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 project component.

Since:
Ant 1.6

Constructor Summary
Redirector(ProjectComponent managingTask)
          Create a redirector instance for the given task
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 setAlwaysLog(boolean alwaysLog)
          If true, (error and non-error) output will be "teed", redirected as specified while being sent to Ant's logging mechanism as if no redirection had taken place.
 void setAppend(boolean append)
          Whether output should be appended to or overwrite an existing file.
 void setAppendProperties(boolean appendProperties)
          This Redirector's subordinate PropertyOutputStreams 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 FilterChains.
 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 FilterChains.
 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 FilterChains.
 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

Redirector

public Redirector(ProjectComponent managingTask)
Create a redirector instance for the given task

Parameters:
managingTask - the project component for which the redirector is to work
Since:
Ant 1.6.3
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 PropertyOutputStreams 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.

setAlwaysLog

public void setAlwaysLog(boolean alwaysLog)
If true, (error and non-error) output will be "teed", redirected as specified while being sent to Ant's logging mechanism as if no redirection had taken place. Defaults to false.

Parameters:
alwaysLog - boolean
Since:
Ant 1.6.3

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 FilterChains.

Parameters:
inputFilterChains - Vector containing FilterChain.

setOutputFilterChains

public void setOutputFilterChains(java.util.Vector outputFilterChains)
Set the output FilterChains.

Parameters:
outputFilterChains - Vector containing FilterChain.

setErrorFilterChains

public void setErrorFilterChains(java.util.Vector errorFilterChains)
Set the error FilterChains.

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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