org.apache.xalan.templates
Class AVTPartXPath

java.lang.Object
  org.apache.xalan.templates.AVTPart
      org.apache.xalan.templates.AVTPartXPath

All Implemented Interfaces:

Serializable, XSLTVisitable

public class AVTPartXPath

extends AVTPart

Simple string part of a complex AVT.

See Also:

Serialized Form

Field Summary

private XPath

m_xpath The XPath object contained in this part.

Constructor Summary

AVTPartXPath(String val, PrefixResolver nsNode, XPathParser xpathProcessor, XPathFactory factory, XPathContext liaison)
Construct a simple AVT part.

AVTPartXPath(XPath xpath)
Construct a simple AVT part.

Method Summary

void	callVisitors(XSLTVisitor visitor) This will traverse the heararchy, calling the visitor for each member.
boolean	canTraverseOutsideSubtree() Tell if this expression or it's subexpressions can traverse outside the current subtree.
void	evaluate(XPathContext xctxt, FastStringBuffer buf, int context, PrefixResolver nsNode) Write the value into the buffer.
void	fixupVariables(Vector vars, int globalsSize) This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
String	getSimpleString() Get the AVT part as the original string.

Methods inherited from class org.apache.xalan.templates.AVTPart

setXPathSupport

Methods inherited from class java.lang.Object

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

Field Detail

m_xpath

private XPath m_xpath

The XPath object contained in this part.

Constructor Detail

AVTPartXPath

public AVTPartXPath(XPath xpath)

Construct a simple AVT part.

Parameters:

xpath - Xpath section of AVT

AVTPartXPath

public AVTPartXPath(String val,
                    PrefixResolver nsNode,
                    XPathParser xpathProcessor,
                    XPathFactory factory,
                    XPathContext liaison)
             throws javax.xml.transform.TransformerException

Construct a simple AVT part.

Parameters:

val - A pure string section of an AVT.

nsNode - An object which can be used to determine the Namespace Name (URI) for any Namespace prefix used in the XPath. Usually this is based on the context where the XPath was specified, such as a node within a Stylesheet.

xpathProcessor - XPath parser

factory - XPath factory

liaison - An XPathContext object, providing infomation specific to this invocation and this thread. Maintains SAX output state, variables, error handler and so on, so the transformation/XPath object itself can be simultaneously invoked from multiple threads.

Throws:

javax.xml.transform.TransformerException - TODO: Fix or remove this unused c'tor.

Method Detail

fixupVariables

public void fixupVariables(Vector vars,
                           int globalsSize)

This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.

Specified by:

fixupVariables in class AVTPart

Parameters:

vars - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame).

canTraverseOutsideSubtree

public boolean canTraverseOutsideSubtree()

Tell if this expression or it's subexpressions can traverse outside the current subtree.

Overrides:

canTraverseOutsideSubtree in class AVTPart

Returns:

true if traversal outside the context node's subtree can occur.

getSimpleString

public String getSimpleString()

Get the AVT part as the original string.

Specified by:

getSimpleString in class AVTPart

Returns:

the AVT part as the original string.

evaluate

public void evaluate(XPathContext xctxt,
                     FastStringBuffer buf,
                     int context,
                     PrefixResolver nsNode)
              throws javax.xml.transform.TransformerException

Write the value into the buffer.

Specified by:

evaluate in class AVTPart

Parameters:

xctxt - An XPathContext object, providing infomation specific to this invocation and this thread. Maintains SAX state, variables, error handler and so on, so the transformation/XPath object itself can be simultaneously invoked from multiple threads.

buf - Buffer to write into.

context - The current source tree context.

nsNode - The current namespace context (stylesheet tree context).

Throws:

javax.xml.transform.TransformerException

callVisitors

public void callVisitors(XSLTVisitor visitor)

Description copied from interface: XSLTVisitable

This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.

Parameters:

visitor - The visitor whose appropriate method will be called.

See Also:

XSLTVisitable.callVisitors(XSLTVisitor)