py4j
Class ReflectionCommand
java.lang.Object
py4j.AbstractCommand
py4j.ReflectionCommand
- All Implemented Interfaces:
- Command
public class ReflectionCommand
- extends AbstractCommand
The ReflectionCommand is responsible for accessing packages, classes, and
static members. This is the command invoked when using the jvm property of a
JavaGateway on the Python side.
- Author:
- Barthelemy Dagenais
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
GET_UNKNOWN_SUB_COMMAND_NAME
public static final char GET_UNKNOWN_SUB_COMMAND_NAME
- See Also:
- Constant Field Values
GET_MEMBER_SUB_COMMAND_NAME
public static final char GET_MEMBER_SUB_COMMAND_NAME
- See Also:
- Constant Field Values
REFLECTION_COMMAND_NAME
public static final String REFLECTION_COMMAND_NAME
- See Also:
- Constant Field Values
rEngine
protected py4j.reflection.ReflectionEngine rEngine
ReflectionCommand
public ReflectionCommand()
init
public void init(Gateway gateway)
- Description copied from interface:
Command
Called when a command instance is created and assigned to a connection.
Called by GatewayConnection.initCommands(Gateway)
- Specified by:
init
in interface Command
- Overrides:
init
in class AbstractCommand
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.