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* Copyright (c) 2012, salesforce.com, inc.
* All rights reserved.
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* that the following conditions are met:
*
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* following disclaimer.
*
* 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.
*
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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package com.salesforce.dataloader.dyna;
import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.Converter;
/**
* Converts Strings to Doubles
*
* @author Lexi Viripaeff
* @since 6.0
*/
public final class DoubleConverter implements Converter {
// ----------------------------------------------------------- Constructors
public DoubleConverter() {
this.defaultValue = null;
this.useDefault = false;
}
public DoubleConverter(Object defaultValue) {
this.defaultValue = defaultValue;
this.useDefault = true;
}
// ----------------------------------------------------- Instance Variables
/**
* The default value specified to our Constructor, if any.
*/
private Object defaultValue = null;
/**
* Should we return the default value on conversion errors?
*/
private boolean useDefault = true;
// --------------------------------------------------------- Public Methods
/**
* Convert the specified input object into an output object of the specified type.
*
* @param type
* Data type to which this value should be converted
* @param value
* The input value to be converted
* @exception ConversionException
* if conversion cannot be performed successfully
*/
@Override
public Object convert(Class type, Object value) {
if (value == null || String.valueOf(value).length() == 0) {
return null;
}
if (value instanceof Double) {
return (value);
} else if (value instanceof Number) { return new Double(((Number)value).doubleValue()); }
try {
return (new Double(value.toString()));
} catch (Exception e) {
if (useDefault) {
return (defaultValue);
} else {
throw new ConversionException(e);
}
}
}
}