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 // Copyright 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.form;
Implements the logic used by org.apache.tapestry.form.validator.Requireds for required field checking on rewind and generating client-side logic during render.

Author(s):
Paul Ferraro
Since:
4.0
public interface ValidatableFieldSupport
{
    
Called during render of the specified component. Renders any contributions from validators.
    void renderContributions(ValidatableField fieldIMarkupWriter writer,
            IRequestCycle cycle);

    
Called during rewind of the specified component. Specified value is validated using the component's validators.

    void validate(ValidatableField componentIMarkupWriter writerIRequestCycle cycleObject valuethrows ValidatorException;

    
Returns true if this component is required. This usually entails a search of the component's validators.
    boolean isRequired(ValidatableField field);
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