// Copyright 2006 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;
import java.io.Serializable;
/**
* An action that is associated with a component. This is used in several areas of Tapestry and is
* primarily an attempt to externalize state for a component so that it can be recorded outside the
* object.
* <p>
* ComponentActions should be immutable. They are often created during one request and associated
* with a particular component instance. They are then used in a later request (with an equivalent
* component instance).
* <p>
* ComponentActions are serializable (they are often serialized into Base64 strings for storage on
* the client).
*/
public interface ComponentAction<T> extends Serializable
{
/** Passed a component instance, the action should operate upon the instance. */
void execute(T component);
}
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