org.vishia.inspectorTarget

Class InspcDataInfo

java.lang.Object

org.vishia.inspectorTarget.InspcDataInfo

public class InspcDataInfo
extends java.lang.Object

This class contains the description to access to one variable in memory to get a value not by path but by a handle. The structure stores the type, memory address and some access info. In Java the memory address is the Object reference where the Field is located. In C it is adapted in the same kind to support Java2C-translation.

Note that this struct in C should be used less memory because it is an array element of a large array (1024..4096). Note that the length of integer should regard 4-byte-boundary for special processors which does not support a integer on any boundary.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) MemSegmJc	addr The address and maybe segment in address space of the variable.
(package private) int	check This check code should be sent from request to safety the correctness of request.
(package private) int	lastUsed timestamp where it was used lastly.
(package private) short	lengthData If it is a recording order, size of the buffer.
(package private) FieldJc	reflectionField Address and Segment of the value.
(package private) int	secondOfCreation Timestamp seconds after 1970 of creation.
(package private) byte	sizeofValue Nr of bytes of the type to read and transfer.
(package private) byte	typeValue The type of the value, to send in telegram, It is the definitions in InspcDataExchangeAccess.kScalarTypes + ClassJc.REFLECTION_int32 etc.
static int	version Version, history and license 2014-09-21 Hartmut comment and Java4C 2012-04-07 Hartmut created, converted from the C implementation.

Constructor Summary

Constructors

Constructor and Description
InspcDataInfo()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

version

public static final int version

Version, history and license

• 2014-09-21 Hartmut comment and Java4C
• 2012-04-07 Hartmut created, converted from the C implementation.
• 2006-00-00 Hartmut created for C/C++

Copyright/Copyleft: For this source the LGPL Lesser General Public License, published by the Free Software Foundation is valid. It means:

1. You can use this source without any restriction for any desired purpose.
2. You can redistribute copies of this source to everybody.
3. Every user of this source, also the user of redistribute copies with or without payment, must accept this license for further using.
4. But the LPGL ist not appropriate for a whole software product, if this source is only a part of them. It means, the user must publish this part of source, but don't need to publish the whole source of the own product.
5. You can study and modify (improve) this source for own using or for redistribution, but you have to license the modified sources likewise under this LGPL Lesser General Public License. You mustn't delete this Copyright/Copyleft inscription in this source file.

If you are intent to use this sources without publishing its usage, you can get a second license subscribing a special contract with the author.

See Also:

Constant Field Values

lastUsed

int lastUsed

timestamp where it was used lastly. The timestamp may be any unit of a target system. It is wrapping around. Use the difference between currentTime - lastUsed to test which element is the oldest one. If this element is ==0 then it is unused. don't set =0. A millisecond wraps in about 3 weeks.

addr

final MemSegmJc addr

The address and maybe segment in address space of the variable.

reflectionField

FieldJc reflectionField

Address and Segment of the value. @java2c=simpleRef.

sizeofValue

byte sizeofValue

Nr of bytes of the type to read and transfer.

typeValue

byte typeValue

The type of the value, to send in telegram, It is the definitions in InspcDataExchangeAccess.kScalarTypes + ClassJc.REFLECTION_int32 etc. negative value is from 128..255 If 0, than the entry is free.

lengthData

short lengthData

If it is a recording order, size of the buffer.

check

int check

This check code should be sent from request to safety the correctness of request. seconds: 65536 = 18 h. Don't start at 0. A reset on target seems to have a valid check.

secondOfCreation

int secondOfCreation

Timestamp seconds after 1970 of creation. An item is only valid for a defined time. This is because the check may be repeated in a longer time spread.

Constructor Detail

InspcDataInfo

public InspcDataInfo()