javax.swing.text.html
Class ObjectView

java.lang.Object
  javax.swing.text.View
      javax.swing.text.ComponentView
          javax.swing.text.html.ObjectView

All Implemented Interfaces:

SwingConstants

public class ObjectView

extends ComponentView

Component decorator that implements the view interface for <object> elements.

This view will try to load the class specified by the classid attribute. If possible, the Classloader used to load the associated Document is used. This would typically be the same as the ClassLoader used to load the EditorKit. If the documents ClassLoader is null, Class.forName is used.

If the class can successfully be loaded, an attempt will be made to create an instance of it by calling Class.newInstance. An attempt will be made to narrow the instance to type java.awt.Component to display the object.

This view can also manage a set of parameters with limitations. The parameters to the <object> element are expected to be present on the associated elements attribute set as simple strings. Each bean property will be queried as a key on the AttributeSet, with the expectation that a non-null value (of type String) will be present if there was a parameter specification for the property. Reflection is used to set the parameter. Currently, this is limited to a very simple single parameter of type String.

A simple example html invocation is:

Author:

Timothy Prinzing

Nested Class Summary

Nested classes inherited from class javax.swing.text.ComponentView

Field Summary

Fields inherited from class javax.swing.text.ComponentView

Fields inherited from class javax.swing.text.View

BadBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, GoodBreakWeight, X_AXIS, Y_AXIS

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Constructor Summary

ObjectView(Element elem)
Creates a new ObjectView object.

Method Summary

protected Component	createComponent() Create the component.
private Class	getClass(String classname) Get a Class object to use for loading the classid.
(package private) Component	getUnloadableRepresentation() Fetch a component that can be used to represent the object if it can't be created.
private void	setParameters(Component comp, AttributeSet attr) Initialize this component according the KEY/VALUEs passed in via the <param> elements in the corresponding <object> element.

Methods inherited from class javax.swing.text.ComponentView

getAlignment, getComponent, getMaximumSpan, getMinimumSpan, getPreferredSpan, modelToView, paint, setParent, viewToModel

Methods inherited from class javax.swing.text.View

append, breakView, changedUpdate, createFragment, forwardUpdate, forwardUpdateToView, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getGraphics, getNextVisualPositionFrom, getParent, getResizeWeight, getStartOffset, getToolTipText, getView, getViewCount, getViewFactory, getViewIndex, getViewIndex, insert, insertUpdate, isVisible, modelToView, modelToView, preferenceChanged, remove, removeAll, removeUpdate, replace, setSize, updateChildren, updateLayout, viewToModel

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectView

public ObjectView(Element elem)

Creates a new ObjectView object.

Parameters:

elem - the element to decorate

Method Detail

createComponent

protected Component createComponent()

Create the component. The classid is used as a specification of the classname, which we try to load.

Overrides:

createComponent in class ComponentView

getUnloadableRepresentation

Component getUnloadableRepresentation()

Fetch a component that can be used to represent the object if it can't be created.

getClass

private Class getClass(String classname)
                throws ClassNotFoundException

Get a Class object to use for loading the classid. If possible, the Classloader used to load the associated Document is used. This would typically be the same as the ClassLoader used to load the EditorKit. If the documents ClassLoader is null, Class.forName is used.

Throws:

ClassNotFoundException

setParameters

private void setParameters(Component comp,
                           AttributeSet attr)

Initialize this component according the KEY/VALUEs passed in via the <param> elements in the corresponding <object> element.