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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;
/**
* Converts {@link String}s of length 1 to {@link Character}s, Strings of length 0 to null.
* Created: 27.02.2010 10:16:03
* @since 0.5.0
* @author Volker Bergmann
*/
public class String2CharConverter extends ThreadSafeConverter {
public String2CharConverter() {
super(String.class, Character.class);
}
@Override
public Character convert(String sourceValue) throws ConversionException {
if (sourceValue == null)
return null;
switch (sourceValue.length()) {
case 0 : return null;
case 1 : return Character.valueOf(sourceValue.charAt(0));
default: throw new ConversionException("'" + sourceValue + "' cannot be converted to a character");
}
}
}