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.service.impl;
016
017import org.apache.hivemind.HiveMind;
018import org.apache.hivemind.Location;
019import org.apache.hivemind.internal.Module;
020import org.apache.hivemind.service.ObjectProvider;
021
022/**
023 * An {@link org.apache.hivemind.service.ObjectProvider} that provides access to services. Returns
024 * null if the input is null. Deployed with the prefix "service".
025 * 
026 * @author Howard Lewis Ship
027 */
028public class ServiceObjectProvider implements ObjectProvider
029{
030    /**
031     * Interprets the locator as a service id, and passes it to
032     * {@link Module#getService(String, Class)}.
033     */
034    public Object provideObject(Module contributingModule, Class propertyType, String locator,
035            Location location)
036    {
037        if (HiveMind.isBlank(locator))
038            return null;
039
040        return contributingModule.getService(locator, Object.class);
041    }
042
043}