/*
* 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.scr.impl.inject;
/**
* {@code ReferenceMethods} holds pointers to methods for a single reference.
* The methods are used for event (method) injection and field injection.
*
*
* - The bind method
*
- The unbind method
*
- The updated method
*
- The init method (optional, only used for field references)
*
*/
public interface ReferenceMethods
{
/**
* Get the method to bind a service.
* Never returns {@code null}.
*/
ReferenceMethod getBind();
/**
* Get the method to unbind a service.
* Never returns {@code null}.
*/
ReferenceMethod getUnbind();
/**
* Get the method to update a service.
* Never returns {@code null}.
*/
ReferenceMethod getUpdated();
/**
* Get an optional method to initialize the component reference handling.
* This is optional and might return {@code null}
*/
InitReferenceMethod getInit();
/**
* This is a NOP implementation.
*/
ReferenceMethods NOPReferenceMethod = new ReferenceMethods() {
@Override
public ReferenceMethod getBind() {
return ReferenceMethod.NOPReferenceMethod;
}
@Override
public ReferenceMethod getUnbind() {
return ReferenceMethod.NOPReferenceMethod;
}
@Override
public ReferenceMethod getUpdated() {
return ReferenceMethod.NOPReferenceMethod;
}
@Override
public InitReferenceMethod getInit() {
return null;
}
};
}