/*******************************************************************************
 * Copyright (c) 2006, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

module org.eclipse.core.databinding.observable.set.SetDiff;

import java.lang.all;

import java.util.Set;

/**
 * @since 1.0
 *
 */
public abstract class SetDiff {
    
    /**
     * @return the set of added elements
     */
    public abstract Set getAdditions();
    
    /**
     * @return the set of removed elements
     */
    public abstract Set getRemovals();
    
    /**
     * @see java.lang.Object#toString()
     */
    public String toString() {
        StringBuffer buffer = new StringBuffer();
        buffer
            .append(Class.fromObject(this).getName())
            .append("{additions [") //$NON-NLS-1$
            .append(getAdditions() !is null ? getAdditions().toString() : "null") //$NON-NLS-1$
            .append("], removals [") //$NON-NLS-1$
            .append(getRemovals() !is null ? getRemovals().toString() : "null") //$NON-NLS-1$
            .append("]}"); //$NON-NLS-1$
        
        return buffer.toString();
    }
}