gcspy.comm
Class CommandStream

java.lang.Object
  gcspy.comm.CommandStream

Direct Known Subclasses:

Interpreter, ShapeStream

public class CommandStream
extends java.lang.Object

Parses a buffered I/O stream and invokes the commands in it

Author:

Tony Printezis

Field Summary

protected Command[]	cmds An array of GCspy commands
static int	FIRST_AVAILABLE_CMD The index of the first command
protected int	max The index of the largest numbered command
protected BufferedOutput	output The output buffer

Constructor Summary

CommandStream()
Create an emty command stream

CommandStream(Command[] cmds)
Create a new array of commands

CommandStream(int len)
Create a new array of commands

Method Summary

void	execute(BufferedInput input) Read a command and execute it
void	finish() Finish the command stream
void	finish(BufferedOutput output) Finish the command stream for a BufferedOutput
byte	getCmd(BufferedInput input) Get a command from a BufferedInput
void	putCmd(BufferedOutput output, byte cmd) Put a command into a BufferedOutput
void	putCmd(byte cmd) Put a command into the output buffer
void	setBufferedOutput(BufferedOutput output) Set the Buffered Output.
void	start() Start the command stream
protected void	start(BufferedOutput output) Start a command using a BufferedOutput

Methods inherited from class java.lang.Object

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

Field Detail

cmds

protected Command[] cmds

An array of GCspy commands

max

protected int max

The index of the largest numbered command

output

protected BufferedOutput output

The output buffer

FIRST_AVAILABLE_CMD

public static final int FIRST_AVAILABLE_CMD

The index of the first command

See Also:

Constant Field Values

Constructor Detail

CommandStream

public CommandStream(Command[] cmds)

Create a new array of commands

Parameters:

cmds - The new commands

CommandStream

public CommandStream(int len)

Create a new array of commands

Parameters:

len - The number of commands

CommandStream

public CommandStream()

Create an emty command stream

Method Detail

execute

public void execute(BufferedInput input)

Read a command and execute it

Parameters:

input - The BufferedInput from which to read the command

setBufferedOutput

public void setBufferedOutput(BufferedOutput output)

Set the Buffered Output. used when we are creating a command stream looks a bit nicer rather than always passing the output

start

public void start()

Start the command stream

start

protected void start(BufferedOutput output)

Start a command using a BufferedOutput

Parameters:

output - The BufferedOutput

finish

public void finish()

Finish the command stream

finish

public void finish(BufferedOutput output)

Finish the command stream for a BufferedOutput

Parameters:

output - The BufferedOutput

putCmd

public void putCmd(byte cmd)

Put a command into the output buffer

Parameters:

cmd - The command

putCmd

public void putCmd(BufferedOutput output,
                   byte cmd)

Put a command into a BufferedOutput

Parameters:

output - The BufferedOutput

cmd - The command

getCmd

public byte getCmd(BufferedInput input)

Get a command from a BufferedInput

Parameters:

input - The VufferedInput

Returns:

The command