org.apache.lucene.util

## Class PagedBytes.Reader

- java.lang.Object
- - org.apache.lucene.util.PagedBytes.Reader

- All Implemented Interfaces:
    Accountable
  Enclosing class:
    PagedBytes

      public static final class PagedBytes.Reader
      extends Object
      implements Accountable

  Provides methods to read BytesRefs from a frozen PagedBytes.
  See Also:
    `PagedBytes.freeze(boolean)`

- - ### Field Summary

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

      `NULL_ACCOUNTABLE`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `fill(BytesRef b, long start)` Reads length as 1 or 2 byte vInt prefix, starting at start.
    `void` | `fillSlice(BytesRef b, long start, int length)` Gets a slice out of `PagedBytes` starting at start with a given length.
    `byte` | `getByte(long o)` Get the byte at the given offset.
    `long` | `ramBytesUsed()` Return the memory usage of this object in bytes.
    `String` | `toString()`

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

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

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

      `getChildResources`

- - ### Method Detail

    - #### fillSlice

          public void fillSlice(BytesRef b,
                                long start,
                                int length)

      Gets a slice out of `PagedBytes` starting at start with a given length. Iff the slice spans across a block border this method will allocate sufficient resources and copy the paged data.

      Slices spanning more than two blocks are not supported.

      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

    - #### getByte

          public byte getByte(long o)

      Get the byte at the given offset.
      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

    - #### fill

          public void fill(BytesRef b,
                           long start)

      Reads length as 1 or 2 byte vInt prefix, starting at start.

      Note: this method does not support slices spanning across block borders.

      NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

    - #### ramBytesUsed

          public long ramBytesUsed()

      Description copied from interface: `Accountable`
      Return the memory usage of this object in bytes. Negative values are illegal.
      Specified by:
        `ramBytesUsed` in interface `Accountable`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

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