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    
015    package org.apache.tapestry.services;
016    
017    import org.apache.hivemind.Location;
018    
019    /**
020     * @author Howard M. Lewis Ship
021     * @since 4.0
022     */
023    public interface InjectedValueProvider
024    {
025        /**
026         * Looks up a value in HiveMind using the object reference (as with HiveMind's built-in object
027         * translator). The module will always be the Tapestry module (which means that most service ids
028         * or configurations will have to be fully qualified.
029         * 
030         * @param objectReference
031         *            the reference to the HiveMind object to obtain, with a leading prefix indicating
032         *            type (i.e., "service:", "configuration:", etc.
033         * @param location
034         *            the location of the value, used if an error must be reported.
035         * @return the value
036         */
037    
038        Object obtainValue(String objectReference, Location location);
039    }