001 /*
002 * This file is part of the Echo Point Project. This project is a collection
003 * of Components that have extended the Echo Web Application Framework.
004 *
005 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
006 *
007 * The contents of this file are subject to the Mozilla Public License Version
008 * 1.1 (the "License"); you may not use this file except in compliance with
009 * the License. You may obtain a copy of the License at
010 * http://www.mozilla.org/MPL/
011 *
012 * Software distributed under the License is distributed on an "AS IS" basis,
013 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
014 * for the specific language governing rights and limitations under the
015 * License.
016 *
017 * Alternatively, the contents of this file may be used under the terms of
018 * either the GNU General Public License Version 2 or later (the "GPL"), or
019 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
020 * in which case the provisions of the GPL or the LGPL are applicable instead
021 * of those above. If you wish to allow use of your version of this file only
022 * under the terms of either the GPL or the LGPL, and not to allow others to
023 * use your version of this file under the terms of the MPL, indicate your
024 * decision by deleting the provisions above and replace them with the notice
025 * and other provisions required by the GPL or the LGPL. If you do not delete
026 * the provisions above, a recipient may use your version of this file under
027 * the terms of any one of the MPL, the GPL or the LGPL.
028 */
029 package echopoint.able;
030
031
032 /**
033 * <code>Delegateable</code> is an interface where
034 * a something can act as a Delegate for a Component
035 * and hence get and set properties into the Component.
036 */
037 public interface Delegateable {
038 /**
039 * Retutns the rendered value of a property.
040 *
041 * @param propertyName -
042 * the named of as property as defined by this interface
043 * @return the rendered value of a property
044 */
045 public Object getRenderProperty(String propertyName);
046
047 /**
048 * Returns the rendered value of a property or a default value if its found
049 * to be null.
050 *
051 * @param propertyName -
052 * the named of as property as defined by this interface
053 * @param defaultValue -
054 * the default value if the property is null
055 *
056 * @return the rendered value of a property or a default value if its found
057 * to be null
058 */
059 public Object getRenderProperty(String propertyName, Object defaultValue);
060
061 }