org.apache.xalan.templates
Class AVTPart

java.lang.Object
  |
  +--org.apache.xalan.templates.AVTPart
Direct Known Subclasses:
AVTPartSimple, AVTPartXPath

public abstract class AVTPart
extends java.lang.Object
implements java.io.Serializable, XSLTVisitable

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

See Also:
Serialized Form
Usage:
**For internal use only**

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(java.util.Vector vars, int globalsSize)
          This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
abstract  java.lang.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
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AVTPart

public AVTPart()
Construct a part.
Method Detail

getSimpleString

public abstract java.lang.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 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:
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(java.util.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).


Copyright 2006 Apache XML Project. All Rights Reserved.