ActionPromptProvider.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.isis.viewer.wicket.model.models;

import org.apache.wicket.Component;
import org.apache.wicket.Page;

public interface ActionPromptProvider {

    public static class Util{

        public static ActionPromptProvider getFrom(Component component) {
            final Page page = component.getPage();
            if(page == null) {
                throw new IllegalArgumentException("Programming error: component must be added to a page in order to locate the ActionPromptProvider");
            }
            return getFrom(page);
        }
        public static ActionPromptProvider getFrom(Page page) {
            if(page instanceof ActionPromptProvider) {
                final ActionPromptProvider provider = (ActionPromptProvider) page;
                return provider;
            }
            // else
            throw new IllegalArgumentException("Programming error: all pages should inherit from PageAbstract, which serves as the ActionPromptProvider");
        }
    }

    public ActionPrompt getActionPrompt();
}