// 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.validator;
import org.apache.hivemind.util.PropertyUtils;
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.form.FormComponentContributorContext;
import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.form.TranslatedField;
import org.apache.tapestry.form.translator.Translator;
import org.apache.tapestry.json.JSONObject;
/**
* Abstract implementation of {@link org.apache.tapestry.form.validator.Validator}.
*
* @author Howard Lewis Ship
* @since 4.0
*/
public abstract class BaseValidator implements Validator
{
private String _message;
public BaseValidator()
{
}
public BaseValidator(String initializer)
{
PropertyUtils.configureProperties(this, initializer);
}
public String getMessage()
{
return _message;
}
public void setMessage(String message)
{
_message = message;
}
/**
* Returns false.
*/
public boolean getAcceptsNull()
{
return false;
}
/**
* Does nothing.
*/
public void renderContribution(IMarkupWriter writer, IRequestCycle cycle,
FormComponentContributorContext context, IFormComponent field)
{
}
/**
* Returns false. Subclasses may override.
*/
public boolean isRequired()
{
return false;
}
/**
* Utility method to store a field specific profile property which can later
* be used by client side validation.
*
* @param field
* The field to store the property for, will key off of {@link IFormComponent#getClientId()}.
* @param profile
* The profile for the form.
* @param key
* The property key to store.
* @param property
* The property to store.
*/
public void accumulateProfileProperty(IFormComponent field, JSONObject profile,
String key, Object property)
{
if (!profile.has(field.getClientId()))
profile.put(field.getClientId(), new JSONObject());
JSONObject fieldProps = profile.getJSONObject(field.getClientId());
accumulateProperty(fieldProps, key, property);
}
/**
* Utility used to append onto an existing property represented as an
* object array.
* @param profile
* @param key
* @param value
*/
public void accumulateProperty(JSONObject profile, String key, Object value)
{
profile.accumulate(key, value);
}
/**
* Used to grab the corresponding {@link Translator} for
* the field, if one exists.
* @param field
* @return The translator, or null if the required translator type
* doesn't exist.
*/
public Translator getFieldTranslator(IFormComponent field, Class clazz)
{
if (TranslatedField.class.isAssignableFrom(field.getClass())) {
Translator trans = ((TranslatedField)field).getTranslator();
if (clazz.isInstance(trans)) {
return trans;
}
}
return null;
}
}