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CSVのJavaライブラリであるSuperCSVに、アノテーション機能を追加したライブラリです。

There is a newer version: 2.3

package org.supercsv.ext.builder.joda;

import java.lang.annotation.Annotation;
import java.util.Optional;

import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormatter;
import org.supercsv.cellprocessor.ift.CellProcessor;
import org.supercsv.cellprocessor.joda.FmtLocalDate;
import org.supercsv.cellprocessor.joda.ParseLocalDate;
import org.supercsv.ext.annotation.CsvDateConverter;
import org.supercsv.ext.exception.SuperCsvInvalidAnnotationException;
import org.supercsv.ext.util.Utils;

/**
 * Joda-Timeの{@link LocalDate}型の{@link CellProcessor}のビルダクラス。
 * 
 * @since 1.2
 * @author T.TSUCHIE
 *
 */
public class LocalDateCellProcessorBuilder extends AbstractJodaCellProcessorBuilder {
    
    @Override
    protected String getDefaultPattern() {
        return "yyyy-MM-dd";
    }
    
    @Override
    public Optional parseValue(final Class type, final Annotation[] annos, final String strValue) {
        
        if(Utils.isEmpty(strValue)) {
            return Optional.empty();
        }
        
        final Optional converterAnno = getDateConverterAnnotation(annos);
        final DateTimeFormatter formatter = createDateTimeFormatter(converterAnno);
        
        final String pattern = getPattern(converterAnno);
        
        try {
            return Optional.of(LocalDate.parse(strValue, formatter));
            
        } catch(IllegalArgumentException e) {
            throw new SuperCsvInvalidAnnotationException(
                    String.format("default '%s' value cannot parse to LocalDate with pattern '%s'",
                            strValue, pattern), e);
            
        }
    }
    
    @Override
    public CellProcessor buildOutputCellProcessor(final Class type,final  Annotation[] annos,
            final CellProcessor processor, final boolean ignoreValidationProcessor) {
        
        final Optional converterAnno = getDateConverterAnnotation(annos);
        final DateTimeFormatter formatter = createDateTimeFormatter(converterAnno);
        
        final Optional min = getMin(converterAnno).map(s -> parseValue(type, annos, s).get());
        final Optional max = getMax(converterAnno).map(s -> parseValue(type, annos, s).get());
        
        CellProcessor cp = processor;
        cp = (cp == null ? new FmtLocalDate(formatter) : new FmtLocalDate(formatter, cp));
        
        if(!ignoreValidationProcessor) {
            cp = prependRangeProcessor(type, annos, cp, min, max);
        }
        
        return cp;
        
    }
    
    @Override
    public CellProcessor buildInputCellProcessor(final Class type, final Annotation[] annos,
            final CellProcessor processor) {
        
        final Optional converterAnno = getDateConverterAnnotation(annos);
        final DateTimeFormatter formatter = createDateTimeFormatter(converterAnno);
        
        final Optional min = getMin(converterAnno).map(s -> parseValue(type, annos, s).get());
        final Optional max = getMax(converterAnno).map(s -> parseValue(type, annos, s).get());
        
        CellProcessor cp = processor;
        cp = prependRangeProcessor(type, annos, cp, min, max);
        
        cp = (cp == null ? new ParseLocalDate(formatter) : new ParseLocalDate(formatter, cp));
        
        return cp;
    }
    
    
}