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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<!--NewPage-->
<HTML>
<HEAD>
<!-- Generated by javadoc on Thu Mar 15 14:18:28 EST 2001 -->
<TITLE>
Xalan-Java 2: Class  DOMHelper
</TITLE>
<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style">
</HEAD>
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  SUMMARY: &nbsp;INNER&nbsp;|&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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org.apache.xpath</FONT>
<BR>
Class  DOMHelper</H2>
<PRE>
java.lang.Object
  |
  +--<B>org.apache.xpath.DOMHelper</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../org/apache/xpath/DOM2Helper.html">DOM2Helper</A></DD>
</DL>
<HR>
<DL>
<DT>public class <B>DOMHelper</B><DT>extends java.lang.Object</DL>

<P>
<i><font size="-1" color="#00FF00">**For advanced use only** </font></i><meta name="usage" content="advanced"/>
 This class provides a front-end to DOM implementations, providing
 a number of utility functions that either aren't yet standardized
 by the DOM spec or that are defined in optional DOM modules and
 hence may not be present in all DOMs.
<P>
<HR>

<P>
<!-- ======== INNER CLASS SUMMARY ======== -->


<!-- =========== FIELD SUMMARY =========== -->


<!-- ======== CONSTRUCTOR SUMMARY ======== -->

<A NAME="constructor_summary"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Constructor Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#DOMHelper()">DOMHelper</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== METHOD SUMMARY =========== -->

