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## javax.mail.util
Class SharedByteArrayInputStream

    java.lang.Object
      java.io.InputStream
          java.io.ByteArrayInputStream
              javax.mail.util.SharedByteArrayInputStream

All Implemented Interfaces:
  java.io.Closeable, SharedInputStream

    public class SharedByteArrayInputStream

extends java.io.ByteArrayInputStream
implements SharedInputStream

A ByteArrayInputStream that implements the SharedInputStream interface, allowing the underlying byte array to be shared between multiple readers.

Since:
  JavaMail 1.4

Field Summary
`protected int` | `start` Position within shared buffer that this stream starts at.

Fields inherited from class java.io.ByteArrayInputStream
`buf, count, mark, pos`

Constructor Summary
`SharedByteArrayInputStream(byte[] buf)` Create a SharedByteArrayInputStream representing the entire byte array.
`SharedByteArrayInputStream(byte[] buf, int offset, int length)` Create a SharedByteArrayInputStream representing the part of the byte array from `offset` for `length` bytes.

Method Summary
`long` | `getPosition()` Return the current position in the InputStream, as an offset from the beginning of the InputStream.
`java.io.InputStream` | `newStream(long start, long end)` Return a new InputStream representing a subset of the data from this InputStream, starting at `start` (inclusive) up to `end` (exclusive).

Methods inherited from class java.io.ByteArrayInputStream
`available, close, mark, markSupported, read, read, reset, skip`

Methods inherited from class java.io.InputStream
`read`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### start

    protected int start

  Position within shared buffer that this stream starts at.

Constructor Detail

### SharedByteArrayInputStream

    public SharedByteArrayInputStream(byte[] buf)

  Create a SharedByteArrayInputStream representing the entire byte array.

  Parameters:
    `buf` - the byte array

### SharedByteArrayInputStream

    public SharedByteArrayInputStream(byte[] buf,
                                      int offset,
                                      int length)

  Create a SharedByteArrayInputStream representing the part of the byte array from `offset` for `length` bytes.

  Parameters:
    `buf` - the byte array
    `offset` - offset in byte array to first byte to include
    `length` - number of bytes to include

Method Detail

### getPosition

    public long getPosition()

  Return the current position in the InputStream, as an offset from the beginning of the InputStream.

  Specified by:
    `getPosition` in interface `SharedInputStream`
  Returns:
    the current position

### newStream

    public java.io.InputStream newStream(long start,
                                         long end)

  Return a new InputStream representing a subset of the data from this InputStream, starting at `start` (inclusive) up to `end` (exclusive). `start` must be non-negative. If `end` is -1, the new stream ends at the same place as this stream. The returned InputStream will also implement the SharedInputStream interface.

  Specified by:
    `newStream` in interface `SharedInputStream`
  Parameters:
    `start` - the starting position
    `end` - the ending position + 1
  Returns:
    the new stream

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