Package org.apache.tools.ant.taskdefs

# Class StreamPumper

java.lang.Object
org.apache.tools.ant.taskdefs.StreamPumper

All Implemented Interfaces:
  `Runnable`

public class StreamPumper extends Object implements Runnable
Copies all data from an input stream to an output stream.

Since:
  Ant 1.2

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `StreamPumper​(InputStream is, OutputStream os)`
  Create a new StreamPumper.
  `StreamPumper​(InputStream is, OutputStream os, boolean closeWhenExhausted)`
  Create a new StreamPumper.
  `StreamPumper​(InputStream is, OutputStream os, boolean closeWhenExhausted, boolean useAvailable)`
  Create a new StreamPumper.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `int`
  `getBufferSize()`
  Get the size in bytes of the read buffer.
  `Exception`
  `getException()`
  Get the exception encountered, if any.
  `boolean`
  `isFinished()`
  Tells whether the end of the stream has been reached.
  `void`
  `run()`
  Copies data from the input stream to the output stream.
  `void`
  `setBufferSize​(int bufferSize)`
  Set the size in bytes of the read buffer.
  `void`
  `waitFor()`
  This method blocks until the StreamPumper finishes.

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

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

- ## Constructor Details

  - ### StreamPumper

    public StreamPumper​(InputStream is, OutputStream os, boolean closeWhenExhausted)
    Create a new StreamPumper.
    Parameters:
      `is` - input stream to read data from
      `os` - output stream to write data to.
      `closeWhenExhausted` - if true, the output stream will be closed when the input is exhausted.

  - ### StreamPumper

    public StreamPumper​(InputStream is, OutputStream os, boolean closeWhenExhausted, boolean useAvailable)
    Create a new StreamPumper.

    Note: If you set useAvailable to true, you must explicitly invoke `stop` or interrupt the corresponding Thread when you are done or the run method will never finish on some JVMs (namely those where available returns 0 on a closed stream). Setting it to true may also impact performance negatively. This flag should only be set to true if you intend to stop the pumper before the input stream gets closed.

    Parameters:
      `is` - input stream to read data from
      `os` - output stream to write data to.
      `closeWhenExhausted` - if true, the output stream will be closed when the input is exhausted.
      `useAvailable` - whether the pumper should use `available` to determine whether input is ready, thus trying to emulate non-blocking behavior.
    Since:
      Ant 1.8.0

  - ### StreamPumper

    public StreamPumper​(InputStream is, OutputStream os)
    Create a new StreamPumper.
    Parameters:
      `is` - input stream to read data from
      `os` - output stream to write data to.

- ## Method Details

  - ### run

    public void run()
    Copies data from the input stream to the output stream. Terminates as soon as the input stream is closed or an error occurs.
    Specified by:
      `run` in interface `Runnable`

  - ### isFinished

    public boolean isFinished()
    Tells whether the end of the stream has been reached.
    Returns:
      true is the stream has been exhausted.

  - ### waitFor

    public void waitFor() throws InterruptedException
    This method blocks until the StreamPumper finishes.
    Throws:
      `InterruptedException` - if interrupted.
    See Also:
      `isFinished()`

  - ### setBufferSize

    public void setBufferSize​(int bufferSize)
    Set the size in bytes of the read buffer.
    Parameters:
      `bufferSize` - the buffer size to use.
    Throws:
      `IllegalStateException` - if the StreamPumper is already running.

  - ### getBufferSize

    public int getBufferSize()
    Get the size in bytes of the read buffer.
    Returns:
      the int size of the read buffer.

  - ### getException

    public Exception getException()
    Get the exception encountered, if any.
    Returns:
      the Exception encountered.