/*
 * Copyright 2005-2010 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.wamblee.system.core;

import java.util.List;

/**
 * A scope represents a set of running services and the runtime information for
 * the started components and is (usually) the result of starting a container.
 * 
 * @author Erik Brakkee
 */
public interface Scope {
    /**
     * Gets the provided interfaces by this scope.
     * 
     * @return Provided interfaces.
     */
    List<ProvidedInterface> getProvidedInterfaces();

    /**
     * Adds a key value pair to the scope.
     * 
     * @param aKey
     *            Key
     * @param aValue
     *            Value.
     */
    void put(String aKey, Object aValue);

    /**
     * Retrieves a value for the key.
     * 
     * @param aKey
     *            Key.
     * 
     * @return Value.
     */
    Object get(String aKey);

    /**
     * Adds the runtime of a started component.
     * 
     * @param aComponent
     *            Component.
     * @param aRuntime
     *            Runtime.
     */
    void addRuntime(Component aComponent, Object aRuntime);

    /**
     * Publishes an implementation of a provided interface.
     * 
     * @param aInterface
     *            Interface that is provided.
     * @param aImplementation
     *            Implementation of the interface.
     */
    void publishInterface(ProvidedInterface aInterface, Object aImplementation);

    <T> T getInterfaceImplementation(ProvidedInterface aProvided, Class<T> aType);

    /**
     * Gets the runtime for a component.
     * 
     * @param aComponent
     *            Component for which we want to get the runtime.
     * 
     * @return Runtime.
     */
    Object getRuntime(Component aComponent);

    /**
     * Gets the runtime for a component based on the name of the component
     * (excluding its context).
     * 
     * @param aName
     *            Component name.
     * 
     * @return Component name.
     */
    Object getRuntime(String aName);
}