Package mgui.interfaces.plots.sgt

Class SgtPlotLayout<T extends SgtPlotObject<?>,​G extends gov.noaa.pmel.sgt.Graph,​A extends gov.noaa.pmel.sgt.Axis>

java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JLayeredPane
gov.noaa.pmel.sgt.JPane
mgui.interfaces.plots.sgt.SgtPlotLayout<T,​G,​A>
All Implemented Interfaces:
gov.noaa.pmel.sgt.AbstractPane, java.awt.image.ImageObserver, java.awt.MenuContainer, java.awt.print.Printable, java.beans.PropertyChangeListener, java.io.Serializable, java.util.EventListener, javax.accessibility.Accessible, javax.swing.Scrollable, AttributeListener, InterfaceObject, NamedObject, SgtPlotListener, TreeObject, CleanableObject
Direct Known Subclasses:
SgtCartesianLayout
public abstract class SgtPlotLayout<T extends SgtPlotObject<?>,​G extends gov.noaa.pmel.sgt.Graph,​A extends gov.noaa.pmel.sgt.Axis>
extends gov.noaa.pmel.sgt.JPane
implements java.beans.PropertyChangeListener, SgtPlotListener, InterfaceObject, AttributeListener
The base layout panel for an SGT plot.

The initiation process will typically call (in order):

  1. initRange to initialize this layout's range from an initial plot object
  2. initGraph to initialize this layout's graph object wrt. ranges, labels, titles, etc.
Since:
1.0
Version:
1.0
Author:
Andrew Reid
See Also:
Serialized Form

  • Nested Class Summary

    Nested Classes
    Modifier and Type Class Description
    static class  SgtPlotLayout.GraphType  

    Nested classes/interfaces inherited from class javax.swing.JLayeredPane

    javax.swing.JLayeredPane.AccessibleJLayeredPane

    Nested classes/interfaces inherited from class javax.swing.JComponent

    javax.swing.JComponent.AccessibleJComponent

    Nested classes/interfaces inherited from class java.awt.Container

    java.awt.Container.AccessibleAWTContainer

    Nested classes/interfaces inherited from class java.awt.Component

    java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

  • Field Summary

    Fields
    Modifier and Type Field Description
    protected AttributeList attributes  
    protected int auto_interval_x  
    protected int auto_interval_y  
    protected boolean auto_range_x  
    protected boolean auto_range_y  
    protected java.util.HashMap<java.lang.String,​SgtAxis<A>> axis_map  
    protected java.lang.String base_layer  
    protected java.util.HashMap<gov.noaa.pmel.sgt.dm.SGTData,​gov.noaa.pmel.sgt.Attribute> data_attributes  
    protected gov.noaa.pmel.sgt.dm.Collection data_collection  
    protected java.util.HashMap<java.lang.String,​gov.noaa.pmel.sgt.Graph> graph_map  
    protected SgtPlotLayout.GraphType graph_type  
    protected boolean is_destroyed  
    protected java.util.HashMap<java.lang.String,​gov.noaa.pmel.sgt.Layer> layers  
    protected gov.noaa.pmel.sgt.DataKey object_key  
    protected java.util.HashMap<java.lang.String,​SgtPlotObject<?>> object_map  
    protected boolean rev_axis_x  
    protected boolean rev_axis_y  
    protected java.util.ArrayList<InterfaceTreeNode> treeNodes  

    Fields inherited from class javax.swing.JLayeredPane

    DEFAULT_LAYER, DRAG_LAYER, FRAME_CONTENT_LAYER, LAYER_PROPERTY, MODAL_LAYER, PALETTE_LAYER, POPUP_LAYER

    Fields inherited from class javax.swing.JComponent

    listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

    Fields inherited from class java.awt.Component

    accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

    Fields inherited from interface gov.noaa.pmel.sgt.AbstractPane

    BOTTOM, CENTER, DEFAULT_SCALE, LEFT, MIDDLE, RIGHT, SHRINK_TO_FIT, SPECIFIED_LOCATION, TO_FIT, TOP

    Fields inherited from interface java.awt.image.ImageObserver

    ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

    Fields inherited from interface java.awt.print.Printable

    NO_SUCH_PAGE, PAGE_EXISTS

  • Constructor Summary

    Constructors
    Constructor Description
    SgtPlotLayout​(java.lang.String title, java.awt.Dimension size, SgtPlotLayout.GraphType type)  
    SgtPlotLayout​(SgtPlotLayout.GraphType graph_type)  

