Package jmri.implementation

Class AbstractSignalHead

java.lang.Object

jmri.implementation.AbstractNamedBean

jmri.implementation.AbstractSignalHead

All Implemented Interfaces:

java.beans.VetoableChangeListener, java.lang.Comparable<NamedBean>, java.util.EventListener, PropertyChangeProvider, NamedBean, Signal, SignalHead

Direct Known Subclasses:

DccSignalHead, DefaultSignalHead

public abstract class AbstractSignalHead
extends AbstractNamedBean
implements SignalHead, java.beans.VetoableChangeListener

Abstract class providing the basic logic of the SignalHead interface.

Nested Class Summary

Nested classes/interfaces inherited from interface jmri.NamedBean

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

Field Summary

Fields

Modifier and Type	Field	Description
protected int	mAppearance
protected boolean	mHeld	By default, signals are not held.
protected boolean	mLit	By default, signals are lit.

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

Fields inherited from interface jmri.SignalHead

DARK, FLASHGREEN, FLASHLUNAR, FLASHRED, FLASHYELLOW, GREEN, HELD, LUNAR, RED, YELLOW

Constructor Summary

Constructors

Constructor	Description
AbstractSignalHead(java.lang.String systemName)
AbstractSignalHead(java.lang.String systemName, java.lang.String userName)

Method Summary

Modifier and Type	Method	Description
int	getAppearance()	Get the Signal Head Appearance.
java.lang.String	getAppearanceKey()	Get the current Signal Head Appearance Key.
java.lang.String	getAppearanceKey(int appearance)	Get the Appearance Key for a particular Appearance.
java.lang.String	getAppearanceName()	Get the current appearance name.
java.lang.String	getAppearanceName(int appearance)	Get the Appearance Name for a particular Appearance.
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.
static java.lang.String	getDefaultStateName(int appearance)	Get a localized text describing appearance from the corresponding state index.
static java.lang.String[]	getDefaultValidStateNames()
static int[]	getDefaultValidStates()
boolean	getHeld()	"Held" parameter is just tracked and notified.
boolean	getLit()	Default behavior for "lit" parameter is to track value and return it.
int	getState()	Implement a shorter name for getAppearance.
java.lang.String[]	getValidStateKeys()	Get an array of non-localized appearance keys valid for the mast type.
java.lang.String[]	getValidStateNames()	Get an array of localized appearance descriptions valid for the mast type.
int[]	getValidStates()	Get an array of appearance indexes valid for the mast type.
boolean	isAtStop()	Determine whether this signal shows an aspect or appearance that forbid travel past it.
boolean	isCleared()	Determine whether this signal shows an aspect or appearance that allows travel past it, e.g. it's "been cleared".
boolean	isShowingRestricting()	Determine whether this signal shows an aspect or appearance that allows travel past it only at restricted speed.
abstract boolean	isTurnoutUsed(Turnout t)	Check if a given turnout is used on this head.
void	setState(int s)	Implement a shorter name for setAppearance.
void	vetoableChange(java.beans.PropertyChangeEvent evt)

Methods inherited from class jmri.implementation.AbstractNamedBean

addPropertyChangeListener, addPropertyChangeListener, addPropertyChangeListener, addPropertyChangeListener, compareSystemNameSuffix, describeState, dispose, 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

Methods inherited from class java.lang.Object

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

Methods inherited from interface jmri.NamedBean

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

Methods inherited from interface jmri.beans.PropertyChangeProvider

addPropertyChangeListener, addPropertyChangeListener, getPropertyChangeListeners, getPropertyChangeListeners, removePropertyChangeListener, removePropertyChangeListener

Methods inherited from interface jmri.SignalHead

setAppearance, setHeld, setLit

Field Detail

mAppearance

protected int mAppearance

mLit

protected boolean mLit

By default, signals are lit.

mHeld

protected boolean mHeld

By default, signals are not held.

Constructor Detail

AbstractSignalHead

public AbstractSignalHead(java.lang.String systemName,
                          java.lang.String userName)

AbstractSignalHead

public AbstractSignalHead(java.lang.String systemName)

Method Detail

getAppearanceName

@Nonnull
public java.lang.String getAppearanceName(int appearance)

Get the Appearance Name for a particular Appearance.

Specified by:

getAppearanceName in interface SignalHead

Parameters:

appearance - id for the Name.

Returns:

the Appearance Name, or empty String if unknown.

getAppearanceName

@Nonnull
public java.lang.String getAppearanceName()

Get the current appearance name.

Specified by:

getAppearanceName in interface SignalHead

Returns:

Name of the Appearance, e.g. "Dark" or "Flashing Red"

getAppearanceKey

@Nonnull
public java.lang.String getAppearanceKey(int appearance)

Get the Appearance Key for a particular Appearance.

