com.hihframework.core.utils.CurrencyConverter.java Source code

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Here is the source code for com.hihframework.core.utils.CurrencyConverter.java

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/**
 * Copyright (c) 2013-2015 www.javahih.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.hihframework.core.utils;

import java.text.DecimalFormat;
import java.text.ParseException;

import org.apache.log4j.*;
import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.lang.StringUtils;

/**
 * <p> Title:??</p>
 * <p> Description:???100200.00</p>
 * <p> Copyright: Copyright (c) 2013 </p>
 * <p> Company:hihsoft.co.,ltd</p>
 *  @author hihsoft.co.,ltd
 * @version 1.0
 */
public class CurrencyConverter {
    protected static final Logger log = Logger.getLogger(CurrencyConverter.class);

    protected final DecimalFormat formatter = new DecimalFormat("###,###.00");

    /**
     * Convert a String to a Double and a Double to a String
     *
     * @param type the class type to output
     * @param value the object to convert
     * @return object the converted object (Double or String)
     */
    public final Object convert(final Class<?> type, final Object value) {
        // for a null value, return null
        if (value == null) {
            return null;
        } else {
            if (value instanceof String) {
                if (log.isDebugEnabled()) {
                    log.debug("value (" + value + ") instance of String");
                }

                try {
                    if (StringUtils.isNotEmpty(String.valueOf(value))) {
                        return null;
                    }

                    if (log.isDebugEnabled()) {
                        log.debug("converting '" + value + "' to a decimal");
                    }

                    //formatter.setDecimalSeparatorAlwaysShown(true);
                    Number num = formatter.parse(String.valueOf(value));

                    return new Double(num.doubleValue());
                } catch (ParseException pe) {
                    pe.printStackTrace();
                }
            } else if (value instanceof Double) {
                if (log.isDebugEnabled()) {
                    log.debug("value (" + value + ") instance of Double");
                    log.debug("returning double: " + formatter.format(value));
                }

                return formatter.format(value);
            }
        }

        throw new ConversionException("Could not convert " + value + " to " + type.getName() + "!");
    }
}