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     */
017    package org.apache.commons.discovery;
018    
019    /**
020     * Iterator over discovered SPI type.
021     *
022     * @param <T> The SPI type
023     */
024    public 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    }