| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry.util; |
| |
| import java.util.List; |
| |
| /** |
| * An interface that defines an object that can store named propertys. The names |
| * and the properties are Strings. |
| * |
| * @version $Id$ |
| * @author Howard Lewis Ship |
| * |
| **/ |
| |
| public interface IPropertyHolder |
| { |
| /** |
| * Returns a List of Strings, the names of all |
| * properties held by the receiver. May return an empty list. |
| * The List is sorted alphabetically. The List may be modified |
| * without affecting this property holder. |
| * |
| * <p>Prior to release 2.2, this method returned Collection. |
| * |
| **/ |
| |
| public List getPropertyNames(); |
| |
| /** |
| * Sets a named property. The new value replaces the existing value, if any. |
| * Setting a property to null is the same as removing the property. |
| * |
| **/ |
| |
| public void setProperty(String name, String value); |
| |
| /** |
| * Removes the named property, if present. |
| * |
| **/ |
| |
| public void removeProperty(String name); |
| |
| /** |
| * Retrieves the named property, or null if the property is not defined. |
| * |
| **/ |
| |
| public String getProperty(String name); |
| } |