Spring batch: read xml as DOM Document
I want to read a large xml file which includes n number of elements ‘elem1’. n can be up to 10.000 or more. I want to read each eleme1 as a DOM document, process it and read next elem1 etc. All articles I found so far suggest using StaxEventItemReader. But I don’t want to map the peeked ‘elem1’ to an object but a DOM document. The reason is, that the business logic which I want to integrate in proccessor allready exists. The logic handles with a DOM Document(reading Nodes etc..). However StaxEventItemReader expects a class type to map the read data to. Is there any way to read data just as a dom document? I was thinking of a multiline records reader and defining open/close tags as tockenizers. But I don’t know if this is possible and whether it is the right way?
<root> <elem1> <a>...</a> <b>...</b> </elem1> <elem1> <a>...</a> <b>...</b> <c>...</c> </elem1> </root> 
Since you are able to parse a string element into a DOM object, you can proceed as follows:
- Use a
StaxEventItemReader<String>to read string elements - Use a processor to transform string items into DOM items
- Add another processor (in a composite processor) to process DOM items as needed (call the business logic that you already have and which expects DOM items)
