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## org.apache.tools.ant.taskdefs
Class Redirector

    java.lang.Object
      |
      +--org.apache.tools.ant.taskdefs.Redirector

public class Redirector
extends java.lang.Object

The Redirector class manages the setup and connection of input and output redirection for an Ant task.

Since:
  Ant 1.6

Constructor Summary
`Redirector(Task managingTask)` Create a redirector instance for the given task

Method Summary
`void` | `complete()` Complete redirection.
`ExecuteStreamHandler` | `createHandler()` Create the StreamHandler to use with our Execute instance.
`void` | `createStreams()` Create the input, error and output streams based on the configuration options.
`java.io.OutputStream` | `getErrorStream()` Get the error stream for the redirector
`java.io.InputStream` | `getInputStream()` Get the input stream for the redirector
`java.io.OutputStream` | `getOutputStream()` Get the output stream for the redirector
`protected void` | `handleErrorFlush(java.lang.String output)` Handle a flush operation on the error stream
`protected void` | `handleErrorOutput(java.lang.String output)` Process error output
`protected void` | `handleFlush(java.lang.String output)` Process data due to a flush operation.
`protected int` | `handleInput(byte[] buffer, int offset, int length)` Handle an input request
`protected void` | `handleOutput(java.lang.String output)` Pass output sent to System.out to specified output.
`void` | `setAppend(boolean append)` Whether output should be appended to or overwrite an existing file.
`void` | `setAppendProperties(boolean appendProperties)` This `Redirector`'s subordinate `PropertyOutputStream`s will not set their respective properties `while (appendProperties && append)`.
`void` | `setCreateEmptyFiles(boolean createEmptyFiles)` Whether output and error files should be created even when empty.
`void` | `setError(java.io.File error)` Set the file to which standard error is to be redirected.
`void` | `setError(java.io.File[] error)` Set the files to which standard error is to be redirected.
`void` | `setErrorEncoding(java.lang.String errorEncoding)` Set the error encoding.
`void` | `setErrorFilterChains(java.util.Vector errorFilterChains)` Set the error `FilterChain`s.
`void` | `setErrorProperty(java.lang.String errorProperty)` Property name whose value should be set to the error of the process.
`void` | `setInput(java.io.File input)` Set the input to use for the task
`void` | `setInput(java.io.File[] input)` Set the input to use for the task
`void` | `setInputEncoding(java.lang.String inputEncoding)` Set the input encoding.
`void` | `setInputFilterChains(java.util.Vector inputFilterChains)` Set the input `FilterChain`s.
`void` | `setInputString(java.lang.String inputString)` Set the string to use as input
`void` | `setLogError(boolean logError)` Controls whether error output of exec is logged.
`void` | `setOutput(java.io.File out)` File the output of the process is redirected to.
`void` | `setOutput(java.io.File[] out)` Files the output of the process is redirected to.
`void` | `setOutputEncoding(java.lang.String outputEncoding)` Set the output encoding.
`void` | `setOutputFilterChains(java.util.Vector outputFilterChains)` Set the output `FilterChain`s.
`void` | `setOutputProperty(java.lang.String outputProperty)` Property name whose value should be set to the output of the process.
`void` | `setProperties()` Notify the `Redirector` that it is now okay to set any output and/or error properties.

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

Constructor Detail

### Redirector

    public Redirector(Task managingTask)

  Create a redirector instance for the given task

Parameters:
  `managingTask` - the task for which the redirector is to work

Method Detail

### setInput

    public void setInput(java.io.File input)

  Set the input to use for the task

  Parameters:
    `input` - the file from which input is read.

### setInput

    public void setInput(java.io.File[] input)

  Set the input to use for the task

  Parameters:
    `input` - the files from which input is read.

### setInputString

    public void setInputString(java.lang.String inputString)

  Set the string to use as input

  Parameters:
    `inputString` - the string which is used as the input source

### setOutput

    public void setOutput(java.io.File out)

  File the output of the process is redirected to. If error is not redirected, it too will appear in the output

  Parameters:
    `out` - the file to which output stream is written

### setOutput

    public void setOutput(java.io.File[] out)

  Files the output of the process is redirected to. If error is not redirected, it too will appear in the output

  Parameters:
    `out` - the files to which output stream is written

### setOutputEncoding

    public void setOutputEncoding(java.lang.String outputEncoding)

  Set the output encoding.

  Parameters:
    `outputEncoding` - `String`.

### setErrorEncoding

    public void setErrorEncoding(java.lang.String errorEncoding)

  Set the error encoding.

  Parameters:
    `errorEncoding` - `String`.

