// 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;
import java.util.Iterator;
import org.apache.hivemind.service.ThreadLocale;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.coerce.ValueConverter;
import org.apache.tapestry.form.validator.Validator;
import org.apache.tapestry.valid.ValidatorException;
/**
* Default {@link ValidatableFieldSupport} implementation. This implementation generates calls to a
* static javascript function during render if client-side validation is enabled.
*
* @author Paul Ferraro
* @since 4.0
*/
public class ValidatableFieldSupportImpl implements ValidatableFieldSupport
{
private ValueConverter _converter;
private ThreadLocale _threadLocale;
public void setValueConverter(ValueConverter converter)
{
_converter = converter;
}
public void setThreadLocale(ThreadLocale threadLocale)
{
_threadLocale = threadLocale;
}
protected Iterator getValidatorsIterator(ValidatableField component)
{
return (Iterator) _converter.coerceValue(component.getValidators(), Iterator.class);
}
/**
* @see org.apache.tapestry.form.ValidatableFieldSupport#renderContributions(ValidatableField, IMarkupWriter, IRequestCycle)
*/
public void renderContributions(ValidatableField component, IMarkupWriter writer,
IRequestCycle cycle)
{
ValidatableFieldExtension extension = null;
if (ValidatableFieldExtension.class.isInstance(component))
extension = (ValidatableFieldExtension)component;
if (component.getForm().isClientValidationEnabled())
{
FormComponentContributorContext context = new FormComponentContributorContextImpl(
_threadLocale.getLocale(), cycle, component);
Iterator validators = getValidatorsIterator(component);
while (validators.hasNext())
{
Validator validator = (Validator) validators.next();
if (extension != null && extension.overrideValidator(validator, cycle))
extension.overrideContributions(validator, context, writer, cycle);
else
validator.renderContribution(writer, cycle, context, component);
}
}
}
/**
* @see org.apache.tapestry.form.ValidatableFieldSupport#validate(org.apache.tapestry.form.ValidatableField, org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle, java.lang.Object)
*/
public void validate(ValidatableField component, IMarkupWriter writer, IRequestCycle cycle, Object object) throws ValidatorException
{
boolean isNonNull = (object != null);
Iterator validators = getValidatorsIterator(component);
ValidationMessages messages = new ValidationMessagesImpl(component, _threadLocale.getLocale());
while (validators.hasNext())
{
Validator validator = (Validator) validators.next();
if (isNonNull || validator.getAcceptsNull())
validator.validate(component, messages, object);
}
}
public boolean isRequired(ValidatableField field)
{
Iterator i = getValidatorsIterator(field);
while (i.hasNext())
{
Validator validator = (Validator) i.next();
if (validator.isRequired())
return true;
}
return false;
}
}