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## org.apache.tools.ant
Interface BuildLogger

All Superinterfaces:
  BuildListener, java.util.EventListener

All Known Implementing Classes:
  CommonsLoggingListener, DefaultLogger, RecorderEntry, XmlLogger

public interface BuildLogger
extends BuildListener

Interface used by Ant to log the build output. A build logger is a build listener which has the 'right' to send output to the ant log, which is usually `System.out` unless redirected by the `-logfile` option.

Method Summary
`void` | `setEmacsMode(boolean emacsMode)` Sets this logger to produce emacs (and other editor) friendly output.
`void` | `setErrorPrintStream(java.io.PrintStream err)` Sets the output stream to which this logger is to send error messages.
`void` | `setMessageOutputLevel(int level)` Sets the highest level of message this logger should respond to.
`void` | `setOutputPrintStream(java.io.PrintStream output)` Sets the output stream to which this logger is to send its output.

Methods inherited from interface org.apache.tools.ant.BuildListener
`buildFinished, buildStarted, messageLogged, targetFinished, targetStarted, taskFinished, taskStarted`

Method Detail

### setMessageOutputLevel

    public void setMessageOutputLevel(int level)

  Sets the highest level of message this logger should respond to. Only messages with a message level lower than or equal to the given level should be written to the log.

  Constants for the message levels are in the `Project` class. The order of the levels, from least to most verbose, is `MSG_ERR`, `MSG_WARN`, `MSG_INFO`, `MSG_VERBOSE`, `MSG_DEBUG`.

  Parameters:
    `level` - the logging level for the logger.

### setOutputPrintStream

    public void setOutputPrintStream(java.io.PrintStream output)

  Sets the output stream to which this logger is to send its output.

  Parameters:
    `output` - The output stream for the logger. Must not be `null`.

### setEmacsMode

    public void setEmacsMode(boolean emacsMode)

  Sets this logger to produce emacs (and other editor) friendly output.

  Parameters:
    `emacsMode` - `true` if output is to be unadorned so that emacs and other editors can parse files names, etc.

### setErrorPrintStream

    public void setErrorPrintStream(java.io.PrintStream err)

  Sets the output stream to which this logger is to send error messages.

  Parameters:
    `err` - The error stream for the logger. Must not be `null`.

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