/*
 * 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.lenya.workflow;

/**
 * Interface for objects which can be workflowed.
 *
 * @version $Id$
 */
public interface Workflowable {

    /**
     * @return The versions in chronological order.
     */
    Version[] getVersions();
    
    /**
     * @return The latest version.
     */
    Version getLatestVersion();
    
    /**
     * Adds a new version.
     * @param workflow The workflow.
     * @param version The version.
     */
    void newVersion(Workflow workflow, Version version);
    
    /**
     * @return The URI to resolve the schema configuration from.
     */
    String getWorkflowSchemaURI();
    
}