org.apache.isis.schema.utils.jaxbadapters.XmlCalendarFactory.java Source code

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Here is the source code for org.apache.isis.schema.utils.jaxbadapters.XmlCalendarFactory.java

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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.apache.isis.schema.utils.jaxbadapters;

import java.util.function.Function;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.LocalDateTime;
import org.joda.time.LocalTime;

class XmlCalendarFactory {

    public static XMLGregorianCalendar create(DateTime dateTime) {
        return dateTime != null
                ? withTypeFactoryDo(dtf -> dtf.newXMLGregorianCalendar(dateTime.toGregorianCalendar()))
                : null;
    }

    public static XMLGregorianCalendar create(LocalDateTime localDateTime) {
        return localDateTime != null ? withTypeFactoryDo(dtf -> dtf.newXMLGregorianCalendar(localDateTime.getYear(),
                localDateTime.getMonthOfYear(), localDateTime.getDayOfMonth(), localDateTime.getHourOfDay(),
                localDateTime.getMinuteOfHour(), localDateTime.getSecondOfMinute(),
                localDateTime.getMillisOfSecond(), DatatypeConstants.FIELD_UNDEFINED)) : null;
    }

    public static XMLGregorianCalendar create(LocalDate localDate) {
        return localDate != null
                ? withTypeFactoryDo(dtf -> dtf.newXMLGregorianCalendarDate(localDate.getYear(),
                        localDate.getMonthOfYear(), localDate.getDayOfMonth(), DatatypeConstants.FIELD_UNDEFINED))
                : null;
    }

    public static XMLGregorianCalendar create(LocalTime localTime) {
        return localTime != null
                ? withTypeFactoryDo(dtf -> dtf.newXMLGregorianCalendarTime(localTime.getHourOfDay(),
                        localTime.getMinuteOfHour(), localTime.getSecondOfMinute(), localTime.getMillisOfSecond(),
                        DatatypeConstants.FIELD_UNDEFINED))
                : null;
    }

    // -- HELPER

    /*
     * Gets an instance of DatatypeFactory and passes it to the factory argument for single use.
     * 
     * [ahuber] we don't want to store the DatatypeFactory.newInstance() into a static field for 
     * reuse, because then we would need to cleanup after IsisContext.destroy() as well.
     */
    private static XMLGregorianCalendar withTypeFactoryDo(Function<DatatypeFactory, XMLGregorianCalendar> factory) {

        final DatatypeFactory dataTypeFactory;

        try {

            dataTypeFactory = DatatypeFactory.newInstance();

        } catch (DatatypeConfigurationException e) {

            System.err.println("Within " + XmlCalendarFactory.class.getName() + ": "
                    + "Exception in call to DatatypeFactory.newInstance()" + e);
            return null;

        }

        return factory.apply(dataTypeFactory);

    }

}