<A NAME="method_summary"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Method Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/w3c/dom/Document.html">Document</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#createDocument()">createDocument</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DOM Level 1 did not have a standard mechanism for creating a new
 Document object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/w3c/dom/Document.html">Document</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getDOMFactory()">getDOMFactory</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieve the factory object required to create DOM nodes
 in the result tree.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/w3c/dom/Element.html">Element</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getElementByID(java.lang.String, org.w3c.dom.Document)">getElementByID</A></B>(java.lang.String&nbsp;id,
               <A HREF="../../../org/w3c/dom/Document.html">Document</A>&nbsp;doc)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Given an ID, return the element.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getExpandedAttributeName(org.w3c.dom.Attr)">getExpandedAttributeName</A></B>(<A HREF="../../../org/w3c/dom/Attr.html">Attr</A>&nbsp;attr)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the attribute name with the namespace prefix (if any) replaced
 by the Namespace URI it was bound to.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getExpandedElementName(org.w3c.dom.Element)">getExpandedElementName</A></B>(<A HREF="../../../org/w3c/dom/Element.html">Element</A>&nbsp;elem)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the element name with the namespace prefix (if any) replaced
 by the Namespace URI it was bound to.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;short</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getLevel(org.w3c.dom.Node)">getLevel</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<i><font size="-1" color="#FF0000">**For internal use only** </font></i><meta name="usage" content="internal"/>
 Get the depth level of this node in the tree (equals 1 for
 a parentless node).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getLocalNameOfNode(org.w3c.dom.Node)">getLocalNameOfNode</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the local name of the given node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getNamespaceForPrefix(java.lang.String, org.w3c.dom.Element)">getNamespaceForPrefix</A></B>(java.lang.String&nbsp;prefix,
                      <A HREF="../../../org/w3c/dom/Element.html">Element</A>&nbsp;namespaceContext)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Given an XML Namespace prefix and a context in which the prefix
 is to be evaluated, return the Namespace Name this prefix was 
 bound to.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getNamespaceOfNode(org.w3c.dom.Node)">getNamespaceOfNode</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the namespace of the given node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getNodeData(org.w3c.dom.Node)">getNodeData</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the textual contents of the node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getNodeData(org.w3c.dom.Node, org.apache.xml.utils.FastStringBuffer)">getNodeData</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node,
            <A HREF="../../../org/apache/xml/utils/FastStringBuffer.html">FastStringBuffer</A>&nbsp;buf)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Retrieve the text content of a DOM subtree, appending it into a
 user-supplied FastStringBuffer object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/w3c/dom/Node.html">Node</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getParentOfNode(org.w3c.dom.Node)">getParentOfNode</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Obtain the XPath-model parent of a DOM node -- ownerElement for Attrs,
 parent for other nodes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/w3c/dom/Node.html">Node</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getRoot(org.w3c.dom.Node)">getRoot</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I></I>&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../org/w3c/dom/Node.html">Node</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getRootNode(org.w3c.dom.Node)">getRootNode</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the root node of the document tree, regardless of
 whether or not the node passed in is a document node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getUniqueID(org.w3c.dom.Node)">getUniqueID</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Supports the XPath function GenerateID by returning a unique
 identifier string for any given DOM Node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#getUnparsedEntityURI(java.lang.String, org.w3c.dom.Document)">getUnparsedEntityURI</A></B>(java.lang.String&nbsp;name,
                     <A HREF="../../../org/w3c/dom/Document.html">Document</A>&nbsp;doc)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The getUnparsedEntityURI function returns the URI of the unparsed
 entity with the specified name in the same document as the context
 node (see [3.3 Unparsed Entities]).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#isIgnorableWhitespace(org.w3c.dom.Text)">isIgnorableWhitespace</A></B>(<A HREF="../../../org/w3c/dom/Text.html">Text</A>&nbsp;node)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I></I>&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#isNamespaceNode(org.w3c.dom.Node)">isNamespaceNode</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Test whether the given node is a namespace decl node.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#isNodeAfter(org.w3c.dom.Node, org.w3c.dom.Node)">isNodeAfter</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node1,
            <A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node2)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Figure out whether node2 should be considered as being later
 in the document than node1, in Document Order as defined
 by the XPath model.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#setDOMFactory(org.w3c.dom.Document)">setDOMFactory</A></B>(<A HREF="../../../org/w3c/dom/Document.html">Document</A>&nbsp;domFactory)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Store the factory object required to create DOM nodes
 in the result tree.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/xpath/DOMHelper.html#shouldStripSourceNode(org.w3c.dom.Node)">shouldStripSourceNode</A></B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;textNode)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<i><font size="-1" color="#00FF00">**For advanced use only** </font></i><meta name="usage" content="advanced"/>
 Tells, through the combination of the default-space attribute
 on xsl:stylesheet, xsl:strip-space, xsl:preserve-space, and the
 xml:space attribute, whether or not extra whitespace should be stripped
 from the node.</TD>
</TR>
</TABLE>
&nbsp;<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>equals, 
getClass, 
hashCode, 
notify, 
notifyAll, 
toString, 
wait, 
wait, 
wait</CODE></TD>
</TR>
</TABLE>
&nbsp;
<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="DOMHelper()"><!-- --></A><H3>
DOMHelper</H3>
<PRE>
public <B>DOMHelper</B>()</PRE>
<DL>
</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="createDocument()"><!-- --></A><H3>
createDocument</H3>
<PRE>
public <A HREF="../../../org/w3c/dom/Document.html">Document</A> <B>createDocument</B>()</PRE>
<DL>
<DD>DOM Level 1 did not have a standard mechanism for creating a new
 Document object. This function provides a DOM-implementation-independent
 abstraction for that for that concept. It's typically used when 
 outputting a new DOM as the result of an operation.
 <p>
 TODO: This isn't directly compatable with DOM Level 2. 
 The Level 2 createDocument call also creates the root 
 element, and thus requires that you know what that element will be
 before creating the Document. We should think about whether we want
 to change this code, and the callers, so we can use the DOM's own 
 method. (It's also possible that DOM Level 3 may relax this
 sequence, but you may give up some intelligence in the DOM by
 doing so; the intent was that knowing the document type and root
 element might let the DOM automatically switch to a specialized
 subclass for particular kinds of documents.)<DD><DL>
<DT><B>Returns:</B><DD>The newly created DOM Document object, with no children, or
 null if we can't find a DOM implementation that permits creating
 new empty Documents.</DL>
</DD>
</DL>
<HR>