Specified by:

getAppearanceKey in interface SignalHead

Parameters:

appearance - id for the key, e.g. SignalHead.GREEN

Returns:

the Appearance Key, e.g. "Green" or empty String if unknown. The key can be used as a Bundle String, e.g. Bundle.getMessage(getAppearanceKey(SignalHead.RED))

getAppearanceKey

@Nonnull
public java.lang.String getAppearanceKey()

Get the current Signal Head Appearance Key.

Specified by:

getAppearanceKey in interface SignalHead

Returns:

Key, or empty String if no valid appearance set.

getAppearance

public int getAppearance()

Get the Signal Head Appearance. Changes in this value can be listened to using the Appearance property.

Specified by:

getAppearance in interface SignalHead

Returns:

the appearance, e.g. SignalHead.YELLOW

isCleared

public boolean isCleared()

Determine whether this signal shows an aspect or appearance that allows travel past it, e.g. it's "been cleared". This might be a yellow or green appearance, or an Approach or Clear aspect

Specified by:

isCleared in interface Signal

Returns:

true if the signal is showing a clear indication; false otherwise

isShowingRestricting

public boolean isShowingRestricting()

Determine whether this signal shows an aspect or appearance that allows travel past it only at restricted speed. This might be a flashing red appearance, or a Restricting aspect.

Specified by:

isShowingRestricting in interface Signal

Returns:

true if the signal is showing a restricting indication; false otherwise

isAtStop

public boolean isAtStop()

Determine whether this signal shows an aspect or appearance that forbid travel past it. This might be a red appearance, or a Stop aspect. Stop-and-Proceed or Restricting would return false here.

Specified by:

isAtStop in interface Signal

Returns:

true if the signal is showing a stop indication; false otherwise

getLit

public boolean getLit()

Default behavior for "lit" parameter is to track value and return it. Get whether the signal is lit or dark. Changes to this value can be listened to using the Lit property.

Specified by:

getLit in interface Signal

Specified by:

getLit in interface SignalHead

Returns:

is lit

getHeld

public boolean getHeld()

"Held" parameter is just tracked and notified. Get whether the signal is held. Changes to this value can be listened to using the Held property. It controls what mechanisms can control the signal's appearance. The actual semantics are defined by those external mechanisms.

Specified by:

getHeld in interface Signal

Specified by:

getHeld in interface SignalHead

Returns:

is held

setState

public void setState(int s)

Implement a shorter name for setAppearance.

This generally shouldn't be used by Java code; use setAppearance instead. The is provided to make Jython script access easier to read.

Specified by:

setState in interface NamedBean

Parameters:

s - new state

getState

public int getState()

Implement a shorter name for getAppearance.

This generally shouldn't be used by Java code; use getAppearance instead. The is provided to make Jython script access easier to read.

Specified by:

getState in interface NamedBean

Returns:

current state

getDefaultValidStates

public static int[] getDefaultValidStates()

getDefaultValidStateNames

public static java.lang.String[] getDefaultValidStateNames()

getDefaultStateName

@Nonnull
public static java.lang.String getDefaultStateName(int appearance)

Get a localized text describing appearance from the corresponding state index.

Parameters:

appearance - the index of the appearance

Returns:

translated name for appearance

getValidStates

public int[] getValidStates()

Get an array of appearance indexes valid for the mast type.

Specified by:

getValidStates in interface SignalHead

Returns:

array of appearance state values available on this mast type

getValidStateKeys

public java.lang.String[] getValidStateKeys()

Get an array of non-localized appearance keys valid for the mast type. For GUI application consider using (capitalized) SignalHead.getValidStateNames()

Specified by:

getValidStateKeys in interface SignalHead

Returns:

array of translated appearance names available on this mast type

getValidStateNames

public java.lang.String[] getValidStateNames()

Get an array of localized appearance descriptions valid for the mast type. For persistance and comparison consider using SignalHead.getValidStateKeys()

Specified by:

getValidStateNames in interface SignalHead

Returns:

array of translated appearance names

isTurnoutUsed

public abstract boolean isTurnoutUsed(Turnout t)

Check if a given turnout is used on this head.

Parameters:

t - Turnout object to check

Returns:

true if turnout is configured as output or driver of head

vetoableChange

public void vetoableChange(java.beans.PropertyChangeEvent evt)
                    throws java.beans.PropertyVetoException

Specified by:

vetoableChange in interface NamedBean

Specified by:

vetoableChange in interface java.beans.VetoableChangeListener

Overrides:

vetoableChange in class AbstractNamedBean

Throws:

java.beans.PropertyVetoException

getBeanType

@Nonnull
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

Returns:

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