Example: Reading and transforming spooled files

The following examples demonstrate how to set up a PrintParameterList to obtain different transformations when reading spooled file data. In the code segments that follow, assume a spooled file already exists on a server, and the createSpooledFile() method creates an instance of the SpooledFile class representing the spooled file.

Example of PrintObjectPageInputStream
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The following example shows how to create a PrintObjectPageInputStream object for reading pages of data formatted as GIF images. In this case, each page from the spooled file will be transformed into a GIF image. A GIF workstation customization object is used to specify the data transform. 
// Create a spooled file
SpooledFile splF = createSpooledFile();

// Set up print parameter list
PrintParameterList printParms = new PrintParameterList();
printParms.setParameter(PrintObject.ATTR_WORKSTATION_CUST_OBJECT, "/QSYS.LIB/QWPGIF.WSCST");
printParms.setParameter(PrintObject.ATTR_MFGTYPE, "*WSCST");

// Create a page input stream from the spooled file
PrintObjectPageInputStream is = splF.getPageInputStream(printParms);
Example of PrintObjectTransformedInputStream
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The following example shows how to create a PrintObjectTransformedInputStream object for reading data formatted as TIFF. A TIFF (G4 compression) workstation customization object is used to specify the data transform. 
// Create a spooled file
SpooledFile splF = createSpooledFile();

// Set up print parameter list
PrintParameterList printParms = new PrintParameterList();
printParms.setParameter(PrintObject.ATTR_WORKSTATION_CUST_OBJECT, "/QSYS.LIB/QWPTIFFG4.WSCST");
printParms.setParameter(PrintObject.ATTR_MFGTYPE, "*WSCST");

// Create a transformed input stream from the spooled file
PrintObjectTransformedInputStream is = splF.getTransformedInputStream(printParms);
Example of PrintObjectTransformedInputStream using manufacturer type and model
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The following example shows how to create a PrintObjectTransformedInputStream object for reading data formatted for output to an ASCII printer. A manufacturer type and model of *HP4 is used to specify the data transform. 
// Create a spooled file
SpooledFile splF = createSpooledFile();

// Set up print parameter list
PrintParameterList printParms = new PrintParameterList();
printParms.setParameter(PrintObject.ATTR_MFGTYPE, "*HP4");

// Create a transformed input stream from the spooled file
PrintObjectTransformedInputStream is = splF.getTransformedInputStream(printParms);