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1   /**
2    * This file Copyright (c) 2003-2010 Magnolia International
3    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
4    *
5    *
6    * This file is dual-licensed under both the Magnolia
7    * Network Agreement and the GNU General Public License.
8    * You may elect to use one or the other of these licenses.
9    *
10   * This file is distributed in the hope that it will be
11   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12   * implied warranty of MERCHANTABILITY or FITNESS FOR A
13   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14   * Redistribution, except as permitted by whichever of the GPL
15   * or MNA you select, is prohibited.
16   *
17   * 1. For the GPL license (GPL), you can redistribute and/or
18   * modify this file under the terms of the GNU General
19   * Public License, Version 3, as published by the Free Software
20   * Foundation.  You should have received a copy of the GNU
21   * General Public License, Version 3 along with this program;
22   * if not, write to the Free Software Foundation, Inc., 51
23   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24   *
25   * 2. For the Magnolia Network Agreement (MNA), this file
26   * and the accompanying materials are made available under the
27   * terms of the MNA which accompanies this distribution, and
28   * is available at http://www.magnolia-cms.com/mna.html
29   *
30   * Any modifications to this file must keep this entire header
31   * intact.
32   *
33   */
34  package info.magnolia.cms.gui.dialog;
35  
36  import info.magnolia.cms.core.Content;
37  
38  import java.io.IOException;
39  import java.io.Writer;
40  
41  import javax.jcr.RepositoryException;
42  import javax.servlet.http.HttpServletRequest;
43  import javax.servlet.http.HttpServletResponse;
44  
45  
46  /**
47   * Interface for dialogs. A Magnolia Dialog should at least implements the <code>drawHtml</code> method to add html
48   * code to a page. Dialogs must have an empty constructor; the <code>init(Content, Content, PageContext)</code> is
49   * assured to be called before any other operation.
50   * @author Vinzenz Wyser
51   * @version 2.0
52   */
53  public interface DialogControl {
54  
55      /**
56       * Initialize a Dialog. This method is guaranteed to be called just after the control instantiation.
57       * @param request current HttpServletRequest
58       * @param response current HttpServletResponse
59       * @param websiteNode current website node
60       * @param configNode configuration node for the dialog
61       * @throws RepositoryException
62       */
63      void init(HttpServletRequest request, HttpServletResponse response, Content websiteNode, Content configNode)
64          throws RepositoryException;
65  
66      /**
67       * Actually draw the dialog content.
68       * @param out Writer
69       * @throws IOException exceptions thrown when writing to the Writer can be safely rethrown by the dialog
70       */
71      void drawHtml(Writer out) throws IOException;
72  
73  }