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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

/*
 * Min.java
 * created in 2012/09/22
 *
 * (C) Copyright 2003-2012 GreenDay Project. All rights reserved.
 */
package org.supercsv.ext.cellprocessor.constraint;

import java.util.HashMap;
import java.util.Map;

import org.supercsv.cellprocessor.CellProcessorAdaptor;
import org.supercsv.cellprocessor.ift.CellProcessor;
import org.supercsv.cellprocessor.ift.DoubleCellProcessor;
import org.supercsv.cellprocessor.ift.LongCellProcessor;
import org.supercsv.exception.SuperCsvConstraintViolationException;
import org.supercsv.ext.cellprocessor.ift.ValidationCellProcessor;
import org.supercsv.util.CsvContext;


/**
 * @author T.TSUCHIE
 *
 */
public class Min> extends CellProcessorAdaptor
        implements LongCellProcessor, DoubleCellProcessor, ValidationCellProcessor {
    
    protected final T min;
    
    public Min(final T min) {
        super();
        checkPreconditions(min);
        this.min = min;
    }
    
    public Min(final T min, final CellProcessor next) {
        super(next);
        checkPreconditions(min);
        this.min = min;
    }
    
    protected static > void checkPreconditions(final T min) {
        if(min == null) {
            throw new IllegalArgumentException("min should not be null");
        }
    }
    
    @SuppressWarnings("unchecked")
    @Override
    public Object execute(final Object value, final CsvContext context) {
        
        validateInputNotNull(value, context);
        
        if(!(value instanceof Comparable)) {
            throw new SuperCsvConstraintViolationException(String.format(
                    "the value '%s' could not implement Comparable interface.",
                    value), context, this);
        }
        
        final T result = ((T) value);
        
        if(result.compareTo(min) < 0) {
            throw new SuperCsvConstraintViolationException(
                    String.format("%s does not lie the min (%s) values (inclusive)", result, min),
                    context, this);
        }
            
        return next.execute(result, context);
    }
    
    public T getMin() {
        return min;
    }
    
    @Override
    public String getMessageCode() {
        return Min.class.getCanonicalName() + ".violated";
    }
    
    @Override
    public Map getMessageVariable() {
        Map vars = new HashMap();
        vars.put("min", getMin());
        return vars;
    }
    
    @Override
    public String formatValue(final Object value) {
        if(value == null) {
            return "";
        }
        return value.toString();
    }
    
}