org.apache.asn1.ber.digester.rules
Class PrimitiveIntDecodeRule

java.lang.Object
  org.apache.asn1.ber.digester.AbstractRule
      org.apache.asn1.ber.digester.rules.PrimitiveIntDecodeRule

All Implemented Interfaces:

Rule

Direct Known Subclasses:

PrimitiveEnumDecodeRule

public class PrimitiveIntDecodeRule

extends AbstractRule

A rule to Decode a BER encoded ASN.1 INTEGER into a Java primitive int.

The bytes to form the integer are extracted from the BER value which may arrive in multiple chunks. The individual bytes are temporarily stored within a 4 byte array while incrementing a counter to track the capture. Once gathered the bytes are decoded into a int in the finish

As a side effect once the decode is complete, the primitive value is pushed onto the primitive int stack to be utilized by other rules later. If there is a loss of precision where the ASN.1 INTEGER is larger or smaller than the maximum or minimum value of a Java primitive integer an exception is thrown.

Version:

$Rev: 157644 $

Author:

Apache Directory Project

Field Summary

private int	length the number of bytes we must read
private int	pos the current 8 bit position to fill in the integer
private TagEnum	tag the tag this rule accepts
private byte[]	value the bytes used to form the Java primitive integer

Fields inherited from class org.apache.asn1.ber.digester.AbstractRule

Constructor Summary

PrimitiveIntDecodeRule()
Creates a default primitive integer decoding rule that only accepts tags of UniversalTag.INTEGER.

PrimitiveIntDecodeRule(TagEnum tag)
Creates a default primitive integer decoding rule that only accepts tags of UniversalTag.INTEGER.

Method Summary

(package private) boolean	equals(byte bite, int ii) Used for testing to check and see if a value of the byte buffer has been set after a value event.
void	finish() Called when the tlv has been completely consumed.
void	length(int length) Called when the length of a TLV is encountered.
void	tag(int id, boolean isPrimitive, TypeClass typeClass) Called when the tag of the matched TLV is encountered.
void	value(java.nio.ByteBuffer buf) Called when a peice of the value is available.

Methods inherited from class org.apache.asn1.ber.digester.AbstractRule

getDigester, setDigester

Methods inherited from class java.lang.Object

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

Field Detail

value

private final byte[] value

the bytes used to form the Java primitive integer

pos

private int pos

the current 8 bit position to fill in the integer

length

private int length

the number of bytes we must read

tag

private final TagEnum tag

the tag this rule accepts

Constructor Detail

PrimitiveIntDecodeRule

public PrimitiveIntDecodeRule()

Creates a default primitive integer decoding rule that only accepts tags of UniversalTag.INTEGER.

PrimitiveIntDecodeRule

public PrimitiveIntDecodeRule(TagEnum tag)

Creates a default primitive integer decoding rule that only accepts tags of UniversalTag.INTEGER.

Method Detail

tag

public void tag(int id,
                boolean isPrimitive,
                TypeClass typeClass)

Description copied from interface: Rule

Called when the tag of the matched TLV is encountered.

Specified by:

tag in interface Rule

Overrides:

tag in class AbstractRule

length

public void length(int length)

Description copied from interface: Rule

Called when the length of a TLV is encountered.

Specified by:

length in interface Rule

Overrides:

length in class AbstractRule

value

public void value(java.nio.ByteBuffer buf)

Description copied from interface: Rule

Called when a peice of the value is available.

Specified by:

value in interface Rule

Overrides:

value in class AbstractRule

finish

public void finish()

Description copied from interface: Rule

Called when the tlv has been completely consumed.

Specified by:

finish in interface Rule

Overrides:

finish in class AbstractRule

equals

boolean equals(byte bite,
               int ii)

Used for testing to check and see if a value of the byte buffer has been set after a value event.

Parameters:

bite - the byte value to check

ii - the index to check the byte for in the values array

Returns:

true if the byte value matches the byte value in the array