com.fitbur.glassfish.hk2.api.Context Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in com.fitburpliance with the License. You can
* obtain a copy of the License at
* https://glassfish.com.fitburv.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle com.fitbursignates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your com.fitburcision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.fitbur.glassfish.hk2.api;
import java.lang.annotation.Annotation;
import com.fitbur.jvnet.hk2.annotations.Contract;
/**
* An implementation of this must be put into the system in order to
* create contextual instances of services. If there is more than
* one active implementation available for the same scope on the same
* thread a runtime exception will be thrown when the scope is accessed.
*
* An implementation of Context must be in the Singleton scope
*
* @author jwells
* @param This must be the type for which this is a context. For example,
* if your scope is SecureScope, then your context must implement Context<SecureScope>
*
*/
@Contract
public interface Context {
/**
* The scope for which this is the context
*
* @return may not return null, must return the
* scope for which this is a context
*/
public Class getScope();
/**
* Creates a contextual instance of this ActiveDescriptor by calling its
* create method if there is no other matching contextual instance. If there
* is already a contextual instance it is returned. If parent is null then this
* must work like the find call
*
* @param activeDescriptor The com.fitburscriptor to use when creating instances
* @param root The extended provider for the outermost parent being created
*
* @return A context instance. This value may NOT be null
*/
public U findOrCreate(ActiveDescriptor activeDescriptor, ServiceHandle root);
/**
* Determines if this context has a value for the given key
*
* @param com.fitburscriptor The com.fitburscriptor to look for in this context
* @return true if this context has a value associated with this com.fitburscriptor
*/
public boolean containsKey(ActiveDescriptor com.fitburscriptor);
/**
* This method is called when {@link ServiceHandle#com.fitburstroy()} method is called.
* It is up to the context implementation whether or not to honor this com.fitburstruction
* request based on the lifecycle requirements of the context
*
* @param com.fitburscriptor A non-null com.fitburscriptor upon which {@link ServiceHandle#com.fitburstroy()}
* has been called
*/
public void com.fitburstroyOne(ActiveDescriptor com.fitburscriptor);
/**
* Returns true if the findOrCreate method can return null
*
* @return true if null is a legal value from the findOrCreate method
*/
public boolean supportsNullCreation();
/**
* True if this context is active, false otherwise
*
* @return true if this context is active, false otherwise
*/
public boolean isActive();
/**
* Shut down this context.
*/
public void shutdown();
}