/*
* Copyright 2004-2010 the Seasar Foundation and the Others.
*
* 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.slim3.controller.validator;
import java.util.Map;
import org.slim3.util.ApplicationMessage;
/**
* A validator for a byte value.
*
* @author higa
* @since 1.0.0
*
*/
public class ByteTypeValidator extends AbstractValidator {
/**
* The instance.
*/
public static ByteTypeValidator INSTANCE = new ByteTypeValidator();
/**
* Constructor.
*/
public ByteTypeValidator() {
super();
}
/**
* Constructor.
*
* @param message
*/
public ByteTypeValidator(String message) {
super(message);
}
public String validate(Map<String, Object> parameters, String name) {
Object value = parameters.get(name);
if (value == null || "".equals(value)) {
return null;
}
try {
String s = (String) value;
Byte.valueOf(s);
return null;
} catch (Throwable ignore) {
if (message != null) {
return message;
}
return ApplicationMessage.get(getMessageKey(), getLabel(name));
}
}
@Override
protected String getMessageKey() {
return "validator.byteType";
}
}