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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
* 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.
*/
package org.databene.commons.converter;
import org.databene.commons.ConversionException;
/**
* Instantiates enum instances by their name.
* Created: 20.08.2007 07:11:16
* @param the enumeration type to convert to
* @author Volker Bergmann
*/
@SuppressWarnings("rawtypes")
public class String2EnumConverter extends ThreadSafeConverter {
public String2EnumConverter(Class enumClass) {
super(String.class, enumClass);
}
@Override
public E convert(String sourceValue) throws ConversionException {
return convert(sourceValue, targetType);
}
public static T convert(String sourceValue, Class enumClass) throws ConversionException {
if (sourceValue == null)
return null;
T[] enumConstants = enumClass.getEnumConstants();
for (T enumConstant : enumConstants)
if (enumConstant.name().equals(sourceValue))
return enumConstant;
throw new ConversionException(enumClass + " does not have an instance of name " + sourceValue);
}
}