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Castor Help with unmarshalling

 
Sree Potluri
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HI,

I am new to Castor and trying the example "http://www.ibm.com/developerworks/xml/library/x-xjavacastor3/". I created a web application and inside have a package as specified in the example and put all the files, Author.java, Book.java, BookMapUnmarshaller.java, book-mapping.xml, book.xml. I made a small change in book.xml to match my xml struture and when I run the file, BookMapUnmarshaller.java, I get the error

Book ISBN: null
Book Title: null
null
java.lang.NullPointerException
at javaapplication1.BookMapUnmarshaller.main(BookMapUnmarshaller.java:26)

Author.java

Book.java

BookMapUnmarshaller.java

book.xml
book-mapping.xml
 
Sree Potluri
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Please help
 
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