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An annotation processor for generating type-safe bean mappers

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/*
 * Copyright MapStruct Authors.
 *
 * Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
 */
package org.mapstruct.ap.internal.conversion;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.util.Date;
import java.util.Set;

import org.mapstruct.ap.internal.model.common.ConversionContext;
import org.mapstruct.ap.internal.model.common.Type;
import org.mapstruct.ap.internal.util.Collections;

import static org.mapstruct.ap.internal.conversion.ConversionUtils.date;
import static org.mapstruct.ap.internal.conversion.ConversionUtils.localDateTime;
import static org.mapstruct.ap.internal.conversion.ConversionUtils.zoneId;
import static org.mapstruct.ap.internal.conversion.ConversionUtils.zoneOffset;

/**
 * SimpleConversion for mapping {@link java.time.LocalDateTime} to
 * {@link java.util.Date} and vice versa.
 */
public class JavaLocalDateTimeToDateConversion extends SimpleConversion {

    @Override
    protected String getToExpression(ConversionContext conversionContext) {
        return date( conversionContext )
            + ".from( .toInstant( "
            + zoneOffset( conversionContext )
            + ".UTC ) )";
    }

    @Override
    protected Set getToConversionImportTypes(ConversionContext conversionContext) {
        return Collections.asSet(
            conversionContext.getTypeFactory().getType( Date.class ),
            conversionContext.getTypeFactory().getType( ZoneOffset.class )
        );
    }

    @Override
    protected String getFromExpression(ConversionContext conversionContext) {
        return localDateTime( conversionContext )
            + ".ofInstant( .toInstant(), "
            + zoneId( conversionContext )
            + ".of( \"UTC\" ) )";
    }

    @Override
    protected Set getFromConversionImportTypes(ConversionContext conversionContext) {
        return Collections.asSet(
            conversionContext.getTypeFactory().getType( LocalDateTime.class ),
            conversionContext.getTypeFactory().getType( ZoneId.class )
        );
    }
}