Package jmri.implementation

Class DefaultMeter

java.lang.Object

jmri.implementation.AbstractNamedBean

jmri.implementation.AbstractAnalogIO

jmri.implementation.DefaultMeter

All Implemented Interfaces:

java.lang.Comparable<NamedBean>, AnalogIO, PropertyChangeProvider, Meter, NamedBean

Direct Known Subclasses:

DefaultMeter.DefaultCurrentMeter, DefaultMeter.DefaultVoltageMeter

public class DefaultMeter
extends AbstractAnalogIO
implements Meter

Abstract base class for current meter objects.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DefaultMeter.DefaultCurrentMeter	Default implementation of a current meter.
static class	DefaultMeter.DefaultVoltageMeter	Default implementation of a voltage meter.

Nested classes/interfaces inherited from interface jmri.AnalogIO

AnalogIO.AbsoluteOrRelative

Nested classes/interfaces inherited from interface jmri.Meter

Meter.Unit

Nested classes/interfaces inherited from interface jmri.NamedBean

NamedBean.BadNameException, NamedBean.BadSystemNameException, NamedBean.BadUserNameException, NamedBean.DisplayOptions, NamedBean.DuplicateSystemNameException

Field Summary

Fields inherited from class jmri.implementation.AbstractNamedBean

listenerRefs, mSystemName, register

Fields inherited from interface jmri.NamedBean

DISPLAY_NAME_FORMAT, INCONSISTENT, PROPERTY_STATE, QUOTED_NAME_FORMAT, UNKNOWN

Constructor Summary

Constructors

Constructor	Description
DefaultMeter(java.lang.String sys, Meter.Unit unit, double min, double max, double resolution, MeterUpdateTask updateTask)

Method Summary

Modifier and Type	Method	Description
protected boolean	cutOutOfBoundsValues()	Cut out of bounds values instead of throwing an exception?
void	disable()	Disable this meter
void	dispose()	Deactivate this object, so that it releases as many resources as possible and no longer effects others.
void	enable()	Enable this meter
AnalogIO.AbsoluteOrRelative	getAbsoluteOrRelative()	Is this AnalogIO absolute or relative?
java.lang.String	getBeanType()	For instances in the code where we are dealing with just a bean and a message needs to be passed to the user or in a log.
double	getMax()	Get the maximum value of this AnalogIO.
double	getMin()	Get the minimum value of this AnalogIO.
double	getResolution()	Get the resolution of this AnalogIO.
int	getState()	Provide generic access to internal state.
Meter.Unit	getUnit()
void	requestUpdateFromLayout()	Request an update from the layout.
protected void	sendValueToLayout(double value)	Sends the string to the layout.
void	setState(int s)	Provide generic access to internal state.

Methods inherited from class jmri.implementation.AbstractAnalogIO

compareSystemNameSuffix, getCommandedAnalogValue, getKnownAnalogValue, getState, setCommandedAnalogValue, setState, setValue

Methods inherited from class jmri.implementation.AbstractNamedBean

addPropertyChangeListener, addPropertyChangeListener, addPropertyChangeListener, addPropertyChangeListener, describeState, equals, firePropertyChange, getComment, getDisplayName, getDisplayName, getListenerRef, getListenerRefs, getNumPropertyChangeListeners, getProperty, getPropertyChangeListeners, getPropertyChangeListeners, getPropertyChangeListenersByReference, getPropertyKeys, getSystemName, getUserName, hashCode, removeProperty, removePropertyChangeListener, removePropertyChangeListener, setComment, setProperty, setUserName, toString, toStringSuffix, updateListenerRef, vetoableChange

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface jmri.AnalogIO

getCommandedAnalogValue, getKnownAnalogValue, getState, isConsistentValue, setCommandedAnalogValue, setState

Methods inherited from interface jmri.NamedBean

addPropertyChangeListener, addPropertyChangeListener, compareSystemNameSuffix, compareTo, describeState, getComment, getDisplayName, getDisplayName, getListenerRef, getListenerRefs, getNumPropertyChangeListeners, getProperty, getPropertyChangeListenersByReference, getPropertyKeys, getSystemName, getUsageReport, getUserName, removeProperty, setComment, setProperty, setUserName, toString, updateListenerRef, vetoableChange