<A NAME="shouldStripSourceNode(org.w3c.dom.Node)"><!-- --></A><H3>
shouldStripSourceNode</H3>
<PRE>
public boolean <B>shouldStripSourceNode</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;textNode)
                              throws <A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A></PRE>
<DL>
<DD><i><font size="-1" color="#00FF00">**For advanced use only** </font></i><meta name="usage" content="advanced"/>
 Tells, through the combination of the default-space attribute
 on xsl:stylesheet, xsl:strip-space, xsl:preserve-space, and the
 xml:space attribute, whether or not extra whitespace should be stripped
 from the node.  Literal elements from template elements should
 <em>not</em> be tested with this function.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>textNode</CODE> - A text node from the source tree.<DT><B>Returns:</B><DD>true if the text node should be stripped of extra whitespace.<DT><B>Throws:</B><DD><A HREF="../../../javax/xml/transform/TransformerException.html">TransformerException</A> - &nbsp;</DL>
</DD>
</DL>
<HR>

<A NAME="getUniqueID(org.w3c.dom.Node)"><!-- --></A><H3>
getUniqueID</H3>
<PRE>
public java.lang.String <B>getUniqueID</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</PRE>
<DL>
<DD>Supports the XPath function GenerateID by returning a unique
 identifier string for any given DOM Node.
 <p>
 Warning: The base implementation uses the Node object's hashCode(),
 which is NOT guaranteed to be unique. If that method hasn't been
 overridden in this DOM ipmlementation, most Java implementions will
 derive it from the object's address and should be OK... but if
 your DOM uses a different definition of hashCode (eg hashing the
 contents of the subtree), or if your DOM may have multiple objects
 that represent a single Node in the data structure (eg via proxying),
 you may need to find another way to assign a unique identifier.
 <p>
 Also, be aware that if nodes are destroyed and recreated, there is
 an open issue regarding whether an ID may be reused. Currently
 we're assuming that the input document is stable for the duration
 of the XPath/XSLT operation, so this shouldn't arise in this context.
 <p>
 (DOM Level 3 is investigating providing a unique node "key", but
 that won't help Level 1 and Level 2 implementations.)<DD><DL>
<DT><B>Parameters:</B><DD><CODE>node</CODE> - whose identifier you want to obtain<DT><B>Returns:</B><DD>a string which should be different for every Node object.</DL>
</DD>
</DL>
<HR>

<A NAME="isNodeAfter(org.w3c.dom.Node, org.w3c.dom.Node)"><!-- --></A><H3>
isNodeAfter</H3>
<PRE>
public boolean <B>isNodeAfter</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node1,
                           <A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node2)</PRE>
<DL>
<DD>Figure out whether node2 should be considered as being later
 in the document than node1, in Document Order as defined
 by the XPath model. This may not agree with the ordering defined
 by other XML applications.
 <p>
 There are some cases where ordering isn't defined, and neither are
 the results of this function -- though we'll generally return true.
 
 TODO: Make sure this does the right thing with attribute nodes!!!<DD><DL>
<DT><B>Parameters:</B><DD><CODE>node1</CODE> - DOM Node to perform position comparison on.<DD><CODE>node2</CODE> - DOM Node to perform position comparison on .<DT><B>Returns:</B><DD>false if node2 comes before node1, otherwise return true.
 You can think of this as 
 <code>(node1.documentOrderPosition &lt;= node2.documentOrderPosition)</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="getLevel(org.w3c.dom.Node)"><!-- --></A><H3>
getLevel</H3>
<PRE>
public short <B>getLevel</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</PRE>
<DL>
<DD><i><font size="-1" color="#FF0000">**For internal use only** </font></i><meta name="usage" content="internal"/>
 Get the depth level of this node in the tree (equals 1 for
 a parentless node).<DD><DL>
<DT><B>Parameters:</B><DD><CODE>n</CODE> - Node to be examined.<DT><B>Returns:</B><DD>the number of ancestors, plus one</DL>
</DD>
</DL>
<HR>

<A NAME="getNamespaceForPrefix(java.lang.String, org.w3c.dom.Element)"><!-- --></A><H3>
getNamespaceForPrefix</H3>
<PRE>
public java.lang.String <B>getNamespaceForPrefix</B>(java.lang.String&nbsp;prefix,
                                              <A HREF="../../../org/w3c/dom/Element.html">Element</A>&nbsp;namespaceContext)</PRE>
<DL>
<DD>Given an XML Namespace prefix and a context in which the prefix
 is to be evaluated, return the Namespace Name this prefix was 
 bound to. Note that DOM Level 3 is expected to provide a version of
 this which deals with the DOM's "early binding" behavior.
 
