geronimo-jcdi_2.0_spec/src/main/java/javax/enterprise/context/spi/Contextual.java

/*
 * 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 javax.enterprise.context.spi;

import javax.enterprise.inject.CreationException;

/**
 * Each webbeans instance that is contained in the <code>Context</code>
 * must be defined as <code>Contextual</code>.
 * 
 * This interface defines the creating and destroying of the webbeans instances
 * that are contained in the its {@link Context} instance.
 * 
 * @param <T> type of the webbeans component
 * @see Context
 * 
 * @version $Rev$ $Date$
 */
public interface Contextual<T>
{
    /**
     * Creates and returns a new instance of the webbeans component.
     * 
     * @param context new creational context instance
     * @return the new instance of the webbeans component
     * @throws CreationException if any exception occurs
     */
    public T create(CreationalContext<T> context);

    /**
     * Destroys the instance. Any destroy logic is encapsulated
     * in this method.
     * 
     * @param instance already created webbeans instance
     * @param context creational context
     */
    public void destroy(T instance, CreationalContext<T> context);
}