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Jodd BeanUtil is fast and powerful bean manipulation library.
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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package jodd.typeconverter.impl;
import jodd.typeconverter.TypeConversionException;
import jodd.typeconverter.TypeConverter;
import jodd.util.StringUtil;
/**
* Converts given object to Double
.
* Conversion rules:
*
* null
value is returned as null
* - object of destination type is simply casted
* - object is converted to string, trimmed, and then converted if possible.
*
* Number string may start with plus and minus sign.
*/
public class DoubleConverter implements TypeConverter {
public Double convert(final Object value) {
if (value == null) {
return null;
}
if (value.getClass() == Double.class) {
return (Double) value;
}
if (value instanceof Number) {
return Double.valueOf(((Number)value).doubleValue());
}
if (value instanceof Boolean) {
return ((Boolean) value).booleanValue() ? Double.valueOf(1) : Double.valueOf(0);
}
try {
String stringValue = value.toString().trim();
if (StringUtil.startsWithChar(stringValue, '+')) {
stringValue = stringValue.substring(1);
}
return Double.valueOf(stringValue);
} catch (NumberFormatException nfex) {
throw new TypeConversionException(value, nfex);
}
}
}