org.databene.commons.converter.String2CharConverter Maven / Gradle / Ivy

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/*
 * Copyright (C) 2004-2014 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");
    	}
    }

}