/*
* $Id: StringToNumber.java 20320 2010-11-24 15:03:31Z dfeist $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.transformer.simple;
import org.mule.api.transformer.DataType;
import org.mule.api.transformer.DiscoverableTransformer;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.AbstractTransformer;
import org.mule.transformer.types.DataTypeFactory;
import org.mule.transformer.types.SimpleDataType;
import org.mule.util.NumberUtils;
import java.text.NumberFormat;
/**
* <code>StringToNumber</code> converts a String to a Number. A NumberFormat is used
* if one is provided.
*/
public class StringToNumber extends AbstractTransformer implements DiscoverableTransformer
{
private NumberFormat numberFormat;
/**
* Give core transformers a slighty higher priority
*/
private int priorityWeighting = DiscoverableTransformer.DEFAULT_PRIORITY_WEIGHTING + 1;
public StringToNumber()
{
registerSourceType(new SimpleDataType<Object>(String.class));
setReturnDataType(DataTypeFactory.create(Number.class));
}
public StringToNumber(NumberFormat numberFormat)
{
this();
this.numberFormat = numberFormat;
}
@SuppressWarnings("unchecked")
@Override
public Object doTransform(Object src, String encoding) throws TransformerException
{
if (src == null)
{
return null;
}
else
{
if (numberFormat != null)
{
try
{
return NumberUtils.convertNumberToTargetClass(numberFormat.parse((String) src),
getReturnClass());
}
catch (Exception e)
{
throw new TransformerException(this, e);
}
}
else
{
return NumberUtils.parseNumber((String) src, getReturnClass());
}
}
}
@SuppressWarnings({"unchecked"})
@Override
public Class<? extends Number> getReturnClass()
{
return (Class<Number>) super.getReturnDataType().getType();
}
@Override
public void setReturnDataType(DataType<?> type)
{
if (!Number.class.isAssignableFrom(type.getType()))
{
throw new IllegalArgumentException("This transformer only supports Number return types.");
}
else
{
super.setReturnDataType(type);
}
}
public int getPriorityWeighting()
{
return priorityWeighting;
}
public void setPriorityWeighting(int priorityWeighting)
{
this.priorityWeighting = priorityWeighting;
}
}