org.glassfish.pfl.basic.facet.FacetAccessorDelegateImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2007, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.glassfish.pfl.basic.facet;
/** Implementation of FacetAccessor that delegates to another FacetAccessor,
* typically a FacetAccessorImpl. The purpose of this call is to provide
* a convenient template of methods that may be copied into a class that
* implements FacetAccessor. Typically such a class implements that
* FacetAccessor interface and defines a data member initialized as:
*
* FacetAccessor facetAccessorDelegate = new FacetAccessorImpl( this ) ;
*
* and then simply copies the other methods directly.
*
* This is all a workaround for the fact that Java does not
* support dynamic inheritance, or more than one superclass.
*
* Because this is a template, I have commented out all of the code.
* It is not used at runtime or compiletime.
*
* @author ken
*/
abstract class FacetAccessorDelegateImpl implements FacetAccessor {
/*
private FacetAccessor facetAccessorDelegate ;
public FacetAccessorDelegateImpl( FacetAccessor fa ) {
facetAccessorDelegate = fa ;
}
public T facet(Class cls ) {
return facetAccessorDelegate.facet( cls ) ;
}
public void addFacet(T obj) {
facetAccessorDelegate.addFacet( obj ) ;
}
public void removeFacet( Class cls ) {
facetAccessorDelegate.removeFacet( cls ) ;
}
public Object invoke(Method method, Object... args) {
return facetAccessorDelegate.invoke( method, args ) ;
}
public Object get( Field field ) {
return facetAccessorDelegate.get( field ) ;
}
public Collection