com.sun.xml.ws.api.pipe.TubeCloner Maven / Gradle / Ivy
Show all versions of webservices-rt Show documentation
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 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 compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.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 designates 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 decision 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.sun.xml.ws.api.pipe;
import java.util.Map;
/**
* Clones the whole pipeline.
*
*
* Since {@link Tube}s may form an arbitrary directed graph, someone needs
* to keep track of isomorphism for a clone to happen correctly. This class
* serves that role.
*
* @author Kohsuke Kawaguchi
*/
public abstract class TubeCloner {
// Pipe to pipe, or tube to tube
public final Map master2copy;
/**
* Invoked by a client of a tube to clone the whole pipeline.
*
*
* {@link Tube}s implementing the {@link Tube#copy(com.sun.xml.ws.api.pipe.TubeCloner)} method
* shall use {@link #copy(Tube)} method.
*
* @param p
* The entry point of a pipeline to be copied. must not be null.
* @return
* The cloned pipeline. Always non-null.
*/
@SuppressWarnings("deprecation")
public static Tube clone(Tube p) {
// we often want to downcast TubeCloner to PipeCloner,
// so let's create PipeCloner to make that possible
return new PipeClonerImpl().copy(p);
}
// no need to be constructed publicly. always use the static clone method.
/*package*/ TubeCloner(Map master2copy) {
this.master2copy = master2copy;
}
/**
* Invoked by a {@link Tube#copy(com.sun.xml.ws.api.pipe.TubeCloner)} implementation
* to copy a reference to another pipe.
*
*
* This method is for {@link Tube} implementations, not for users.
*
*
* If the given tube is already copied for this cloning episode,
* this method simply returns that reference. Otherwise it copies
* a tube, make a note, and returns a copied tube. This additional
* step ensures that a graph is cloned isomorphically correctly.
*
*
* (Think about what happens when a graph is A->B, A->C, B->D, and C->D
* if you don't have this step.)
*
* @param t
* The tube to be copied.
* @return
* The cloned tube. Always non-null.
*/
public abstract T copy(T t);
/**
* This method must be called from within the copy constructor
* to notify that the copy was created.
*
*
* When your pipe has references to other pipes,
* it's particularly important to call this method
* before you start copying the pipes you refer to,
* or else there's a chance of inifinite loop.
*/
public abstract void add(Tube original, Tube copy);
}