/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you 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.apache.felix.ipojo; | |
import java.util.Dictionary; | |
/** | |
* Context Source service interface. | |
* A context source advertises of context changes. | |
* @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> | |
*/ | |
public interface ContextSource { | |
/** | |
* Gets the current value of the given property. | |
* @param property property name | |
* @return the property value (<code>null</code> if unknown) | |
*/ | |
Object getProperty(String property); | |
/** | |
* Gets the entire context. | |
* @return the dictionary [Property, Value] | |
*/ | |
Dictionary getContext(); | |
/** | |
* Registers a context listener on the given set of properties. | |
* The listener will be notified of every changes made on monitored properties. | |
* @param listener the context listener to register. | |
* @param properties property set monitored by the listener. | |
*/ | |
void registerContextListener(ContextListener listener, String[] properties); | |
/** | |
* Unregisters the given context listener. | |
* @param listener the listener to unregister. | |
*/ | |
void unregisterContextListener(ContextListener listener); | |
} |