org.apache.xpath

Class XPathContext.XPathExpressionContext

public class XPathContext.XPathExpressionContext extends Object implements ExpressionContext

Method Summary
Node	getContextNode() Get the current context node.
NodeIterator	getContextNodes() Get the current context node list.
DTMManager	getDTMManager() Return the DTMManager object.
ErrorListener	getErrorListener() Get the error listener.
XObject	getVariableOrParam(QName qname) Get a variable based on it's qualified name.
XPathContext	getXPathContext() Return the XPathContext associated with this XPathExpressionContext.
double	toNumber(Node n) Get the value of a node as a number.
String	toString(Node n) Get the value of a node as a string.

Method Detail

getContextNode

public Node getContextNode()

Get the current context node.

Returns: The current context node.

getContextNodes

public NodeIterator getContextNodes()

Get the current context node list.

Returns: An iterator for the current context list, as defined in XSLT.

Return the DTMManager object. Though XPathContext context extends the DTMManager, it really is a proxy for the real DTMManager. If a caller needs to make a lot of calls to the DTMManager, it is faster if it gets the real one from this function.

getErrorListener

public ErrorListener getErrorListener()

Get the error listener.

Returns: The registered error listener.

getVariableOrParam

public final XObject getVariableOrParam(QName qname)

Get a variable based on it's qualified name.

Parameters: qname The qualified name of the variable.

Returns: The evaluated value of the variable.

Throws: javax.xml.transform.TransformerException

getXPathContext

public XPathContext getXPathContext()

Return the XPathContext associated with this XPathExpressionContext. Extensions should use this judiciously and only when special processing requirements cannot be met another way. Consider requesting an enhancement to the ExpressionContext interface to avoid having to call this method.

Returns: the XPathContext associated with this XPathExpressionContext.

toNumber

public double toNumber(Node n)

Get the value of a node as a number.

Parameters: n Node to be converted to a number. May be null.

Returns: value of n as a number.

toString

public String toString(Node n)

Get the value of a node as a string.

Parameters: n Node to be converted to a string. May be null.

Returns: value of n as a string, or an empty string if n is null.