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Micro Distribution of the Payara Project

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 *    Copyright (c) [2017] Payara Foundation and/or its affiliates. All rights reserved.
 * 
 *     The contents of this file are subject to the terms of either the GNU
 *     General Public License Version 2 only ("GPL") or the Common Development
 *     and Distribution License("CDDL") (collectively, the "License").  You
 *     may not use this file except in compliance with the License.  You can
 *     obtain a copy of the License at
 *     https://github.com/payara/Payara/blob/master/LICENSE.txt
 *     See the License for the specific
 *     language governing permissions and limitations under the License.
 * 
 *     When distributing the software, include this License Header Notice in each
 *     file and include the License file at glassfish/legal/LICENSE.txt.
 * 
 *     GPL Classpath Exception:
 *     The Payara Foundation designates this particular file as subject to the "Classpath"
 *     exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 *     file that accompanied this code.
 * 
 *     Modifications:
 *     If applicable, add the following below the License Header, with the fields
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 * 
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 *     only the GPL Version 2, indicate your decision by adding "[Contributor]
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 *     Version 2] license."  If you don't indicate a single choice of license, a
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 */
package fish.payara.nucleus.microprofile.config.converters;

import java.time.temporal.ChronoUnit;
import javax.annotation.Priority;
import org.eclipse.microprofile.config.inject.ConfigProperty;
import org.eclipse.microprofile.config.spi.Converter;

/**
 * Converter for Strings to ChronoUnits
 * @author Andrew Pielage
 */
@Priority(1)
public class ChronoUnitConverter implements Converter {
    @Override
    public ChronoUnit convert(String value) {
        if (value == null || value.equals(ConfigProperty.UNCONFIGURED_VALUE)) {
            return null;
        }
        
        return ChronoUnit.valueOf(value);
    }
}