com.webmethods.caf.faces.data.tree.object
Class BaseXMLNode

java.lang.Object
  com.webmethods.caf.faces.data.tree.object.BaseXMLNode

All Implemented Interfaces:

IContentProvider, INode

Direct Known Subclasses:

XMLDOMNode2, XMLElementNode2

public abstract class BaseXMLNode
extends Object
implements INode, IContentProvider

Base class for adapting a W3C DOM Node to a CAF tree INode and CAF data IContentProvider (as a IContentProvider, binding-expression access to the node's properties can be optimized).

Field Summary

protected List	m_children Lazily created by INode.getChildren().
protected String	m_id Lazily created by INode.getId().
protected INode	m_parent Null if root.
protected CachedXPathAPI	m_xpathAPI Lazily created by BaseXMLNode.getXPathAPI().
protected Map	m_xpathCache Lazily created cache of xpaths to evaluated results.

Constructor Summary

BaseXMLNode()

Method Summary

Object	getData() Row data.
INode	getParent() Node parent, or null for root.
Object[]	getPropertyKeys() Returns list of properties supported by this content provider.
Class	getType(Object propertyKey) Returns java type of the given property
Object	getValue(Object propertyKey) Returns value of the given property
protected abstract Node	getXMLNode() Wrapped DOM node.
protected CachedXPathAPI	getXPathAPI() Xalan xpath api context.
protected Object	getXPathValue(String xpath) Evaluates the specified xpath for the wrapped dom node.
boolean	hasProperty(Object propertyKey) Checks if the given property is supported by this content provider

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.webmethods.caf.faces.data.tree.INode

getChildren, getId

Methods inherited from interface com.webmethods.caf.faces.data.IContentProvider

toString

Field Detail

m_xpathAPI

protected CachedXPathAPI m_xpathAPI

Lazily created by BaseXMLNode.getXPathAPI().

m_xpathCache

protected Map m_xpathCache

Lazily created cache of xpaths to evaluated results.

m_id

protected String m_id

Lazily created by INode.getId().

m_parent

protected INode m_parent

Null if root.

m_children

protected List m_children

Lazily created by INode.getChildren().

Constructor Detail

BaseXMLNode

public BaseXMLNode()

Method Detail

getData

public Object getData()

Description copied from interface: INode

Row data.

Specified by:

getData in interface INode

getParent

public INode getParent()

Description copied from interface: INode

Node parent, or null for root.

Specified by:

getParent in interface INode

getPropertyKeys

public Object[] getPropertyKeys()

Description copied from interface: IContentProvider

Returns list of properties supported by this content provider. Can return Object[0], never null.

Specified by:

getPropertyKeys in interface IContentProvider

Returns:

array of property keys which is typically of type String or Integer

getType

public Class getType(Object propertyKey)
              throws PropertyNotFoundException

Description copied from interface: IContentProvider

Returns java type of the given property

Specified by:

getType in interface IContentProvider

Parameters:

propertyKey - the property key of type String or Integer

Returns:

property java Class

Throws:

PropertyNotFoundException - if property is not supported

getValue

public Object getValue(Object propertyKey)
                throws EvaluationException,
                       PropertyNotFoundException

Description copied from interface: IContentProvider

Returns value of the given property

Specified by:

getValue in interface IContentProvider

Parameters:

propertyKey - the property key of type String or Integer

Returns:

value of the property, can be null

Throws:

EvaluationException - if error during property evaluation

PropertyNotFoundException - if property is not supported

hasProperty

public boolean hasProperty(Object propertyKey)

Description copied from interface: IContentProvider

Checks if the given property is supported by this content provider

Specified by:

hasProperty in interface IContentProvider

Parameters:

propertyKey - property key of type String or Integer

Returns:

true if property is supported

getXMLNode

protected abstract Node getXMLNode()

Wrapped DOM node.

getXPathAPI

protected CachedXPathAPI getXPathAPI()

Xalan xpath api context.

getXPathValue

protected Object getXPathValue(String xpath)
                        throws TransformerException

Evaluates the specified xpath for the wrapped dom node.

Throws:

TransformerException