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Xalan-Java 2: Class VariableStack
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org.apache.xpath</FONT>
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Class VariableStack</H2>
<PRE>
java.lang.Object
|
+--java.util.AbstractCollection
|
+--java.util.AbstractList
|
+--java.util.Vector
|
+--java.util.Stack
|
+--<B>org.apache.xpath.VariableStack</B>
</PRE>
<HR>
<DL>
<DT>public class <B>VariableStack</B><DT>extends java.util.Stack</DL>
<P>
<i><font size="-1" color="#FF0000">**For internal use only** </font></i><meta name="usage" content="internal"/>
Defines a class to keep track of a stack for
template arguments and variables. The VariableStack extends
Stack, and each element in the stack is a stack frame, i.e. a
Stack itself. The zero element is the global stack frame.
Note: Someone recently made the suggestion that the
globals should not be kept at the bottom of the stack,
but should be implemented in a hash table.
<P>
<DL>
<DT><B>See Also: </B><DD><A HREF="../../../serialized-form.html#org.apache.xpath.VariableStack">Serialized Form</A></DL>
<HR>
<P>
<!-- ======== INNER CLASS SUMMARY ======== -->
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</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#VariableStack()">VariableStack</A></B>()</CODE>
<BR>
Constructor for a variable stack.</TD>
</TR>
</TABLE>
<!-- ========== METHOD SUMMARY =========== -->
<A NAME="method_summary"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
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<B>Method Summary</B></FONT></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#getContextPos()">getContextPos</A></B>()</CODE>
<BR>
Get the current context position.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/xpath/Arg.html">Arg</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#getDeclaredVariable(org.apache.xml.utils.QName)">getDeclaredVariable</A></B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname)</CODE>
<BR>
Returns a variable or parameter that is already declared,
either in the current context or in the global space.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/xpath/Arg.html">Arg</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#getParamArg(org.apache.xml.utils.QName)">getParamArg</A></B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname)</CODE>
<BR>
Get the variable argument.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#getSearchStart()">getSearchStart</A></B>()</CODE>
<BR>
Get the position to start the search, or -1
if the search should start from the top.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#getSearchStartOrTop()">getSearchStartOrTop</A></B>()</CODE>
<BR>
Get the position from where the search should start,
which is either the searchStart property, or the top
of the stack if that value is -1.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/xpath/objects/XObject.html">XObject</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#getVariable(org.apache.xpath.XPathContext, org.apache.xml.utils.QName)">getVariable</A></B>(<A HREF="../../../org/apache/xpath/XPathContext.html">XPathContext</A> xctxt,
<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> name)</CODE>
<BR>
Given a name, return an object representing
the value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#markGlobalStackFrame()">markGlobalStackFrame</A></B>()</CODE>
<BR>
Mark the top of the global stack frame.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#popContextPosition()">popContextPosition</A></B>()</CODE>
<BR>
Pop the current context position onto the contextPositions.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#popCurrentContext()">popCurrentContext</A></B>()</CODE>
<BR>
Pop the current context from the current context stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#popElemFrame()">popElemFrame</A></B>()</CODE>
<BR>
Pop the current context from the current context stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#pushContextMarker()">pushContextMarker</A></B>()</CODE>
<BR>
Push the current top of the stack as
a context marker into the variables stack to let us know when
to stop searching for a var.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#pushContextPosition(int)">pushContextPosition</A></B>(int pos)</CODE>
<BR>
Push a context marker onto the contextPositions stack to let us know when
to stop searching for a var.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#pushElemFrame()">pushElemFrame</A></B>()</CODE>
<BR>
Push an argument onto the stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#pushOrReplaceParameter(org.apache.xml.utils.QName, org.apache.xpath.objects.XObject)">pushOrReplaceParameter</A></B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname,
<A HREF="../../../org/apache/xpath/objects/XObject.html">XObject</A> xval)</CODE>
