net.jofm.format.NumberFormat.java Source code

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Here is the source code for net.jofm.format.NumberFormat.java

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/*
 * Copyright 2008 (C) Chunyun Zhao(Chunyun.Zhao@gmail.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.jofm.format;

import java.math.BigDecimal;
import java.text.DecimalFormat;

import net.jofm.FixedMappingException;

import org.apache.commons.lang.StringUtils;

/**
 * @author Chunyun Zhao
 * @since 1.0
 */
public class NumberFormat extends Format {
    public NumberFormat(Pad pad, char padWith, int length, String format) {
        super(pad, padWith, length, format);
    }

    @Override
    protected String doFormat(Object value) {
        if (StringUtils.isNotEmpty(format)) {
            DecimalFormat formatter = new DecimalFormat(format);
            return formatter.format(value);
        } else {
            return value.toString();
        }
    }

    @Override
    protected Object doParse(String value, Class<?> destinationClazz) {
        Number result;
        try {
            if (StringUtils.isNotEmpty(format)) {
                DecimalFormat formatter = new DecimalFormat(format);
                result = formatter.parse(value);
            } else {
                result = Double.valueOf(value);
            }
        } catch (Exception pe) {
            throw new FixedMappingException(
                    "Unable to parse the value '" + value + "' to number with format '" + format + "'");
        }

        return convert(result, destinationClazz);
    }

    private Object convert(Number result, Class<?> destinationClazz) {
        if (destinationClazz.equals(BigDecimal.class)) {
            return new BigDecimal(result.doubleValue());
        }
        if (destinationClazz.equals(Short.class) || destinationClazz.equals(short.class)) {
            return new Short(result.shortValue());
        }
        if (destinationClazz.equals(Integer.class) || destinationClazz.equals(int.class)) {
            return new Integer(result.intValue());
        }
        if (destinationClazz.equals(Long.class) || destinationClazz.equals(long.class)) {
            return new Long(result.longValue());
        }
        if (destinationClazz.equals(Float.class) || destinationClazz.equals(float.class)) {
            return new Float(result.floatValue());
        }
        if (destinationClazz.equals(Double.class) || destinationClazz.equals(double.class)) {
            return new Double(result.doubleValue());
        }

        throw new FixedMappingException("Unable to parse the data to type " + destinationClazz.getName() + " using "
                + this.getClass().getName());
    }
}