  • Method Summary

    Modifier and Type Method Description
    void addAttribute​(gov.noaa.pmel.sgt.dm.SGTData data, gov.noaa.pmel.sgt.Attribute attr)
    Set attributes for the given data object.
    SgtAxis<A> addAxis​(java.lang.String name, A axis, SgtPlotFunctions.AxisType type)
    Adds an axis to this plot.
    void addData​(T object)
    Add a data object to this plot, and if autoranges are set, update ranges accordingly.
    protected abstract void addGraph​(T object)
    Creates a graph for object and adds it to its own layer.
    void addLayer​(java.lang.String name, gov.noaa.pmel.sgt.Layer layer)
    Adds a layer with the specified name to this layout.
    void addMouseListener​(java.awt.event.MouseListener l)  
    void attributeUpdated​(AttributeEvent e)
    Called when an Attribute's value has been updated.
    void clean()
    Instructs this object to search its members for any object which has been destroyed, and release the pointer to it.
    void clearData()
    Removes all graph data from this layout.
    void destroy()
    Destroy this object (prepare it to be removed from memory)
    gov.noaa.pmel.sgt.Attribute getAttribute​(gov.noaa.pmel.sgt.dm.SGTData data)
    Returns the attributes for the given data object.
    gov.noaa.pmel.sgt.Attribute getAttribute​(java.lang.String name)
    Returns the attributes for the data object with the given name.
    SgtAxis<A> getAxis​(java.lang.String name)
    Returns the axis with the specified name; null if no such axis exists.
    gov.noaa.pmel.sgt.Layer getBaseLayer()
    Returns the base layer; i.e., containing axes + labels.
    protected abstract G getGraph​(java.lang.String layer)
    Returns the graph for the given layer.
    gov.noaa.pmel.sgt.Layer getLayer​(java.lang.String name)
    Returns the layer associated with the specified name.
    java.util.ArrayList<java.lang.String> getLayerNames()  
    abstract SgtAxis<gov.noaa.pmel.sgt.PlainAxis> getMainAxis​(SgtPlotFunctions.AxisType type)
    Returns the main axis of the given SgtPlotFunctions.AxisType.
    java.util.ArrayList<java.lang.String> getMapKeys()  
    gov.noaa.pmel.sgt.Graph getPlot()  
    java.lang.String getTreeLabel()
    Returns the label text to appear in a tree node.
    protected abstract G initPlot​(T object)
    Initiates the plot using the given initial data object.
    protected abstract void initRange​(T object)
    Initiates this plot's range based upon its first data object.
    boolean isDestroyed()
    Test whether this object has been destroyed
    InterfaceTreeNode issueTreeNode()
    Issues a new InterfaceTreeNode for this object.
    void plotObjectAdded​(SgtPlotEvent e)
    Updates this plot in response to an additional data object.
    void plotObjectModified​(SgtPlotEvent e)
    Updates this plot in response to the modification of a data object.
    void plotObjectRemoved​(SgtPlotEvent e)
    Updates this plot in response to the removal of a data object.
    void propertyChange​(java.beans.PropertyChangeEvent evt)  
    void removeAxis​(java.lang.String name)
    Removes the axis with the specified name from this layout.
    void removeLayer​(java.lang.String name)
    Removes the layer corresponding the the specified name from this layout.
    void setTreeNode​(InterfaceTreeNode node)
    Sets the children for this node's InterfaceTreeNode.
    protected abstract void updateRange​(T object)
    Updates this plot's range based upon an added data object.

    Methods inherited from class gov.noaa.pmel.sgt.JPane

    add, add, add, add, add, addPropertyChangeListener, draw, draw, draw, drawPage, drawPage, getComponent, getFirstLayer, getId, getLayerFromDataId, getMaximumSize, getMinimumSize, getObjectAt, getObjectsAt, getObjectsAt, getPageHAlign, getPageOrigin, getPageScaleMode, getPageSize, getPageVAlign, getPreferredScrollableViewportSize, getPreferredSize, getScrollableBlockIncrement, getScrollableTracksViewportHeight, getScrollableTracksViewportWidth, getScrollableUnitIncrement, getSelectedObject, getStrokeDrawer, getVersion, getZoomBounds, getZoomStart, init, isBatch, isModified, isMouseEventsEnabled, isPrinter, moveLayerDown, moveLayerDown, moveLayerUp, moveLayerUp, paintComponent, print, processMouseEvent, processMouseMotionEvent, removePropertyChangeListener, setBatch, setBatch, setId, setModified, setMouseEventsEnabled, setPageAlign, setPageHAlign, setPageOrigin, setPageScaleMode, setPageVAlign, setScrollableBlockIncrement, setScrollableUnitIncrement, setSelectedObject, setSize, toString

    Methods inherited from class javax.swing.JLayeredPane

    addImpl, getAccessibleContext, getComponentCountInLayer, getComponentsInLayer, getComponentToLayer, getIndexOf, getLayer, getLayer, getLayeredPaneAbove, getObjectForLayer, getPosition, highestLayer, insertIndexForLayer, isOptimizedDrawingEnabled, lowestLayer, moveToBack, moveToFront, paint, paramString, putLayer, remove, removeAll, setLayer, setLayer, setPosition