 Default handling:<DD><DL>
<DT><B>Parameters:</B><DD><CODE>prefix</CODE> - String containing namespace prefix to be resolved, 
 without the ':' which separates it from the localname when used 
 in a Node Name. The empty sting signifies the default namespace
 at this point in the document.<DD><CODE>namespaceContext</CODE> - Element which provides context for resolution.
 (We could extend this to work for other nodes by first seeking their
 nearest Element ancestor.)<DT><B>Returns:</B><DD>a String containing the Namespace URI which this prefix
 represents in the specified context.</DL>
</DD>
</DL>
<HR>

<A NAME="getNamespaceOfNode(org.w3c.dom.Node)"><!-- --></A><H3>
getNamespaceOfNode</H3>
<PRE>
public java.lang.String <B>getNamespaceOfNode</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</PRE>
<DL>
<DD>Returns the namespace of the given node. Differs from simply getting
 the node's prefix and using getNamespaceForPrefix in that it attempts
 to cache some of the data in NSINFO objects, to avoid repeated lookup.
 TODO: Should we consider moving that logic into getNamespaceForPrefix?<DD><DL>
<DT><B>Parameters:</B><DD><CODE>n</CODE> - Node to be examined.<DT><B>Returns:</B><DD>String containing the Namespace Name (uri) for this node.
 Note that this is undefined for any nodes other than Elements and
 Attributes.</DL>
</DD>
</DL>
<HR>

<A NAME="getLocalNameOfNode(org.w3c.dom.Node)"><!-- --></A><H3>
getLocalNameOfNode</H3>
<PRE>
public java.lang.String <B>getLocalNameOfNode</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</PRE>
<DL>
<DD>Returns the local name of the given node. If the node's name begins
 with a namespace prefix, this is the part after the colon; otherwise
 it's the full node name.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>n</CODE> - the node to be examined.<DT><B>Returns:</B><DD>String containing the Local Name</DL>
</DD>
</DL>
<HR>

<A NAME="getExpandedElementName(org.w3c.dom.Element)"><!-- --></A><H3>
getExpandedElementName</H3>
<PRE>
public java.lang.String <B>getExpandedElementName</B>(<A HREF="../../../org/w3c/dom/Element.html">Element</A>&nbsp;elem)</PRE>
<DL>
<DD>Returns the element name with the namespace prefix (if any) replaced
 by the Namespace URI it was bound to. This is not a standard 
 representation of a node name, but it allows convenient 
 single-string comparison of the "universal" names of two nodes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>elem</CODE> - Element to be examined.<DT><B>Returns:</B><DD>String in the form "namespaceURI:localname" if the node
 belongs to a namespace, or simply "localname" if it doesn't.<DT><B>See Also: </B><DD><A HREF="../../../org/apache/xpath/DOMHelper.html#getExpandedAttributeName(org.w3c.dom.Attr)"><CODE>getExpandedAttributeName(org.w3c.dom.Attr)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getExpandedAttributeName(org.w3c.dom.Attr)"><!-- --></A><H3>
getExpandedAttributeName</H3>
<PRE>
public java.lang.String <B>getExpandedAttributeName</B>(<A HREF="../../../org/w3c/dom/Attr.html">Attr</A>&nbsp;attr)</PRE>
<DL>
<DD>Returns the attribute name with the namespace prefix (if any) replaced
 by the Namespace URI it was bound to. This is not a standard 
 representation of a node name, but it allows convenient 
 single-string comparison of the "universal" names of two nodes.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>attr</CODE> - Attr to be examined<DT><B>Returns:</B><DD>String in the form "namespaceURI:localname" if the node
 belongs to a namespace, or simply "localname" if it doesn't.<DT><B>See Also: </B><DD><A HREF="../../../org/apache/xpath/DOMHelper.html#getExpandedElementName(org.w3c.dom.Element)"><CODE>getExpandedElementName(org.w3c.dom.Element)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isIgnorableWhitespace(org.w3c.dom.Text)"><!-- --></A><H3>
isIgnorableWhitespace</H3>
<PRE>
public boolean <B>isIgnorableWhitespace</B>(<A HREF="../../../org/w3c/dom/Text.html">Text</A>&nbsp;node)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I></I>&nbsp;<DD>Tell if the node is ignorable whitespace. Note that this can
 be determined only in the context of a DTD or other Schema,
 and that DOM Level 2 has nostandardized DOM API which can
 return that information.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>node</CODE> - Node to be examined<DT><B>Returns:</B><DD>CURRENTLY HARDCODED TO FALSE, but should return true if
 and only if the node is of type Text, contains only whitespace,
 and does not appear as part of the #PCDATA content of an element.
 (Note that determining this last may require allowing for 
 Entity References.)</DL>
</DD>
</DL>
<HR>

