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Java > Open Source Codes > org > apache > tapestry > event > PageValidateListener


1 // Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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15 package org.apache.tapestry.event;
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17 import java.util.EventListener JavaDoc;
18
19 /**
20  * An interface for objects that want to take part in the validation of the page.
21  *
22  * @author Mindbridge
23  * @since 3.0
24  **/

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26 public interface PageValidateListener extends EventListener JavaDoc
27 {
28     /**
29      * Invoked by the page from its
30      * {@link org.apache.tapestry.IPage#validate(org.apache.tapestry.IRequestCycle)} method.
31      *
32      * <p>May throw a {@link org.apache.tapestry.PageRedirectException}, to redirect the user
33      * to an appropriate part of the system (such as, a login page).
34      **/

35
36     public void pageValidate(PageEvent event);
37 }
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