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} finally { s.close(); } private void buildIndex(String filename, FullTextSession session, Transaction tx) { Document doc = getDocument(filename); Pdf pdf = getPdf(doc); session.save(pdf); tx.commit(); session.clear(); } private Document getDocument(String filename) { Create a Document doc; LucenePDFDocument InputStream istream; instance File file = new File( filename ); LucenePDFDocument pdf = new LucenePDFDocument(); try { istream = new FileInputStream( file ); Get the PDF via an doc = pdf.convertDocument( istream ); InputStream } catch (Exception e) { Create the Lucene throw new PDFExtractorException( document "unable to create document" , e ); } return doc; }

s In general, try to exploit SQL, rather than code Visual Basic .NET procedures, to get the data you need Tip from the database. Database servers are optimized to perform selections and sorts, as well as other things. Queries can be far more sophisticated and powerful than the ones you ve been playing with in this book. By carefully (and creatively) coding queries to return exactly what you need, you not only minimize resource demands (on memory, network bandwidth, and so on), but also reduce the code you must write to manipulate and format result set data.

private Pdf getPdf(Document doc) { Pdf pdf = new Pdf(); pdf.setAuthor( doc.get("Author") ); pdf.setKeywords( doc.get("Keywords") ); pdf.setSubject( doc.get("Subject") ); pdf.setTitle( doc.get("Title") ); pdf.setSummary( doc.get("summary") ); pdf.setContents( getContents(doc.getField("contents")) ); pdf.setDescription( pdf.getContents() ); return pdf; } private String getContents(Field field) { StringReader reader =

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' Create input parameter Dim inparm As SqlParameter = cmd.Parameters.Add( _ "@employeeid", _ SqlDbType.Int _ ) inparm.Direction = ParameterDirection.Input inparm.Value = 2 ' Create output parameter Dim ouparm As SqlParameter = cmd.Parameters.Add( _ "@ordercount", _ SqlDbType.Int _ ) ouparm.Direction = ParameterDirection.Output ' Create return value parameter Dim retval As SqlParameter = cmd.Parameters.Add( _ "return_value", _ SqlDbType.Int _ ) retval.Direction = ParameterDirection.ReturnValue

(StringReader) field.readerValue(); BufferedReader br = new BufferedReader(reader); String in; StringBuilder sb = new StringBuilder(); Get the try { Contents field while ((in = br.readLine()) != null) { sb.append(in); } } catch (IOException e) { System.out.println("unable to retrieve contents field"); } finally { try { br.close(); } catch (IOException e) { // Live with it. } } return sb.toString();

You set the input parameter value to 2 before the call:

The loop through the second data table is interesting mainly for its first line, which uses an ordinal index: For Each row In dtc(1).Rows Since you don t rename the second data table (you could do so with its TableName property), it is better to use the index rather than the name (customers1), since a change to the name in the Fill() call would require you to change it here, an unlikely thing to remember to do, if the case ever arises.

Create a LucenePDFDocument instance B, then grab the PDF document by opening an InputStream on it C. Once you have the stream, creating the Lucene document is one step away D. Listing 13.11 shows the output of the code from listing 13.10. If you compare listing 13.9 with listing 13.10, you ll see that less coding was necessary to produce essentially identical results. One more thing to cover before we move on to the next topic is the statement we made concerning the Contents field in table 13.1. This field is not stored in the usually easily accessible Hit.get(fieldname) format we re used to. It s stored as a Java StringBuffer object. Examining listing 13.10 at E, you can see that the Contents field is still accessible albeit not quite as easily as with the get(fieldname) method.

and retrieved the values for the output parameter and return value by indexing into the command s parameters collection after the stored procedure returned:

contents - Keanu Reeves is completely wooden in this romantic misfire by Alfonso Arau (Like Water for Chocolate). Reeves plays a World War II vet who hits the road as a traveling salesman and agrees to help a desperate, pregnant woman (Aitana Sanchez-Gijon) Author - John Griffin & Emmanuel Bernard CreationDate - 20080120110533 Keywords - LucenePDFDocument; Keanu Reeves; Alfonso Arau ModificationDate - 20080120113135 Producer - Acrobat Web Capture 8.0

summary - Keanu Reeves is completely wooden in this romantic misfire by Alfonso Arau (Like Water for Chocolate). Reeves plays a World War II vet who hits the road as a traveling salesman and agrees to help a desperate, pregnant woman (Aitana Sanchez Gijon)

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