001// Copyright 2004, 2005 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
015package org.apache.hivemind.lib;
016
017/**
018 * Service interface for performing name lookups.  This is typically
019 * implemented as a wrapper around JNDI.  This service is available
020 * as <code>hivemind.lib.NameLookup</code>.
021 *
022 * @author Howard Lewis Ship
023 */
024
025public interface NameLookup
026{
027    /**
028     * Performs the lookup, returning the object that was found.
029     * 
030     * @param name the name to lookup
031     * @param expected the expected class of the object; the object found must be assignable
032     * to this class (which may be a class or interface)
033     * @throws org.apache.tapestry.ApplicationRuntimeException if an error occurs during
034     * the lookup, or if the found object can not be assigned to the expected class.
035     */
036    public Object lookup(String name, Class expected);
037}