    Methods inherited from class javax.swing.JComponent

    addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getNextFocusableComponent, getPopupLocation, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getUI, getUIClassID, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paintBorder, paintChildren, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update, updateUI

    Methods inherited from class java.awt.Container

    addContainerListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

    Methods inherited from class java.awt.Component

    action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, show, show, size, transferFocus, transferFocusBackward, transferFocusUpCycle

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface gov.noaa.pmel.sgt.AbstractPane

    getBounds

    Methods inherited from interface mgui.interfaces.NamedObject

    getName, setName

  • Field Details

    • is_destroyed

      protected boolean is_destroyed

    • treeNodes

      protected java.util.ArrayList<InterfaceTreeNode> treeNodes

    • object_key

      protected gov.noaa.pmel.sgt.DataKey object_key

    • graph_type

      protected SgtPlotLayout.GraphType graph_type

    • layers

      protected java.util.HashMap<java.lang.String,​gov.noaa.pmel.sgt.Layer> layers

    • data_attributes

      protected java.util.HashMap<gov.noaa.pmel.sgt.dm.SGTData,​gov.noaa.pmel.sgt.Attribute> data_attributes

    • graph_map

      protected java.util.HashMap<java.lang.String,​gov.noaa.pmel.sgt.Graph> graph_map

    • object_map

      protected java.util.HashMap<java.lang.String,​SgtPlotObject<?>> object_map

    • axis_map

      protected java.util.HashMap<java.lang.String,​SgtAxis<A extends gov.noaa.pmel.sgt.Axis>> axis_map

    • data_collection

      protected gov.noaa.pmel.sgt.dm.Collection data_collection

    • auto_range_x

      protected boolean auto_range_x

    • auto_range_y

      protected boolean auto_range_y

    • auto_interval_x

      protected int auto_interval_x

    • auto_interval_y

      protected int auto_interval_y

    • rev_axis_x

      protected boolean rev_axis_x

    • rev_axis_y

      protected boolean rev_axis_y

    • attributes

      protected AttributeList attributes

    • base_layer

      protected java.lang.String base_layer

  • Constructor Details

  • Method Details

    • clean

      public void clean()
      Description copied from interface: CleanableObject
      Instructs this object to search its members for any object which has been destroyed, and release the pointer to it.
      Specified by:
      clean in interface CleanableObject

    • getPlot

      public gov.noaa.pmel.sgt.Graph getPlot()

    • getLayerNames

      public java.util.ArrayList<java.lang.String> getLayerNames()

    • getLayer

      public gov.noaa.pmel.sgt.Layer getLayer​(java.lang.String name)
      Returns the layer associated with the specified name.
      Specified by:
      getLayer in interface gov.noaa.pmel.sgt.AbstractPane
      Overrides:
      getLayer in class gov.noaa.pmel.sgt.JPane
      Parameters:
      name -
      Returns:

    • getBaseLayer

      public gov.noaa.pmel.sgt.Layer getBaseLayer()
      Returns the base layer; i.e., containing axes + labels.
      Returns:

    • addLayer

      public void addLayer​(java.lang.String name, gov.noaa.pmel.sgt.Layer layer) throws PlotException
      Adds a layer with the specified name to this layout.
      Parameters:
      name -
      layer -
      Throws:
      PlotException

    • removeLayer

      public void removeLayer​(java.lang.String name)
      Removes the layer corresponding the the specified name from this layout.
      Parameters:
      name -

    • addAxis

      public SgtAxis<A> addAxis​(java.lang.String name, A axis, SgtPlotFunctions.AxisType type) throws PlotException
      Adds an axis to this plot.
      Parameters:
      name -
      axis -
      Returns:
      the created SgtAxis
      Throws:
      PlotException

    • removeAxis

      public void removeAxis​(java.lang.String name)
      Removes the axis with the specified name from this layout.
      Parameters:
      name -

    • getAxis

      public SgtAxis<A> getAxis​(java.lang.String name)
      Returns the axis with the specified name; null if no such axis exists.
      Parameters:
      name -
      Returns:

    • getMainAxis

      public abstract SgtAxis<gov.noaa.pmel.sgt.PlainAxis> getMainAxis​(SgtPlotFunctions.AxisType type)
      Returns the main axis of the given SgtPlotFunctions.AxisType.
      Parameters:
      type -
      Returns:

    • attributeUpdated

      public void attributeUpdated​(AttributeEvent e)
      Description copied from interface: AttributeListener
      Called when an Attribute's value has been updated.
      Specified by:
      attributeUpdated in interface AttributeListener

    • propertyChange

      public void propertyChange​(java.beans.PropertyChangeEvent evt)
      Specified by:
      propertyChange in interface java.beans.PropertyChangeListener

    • getMapKeys

      public java.util.ArrayList<java.lang.String> getMapKeys()

    • addData

      public void addData​(T object) throws PlotException
      Add a data object to this plot, and if autoranges are set, update ranges accordingly.

