Examples of org.apache.lucene.store.IndexInput

org.apache.lucene.store.IndexInput
Abstract base class for input from a file in a {@link Directory}. A random-access input stream. Used for all Lucene index input operations. @see Directory

    }
    return s;
  }


  public void copyFile(Directory dir, String src, String dest) throws IOException {
    IndexInput in = dir.openInput(src);
    IndexOutput out = dir.createOutput(dest);
    byte[] b = new byte[1024];
    long remainder = in.length();
    while(remainder > 0) {
      int len = (int) Math.min(b.length, remainder);
      in.readBytes(b, 0, len);
      out.writeBytes(b, len);
      remainder -= len;
    }
    in.close();
    out.close();
  }

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      return result;
    }


    final int numSegments = sis.size();
    final String segmentsFileName = sis.getCurrentSegmentFileName();
    IndexInput input = null;
    try {
      input = dir.openInput(segmentsFileName);
    } catch (Throwable t) {
      msg("ERROR: could not open segments file in directory");
      if (infoStream != null)
        t.printStackTrace(infoStream);
      result.cantOpenSegments = true;
      return result;
    }
    int format = 0;
    try {
      format = input.readInt();
    } catch (Throwable t) {
      msg("ERROR: could not read segment file version in directory");
      if (infoStream != null)
        t.printStackTrace(infoStream);
      result.missingSegmentVersion = true;
      return result;
    } finally {
      if (input != null)
        input.close();
    }


    String sFormat = "";
    boolean skip = false;

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   * @param d The directory to open the IndexInput from
   * @param name The name of the file to open the IndexInput from in the Directory
   * @throws IOException
   */
  FieldInfos(Directory d, String name) throws IOException {
    IndexInput input = d.openInput(name);
    try {
      try {
        read(input, name);
      } catch (IOException ioe) {
        if (format == FORMAT_PRE) {
          // LUCENE-1623: FORMAT_PRE (before there was a
          // format) may be 2.3.2 (pre-utf8) or 2.4.x (utf8)
          // encoding; retry with input set to pre-utf8
          input.seek(0);
          input.setModifiedUTF8StringsMode();
          byNumber.clear();
          byName.clear();
          try {
            read(input, name);
          } catch (Throwable t) {
            // Ignore any new exception & throw original IOE
            throw ioe;
          }
        } else {
          // The IOException cannot be caused by
          // LUCENE-1623, so re-throw it
          throw ioe;
        }
      }
    } finally {
      input.close();
    }
  }

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      lazy = true;
      this.isCompressed = isCompressed;
    }


    private IndexInput getFieldStream() {
      IndexInput localFieldsStream = fieldsStreamTL.get();
      if (localFieldsStream == null) {
        localFieldsStream = (IndexInput) cloneableFieldsStream.clone();
        fieldsStreamTL.set(localFieldsStream);
      }
      return localFieldsStream;

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      ensureOpen();
      if (isBinary)
        return null;
      else {
        if (fieldsData == null) {
          IndexInput localFieldsStream = getFieldStream();
          try {
            localFieldsStream.seek(pointer);
            if (isCompressed) {
              final byte[] b = new byte[toRead];
              localFieldsStream.readBytes(b, 0, b.length);
              fieldsData = new String(uncompress(b), "UTF-8");
            } else {
              if (format >= FieldsWriter.FORMAT_VERSION_UTF8_LENGTH_IN_BYTES) {
                byte[] bytes = new byte[toRead];
                localFieldsStream.readBytes(bytes, 0, toRead);
                fieldsData = new String(bytes, "UTF-8");
              } else {
                //read in chars b/c we already know the length we need to read
                char[] chars = new char[toRead];
                localFieldsStream.readChars(chars, 0, toRead);
                fieldsData = new String(chars);
              }
            }
          } catch (IOException e) {
            throw new FieldReaderException(e);

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          if (result == null || result.length < toRead)
            b = new byte[toRead];
          else
            b = result;
   
          IndexInput localFieldsStream = getFieldStream();


          // Throw this IOException since IndexReader.document does so anyway, so probably not that big of a change for people
          // since they are already handling this exception when getting the document
          try {
            localFieldsStream.seek(pointer);
            localFieldsStream.readBytes(b, 0, toRead);
            if (isCompressed == true) {
              fieldsData = uncompress(b);
            } else {
              fieldsData = b;
            }

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            start = new Date();


            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexInput file = store.openInput(name);


                if (file.length() != length)
                    throw new Exception("length incorrect");


                for (int j = 0; j < length; j++) {
                    byte b = (byte) (gen.nextInt() & 0x7F);


                    if (file.readByte() != b)
                        throw new Exception("contents incorrect");
                }


                file.close();
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;

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            for (int i = 0; i < count; i++) {
                int length = gen.nextInt() & LENGTH_MASK;


                if (i % 2 != 0) {
                    String name = i + ".dat";
                    IndexInput file = store.openInput(name);
                    if (file.length() != length)
                        throw new Exception("length incorrect");


                    for (int j = 0; j < length; j++) {
                        byte b = (byte) (gen.nextInt() & 0x7F);


                        if (file.readByte() != b)
                            throw new Exception("contents incorrect");
                    }


                    file.close();
                } else {
                    for (int j = 0; j < length; j++) {
                        gen.nextInt();
                    }
                }

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            start = new Date();


            for (int i = 0; i < count; i++) {
                String name = i + ".dat";
                int length = gen.nextInt() & LENGTH_MASK;
                IndexInput file = store.openInput(name);


                if (file.length() != length)
                    throw new Exception("length incorrect");


                byte[] data = new byte[length];
                byte[] read = new byte[length];
                gen.nextBytes(data);
                file.readBytes(read, 0, length);


                if (!Arrays.equals(data, read))
                    throw new Exception("contents incorrect");


                file.close();
            }
        } catch (IOException e) {
            txn.abort();
            txn = null;
            throw e;

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  /** Constructs a bit vector from the file <code>name</code> in Directory
    <code>d</code>, as written by the {@link #write} method.
    */
  public BitVector(Directory d, String name) throws IOException {
    IndexInput input = d.openInput(name);
    try {
      size = input.readInt();       // read size
      if (size == -1) {
        readDgaps(input);
      } else {
        readBits(input);
      }
    } finally {
      input.close();
    }
  }

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