<A NAME="getRoot(org.w3c.dom.Node)"><!-- --></A><H3>
getRoot</H3>
<PRE>
public <A HREF="../../../org/w3c/dom/Node.html">Node</A> <B>getRoot</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I></I>&nbsp;<DD>Get the first unparented node in the ancestor chain.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>node</CODE> - Starting node, to specify which chain to chase<DT><B>Returns:</B><DD>the topmost ancestor.</DL>
</DD>
</DL>
<HR>

<A NAME="getRootNode(org.w3c.dom.Node)"><!-- --></A><H3>
getRootNode</H3>
<PRE>
public <A HREF="../../../org/w3c/dom/Node.html">Node</A> <B>getRootNode</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</PRE>
<DL>
<DD>Get the root node of the document tree, regardless of
 whether or not the node passed in is a document node.
 <p>
 TODO: This doesn't handle DocumentFragments or "orphaned" subtrees
 -- it's currently returning ownerDocument even when the tree is
 not actually part of the main Document tree. We should either
 rewrite the description to say that it finds the Document node,
 or change the code to walk up the ancestor chain.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>n</CODE> - Node to be examined<DT><B>Returns:</B><DD>the Document node. Note that this is not the correct answer
 if n was (or was a child of) a DocumentFragment or an orphaned node,
 as can arise if the DOM has been edited rather than being generated
 by a parser.</DL>
</DD>
</DL>
<HR>

<A NAME="isNamespaceNode(org.w3c.dom.Node)"><!-- --></A><H3>
isNamespaceNode</H3>
<PRE>
public boolean <B>isNamespaceNode</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;n)</PRE>
<DL>
<DD>Test whether the given node is a namespace decl node. In DOM Level 2
 this can be done in a namespace-aware manner, but in Level 1 DOMs
 it has to be done by testing the node name.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>n</CODE> - Node to be examined.<DT><B>Returns:</B><DD>boolean -- true iff the node is an Attr whose name is 
 "xmlns" or has the "xmlns:" prefix.</DL>
</DD>
</DL>
<HR>

<A NAME="getParentOfNode(org.w3c.dom.Node)"><!-- --></A><H3>
getParentOfNode</H3>
<PRE>
public <A HREF="../../../org/w3c/dom/Node.html">Node</A> <B>getParentOfNode</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)
                     throws java.lang.RuntimeException</PRE>
<DL>
<DD>Obtain the XPath-model parent of a DOM node -- ownerElement for Attrs,
 parent for other nodes. 
 <p>
 Background: The DOM believes that you must be your Parent's
 Child, and thus Attrs don't have parents. XPath said that Attrs
 do have their owning Element as their parent. This function
 bridges the difference, either by using the DOM Level 2 ownerElement
 function or by using a "silly and expensive function" in Level 1
 DOMs.
 <p>
 (There's some discussion of future DOMs generalizing ownerElement 
 into ownerNode and making it work on all types of nodes. This
 still wouldn't help the users of Level 1 or Level 2 DOMs)
 <p><DD><DL>
<DT><B>Parameters:</B><DD><CODE>node</CODE> - Node whose XPath parent we want to obtain<DT><B>Returns:</B><DD>the parent of the node, or the ownerElement if it's an
 Attr node, or null if the node is an orphan.<DT><B>Throws:</B><DD>java.lang.RuntimeException - if the Document has no root element.
 This can't arise if the Document was created
 via the DOM Level 2 factory methods, but is possible if other
 mechanisms were used to obtain it</DL>
</DD>
</DL>
<HR>

