samples/dci/src/main/java/org/qi4j/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.qi4j.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 );
    }
}