### setInputEncoding

    public void setInputEncoding(java.lang.String inputEncoding)

  Set the input encoding.

  Parameters:
    `inputEncoding` - `String`.

### setLogError

    public void setLogError(boolean logError)

  Controls whether error output of exec is logged. This is only useful when output is being redirected and error output is desired in the Ant log

  Parameters:
    `logError` - if true the standard error is sent to the Ant log system and not sent to output.

### setAppendProperties

    public void setAppendProperties(boolean appendProperties)

  This `Redirector`'s subordinate `PropertyOutputStream`s will not set their respective properties `while (appendProperties && append)`.

  Parameters:
    `appendProperties` - whether to append properties.

### setError

    public void setError(java.io.File error)

  Set the file to which standard error is to be redirected.

  Parameters:
    `error` - the file to which error is to be written

### setError

    public void setError(java.io.File[] error)

  Set the files to which standard error is to be redirected.

  Parameters:
    `error` - the file to which error is to be written

### setOutputProperty

    public void setOutputProperty(java.lang.String outputProperty)

  Property name whose value should be set to the output of the process.

  Parameters:
    `outputProperty` - the name of the property to be set with the task's output.

### setAppend

    public void setAppend(boolean append)

  Whether output should be appended to or overwrite an existing file. Defaults to false.

  Parameters:
    `append` - if true output and error streams are appended to their respective files, if specified.

### setCreateEmptyFiles

    public void setCreateEmptyFiles(boolean createEmptyFiles)

  Whether output and error files should be created even when empty. Defaults to true.

  Parameters:
    `createEmptyFiles` - `boolean`.

### setErrorProperty

    public void setErrorProperty(java.lang.String errorProperty)

  Property name whose value should be set to the error of the process.

  Parameters:
    `errorProperty` - the name of the property to be set with the error output.

### setInputFilterChains

    public void setInputFilterChains(java.util.Vector inputFilterChains)

  Set the input `FilterChain`s.

  Parameters:
    `inputFilterChains` - `Vector` containing `FilterChain`.

### setOutputFilterChains

    public void setOutputFilterChains(java.util.Vector outputFilterChains)

  Set the output `FilterChain`s.

  Parameters:
    `outputFilterChains` - `Vector` containing `FilterChain`.

### setErrorFilterChains

    public void setErrorFilterChains(java.util.Vector errorFilterChains)

  Set the error `FilterChain`s.

  Parameters:
    `errorFilterChains` - `Vector` containing `FilterChain`.

### createStreams

    public void createStreams()

  Create the input, error and output streams based on the configuration options.

### createHandler

    public ExecuteStreamHandler createHandler()
                                       throws BuildException

  Create the StreamHandler to use with our Execute instance.

  Returns:
    the execute stream handler to manage the input, output and error streams.
  Throws:
    `BuildException` - if the execute stream handler cannot be created.

### handleOutput

    protected void handleOutput(java.lang.String output)

  Pass output sent to System.out to specified output.

  Parameters:
    `output` - the data to be output

### handleInput

    protected int handleInput(byte[] buffer,
                              int offset,
                              int length)
                       throws java.io.IOException

  Handle an input request

  Parameters:
    `buffer` - the buffer into which data is to be read.
    `offset` - the offset into the buffer at which data is stored.
    `length` - the amount of data to read
  Returns:
    the number of bytes read
  Throws:
    `java.io.IOException` - if the data cannot be read

### handleFlush

    protected void handleFlush(java.lang.String output)

  Process data due to a flush operation.

  Parameters:
    `output` - the data being flushed.

### handleErrorOutput

    protected void handleErrorOutput(java.lang.String output)

  Process error output

  Parameters:
    `output` - the error output data.

### handleErrorFlush

    protected void handleErrorFlush(java.lang.String output)

  Handle a flush operation on the error stream

  Parameters:
    `output` - the error information being flushed.

### getOutputStream

    public java.io.OutputStream getOutputStream()

  Get the output stream for the redirector

  Returns:
    the redirector's output stream or null if no output has been configured

### getErrorStream

    public java.io.OutputStream getErrorStream()

  Get the error stream for the redirector

  Returns:
    the redirector's error stream or null if no output has been configured

### getInputStream

    public java.io.InputStream getInputStream()

  Get the input stream for the redirector

  Returns:
    the redirector's input stream or null if no output has been configured

### complete

    public void complete()
                  throws java.io.IOException

  Complete redirection. This operation will close any streams and create any specified property values.

  Throws:
    `java.io.IOException` - if the output properties cannot be read from their output streams.

### setProperties

    public void setProperties()

  Notify the `Redirector` that it is now okay to set any output and/or error properties.

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