// Copyright 2007 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;
/**
* Callback interface that allows for visiting the option groups and option models of a select model
* in correct render order.
*/
public interface SelectModelVisitor
{
/**
* Invoked once for each {@link OptionGroupModel}, just before invoking
* {@link #option(OptionModel)} for each embedded option within the group.
*/
void beginOptionGroup(OptionGroupModel groupModel);
/**
* Invoked for each option within a group, and at the end, for each ungrouped option.
*
* @param optionModel
*/
void option(OptionModel optionModel);
/**
* Invoked after all options within the group have been visited.
*/
void endOptionGroup(OptionGroupModel groupModel);
}
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