Package py4j.commands
Class ReflectionCommand
java.lang.Object
py4j.commands.AbstractCommand
py4j.commands.ReflectionCommand
- All Implemented Interfaces:
Command
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
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final char
static final char
static final char
static final String
protected ReflectionEngine
Fields inherited from class py4j.commands.AbstractCommand
commandName, connection, gateway
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
execute
(String commandName, BufferedReader reader, 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 Details
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GET_UNKNOWN_SUB_COMMAND_NAME
public static final char GET_UNKNOWN_SUB_COMMAND_NAME- See Also:
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GET_MEMBER_SUB_COMMAND_NAME
public static final char GET_MEMBER_SUB_COMMAND_NAME- See Also:
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GET_JAVA_LANG_CLASS_SUB_COMMAND_NAME
public static final char GET_JAVA_LANG_CLASS_SUB_COMMAND_NAME- See Also:
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REFLECTION_COMMAND_NAME
- See Also:
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rEngine
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Constructor Details
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ReflectionCommand
public ReflectionCommand()
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Method Details
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execute
public void execute(String commandName, BufferedReader reader, BufferedWriter writer) throws Py4JException, 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.IOException
- If an error occurs while using the reader or the writer.
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init
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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