py4j.commands

Class StreamCommand

java.lang.Object

py4j.commands.AbstractCommand

py4j.commands.StreamCommand

All Implemented Interfaces:

Command

public class StreamCommand
extends AbstractCommand

A StreamCommand is like a CallCommand, but returns the value directly.

Author:

Nick White

Field Summary

Fields

Modifier and Type	Field and Description
static String	STREAM_COMMAND_NAME

Fields inherited from class py4j.commands.AbstractCommand

commandName, connection, gateway

Constructor Summary

Constructors

Constructor and Description
StreamCommand()

Method Summary

Modifier and Type	Method and Description
void	execute(String commandName, BufferedReader reader, BufferedWriter writer)

Methods inherited from class py4j.commands.AbstractCommand

getArguments, getCommandName, getStringArguments, init, invokeMethod

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

STREAM_COMMAND_NAME

public static final String STREAM_COMMAND_NAME

See Also:

Constant Field Values

Constructor Detail

StreamCommand

public StreamCommand()

Method Detail

execute

public void execute(String commandName,
                    BufferedReader reader,
                    BufferedWriter writer)
             throws Py4JException,
                    IOException

Specified by:

execute in interface Command

Specified by:

execute in class AbstractCommand

Parameters:

commandName - The command name that was extracted of the command.

reader - The reader from which to read the command parts. Each command part are expected to be on a separate line and readable through BufferedReader.readLine().

writer - The writer to which the return value should be written.

Throws:

Py4JException - If an error occurs while executing the command. All exceptions except IOException caused by the reader and the writer should be wrapper in a Py4JException instance.

IOException - If an error occurs while using the reader or the writer.