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 // Copyright 2004, 2005 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;
An interface that defines an object that can store named propertys. The names and the properties are Strings.

Author(s):
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.

Prior to release 2.2, this method returned Collection.

    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.
    void setProperty(String nameString value);

    
Removes the named property, if present.
    void removeProperty(String name);

    
Retrieves the named property, or null if the property is not defined.
    String getProperty(String name);
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