gdata to java object mapping

hi I started learning google data api. I have one question What will be the best way of parsing xml google data xml ?

1 > Should I go with manually parsing xml ?

Or

2 > XML to java object mapping technique ?

I am thinkin开发者_如何学运维g about going with 2 way, As it will require writing less code from my side. But I don't know how slow it will be in comparison to 1 way.

How slow is xml to java mapping technique ?

Is there any other better way to parse gdata xml ?

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How slow is xml to java mapping technique ?

The answer to this question depends on what you are comparing the xml to Java mapping technique to. Many object-to-XML solutions have been around for quite a while and have learned a number of tricks to do this conversion.

Is there any other better way to parse gdata xml ?

Note: I'm the EclipseLink JAXB (MOXy) lead, and a member of the JAXB (JSR-222) expert group.

I'm not that familiar with the Google Data API, but after a quick google, it appears to be related to Atom which can easily be handled by any of the JAXB implementations:

• Metro (reference implementation included in Java SE 6)
• EclipseLink JAXB (MOXy)
• Apache JaxMe

For an Atom example see:

• http://bdoughan.blogspot.com/2010/09/processing-atom-feeds-with-jaxb.html

With JAXB you can also start with your own object model and add annotations to apply the XML mapping:

• http://bdoughan.blogspot.com/2010/11/jaxb-and-inheritance-using-substitution.html
• http://bdoughan.blogspot.com/2010/10/jaxb-and-xsd-choice-xmlelements.html
• http://bdoughan.blogspot.com/2010/09/jaxb-collection-properties.html

MOXy also contains an XPath mapping extension that makes mapping your object model even easier:

• http://bdoughan.blogspot.com/2010/09/xpath-based-mapping-geocode-example.html

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Take a look at Caster project. Judging from your question, i don't think you would want to go though the trouble to parse the XML using the correct schema and create POJO's to match them (which is troublesome anyway).

I used Caster sometime ago, it is not the best, but got my problem solved pretty fast.

http://www.castor.org/