/*
* Copyright (c) 2005-2011 Grameen Foundation USA
* All rights reserved.
*
* 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.
*
* See also http://www.apache.org/licenses/LICENSE-2.0.html for an
* explanation of the license and how it is applied.
*/
package org.mifos.framework.formulaic;
/*
* This validator transforms a string into its matching enum, given an Enum
* class to look up values in. The validator assumes that individual enums are
* given uppercased names, and matches the given strings in a case-insensitive manner,
* keeping with current mifos style.
*/
public class EnumValidator extends IsInstanceValidator {
public static final String INVALID_ENUM_ERROR = "invalidenum";
private Class enumType;
private String fieldName;
public EnumValidator(Class enumType) {
super(String.class);
assert enumType != null;
assert enumType.isEnum();
this.enumType = enumType;
}
public EnumValidator(Class enumType, String fieldName) {
super(String.class);
assert enumType != null;
assert enumType.isEnum();
this.enumType = enumType;
this.fieldName = fieldName;
}
@Override
public Enum validate(Object input) throws ValidationError {
input = super.validate(input);
try {
String inputString = ((String) input).toUpperCase();
return Enum.valueOf(enumType, inputString);
} catch (IllegalArgumentException e) {
if (fieldName == null) {
throw makeError(input, ErrorType.INVALID_ENUM);
} else {
throw makeError(input, ErrorType.INVALID_ENUM, fieldName);
}
}
}
}