JDOM Document adapter to InputStream

[Brian J. Sayatovic]

I have a need to adapt a JDOM Document to an InputStream. I am building the Document in memory, but then need to serve it via a Java Activation Framework DataSource which deals in InputStreams. Normally, JDOM prefers to write to OutputStreams directly, but that will not fit this case.

Currently, I'm writing the whole Document to a ByteArrayOutputStream and then using the generated byte to back a ByteArrayInputStream. This is a lot of extra work that is consuming memory and wasting time.

I can vaguely conceive of how to write my own adapter, but I was hoping someone else has already tackled this.

Any ideas?

Regards,
Brian.

 

[Stanimir Stamenkov]

/Brian J. Sayatovic/:

I have a need to adapt a JDOM Document to an InputStream. I am building the Document in memory, but then need to serve it via a Java Activation Framework DataSource which deals in InputStreams. Normally, JDOM prefers to write to OutputStreams directly, but that will not fit this case.

Currently, I'm writing the whole Document to a ByteArrayOutputStream and then using the generated byte to back a ByteArrayInputStream. This is a lot of extra work that is consuming memory and wasting time.

I can vaguely conceive of how to write my own adapter, but I was hoping someone else has already tackled this.

Any ideas?

There are piped streams (java.io.PipedOutputStream /
java.io.PipedInputStream). Note you must use two threads - the one where you're feeding the data through the output and the other reading and processing it through the input.

 

[GIMME]

Any ideas?
Write your JDOM object to a String variable with XMLOutputter's outputString method. Then create an InputStream from something like String's NewStringReader.