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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK Reference 11g Release 1 (11.1.1.5.0) E13403-06 |
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public interface Element
The Element
interface defines the protocol used by the IDE to communicate with data objects in order to display the objects in the UI. For example, objects that need to be shown in an ExplorerWindow
will need to implement the Element
interface.
Method Summary | |
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Attributes |
getAttributes() This method returns an Attributes object that encodes the attributes of the Element . |
java.util.Iterator<Element> |
getChildren() This method is part of the Element interface to provide a convenient way of getting an Iterator over any contained child Element s without having to test the object's type with the instanceof operator or having to downcast to a more specific type. |
java.lang.Object |
getData() Returns the data object associated with this Element . |
boolean |
mayHaveChildren() This method is part of the Element interface to provide a convenient way of determining whether an object may have children without having to test the object's type with the instanceof operator or having to downcast to a more specific type. |
Methods inherited from interface oracle.ide.model.Displayable |
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getIcon, getLongLabel, getShortLabel, getToolTipText, toString |
Method Detail |
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boolean mayHaveChildren()
Element
interface to provide a convenient way of determining whether an object may have children without having to test the object's type with the instanceof
operator or having to downcast to a more specific type.
An implementation of Element
that represents a leaf in a tree structure should return false
from this method. An implementation of Element
that could represent a non-leaf in a tree structure should return true
from this method, even if it does not currently contain any children.
true
if this Element
may contain child Element
s.java.util.Iterator<Element> getChildren()
Element
interface to provide a convenient way of getting an Iterator
over any contained child Element
s without having to test the object's type with the instanceof
operator or having to downcast to a more specific type.
An implementation of Element
that represents a leaf in a tree structure should return null
from this method. An implementation of Element
that could represent a non-leaf in a tree structure should return either an Iterator
over the child Element
s or null
if there are no children.
Iterator
over any child Element
s contained by this Element
. If there are no children, null
is returned.Attributes getAttributes()
Attributes
object that encodes the attributes of the Element
. Changing the attribute settings on the return object changes the element attributes. Subclasses should use their super class attributes object to define their own attributes. This allows subclasses to inherit their super class attributes. If a subclass does not wish to inherit attributes, they should first call getAttributes().clear()
and define new attributes.java.lang.Object getData()
Element
. Implementations will often simply return this
, since the Element is often its own data object. If the implementation returns an object other than this
, be sure to set ElementAttributes.DECORATES_DATA_ELEMENT
.Element
instance.
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Oracle Fusion Middleware Java API Reference for Oracle Extension SDK Reference 11g Release 1 (11.1.1.5.0) E13403-06 |
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