Package i5.las2peer.tools

Class CommandPrompt

java.lang.Object

i5.las2peer.tools.CommandPrompt

public class CommandPrompt
extends Object

A simple command line for executing commands, generating new instances and handling local variables.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	CommandPrompt.ReturnStatus	Enumeration for different return status codes of executed lines.

Constructor Summary

Constructors

Constructor	Description
CommandPrompt()	create a new unbound prompt
CommandPrompt(Object boundTo)	create a new prompt bound to the given object

Method Summary

Modifier and Type	Method	Description
CommandPrompt.ReturnStatus	handleAssignment(String line)	handle an assignment command
Object	handleCommand(String command)	handle a command, i.e.
CommandPrompt.ReturnStatus	handleLine(String line)	handle a line of input
Object	handleNew(String command)	handle a NEW command, e.g.
CommandPrompt.ReturnStatus	handlePrint(String line)	print the value of all given local variables
CommandPrompt.ReturnStatus	localCommand(String line)	check, if the given line contains (starts with) a local command and execute it.
static void	main(String[] argv)	start a command line
void	printException()	print the last caught exception / throwable
void	printHelp()	print a help message
void	printVersion()	Prints the las2peer version.
CommandPrompt.ReturnStatus	prompt()	print a simple prompt and wait for input
void	startPrompt()	loop through input and execution

Methods inherited from class java.lang.Object

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

Constructor Details

CommandPrompt

public CommandPrompt()

create a new unbound prompt

CommandPrompt

public CommandPrompt(Object boundTo)

create a new prompt bound to the given object

Parameters:

boundTo -

Method Details

handleAssignment

public CommandPrompt.ReturnStatus handleAssignment(String line)

handle an assignment command

Parameters:

line -

Returns:

status code

handleNew

public Object handleNew(String command)
                 throws Exception

handle a NEW command, e.g. try to create a new instance of the given class with the possibly given parameters

Parameters:

command -

Returns:

result of the new instantiation

Throws:

Exception

handleCommand

public Object handleCommand(String command)
                     throws Exception

handle a command, i.e. a static method or a class method of a local variable or the bound object

Parameters:

command -

Returns:

result of the invoked operation

Throws:

Exception

handleLine

public CommandPrompt.ReturnStatus handleLine(String line)

handle a line of input

Parameters:

line -

Returns:

return status code

printException

public void printException()

print the last caught exception / throwable

handlePrint

public CommandPrompt.ReturnStatus handlePrint(String line)

print the value of all given local variables

Parameters:

line -

Returns:

return status code

localCommand

public CommandPrompt.ReturnStatus localCommand(String line)

check, if the given line contains (starts with) a local command and execute it.

Parameters:

line -

Returns:

return status code

printHelp

public void printHelp()

print a help message

printVersion

public void printVersion()

Prints the las2peer version.

prompt

public CommandPrompt.ReturnStatus prompt()

print a simple prompt and wait for input

Returns:

return status code

startPrompt

public void startPrompt()

loop through input and execution

main

public static void main(String[] argv)
                 throws ClassNotFoundException

start a command line

Parameters:

argv -

Throws:

ClassNotFoundException