public StreamSink createStreamSink(ServiceContext context, Flow flow) {
List<String> commandList = new ArrayList<String>();
String cmd = command.evaluateString(context, flow);
commandList.add(cmd);
for (int i = 0; i < commandArgs.length; ++i) {
String arg = commandArgs[i].evaluateString(context, flow);
commandList.add(arg);
}
ProcessBuilder processBuilder = new ProcessBuilder(commandList);
Map<String, String> environment = processBuilder.environment();
for (int i = 0; i < envVariableFactories.length; ++i) {
EnvVariable envVariable = envVariableFactories[i].createEnvVariable(context, flow);
environment.put(envVariable.getName(), envVariable.getValue());
}
String directory = dirResolver.evaluateAsString(flow.getParameters(), flow.getRecord());
if (directory.length() > 0) {
File file = new File(directory);
processBuilder.directory(file);
}
StreamSink streamSink = new CommandSink(processBuilder, charset);
return streamSink;
}
