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This section assumes you are already familiar with the mapping file concepts documented in previous sections.
Bean IO is similar to other OXM (Object to XML Mapping) libraries, except that it is also capable of marshalling and unmarshalling extremely large XML files by reading and writing Java beans one record at a time.
Before diving into the details, let's start with a basic example using the employee input file from Section 2.1 after it's been converted to XML (shown below).
so that the XML document can be properly completed.
Where noted, legacy behavior can be restored using value for a group, record or field can be overridden using property values. To get started with Bean IO, download the latest stable version from Google Code, extract the contents of the ZIP file, and add to your application's classpath. In order to process XML formatted streams, Bean IO also requires an XML parser based on the Streaming API for XML (St AX), as specified by JSR 173.
JDK 1.6 and higher includes a St AX implementation and therefore does not require any additional libraries.
In many cases, further reads from the input stream will be unsuccessful.When field trimming is enabled, , all validations are performed after the field's text has first been trimmed.Field validations are ignored when writing to an output stream.The first pass can use a SAX parser or other means to validate the XML, and the second pass can use Bean IO to parse and process bean objects read from the document.Each Bean IO mapping component (stream, group, record, segment and field), is mapped to an XML element with the same local name. does not match the XML element name, the attribute can be used.