org.apache.lucene.codecs.uniformsplit

## Class BlockLine

- java.lang.Object
- - org.apache.lucene.codecs.uniformsplit.BlockLine

- All Implemented Interfaces:
    Accountable
  Direct Known Subclasses:
    STBlockLine

      public class BlockLine
      extends Object
      implements Accountable

  One term block line.

  Contains a term and its details as a `BlockTermState`.

  The line is written to the `block file` in two parts. The first part is the term followed by an offset to the details region. The second part is the term `BlockTermState`, written in the details region, after all the terms of the block.

  The separate details region allows fast scan of the terms without having to decode the details for each term. At read time, the `BlockLine.Serializer.readLine(org.apache.lucene.store.DataInput, boolean, org.apache.lucene.codecs.uniformsplit.BlockLine)` only reads the term and its offset to the details. The corresponding `BlockTermState` is decoded on demand in the `BlockReader` (see `BlockReader.readTermStateIfNotRead()`).

  WARNING: This API is experimental and might change in incompatible ways in the next release.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `BlockLine.Serializer` Reads block lines with terms encoded incrementally inside a block.

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected TermBytes` | `termBytes`
    `protected BlockTermState` | `termState` Only used for writing.
    `protected int` | `termStateRelativeOffset`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `BlockLine(TermBytes termBytes, BlockTermState termState)` Constructor used for writing a `BlockLine`.
    `protected` | `BlockLine(TermBytes termBytes, int termStateRelativeOffset)` Constructor used for reading a `BlockLine`.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `TermBytes` | `getTermBytes()`
    `int` | `getTermStateRelativeOffset()`
    `long` | `ramBytesUsed()`
    `protected BlockLine` | `reset(TermBytes termBytes, int termStateRelativeOffset)` Resets this `BlockLine` to reuse it when reading.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.apache.lucene.util.Accountable

      `getChildResources`

- - ### Field Detail

    - #### termBytes

          protected TermBytes termBytes

    - #### termStateRelativeOffset

          protected int termStateRelativeOffset

    - #### termState

          protected final BlockTermState termState

      Only used for writing.

  - ### Constructor Detail

    - #### BlockLine

          protected BlockLine(TermBytes termBytes,
                              BlockTermState termState)

      Constructor used for writing a `BlockLine`.

    - #### BlockLine

          protected BlockLine(TermBytes termBytes,
                              int termStateRelativeOffset)

      Constructor used for reading a `BlockLine`.

  - ### Method Detail

    - #### reset

          protected BlockLine reset(TermBytes termBytes,
                                    int termStateRelativeOffset)

      Resets this `BlockLine` to reuse it when reading.

    - #### getTermBytes

          public TermBytes getTermBytes()

    - #### getTermStateRelativeOffset

          public int getTermStateRelativeOffset()

      Returns:
        The offset of the `TermState` bytes in the block, relatively to the term states base offset.

    - #### ramBytesUsed

          public long ramBytesUsed()

      Specified by:
        `ramBytesUsed` in interface `Accountable`

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