How to read .xlsb file

Hello @sg_sripathi, good question and yes this can be done.

Inject the expression utility class:

@Inject
private ExpressionUtils expressionUtils;

String pipeLabel;

then in the configure() method:

@Override
public void configure(PropertyValues propertyValues)
            throws ConfigurationException {
  Document emptyDoc = documentUtility.newDocument();
  pipeLabel = expressionUtils.createExpressionProperty(
  propertyValues, true, "pipe.label").eval(emptyDoc);
}

And then you can just use the variable when writing an output document e.g.:

Map<String, String> data = new LinkedHashMap<String, String>() {{
  put("pipeLabel", pipeLabel);
}};
outputViews.write(documentUtility.newDocument(data));

The Mapper Snap can be used to validate whatever expression value you are trying to use in the custom Snap: