org.glyptodon.guacamole.protocol

Class GuacamoleParser

java.lang.Object

org.glyptodon.guacamole.protocol.GuacamoleParser

All Implemented Interfaces:

Iterator<GuacamoleInstruction>

public class GuacamoleParser
extends Object
implements Iterator<GuacamoleInstruction>

Parser for the Guacamole protocol. Arbitrary instruction data is appended, and instructions are returned as a result. Invalid instructions result in exceptions.

Author:

Michael Jumper

Field Summary

Fields

Modifier and Type	Field and Description
static int	INSTRUCTION_MAX_DIGITS The maximum number of digits to allow per length prefix.
static int	INSTRUCTION_MAX_ELEMENTS The maximum number of elements per instruction, including the opcode.
static int	INSTRUCTION_MAX_LENGTH The maximum number of characters per instruction.

Constructor Summary

Constructors

Constructor and Description
GuacamoleParser()

Method Summary

Methods

Modifier and Type	Method and Description
int	append(char[] chunk) Appends data from the given buffer to the current instruction.
int	append(char[] chunk, int offset, int length) Appends data from the given buffer to the current instruction.
boolean	hasNext()
GuacamoleInstruction	next()
void	remove()

Methods inherited from class java.lang.Object

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

Field Detail

INSTRUCTION_MAX_LENGTH

public static final int INSTRUCTION_MAX_LENGTH

The maximum number of characters per instruction.

See Also:

Constant Field Values

INSTRUCTION_MAX_DIGITS

public static final int INSTRUCTION_MAX_DIGITS

The maximum number of digits to allow per length prefix.

See Also:

Constant Field Values

INSTRUCTION_MAX_ELEMENTS

public static final int INSTRUCTION_MAX_ELEMENTS

The maximum number of elements per instruction, including the opcode.

See Also:

Constant Field Values

Constructor Detail

GuacamoleParser

public GuacamoleParser()

Method Detail

append

public int append(char[] chunk,
         int offset,
         int length)
           throws GuacamoleException

Appends data from the given buffer to the current instruction.

Parameters:

chunk - The buffer containing the data to append.

offset - The offset within the buffer where the data begins.

length - The length of the data to append.

Returns:

The number of characters appended, or 0 if complete instructions have already been parsed and must be read via next() before more data can be appended.

Throws:

GuacamoleException - If an error occurs while parsing the new data.

append

public int append(char[] chunk)
           throws GuacamoleException

Appends data from the given buffer to the current instruction.

Parameters:

chunk - The data to append.

Returns:

The number of characters appended, or 0 if complete instructions have already been parsed and must be read via next() before more data can be appended.

Throws:

GuacamoleException - If an error occurs while parsing the new data.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<GuacamoleInstruction>

next

public GuacamoleInstruction next()

Specified by:

next in interface Iterator<GuacamoleInstruction>

remove

public void remove()

Specified by:

remove in interface Iterator<GuacamoleInstruction>