/*
* Copyright 2002-2008 the original author or authors.
*
* 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 org.springframework.test.annotation;
/**
* <p>
* Strategy interface for retrieving <em>profile values</em> for a given
* testing environment.
* </p>
* <p>
* Concrete implementations must provide a <code>public</code> no-args
* constructor.
* </p>
* <p>
* Spring provides the following out-of-the-box implementations:
* </p>
* <ul>
* <li>{@link SystemProfileValueSource}</li>
* </ul>
*
* @author Rod Johnson
* @author Sam Brannen
* @since 2.0
* @see ProfileValueSourceConfiguration
* @see IfProfileValue
* @see ProfileValueUtils
*/
public interface ProfileValueSource {
/**
* Get the <em>profile value</em> indicated by the specified key.
* @param key the name of the <em>profile value</em>
* @return the String value of the <em>profile value</em>, or <code>null</code>
* if there is no <em>profile value</em> with that key
*/
String get(String key);
}
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