      If this is the first data object, X and Y axes and transforms are created and added to the graph; for all additional objects, the transforms will be linked from the first object layer, and no axes will be created.

      Parameters:
      xy_data -
      Throws:
      PlotException - If data's ID already exists. Existing data object must be removed first.

    • clearData

      public void clearData()
      Removes all graph data from this layout.

    • plotObjectAdded

      public void plotObjectAdded​(SgtPlotEvent e)
      Description copied from interface: SgtPlotListener
      Updates this plot in response to an additional data object.
      Specified by:
      plotObjectAdded in interface SgtPlotListener

    • plotObjectModified

      public void plotObjectModified​(SgtPlotEvent e)
      Description copied from interface: SgtPlotListener
      Updates this plot in response to the modification of a data object.
      Specified by:
      plotObjectModified in interface SgtPlotListener

    • plotObjectRemoved

      public void plotObjectRemoved​(SgtPlotEvent e)
      Description copied from interface: SgtPlotListener
      Updates this plot in response to the removal of a data object.
      Specified by:
      plotObjectRemoved in interface SgtPlotListener

    • initRange

      protected abstract void initRange​(T object)
      Initiates this plot's range based upon its first data object.
      Parameters:
      object -

    • updateRange

      protected abstract void updateRange​(T object)
      Updates this plot's range based upon an added data object.
      Parameters:
      object -

    • getGraph

      protected abstract G getGraph​(java.lang.String layer)
      Returns the graph for the given layer.
      Parameters:
      layer -
      Returns:

    • addGraph

      protected abstract void addGraph​(T object) throws PlotException
      Creates a graph for object and adds it to its own layer.
      Parameters:
      object -
      Throws:
      PlotException

    • initPlot

      protected abstract G initPlot​(T object) throws PlotException
      Initiates the plot using the given initial data object. This function should set up axes, transforms, and ranges for the graph object.
      Parameters:
      layer -
      attributes - attributes for the plot
      Returns:
      the graph created for this object
      Throws:
      PlotException

    • addAttribute

      public void addAttribute​(gov.noaa.pmel.sgt.dm.SGTData data, gov.noaa.pmel.sgt.Attribute attr)
      Set attributes for the given data object.
      Parameters:
      data -
      attr -

    • getAttribute

      public gov.noaa.pmel.sgt.Attribute getAttribute​(gov.noaa.pmel.sgt.dm.SGTData data) throws gov.noaa.pmel.sgt.DataNotFoundException
      Returns the attributes for the given data object.
      Parameters:
      data -
      Returns:
      Throws:
      gov.noaa.pmel.sgt.DataNotFoundException

    • getAttribute

      public gov.noaa.pmel.sgt.Attribute getAttribute​(java.lang.String name) throws gov.noaa.pmel.sgt.DataNotFoundException
      Returns the attributes for the data object with the given name.
      Parameters:
      xy_data -
      Returns:
      Throws:
      gov.noaa.pmel.sgt.DataNotFoundException

    • addMouseListener

      public void addMouseListener​(java.awt.event.MouseListener l)
      Overrides:
      addMouseListener in class java.awt.Component

    • getTreeLabel

      public java.lang.String getTreeLabel()
      Description copied from interface: TreeObject
      Returns the label text to appear in a tree node.
      Specified by:
      getTreeLabel in interface TreeObject
      Returns:

    • issueTreeNode

      public InterfaceTreeNode issueTreeNode()
      Description copied from interface: TreeObject
      Issues a new InterfaceTreeNode for this object. The object is responsible for maintaining, updating, and destroying the tree nodes it issues, or notifying containers -- i.e., parent trees -- of changes which require the tree nodes to be modified or destroyed.
      Specified by:
      issueTreeNode in interface TreeObject
      Returns:

    • setTreeNode

      public void setTreeNode​(InterfaceTreeNode node)
      Description copied from interface: TreeObject
      Sets the children for this node's InterfaceTreeNode.
      Specified by:
      setTreeNode in interface TreeObject

    • destroy

      public void destroy()
      Description copied from interface: InterfaceObject
      Destroy this object (prepare it to be removed from memory)
      Specified by:
      destroy in interface InterfaceObject

    • isDestroyed

      public boolean isDestroyed()
      Description copied from interface: InterfaceObject
      Test whether this object has been destroyed
      Specified by:
      isDestroyed in interface InterfaceObject
      Returns: