049
050}