001/*
002 * ModeShape (http://www.modeshape.org)
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *       http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.modeshape.schematic.document;
017
018/**
019 * Representation of a set of changes made to a document.
020 * 
021 * @author Randall Hauch <rhauch@redhat.com> (C) 2011 Red Hat Inc.
022 */
023public interface Changes {
024
025    /**
026     * Determine if there are any changes.
027     * 
028     * @return true if there is at least one change, or false if there are none
029     */
030    boolean isEmpty();
031
032    /**
033     * Obtain a clone of these changes.
034     * 
035     * @return the clone of these changes; never null
036     */
037    Changes clone();
038}