Package py4j.commands
Class ReflectionCommand
- java.lang.Object
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- py4j.commands.AbstractCommand
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- py4j.commands.ReflectionCommand
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- 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.
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Field Summary
Fields Modifier and Type Field Description static char
GET_JAVA_LANG_CLASS_SUB_COMMAND_NAME
static char
GET_MEMBER_SUB_COMMAND_NAME
static char
GET_UNKNOWN_SUB_COMMAND_NAME
static java.lang.String
REFLECTION_COMMAND_NAME
protected ReflectionEngine
rEngine
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Fields inherited from class py4j.commands.AbstractCommand
commandName, connection, gateway
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Constructor Summary
Constructors Constructor Description ReflectionCommand()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
execute(java.lang.String commandName, java.io.BufferedReader reader, java.io.BufferedWriter writer)
void
init(Gateway gateway, Py4JServerConnection connection)
Called when a command instance is created and assigned to a connection.-
Methods inherited from class py4j.commands.AbstractCommand
getArguments, getCommandName, getStringArguments, invokeMethod
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Field Detail
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GET_UNKNOWN_SUB_COMMAND_NAME
public static final char GET_UNKNOWN_SUB_COMMAND_NAME
- See Also:
- Constant Field Values
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GET_MEMBER_SUB_COMMAND_NAME
public static final char GET_MEMBER_SUB_COMMAND_NAME
- See Also:
- Constant Field Values
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GET_JAVA_LANG_CLASS_SUB_COMMAND_NAME
public static final char GET_JAVA_LANG_CLASS_SUB_COMMAND_NAME
- See Also:
- Constant Field Values
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REFLECTION_COMMAND_NAME
public static final java.lang.String REFLECTION_COMMAND_NAME
- See Also:
- Constant Field Values
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rEngine
protected ReflectionEngine rEngine
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Method Detail
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execute
public void execute(java.lang.String commandName, java.io.BufferedReader reader, java.io.BufferedWriter writer) throws Py4JException, java.io.IOException
- Specified by:
execute
in interfaceCommand
- Specified by:
execute
in classAbstractCommand
- 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 throughBufferedReader.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 aPy4JException
instance.java.io.IOException
- If an error occurs while using the reader or the writer.
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init
public void init(Gateway gateway, Py4JServerConnection connection)
Description copied from interface:Command
Called when a command instance is created and assigned to a connection.
- Specified by:
init
in interfaceCommand
- Overrides:
init
in classAbstractCommand
connection
- thePy4JServerConnection
this socket is assigned to
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