start() this routine gets called by the execute routine of the Execute class
it connects the PumpStreamHandler to the input/output/error streams of the process.
subclasses of P4HandlerAdapter must implement this routine
processing of one line of stdout or of stderr
Parameters: line - line of stdout or stderr to process
connects the handler to the stderr of the Perforce process
Parameters: is - stderr coming from Perforce throws: IOException - under unknown circumstances
connects the handler to the input stream into Perforce
used indirectly by tasks requiring to send specific standard input
such as p4label, p4change
Parameters: os - the stream bringing input to the p4 executable throws: IOException - under unknown circumstances
connects the handler to the stdout of the Perforce process
Parameters: is - stdout coming from Perforce throws: IOException - under unknown circumstances
this routine gets called by the execute routine of the Execute class
it connects the PumpStreamHandler to the input/output/error streams of the process.
throws: BuildException - if there is a error. See Also:org.apache.tools.ant.taskdefs.Execute.execute