com.openharbor.xmlj.observer
Class ObservableElement

java.lang.Object
  com.openharbor.xmlj.Element
      com.openharbor.xmlj.observer.ObservableElement

public class ObservableElement

extends Element

An element whose changes can be observed by another object. The observer might be a 'wrapper' proxy that provides a more meaningful view of Element information. For example, such a proxy could implement the java.util.Map interface as a proxy for an Element, with Map.Entry objects that are proxies for its subElements. The Map would need to observe changes to the list of subElements, in order to maintain its index (e.g. hash table) and enforce the Map invariant that no two entries have the same key.

Nested Class Summary

protected static class	ObservableElement.ObservableList
protected static class	ObservableElement.ObservableMap
static interface	ObservableElement.Observer

Nested classes inherited from class com.openharbor.xmlj.Element

Element.AttributeMap, Element.ElementList

Field Summary

Fields inherited from class com.openharbor.xmlj.Element

EMPTY_VALUE

Constructor Summary

ObservableElement()

Method Summary

ObservableElement.Observer	getObserver()
protected Element.AttributeMap	newAttributeMap(java.util.Map real) Override this to customize the implementation of the attributes' Map.
protected Element.ElementList	newElementList() Override this to customize the implementation of the subElements' List.
void	setObserver(ObservableElement.Observer observer)
void	setValue(java.lang.String value) Set the text contained in this element.

Methods inherited from class com.openharbor.xmlj.Element

getAttributes, getName, getParent, getSubElements, getValue, setName

Methods inherited from class java.lang.Object

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

Constructor Detail

ObservableElement

public ObservableElement()

Method Detail

getObserver

public ObservableElement.Observer getObserver()

setObserver

public void setObserver(ObservableElement.Observer observer)

setValue

public void setValue(java.lang.String value)

Description copied from class: Element

Set the text contained in this element. setValue(null) sets the text to EMPTY_VALUE. This prevents the creation of Java structures that can't be represented in XML.

Overrides:

setValue in class Element

newAttributeMap

protected Element.AttributeMap newAttributeMap(java.util.Map real)

Description copied from class: Element

Override this to customize the implementation of the attributes' Map.

Overrides:

newAttributeMap in class Element

newElementList

protected Element.ElementList newElementList()

Description copied from class: Element

Override this to customize the implementation of the subElements' List.

Overrides:

newElementList in class Element