<BR>
Push a parameter onto the stack, or replace it
if it already exists.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#pushVariable(org.apache.xml.utils.QName, org.apache.xpath.objects.XObject)">pushVariable</A></B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname,
<A HREF="../../../org/apache/xpath/objects/XObject.html">XObject</A> val)</CODE>
<BR>
Push an argument onto the stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#pushVariableArg(org.apache.xpath.Arg)">pushVariableArg</A></B>(<A HREF="../../../org/apache/xpath/Arg.html">Arg</A> arg)</CODE>
<BR>
Push an argument onto the stack.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#remarkParams()">remarkParams</A></B>()</CODE>
<BR>
Re-mark the variables in the current frame as all
being parameters.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/VariableStack.html#setSearchStart(int)">setSearchStart</A></B>(int startPos)</CODE>
<BR>
Set where to start the current search for a variable.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.util.Stack"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.util.Stack</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>empty,
peek,
pop,
push,
search</CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.util.Vector"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.util.Vector</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>add,
add,
addAll,
addAll,
addElement,
capacity,
clear,
clone,
contains,
containsAll,
copyInto,
elementAt,
elements,
ensureCapacity,
equals,
firstElement,
get,
hashCode,
indexOf,
indexOf,
insertElementAt,
isEmpty,
lastElement,
lastIndexOf,
lastIndexOf,
remove,
remove,
removeAll,
removeAllElements,
removeElement,
removeElementAt,
retainAll,
set,
setElementAt,
setSize,
size,
subList,
toArray,
toArray,
toString,
trimToSize</CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.util.AbstractList"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.util.AbstractList</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>iterator,
listIterator,
listIterator</CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.lang.Object</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>getClass,
notify,
notifyAll,
wait,
wait,
wait</CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="VariableStack()"><!-- --></A><H3>
VariableStack</H3>
<PRE>
public <B>VariableStack</B>()</PRE>
<DL>
<DD>Constructor for a variable stack.</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="setSearchStart(int)"><!-- --></A><H3>
setSearchStart</H3>
<PRE>
public void <B>setSearchStart</B>(int startPos)</PRE>
<DL>
<DD>Set where to start the current search for a variable.
If this is -1, the search should start at the top
of the stack.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>startPos</CODE> - The position to start the search, or -1
if the search should start from the top.</DL>
</DD>
</DL>
<HR>
<A NAME="getSearchStartOrTop()"><!-- --></A><H3>
getSearchStartOrTop</H3>
<PRE>
public int <B>getSearchStartOrTop</B>()</PRE>
<DL>
<DD>Get the position from where the search should start,
which is either the searchStart property, or the top
of the stack if that value is -1.<DD><DL>
<DT><B>Returns:</B><DD>The position from where the search should start, which
is always greater than or equal to zero.</DL>
</DD>
</DL>
<HR>
<A NAME="getSearchStart()"><!-- --></A><H3>
getSearchStart</H3>
<PRE>
public int <B>getSearchStart</B>()</PRE>
<DL>
<DD>Get the position to start the search, or -1
if the search should start from the top.<DD><DL>
<DT><B>Returns:</B><DD>The position to start the search, or -1
if the search should start from the top.</DL>
</DD>
</DL>
<HR>
<A NAME="markGlobalStackFrame()"><!-- --></A><H3>
markGlobalStackFrame</H3>
<PRE>
public void <B>markGlobalStackFrame</B>()</PRE>
<DL>
<DD>Mark the top of the global stack frame.</DL>
<HR>
<A NAME="pushContextPosition(int)"><!-- --></A><H3>
pushContextPosition</H3>
<PRE>
public void <B>pushContextPosition</B>(int pos)</PRE>
<DL>
<DD>Push a context marker onto the contextPositions stack to let us know when
to stop searching for a var. This operation
usually corresponds to the start of a template.</DL>
<HR>
<A NAME="popContextPosition()"><!-- --></A><H3>
popContextPosition</H3>
<PRE>
public void <B>popContextPosition</B>()</PRE>
<DL>
<DD>Pop the current context position onto the contextPositions. This operation
usually corresponds to the ending of a template.</DL>
<HR>
<A NAME="getContextPos()"><!-- --></A><H3>
getContextPos</H3>
<PRE>
public int <B>getContextPos</B>()</PRE>
<DL>
<DD>Get the current context position.<DD><DL>
<DT><B>Returns:</B><DD>The context marker into the stack to let us know when
to stop searching for a var.</DL>
</DD>
</DL>
<HR>
<A NAME="pushContextMarker()"><!-- --></A><H3>
pushContextMarker</H3>
<PRE>
public void <B>pushContextMarker</B>()</PRE>
