Examples of org.apache.lucene.index.IndexReader.deleteDocuments()

Class org.apache.lucene.index.IndexReader

Examples of org.apache.lucene.index.IndexReader.deleteDocuments()

org.apache.lucene.index.IndexReader.deleteDocuments()
Deletes all documents that have a given term indexed. This is useful if one uses a document field to hold a unique ID string for the document. Then to delete such a document, one merely constructs a term with the appropriate field and the unique ID string as its text and passes it to this method. See {@link #deleteDocument(int)} for information about when this deletion will become effective. @return the number of documents deleted @throws StaleReaderException if the index has changedsince this reader was opened @throws CorruptIndexException if the index is corrupt @throws LockObtainFailedException if another writerhas this index open (write.lock could not be obtained) @throws IOException if there is a low-level IO error

    IndexReader reader = null;
    try{
      reader = getReader(doc.name());  
      String pvalue = getField(doc, doc.getKeywordField());
      Term keyTerm = new Term(doc.getKeywordField(), pvalue);
      return reader.deleteDocuments(keyTerm);
    }catch(Exception e){
      log.error("Error where delete index of "+ doc, e);
    }finally{
      if(reader!=null)
      try{

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    if (oDir.exists()) {
      File[] aSegments = oDir.listFiles();
      if (null!=aSegments) {
      if (aSegments.length>0) {
          IndexReader oReader = IndexReader.open(sDirectory);
          int iDeleted = oReader.deleteDocuments(new Term("container", sFolder));
          oReader.close();
      } // fi 
      } // fi
    } else {
      FileSystem oFS = new FileSystem();

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    if (DebugFile.trace)
      DebugFile.writeln("new IndexWriter(...)");


  if (!bNewIndex) {
      IndexReader oIRdr = IndexReader.open(sDirectory);
      oIRdr.deleteDocuments(new Term("guid",sGuid));
      oIRdr.close();
  }


    IndexWriter oIWrt = new IndexWriter(sDirectory, (Analyzer) oAnalyzer.newInstance(), bNewIndex);

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    if (DebugFile.trace)
      DebugFile.writeln("IndexReader.open("+sDirectory+")");


    IndexReader oIRdr = IndexReader.open(sDirectory);
    oIRdr.deleteDocuments(new Term("guid", sGuid));
    oIRdr.close();


    IndexWriter oIWrt = new IndexWriter(sDirectory, (Analyzer) oAnalyzer
        .newInstance(), bNewIndex);

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    if (oDir.exists()) {
      File[] aFiles = oDir.listFiles();
      if (null!=aFiles) {
        if (aFiles.length>0) {
          IndexReader oReader = IndexReader.open(sDirectory);      
          int iDeleted = oReader.deleteDocuments(new Term("workarea", sWorkArea));
          oReader.close();
        }
      }
    } else {
      FileSystem oFS = new FileSystem();

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      try { oFS.mkdirs(sDirectory); } catch (Exception e) { throw new IOException(e.getClass().getName()+" "+e.getMessage()); }
    } // fi


    IndexReader oReader = IndexReader.open(sDirectory);


    int iDeleted = oReader.deleteDocuments(new Term("guid", sGuid));


    oReader.close();


    return iDeleted;
  } // delete

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  else
  { try  
     { synchronized(this)
       { FSDirectory fsd = FSDirectory.getDirectory(new File(Constants.getINDEXDIR()), false);
         IndexReader ir = IndexReader.open(fsd);
         ir.deleteDocuments(new Term("key", iDocument ) ); 
         ir.close(); 
       }
      }
      catch (IOException ie) { logger.error("Failed to delete " + iDocument + " " + ie.getMessage() ); }
     }

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   //*-- clean up the Lucene index
   FSDirectory fsd = FSDirectory.getDirectory(new File(Constants.getINDEXDIR()), false);
   IndexReader ir = IndexReader.open(fsd);
   for (int i = 0; i < delFiles.size(); i++)
    ir.deleteDocuments(new Term("key", (String) delFiles.get(i)) ); 
   ir.close();
  }
  catch (DatabaseException dbe) 
  { logger.error("Could not open cursor to browse File index" + dbe.getMessage() ); }
  catch (UnsupportedEncodingException ue)

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            // Delete all documents with "_hibernate_class" term of the selected entity
            DirectoryProvider dirProvider = ftSession.getSearchFactory().getDirectoryProviders(entityClass)[0];
            IndexReader reader = IndexReader.open(dirProvider.getDirectory());


            // TODO: This is using an internal term of HSearch
            reader.deleteDocuments(new Term("_hibernate_class", entityClass.getName()));
            reader.close();


            // Optimize index
            progress.setStatus("Optimizing index");
            log.debug("optimizing index (merging segments)");

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        // loop over all documents in updateQueue
        for (int i = 0; i < updateCopy.size(); i++) {
          String resourceUrl = updateCopy.get(i).get(OlatDocument.RESOURCEURL_FIELD_NAME);
          Term term = new Term(OlatDocument.RESOURCEURL_FIELD_NAME, resourceUrl );
          log.info("updateQueue:delete documents with resourceUrl=" + resourceUrl );
          indexReader.deleteDocuments(term);          
        }
        // loop over all documents in deleteQueue
        for (int i = 0; i < deleteCopy.size(); i++) {
          String resourceUrl = deleteCopy.get(i).get(OlatDocument.RESOURCEURL_FIELD_NAME);
          Term term = new Term(OlatDocument.RESOURCEURL_FIELD_NAME, resourceUrl );

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