Examples of org.apache.lucene.store.IndexInput.seek()

Class org.apache.lucene.store.IndexInput

Examples of org.apache.lucene.store.IndexInput.seek()

org.apache.lucene.store.IndexInput.seek()
Sets current position in this file, where the next read will occur. @see #getFilePointer()

      final byte[] buffer;
      final IndexInput input = directory.openInput(fileName, IOContext.READ);
      final long length = input.length();
      try {
         if (seekTo != 0) {
            input.seek(seekTo);
         }
         bufferSize = (int) Math.min(length - seekTo, (long)bufferSize);
         buffer = new byte[bufferSize];
         input.readBytes(buffer, 0, bufferSize);
      }

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        final byte[] b = new byte[toRead];
        IndexInput localFieldsStream = getFieldStream();
        //Throw this IO Exception 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, b.length);
          if (isCompressed == true) {
            fieldsData = uncompress(b);
          } else {
            fieldsData = b;

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    public String stringValue() {
      ensureOpen();
      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 {

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    testEof(name, directory, hdfsLength);
  }


  private void testEof(String name, Directory directory, long length) throws IOException {
    IndexInput input = directory.openInput(name, IOContext.DEFAULT);
    input.seek(length);
    try {
      input.readByte();
      fail("should throw eof");
    } catch (IOException e) {
    }

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      int offset = random.nextInt(fsBuf.length);
      int length = random.nextInt(fsBuf.length - offset);
      int pos = random.nextInt(fileLength - length);
      fsInput.seek(pos);
      fsInput.readBytes(fsBuf, offset, length);
      hdfsInput.seek(pos);
      hdfsInput.readBytes(hdfsBuf, offset, length);
      for (int f = offset; f < length; f++) {
        if (fsBuf[f] != hdfsBuf[f]) {
          fail();
        }

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    testEof(name, directory, hdfsLength);
  }


  private void testEof(String name, Directory directory, long length) throws IOException {
    IndexInput input = directory.openInput(name, IOContext.DEFAULT);
    input.seek(length);
    try {
      input.readByte();
      fail("should throw eof");
    } catch (IOException e) {
    }

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        int offset = random.nextInt(fsBuf.length);
        int length = random.nextInt(fsBuf.length - offset);
        int pos = random.nextInt(fileLength - length);
        fsInput.seek(pos);
        fsInput.readBytes(fsBuf, offset, length);
        hdfsInput.seek(pos);
        hdfsInput.readBytes(hdfsBuf, offset, length);
        for (int f = offset; f < length; f++) {
          if (fsBuf[f] != hdfsBuf[f]) {
            fail(Long.toString(seed) + " read [" + i + "]");
          }

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      rootBlockFP = (new ByteArrayDataInput(rootCode.bytes, rootCode.offset, rootCode.length)).readVLong() >>> BlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS;


      if (indexIn != null) {
        final IndexInput clone = indexIn.clone();
        //System.out.println("start=" + indexStartFP + " field=" + fieldInfo.name);
        clone.seek(indexStartFP);
        index = new FST<BytesRef>(clone, ByteSequenceOutputs.getSingleton());
        
        /*
        if (false) {
          final String dotFileName = segment + "_" + fieldInfo.name + ".dot";

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    }


    private void loadTermsIndex() throws IOException {
      if (fst == null) {
        IndexInput clone = in.clone();
        clone.seek(indexStart);
        fst = new FST<Long>(clone, fstOutputs);
        clone.close();


        /*
        final String dotFileName = segment + "_" + fieldInfo.name + ".dot";

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        this.termsStart = termsStart;
        termBytesStart = termBytes.getPointer();


        IndexInput clone = in.clone();
        clone.seek(indexStart);


        // -1 is passed to mean "don't load term index", but
        // if we are then later loaded it's overwritten with
        // a real value
        assert indexDivisor > 0;

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