/**
* Process a single row (this is repeated for all rows on input). On the first row, we do the
* following:
*
* <ul>
* <li>Setup a class loader that contains the Transformer jar file
* <li>Use this class loader to create a new instance of the transformer
* <li>The transformer will be reused for all subsequent rows
* <li>Open the zos file
* <li>Process the first row (classloader will find custom code if needed)
* <li>Restore the context class loader to avoid interference with PDI
* </ul>
*
* Here we also keep track of how many bytes from the file record were actually consumed by the
* transformers. This allows the leftover to be processed on the next call to this method.
*
* @param smi Step meta
* @param sdi Step data
* @throws KettleException if something goes wrong
*/
public boolean processRow(StepMetaInterface smi, StepDataInterface sdi) throws KettleException {
meta = (ZosFileInputMeta) smi;
data = (ZosFileInputData) sdi;
if (first) {
first = false;
data.outputRowMeta = new RowMeta();
meta.getFields(data.outputRowMeta, getStepname(), null, null, this);
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
try {
Cob2Pdi.setTransformerClassLoader(
getClass(), Cob2Pdi.getJarFileName(data.compositeJaxbClassName));
data.cobolBinding =
Cob2Pdi.newCobolBinding(Cob2Pdi.getJaxbClassName(data.compositeJaxbClassName));
data.fis = ZosFileInputStreamFactory.create(meta, new File(data.filename));
data.hostRecord = Cob2Pdi.newHostRecord(data.cobolBinding);
data.hostCharset = meta.getHostCharset();
data.status = new HostTransformStatus();
logBasic(BaseMessages.getString(PKG, "ZosFileInput.FileOpened.Message", data.filename));
return processRow();
} catch (FileNotFoundException e) {
throw new KettleException(e);
} finally {
Thread.currentThread().setContextClassLoader(tccl);
}
} else {
return processRow();
}
}
/**
* Step is initialized. Sanity checks the parameters.
*
* @param smi Step meta
* @param sdi Step data
* @return false if anything goes wrong
*/
public boolean init(StepMetaInterface smi, StepDataInterface sdi) {
meta = (ZosFileInputMeta) smi;
data = (ZosFileInputData) sdi;
data.filename = environmentSubstitute(meta.getFilename());
if (Const.isEmpty(data.filename)) {
logError(BaseMessages.getString(PKG, "ZosFileInput.MissingFilename.Message"));
return false;
}
logBasic(BaseMessages.getString(PKG, "ZosFileInput.ReadingFromFile.Message", data.filename));
data.compositeJaxbClassName = environmentSubstitute(meta.getCompositeJaxbClassName());
if (Const.isEmpty(data.compositeJaxbClassName)) {
logError(BaseMessages.getString(PKG, "ZosFileInput.MissingJaxbClassName.Message"));
return false;
}
logBasic(
BaseMessages.getString(
PKG, "ZosFileInput.UsingJAXBClass.Message", data.compositeJaxbClassName));
return super.init(smi, sdi);
}
