/*
* $Id: HttpRequestToBook.java 19250 2010-08-30 16:53:14Z dirk.olmes $
* --------------------------------------------------------------------------------------
* 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.example.bookstore.transformers;
import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.example.bookstore.Book;
import org.mule.example.bookstore.BookstoreAdminMessages;
import org.mule.transformer.AbstractMessageTransformer;
import org.mule.transformer.types.DataTypeFactory;
import org.mule.util.StringUtils;
/**
* Transforms a Map of HttpRequest parameters into a Book object.
* The request parameters are always strings (they come from the HTML form),
* so we need to parse and convert them to their appropriate types.
*/
public class HttpRequestToBook extends AbstractMessageTransformer
{
public HttpRequestToBook()
{
super();
registerSourceType(DataTypeFactory.OBJECT);
setReturnDataType(DataTypeFactory.create(Book.class));
}
@Override
public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException
{
String author = message.getInboundProperty("author");
String title = message.getInboundProperty("title");
String price = message.getInboundProperty("price");
if (StringUtils.isBlank(author))
{
throw new TransformerException(BookstoreAdminMessages.missingAuthor(), this);
}
if (StringUtils.isBlank(title))
{
throw new TransformerException(BookstoreAdminMessages.missingTitle(), this);
}
if (StringUtils.isBlank(price))
{
throw new TransformerException(BookstoreAdminMessages.missingPrice(), this);
}
return new Book(author, title, Double.parseDouble(price));
}
}