Methods inherited from interface jmri.beans.PropertyChangeProvider

addPropertyChangeListener, addPropertyChangeListener, getPropertyChangeListeners, getPropertyChangeListeners, removePropertyChangeListener, removePropertyChangeListener

Constructor Detail

DefaultMeter

public DefaultMeter(@Nonnull
                    java.lang.String sys,
                    @Nonnull
                    Meter.Unit unit,
                    double min,
                    double max,
                    double resolution,
                    @Nonnull
                    MeterUpdateTask updateTask)

Method Detail

enable

public void enable()

Enable this meter

Specified by:

enable in interface Meter

disable

public void disable()

Disable this meter

Specified by:

disable in interface Meter

sendValueToLayout

protected void sendValueToLayout(double value)
                          throws JmriException

Sends the string to the layout. The string [u]must not[/u] be longer than the value of getMaximumLength() unless that value is zero. Some microcomputers have little memory and it's very important that this method is never called with too long strings.

Override this if the meter can send value to the layout.

Specified by:

sendValueToLayout in class AbstractAnalogIO

Parameters:

value - the desired string value

Throws:

JmriException - general error when setting the value fails

cutOutOfBoundsValues

protected boolean cutOutOfBoundsValues()

Cut out of bounds values instead of throwing an exception? For example, if the AnalogIO is a display, it could be desired to accept too long strings. On the other hand, if the AnalogIO is used to send a command, a too long string is an error.

Specified by:

cutOutOfBoundsValues in class AbstractAnalogIO

Returns:

true if long strings should be cut

setState

public void setState(int s)
              throws JmriException

Provide generic access to internal state.

This generally shouldn't be used by Java code; use the class-specific form instead (e.g. setCommandedState in Turnout). This is provided to make scripts access easier to read.

Specified by:

setState in interface NamedBean

Parameters:

s - the state

Throws:

JmriException - general error when setting the state fails

getState

public int getState()

Provide generic access to internal state.

This generally shouldn't be used by Java code; use the class-specific form instead (e.g. getCommandedState in Turnout). This is provided to make scripts easier to read.

Specified by:

getState in interface NamedBean

Returns:

the state

getBeanType

public java.lang.String getBeanType()

For instances in the code where we are dealing with just a bean and a message needs to be passed to the user or in a log.

Specified by:

getBeanType in interface NamedBean

Overrides:

getBeanType in class AbstractAnalogIO

Returns:

a string of the bean type, eg Turnout, Sensor etc

getUnit

public Meter.Unit getUnit()

Specified by:

getUnit in interface Meter

getMin

public double getMin()

Get the minimum value of this AnalogIO.

Specified by:

getMin in interface AnalogIO

Returns:

minimum value.

getMax

public double getMax()

Get the maximum value of this AnalogIO.

Specified by:

getMax in interface AnalogIO

Returns:

maximum value.

getResolution

public double getResolution()

Get the resolution of this AnalogIO.

Specified by:

getResolution in interface AnalogIO

Returns:

analog resolution.

getAbsoluteOrRelative

public AnalogIO.AbsoluteOrRelative getAbsoluteOrRelative()

Is this AnalogIO absolute or relative?

Specified by:

getAbsoluteOrRelative in interface AnalogIO

Returns:

if absolute or relative.

dispose

public void dispose()

Deactivate this object, so that it releases as many resources as possible and no longer effects others.

For example, if this object has listeners, after a call to this method it should no longer notify those listeners. Any native or system-wide resources it maintains should be released, including threads, files, etc.

It is an error to invoke any other methods on this object once dispose() has been called. Note, however, that there is no guarantee about behavior in that case.

Afterwards, references to this object may still exist elsewhere, preventing its garbage collection. But it's formally dead, and shouldn't be keeping any other objects alive. Therefore, this method should null out any references to other objects that this NamedBean contained.

Specified by:

dispose in interface Meter

Specified by:

dispose in interface NamedBean

Overrides:

dispose in class AbstractNamedBean

requestUpdateFromLayout

public void requestUpdateFromLayout()

Request an update from the layout.

Specified by:

requestUpdateFromLayout in interface AnalogIO