org.posper.tpv.scale

Class DeviceScale

java.lang.Object

org.posper.tpv.scale.DeviceScale

All Implemented Interfaces:

de.arcasys.posper_lib.scale.Dialog6, de.arcasys.posper_lib.scale.Scale

public class DeviceScale
extends Object
implements de.arcasys.posper_lib.scale.Scale, de.arcasys.posper_lib.scale.Dialog6

This class handles creation of, and access to, the POS scale

Author:

Adrian Romero, Jamie Campbell

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DeviceScale(String scaleType) Creates a new instance of DeviceScale

Method Summary

Modifier and Type	Method and Description
void	close() This is only needed if the scale device would change on runtime, like for test purposes.
static boolean	existsScale()
String	getDeviceType()
static DeviceScale	getInstance()
static DeviceScale	getInstance(String scaleType)
String	getRawOutput()
de.arcasys.posper_lib.scale.Dialog6Result	getWeight(Double pricePerUnit)
de.arcasys.posper_lib.scale.Dialog6Result	getWeight(Double pricePerUnit, int tare)
de.arcasys.posper_lib.scale.Dialog6Result	getWeight(Double pricePerUnit, int tare, String text)
void	nullTare()
Double	readPrecWeight()
Double	readWeight()

Methods inherited from class java.lang.Object

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

Constructor Detail

DeviceScale

protected DeviceScale(String scaleType)
               throws de.arcasys.posper_lib.scale.Exceptions.ScaleFatalException

Creates a new instance of DeviceScale

Parameters:

scaleType - The scale type, optionally followed by a colon and a comma separated string with one or more of the following options:

• port (default: /dev/ttyUSB0)
• speed=speed-value (default: 9600)
• flowcontrol=NONE|RTSCTS|XONXOFF (default: NONE)
• stopbits=STOP_1,STOP_1_5!STOP_2 (default: STOP_1)
• databits=DATA_5|DATA_6|DATA_7|DATA_8 (default: DATA_7 for Dialog8, DATA_8 else
• parity=parity=NONE|ODD|EVEN|MARK|SPACE (default: ODD for Dialog6, NONE else)

These options and defaults are valid only for the following types of scales:

• Generic
• GenericCont
• Dialog6

Other types of scales may implement their own fixed defaults.

Throws:

de.arcasys.posper_lib.scale.Exceptions.ScaleFatalException:

de.arcasys.posper_lib.scale.Exceptions.ScaleFatalException

Method Detail

getInstance

public static DeviceScale getInstance(String scaleType)
                               throws de.arcasys.posper_lib.scale.Exceptions.ScaleFatalException

Throws:

de.arcasys.posper_lib.scale.Exceptions.ScaleFatalException

close

public void close()

This is only needed if the scale device would change on runtime, like for test purposes.

Specified by:

close in interface de.arcasys.posper_lib.scale.Scale

getInstance

public static DeviceScale getInstance()

existsScale

public static boolean existsScale()

readWeight

public Double readWeight()
                  throws de.arcasys.posper_lib.scale.Exceptions.ScaleException

Specified by:

readWeight in interface de.arcasys.posper_lib.scale.Scale

Throws:

de.arcasys.posper_lib.scale.Exceptions.ScaleException

readPrecWeight

public Double readPrecWeight()
                      throws de.arcasys.posper_lib.scale.Exceptions.ScaleException

Specified by:

readPrecWeight in interface de.arcasys.posper_lib.scale.Scale

Throws:

de.arcasys.posper_lib.scale.Exceptions.ScaleException

getRawOutput

public String getRawOutput()

Specified by:

getRawOutput in interface de.arcasys.posper_lib.scale.Scale

getWeight

public de.arcasys.posper_lib.scale.Dialog6Result getWeight(Double pricePerUnit)

Specified by:

getWeight in interface de.arcasys.posper_lib.scale.Dialog6

getDeviceType

public String getDeviceType()

Specified by:

getDeviceType in interface de.arcasys.posper_lib.scale.Scale

nullTare

public void nullTare()

Specified by:

nullTare in interface de.arcasys.posper_lib.scale.Scale

getWeight

public de.arcasys.posper_lib.scale.Dialog6Result getWeight(Double pricePerUnit,
                                                           int tare)

Specified by:

getWeight in interface de.arcasys.posper_lib.scale.Dialog6

getWeight

public de.arcasys.posper_lib.scale.Dialog6Result getWeight(Double pricePerUnit,
                                                           int tare,
                                                           String text)

Specified by:

getWeight in interface de.arcasys.posper_lib.scale.Dialog6