au.gov.amsa.ais

Class AisExtractor

java.lang.Object

au.gov.amsa.ais.AisExtractor

public class AisExtractor
extends Object

Utility class for extracting parts of an ais message as unsigned integers, signed integers or strings.

Author:

dxm

Constructor Summary

Constructors

Constructor and Description
AisExtractor(String message, Integer minLength, int padBits) Constructor.

Method Summary

Modifier and Type	Method and Description
int	getMessageId() Returns the message id field (the first 6 characters of the decoded message).
int	getSignedValue(int from, int to) Returns a signed integer value using the bits from character position start to position stop in the decoded message.
String	getString(int from, int to)
int	getValue(int from, int to) Returns an unsigned integer value using the bits from character position start to position stop in the decoded message.

Methods inherited from class java.lang.Object

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

Constructor Detail

AisExtractor

public AisExtractor(String message,
                    Integer minLength,
                    int padBits)

Constructor. If message once decoded is less than minLength then throws AisParseException.

Parameters:

message -

minLength -

Method Detail

getMessageId

public int getMessageId()

Returns the message id field (the first 6 characters of the decoded message).

Returns:

getValue

public int getValue(int from,
                    int to)

Returns an unsigned integer value using the bits from character position start to position stop in the decoded message.

Parameters:

from -

to -

Returns:

getSignedValue

public int getSignedValue(int from,
                          int to)

Returns a signed integer value using the bits from character position start to position stop in the decoded message.

Parameters:

from -

to -

Returns:

getString

public String getString(int from,
                        int to)