<DL>
<DD>Push the current top of the stack as
a context marker into the variables stack to let us know when
to stop searching for a var. This operation
usually corresponds to the start of a template.</DL>
<HR>
<A NAME="popCurrentContext()"><!-- --></A><H3>
popCurrentContext</H3>
<PRE>
public void <B>popCurrentContext</B>()</PRE>
<DL>
<DD>Pop the current context from the current context stack.</DL>
<HR>
<A NAME="pushOrReplaceParameter(org.apache.xml.utils.QName, org.apache.xpath.objects.XObject)"><!-- --></A><H3>
pushOrReplaceParameter</H3>
<PRE>
public void <B>pushOrReplaceParameter</B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname,
<A HREF="../../../org/apache/xpath/objects/XObject.html">XObject</A> xval)</PRE>
<DL>
<DD>Push a parameter onto the stack, or replace it
if it already exists. Don't forget
to call startContext before pushing a series of
arguments for a given macro call.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>qname</CODE> - The qualified name of the variable.<DD><CODE>val</CODE> - The wrapped value of the variable.</DL>
</DD>
</DL>
<HR>
<A NAME="remarkParams()"><!-- --></A><H3>
remarkParams</H3>
<PRE>
public void <B>remarkParams</B>()</PRE>
<DL>
<DD>Re-mark the variables in the current frame as all
being parameters.</DL>
<HR>
<A NAME="pushVariable(org.apache.xml.utils.QName, org.apache.xpath.objects.XObject)"><!-- --></A><H3>
pushVariable</H3>
<PRE>
public void <B>pushVariable</B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname,
<A HREF="../../../org/apache/xpath/objects/XObject.html">XObject</A> val)</PRE>
<DL>
<DD>Push an argument onto the stack. Don't forget
to call startContext before pushing a series of
arguments for a given macro call.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>qname</CODE> - The qualified name of the variable.<DD><CODE>val</CODE> - The wrapped value of the variable.</DL>
</DD>
</DL>
<HR>
<A NAME="pushVariableArg(org.apache.xpath.Arg)"><!-- --></A><H3>
pushVariableArg</H3>
<PRE>
public void <B>pushVariableArg</B>(<A HREF="../../../org/apache/xpath/Arg.html">Arg</A> arg)</PRE>
<DL>
<DD>Push an argument onto the stack. Don't forget
to call startContext before pushing a series of
arguments for a given macro call.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>arg</CODE> - The variable argument.</DL>
</DD>
</DL>
<HR>
<A NAME="getDeclaredVariable(org.apache.xml.utils.QName)"><!-- --></A><H3>
getDeclaredVariable</H3>
<PRE>
public <A HREF="../../../org/apache/xpath/Arg.html">Arg</A> <B>getDeclaredVariable</B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname)
throws <A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A></PRE>
<DL>
<DD>Returns a variable or parameter that is already declared,
either in the current context or in the global space.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>qname</CODE> - The qualified name of the variable.<DT><B>Returns:</B><DD>the Arg if the variable is already declared, otherwise <code>null</code>.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A> - </DL>
</DD>
</DL>
<HR>
<A NAME="getParamArg(org.apache.xml.utils.QName)"><!-- --></A><H3>
getParamArg</H3>
<PRE>
public <A HREF="../../../org/apache/xpath/Arg.html">Arg</A> <B>getParamArg</B>(<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> qname)
throws <A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A></PRE>
<DL>
<DD>Get the variable argument.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>qname</CODE> - The qualified name of the variable.<DT><B>Returns:</B><DD>the argument object.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A> - </DL>
</DD>
</DL>
<HR>
<A NAME="getVariable(org.apache.xpath.XPathContext, org.apache.xml.utils.QName)"><!-- --></A><H3>
getVariable</H3>
<PRE>
public <A HREF="../../../org/apache/xpath/objects/XObject.html">XObject</A> <B>getVariable</B>(<A HREF="../../../org/apache/xpath/XPathContext.html">XPathContext</A> xctxt,
<A HREF="../../../org/apache/xml/utils/QName.html">QName</A> name)
throws <A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A></PRE>
<DL>
<DD>Given a name, return an object representing
the value.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>qname</CODE> - The qualified name of the variable.<DT><B>Returns:</B><DD>The wrapped value of the variable.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A> - </DL>
</DD>
</DL>
<HR>
<A NAME="pushElemFrame()"><!-- --></A><H3>
pushElemFrame</H3>
<PRE>
public void <B>pushElemFrame</B>()</PRE>
<DL>
<DD>Push an argument onto the stack. Don't forget
to call startContext before pushing a series of
arguments for a given macro call.</DL>
<HR>
<A NAME="popElemFrame()"><!-- --></A><H3>
popElemFrame</H3>
<PRE>
public void <B>popElemFrame</B>()</PRE>
<DL>
<DD>Pop the current context from the current context stack.</DL>
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