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A library that extends FreeMarker with support for the Java Date/Time API

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/*
 * Copyright (c) 2015-2024 Jakob Vad Nielsen
 *
 * 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 no.api.freemarker.java8.time;

import freemarker.template.TemplateMethodModelEx;
import freemarker.template.TemplateModelException;
import no.api.freemarker.java8.zone.ZoneStrategy;

import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.List;

import static no.api.freemarker.java8.time.DateTimeTools.createDateTimeFormatter;

public class ZonedDateTimeFormatter extends AbstractFormatter implements TemplateMethodModelEx {

    public ZonedDateTimeFormatter(ZonedDateTime obj, ZoneStrategy strategy) {
        super(obj, strategy);
    }

    @Override
    public Object exec(final List list) throws TemplateModelException {

        final ZoneId targetZoneId = getTargetZoneId(list, getObject().getZone());

        if (isDifferentTimeZoneRequested(targetZoneId)) {
            return getObject().withZoneSameInstant(targetZoneId)
                              .format(createDateTimeFormatter(list, 0, DefaultFormatters.getZonedDateTimeFormatter()));
        } else {
            return getObject()
                  .format(createDateTimeFormatter(list, 0, DefaultFormatters.getZonedDateTimeFormatter()));
        }
    }

    private boolean isDifferentTimeZoneRequested(ZoneId zoneId) {
        return !getObject().getZone().equals(zoneId);
    }
}