Hello all,
At the risk of reinventing the wheel I thought I should contribute a workaround
I've come up with for getting my page breaks into the RTF output by a servlet
running FOP. Our usage runs FOP on the back end of a transform for which the
input is xml pulled out of Fedora Repository based upon the users choice.
Instead of passing the output of the fop factory to the servlet response
directly, I pass it to a byte array. Searching the byte array for occurrences
of a page break proxy string I can swap that string out for the string the RTF
relies upon to signal the page break. The altered byte array is then passed on
to the response.
Because we pass the output of the transform to FOP, we need only alter our
transform to output the desired page break proxy string in those spots where we
want a page break. A partial listing is as follows:
ByteArrayOutputStream RTFresByteArray = new ByteArrayOutputStream();
StreamResult RTFres = new StreamResult(RTFresByteArray);
Fop fop = fopFactory.newFop(MimeType, RTFresByteArray);
//after the first transform
FOPtransformer.transform(FOsrc, res);
//put the result in a byte array
byte[] RTFbyteArr = RTFresByteArray.toByteArray();
String findStr = "xKDARTFpagebreakencodingx"; //
byte[] findStrByte = findStr.getBytes( "8859_1" /*
encoding */ );
String breakStr = "\\pard \\insrsid \\page \\par";
//25 chars
byte[] breakStrByte = breakStr.getBytes( "8859_1" /*
encoding */ );
//now do the find and replace
for (int i = 0; i < (RTFbyteArr.length-26); ++i) {
if (RTFbyteArr[i] == findStrByte[0] &&
RTFbyteArr[i+1] == findStrByte[1] &&
RTFbyteArr[i+2] == findStrByte[2]){
if (RTFbyteArr[i+3] == findStrByte[3] &&
RTFbyteArr[i+4] == findStrByte[4] &&
RTFbyteArr[i+5] == findStrByte[5]){
for (int j = 0; j <25; j++){
RTFbyteArr[i + j] = breakStrByte[j];
}
}
}
}
//put the byte array in the outputstream
out.write(RTFbyteArr);
This works fine in the context of a servlet. If however I were running FOP in
a local environment I would alternately put a backend in batch to find and
replace the proxy string to get the page breaks.
Cheers,
Keith
