com.highqsoft.util.ubh

Class ERGDataObserver

java.lang.Object

com.highqsoft.fwk.FwkColumnDataObserver

com.highqsoft.util.ubh.ERGDataObserver

All Implemented Interfaces:

FwkColumnDataObserverInterface, javax.infobus.DataItemChangeManager

Direct Known Subclasses:

ERGCharDataObserver, ERGDoubleDataObserver, ERGFloatDataObserver, ERGIntDataObserver, ERGLongDataObserver, ERGShortDataObserver, ERGUCharDataObserver, ERGUIntDataObserver, ERGULongDataObserver, ERGUShortDataObserver

public abstract class ERGDataObserver
extends FwkColumnDataObserver

The ERGDataObserver.

Since:

$Date: 2017/04/06 13:29:14 $

Version:

$Revision: 1.14 $

Author:

Andreas Hofmann

See Also:

Field Summary

Fields

Modifier and Type	Field and Description
protected java.nio.Buffer	buffer
protected java.io.RandomAccessFile	file
protected java.nio.channels.FileChannel	fileChannel
protected java.lang.String	fileSpec
protected java.nio.MappedByteBuffer	mappedByteBuffer
static java.lang.String	version

Fields inherited from class com.highqsoft.fwk.FwkColumnDataObserver

changeManager, flags, globalFlag, globalFlagValid, suspended

Constructor Summary

Constructors

Constructor and Description
ERGDataObserver(UBHInterface ubh, int signal, java.lang.String fileSpec) The constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract void	createBuffer() create the reading buffer.
protected void	finalize()
int	getCount() The the value count.
abstract int	getDataSizeInByte() get the size of one item in bytes.
java.lang.String	getVersion()
void	initializeFile() Get a data value.
static void	main(java.lang.String[] args) Main module of this application.
void	release() Request to release data.
void	releaseFile() Release the file.
protected int	seek(int index) Seek to the position of the current index.
void	setFlagAt(int index, short flag) Set a flag

Methods inherited from class com.highqsoft.fwk.FwkColumnDataObserver

addDataItemChangeListener, createScale, getFlagAt, getScale, isChangeManagerSuspended, isImplicit, removeDataItemChangeListener, setScale, suspendChangeManager

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.highqsoft.interfaces.fwk.FwkColumnDataObserverInterface

getNativeDatatype, getNativeValues, getNativeValues, getValueAt, setValueAt

Field Detail

version

public static final java.lang.String version

See Also:

Constant Field Values

file

protected java.io.RandomAccessFile file

fileChannel

protected java.nio.channels.FileChannel fileChannel

mappedByteBuffer

protected java.nio.MappedByteBuffer mappedByteBuffer

buffer

protected java.nio.Buffer buffer

fileSpec

protected java.lang.String fileSpec

Constructor Detail

ERGDataObserver

public ERGDataObserver(UBHInterface ubh,
               int signal,
               java.lang.String fileSpec)
                throws java.io.FileNotFoundException,
                       java.io.IOException

The constructor.

Parameters:

ubh - The universal binary header.

signal - the signal number.

fileSpec - the file specification.

Throws:

java.io.FileNotFoundException

java.io.IOException

Method Detail

getVersion

public java.lang.String getVersion()

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

release

public void release()

Request to release data.

Specified by:

release in interface FwkColumnDataObserverInterface

Overrides:

release in class FwkColumnDataObserver

releaseFile

public void releaseFile()

Release the file.

setFlagAt

public void setFlagAt(int index,
             short flag)

Set a flag

Specified by:

setFlagAt in interface FwkColumnDataObserverInterface

Overrides:

setFlagAt in class FwkColumnDataObserver

Parameters:

index - the index of the flag to changed.

flag - the new flag.

See Also:

FwkColumnAccessInterface

getCount

public int getCount()

The the value count.

Returns:

the total number of available values.

initializeFile

public void initializeFile()

Get a data value.

Parameters:

index - The index of the value.

getDataSizeInByte

public abstract int getDataSizeInByte()

get the size of one item in bytes.

Returns:

the size of one item.

createBuffer

protected abstract void createBuffer()

create the reading buffer.

seek

protected int seek(int index)
            throws java.lang.Exception

Seek to the position of the current index.

Parameters:

index - The index of the value.

Returns:

the index to be used inside the buffer.

Throws:

java.lang.Exception

main

public static void main(java.lang.String[] args)

Main module of this application. Normally this application is started via FwkFrame, FwkApplet or FwkApplication. In case somebody wants to run this application directly, this main method is provided. All it does is passing the responsibility directly to FwkFrame.