com.github.mygreen.supercsv.cellprocessor.constraint.UniqueFactory Maven / Gradle / Ivy

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package com.github.mygreen.supercsv.cellprocessor.constraint;

import java.util.Optional;

import org.supercsv.cellprocessor.ift.CellProcessor;

import com.github.mygreen.supercsv.annotation.constraint.CsvUnique;
import com.github.mygreen.supercsv.builder.Configuration;
import com.github.mygreen.supercsv.builder.FieldAccessor;
import com.github.mygreen.supercsv.cellprocessor.ConstraintProcessorFactory;
import com.github.mygreen.supercsv.cellprocessor.format.TextFormatter;

/**
 * アノテーション{@link CsvUnique}をハンドリングして、CellProcessorの{@link Unique}を作成する。
 * 
 * @since 2.0
 * @author T.TSUCHIE
 *
 */
public class UniqueFactory implements ConstraintProcessorFactory {
    
    @Override
    public Optional create(final CsvUnique anno, final Optional next,
            final FieldAccessor field, final TextFormatter formatter, final Configuration config) {
        
        @SuppressWarnings("unchecked")
        final TextFormatter typeFormatter = (TextFormatter)formatter;
        
        final Unique processor = next.map(n -> new Unique(typeFormatter, n))
                .orElseGet(() -> new Unique(typeFormatter));
        
        processor.setValidationMessage(anno.message());
        
        return Optional.of(processor);
    }
    
}