/*

  * Copyright 2009-2010 Steve Chaloner

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package be.objectify.led;

 /**

  * Property contexts are the access points to property sources, e.g. System, property files,

  * or any arbitrary source.

  *

  * @author Steve Chaloner

  */

 public interface PropertyContext

 {

     /**

      * Gets the named propety from the context.

      *

      * @param propertyName the name of the property

      * @return the value mapped to the property name, or null if no value exists

      */

     String getValue(String propertyName);

 }