samples/dci/src/main/java/org/apache/polygene/dci/moneytransfer/context/Role.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 org.apache.polygene.dci.moneytransfer.context;

/**
 * TODO
 */

/**
 * Base class for methodful roles
 */
public class Role<T>
    implements Comparable<Role<T>>
{
    // Self reference to the bound Data object
    protected T self;

    public Role()
    {
    }

    public Role( T self )
    {
        this.self = self;
    }

    public void bind( T newSelf )
    {
        self = newSelf;
    }

    public T self()
    {
        return self;
    }

    @Override
    public boolean equals( Object obj )
    {
        if( obj == null )
        {
            return false;
        }

        if( obj instanceof Role )
        {
            return self.equals( ( (Role) obj ).self );
        }
        else
        {
            return false;
        }
    }

    public int compareTo( Role<T> role )
    {
        return ( (Comparable<T>) self ).compareTo( role.self );
    }
}