001    // Copyright 2007, 2008 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.ioc.services;
016    
017    import java.util.Collection;
018    
019    /**
020     * Scans the classpath for top-level classes within particular packages.
021     *
022     * @see org.apache.tapestry5.ioc.services.ClasspathURLConverter
023     */
024    public interface ClassNameLocator
025    {
026        /**
027         * Searches for all classes under the given package name. This consists of all top-level classes in the indicated
028         * package (or any sub-package), but excludes inner classes. No other filtering (beyond inner classes) occurs, so
029         * there's no guarantee that the class names returned are public (for example).
030         *
031         * @param packageName
032         * @return fully qualified class names
033         */
034        Collection<String> locateClassNames(String packageName);
035    }