public Field(JsonString name, Schema schema, boolean isOptional) {
JaqlUtil.enforceNonNull(name);
JaqlUtil.enforceNonNull(schema);
this.name = FieldNameCache.get(name);
this.isOptional = isOptional;
this.schema = schema;
}
private void initProcess(Context context) throws Exception {
ProcessBuilder pb = new ProcessBuilder();
if (cmd instanceof JsonString) {
String tmp = ((JsonString) cmd).toString();
String[] cmdArray = tmp.split(" ");
ArrayList<String> array = new ArrayList<String>();
for (String s : cmdArray) {
if (s.length() > 0) array.add(s.trim());
}
pb.command(array);
}
Configuration cfg = new Configuration();
File directory = new File(cfg.get("mapred.local.dir", "."));
pb.directory(directory);
// unset environment variables that jvm dump to stderr
pb.environment().remove("_JAVA_OPTIONS");
pb.environment().remove("JAVA_TOOL_OPTIONS");
process = pb.start();
ErrorThread errorThread = new ErrorThread();
errorThread.start();
stdin = process.getInputStream();
stdout = process.getOutputStream();
OutputAdapter outAdapter =
(OutputAdapter) JaqlUtil.getAdapterStore().output.getAdapter(writeOpts);
if (!(outAdapter instanceof StreamOutputAdapter))
throw new IllegalArgumentException(
"The adapter of writeOpts must be an instance of com.ibm.jaql.io.stream.StreamOutputAdapter");
((StreamOutputAdapter) outAdapter).setDefaultOutput(stdout);
outAdapter.open();
writer = outAdapter.getWriter();
InputAdapter inAdapter = (InputAdapter) JaqlUtil.getAdapterStore().input.getAdapter(readOpts);
if (!(inAdapter instanceof StreamInputAdapter))
throw new IllegalArgumentException(
"The adapter of readOpts must be an instance of com.ibm.jaql.io.stream.ExternalCallStreamInputAdapter");
((StreamInputAdapter) inAdapter).setInputStream(stdin);
inAdapter.open();
reader = inAdapter.iter();
}
