searching a keyword in a pdf using and extracting the corresponding area, using lucene

Question

Here is this code that tries to search a keyword in a pdf: `

          File pdfFile = new File(pdfString);
              IndexItem pdfIndexItem = index(pdfFile);
              Indexer indexer = new Indexer(INDEX_DIR);
              indexer.index(pdfIndexItem);

               indexer.close();

             Searcher searcher = new Searcher(INDEX_DIR);
             int result = searcher.findByContent("Fusion", DEFAULT_RESULT_SIZE);
             if(result==1)
          System.out.println("The document contains the search keyword");
          else
          System.out.println("The document does not contain the search keyword");
          searcher.close()`

this would work fine but it only says that either the document contains the keyword or not. what I wish is that if after finding the keyword(most likely multiple times), it extracts the area that the keywords is within it. by area, i mean the sentence that contains the keyword . does it require to store the text of pdf in a file and then doing a normal string tokenizing or this would be done without storing the textual version of pdf?