org.apache.hc.core5.http.nio.support.classic

## Class SharedInputBuffer

- java.lang.Object
- - org.apache.hc.core5.http.impl.nio.ExpandableBuffer
  - - org.apache.hc.core5.http.nio.support.classic.SharedInputBuffer

- All Implemented Interfaces:
    ContentInputBuffer

      @Contract(threading=SAFE)
      public final class SharedInputBuffer
      extends ExpandableBuffer
      implements ContentInputBuffer

  Since:
    5.0

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.hc.core5.http.impl.nio.ExpandableBuffer

      `ExpandableBuffer.Mode`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SharedInputBuffer(int bufferSize)`
    `SharedInputBuffer(ReentrantLock lock, int initialBufferSize)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `abort()`
    `int` | `capacity()` Returns available capacity of this buffer.
    `int` | `fill(ByteBuffer src)`
    `boolean` | `hasData()` Determines if the buffer contains data.
    `boolean` | `isEndStream()`
    `int` | `length()` Returns the length of this buffer.
    `void` | `markEndStream()`
    `int` | `read()` Reads one byte from this buffer.
    `int` | `read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this buffer into an array of bytes.
    `void` | `reset()`
    `void` | `updateCapacity(CapacityChannel capacityChannel)`

    - ### Methods inherited from class org.apache.hc.core5.http.impl.nio.ExpandableBuffer

      `buffer, clear, ensureAdjustedCapacity, ensureCapacity, expand, mode, setInputMode, setOutputMode, toString`

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

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

    - ### Methods inherited from interface org.apache.hc.core5.http.nio.support.classic.ContentInputBuffer

      `length, reset`

- - ### Constructor Detail

    - #### SharedInputBuffer

          public SharedInputBuffer(ReentrantLock lock,
                           int initialBufferSize)

    - #### SharedInputBuffer

          public SharedInputBuffer(int bufferSize)

  - ### Method Detail

    - #### fill

          public int fill(ByteBuffer src)

    - #### updateCapacity

          public void updateCapacity(CapacityChannel capacityChannel)
                              throws IOException

      Throws:
        `IOException`

    - #### read

          public int read()
                   throws IOException

      Description copied from interface: `ContentInputBuffer`
      Reads one byte from this buffer. If the buffer is empty this method can throw a runtime exception. The exact type of runtime exception thrown by this method depends on implementation. This method returns `-1` if the end of content stream has been reached.
      Specified by:
        `read` in interface `ContentInputBuffer`
      Returns:
        one byte
      Throws:
        `IOException`

    - #### read

          public int read(byte[] b,
                 int off,
                 int len)
                   throws IOException

      Description copied from interface: `ContentInputBuffer`
      Reads up to `len` bytes of data from this buffer into an array of bytes. The exact number of bytes read depends how many bytes are stored in the buffer.

      If `off` is negative, or `len` is negative, or `off+len` is greater than the length of the array `b`, this method can throw a runtime exception. The exact type of runtime exception thrown by this method depends on implementation. This method returns `-1` if the end of content stream has been reached.

      Specified by:
        `read` in interface `ContentInputBuffer`
      Parameters:
        `b` - the buffer into which the data is read.
        `off` - the start offset in array `b` at which the data is written.
        `len` - the maximum number of bytes to read.
      Returns:
        the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached.
      Throws:
        `IOException` - if an I/O error occurs.

    - #### markEndStream

          public void markEndStream()

    - #### hasData

          public boolean hasData()

      Description copied from class: `ExpandableBuffer`
      Determines if the buffer contains data.

      Sets the mode to output.

      Overrides:
        `hasData` in class `ExpandableBuffer`
      Returns:
        `true` if there is data in the buffer, `false` otherwise.

    - #### capacity

          public int capacity()

      Description copied from class: `ExpandableBuffer`
      Returns available capacity of this buffer.
      Overrides:
        `capacity` in class `ExpandableBuffer`
      Returns:
        buffer length.

    - #### length

          public int length()

      Description copied from class: `ExpandableBuffer`
      Returns the length of this buffer.

      Sets the mode to output.

      Overrides:
        `length` in class `ExpandableBuffer`
      Returns:
        buffer length.

    - #### abort

          public void abort()

    - #### reset

          public void reset()

    - #### isEndStream

          public boolean isEndStream()

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