org.apache.xalan.templates
Class AVTPart

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

All Implemented Interfaces:

Serializable, XSLTVisitable

Direct Known Subclasses:

AVTPartSimple, AVTPartXPath

public abstract class AVTPart

extends Object

implements Serializable, XSLTVisitable

Class to hold a part, either a string or XPath, of an Attribute Value Template.

See Also:

Serialized Form

Constructor Summary

AVTPart()
Construct a part.

Method Summary

boolean	canTraverseOutsideSubtree() Tell if this expression or it's subexpressions can traverse outside the current subtree.
abstract void	evaluate(XPathContext xctxt, FastStringBuffer buf, int context, PrefixResolver nsNode) Write the evaluated value into the given string buffer.
abstract void	fixupVariables(Vector vars, int globalsSize) This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
abstract String	getSimpleString() Get the AVT part as the original string.
void	setXPathSupport(XPathContext support) Set the XPath support.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.xalan.templates.XSLTVisitable

callVisitors

Constructor Detail

AVTPart

public AVTPart()

Construct a part.

Method Detail

getSimpleString

public abstract String getSimpleString()

Get the AVT part as the original string.

Returns:

the AVT part as the original string.

evaluate

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

Write the evaluated value into the given string buffer.

Parameters:

xctxt - The XPath context to use to evaluate this AVT.

buf - Buffer to write into.

context - The current source tree context.

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

Throws:

javax.xml.transform.TransformerException

setXPathSupport

public void setXPathSupport(XPathContext support)

Set the XPath support.

Parameters:

support - XPathContext to set.

canTraverseOutsideSubtree

public boolean canTraverseOutsideSubtree()

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

Returns:

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

fixupVariables

public abstract void fixupVariables(Vector vars,
                                    int globalsSize)

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

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).