<A NAME="getElementByID(java.lang.String, org.w3c.dom.Document)"><!-- --></A><H3>
getElementByID</H3>
<PRE>
public <A HREF="../../../org/w3c/dom/Element.html">Element</A> <B>getElementByID</B>(java.lang.String&nbsp;id,
                              <A HREF="../../../org/w3c/dom/Document.html">Document</A>&nbsp;doc)</PRE>
<DL>
<DD>Given an ID, return the element. This can work only if the document
 is interpreted in the context of a DTD or Schema, since otherwise
 we don't know which attributes are or aren't IDs.
 <p>
 Note that DOM Level 1 had no ability to retrieve this information.
 DOM Level 2 introduced it but does not promise that it will be
 supported in all DOMs; those which can't support it will always
 return null.
 <p>
 TODO: getElementByID is currently unimplemented. Support DOM Level 2?<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - The unique identifier to be searched for.<DD><CODE>doc</CODE> - The document to search within.<DT><B>Returns:</B><DD>CURRENTLY HARDCODED TO NULL, but it should be:
 The node which has this unique identifier, or null if there
 is no such node or this DOM can't reliably recognize it.</DL>
</DD>
</DL>
<HR>

<A NAME="getUnparsedEntityURI(java.lang.String, org.w3c.dom.Document)"><!-- --></A><H3>
getUnparsedEntityURI</H3>
<PRE>
public java.lang.String <B>getUnparsedEntityURI</B>(java.lang.String&nbsp;name,
                                             <A HREF="../../../org/w3c/dom/Document.html">Document</A>&nbsp;doc)</PRE>
<DL>
<DD>The getUnparsedEntityURI function returns the URI of the unparsed
 entity with the specified name in the same document as the context
 node (see [3.3 Unparsed Entities]). It returns the empty string if
 there is no such entity.
 <p>
 XML processors may choose to use the System Identifier (if one
 is provided) to resolve the entity, rather than the URI in the
 Public Identifier. The details are dependent on the processor, and
 we would have to support some form of plug-in resolver to handle
 this properly. Currently, we simply return the System Identifier if
 present, and hope that it a usable URI or that our caller can
 map it to one.
 TODO: Resolve Public Identifiers... or consider changing function name.
 <p>
 If we find a relative URI 
 reference, XML expects it to be resolved in terms of the base URI 
 of the document. The DOM doesn't do that for us, and it isn't 
 entirely clear whether that should be done here; currently that's
 pushed up to a higher levelof our application. (Note that DOM Level 
 1 didn't store the document's base URI.)
 TODO: Consider resolving Relative URIs.
 <p>
 (The DOM's statement that "An XML processor may choose to
 completely expand entities before the structure model is passed
 to the DOM" refers only to parsed entities, not unparsed, and hence
 doesn't affect this function.)<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - A string containing the Entity Name of the unparsed
 entity.<DD><CODE>doc</CODE> - Document node for the document to be searched.<DT><B>Returns:</B><DD>String containing the URI of the Unparsed Entity, or an
 empty string if no such entity exists.</DL>
</DD>
</DL>
<HR>

<A NAME="setDOMFactory(org.w3c.dom.Document)"><!-- --></A><H3>
setDOMFactory</H3>
<PRE>
public void <B>setDOMFactory</B>(<A HREF="../../../org/w3c/dom/Document.html">Document</A>&nbsp;domFactory)</PRE>
<DL>
<DD>Store the factory object required to create DOM nodes
 in the result tree. In fact, that's just the result tree's
 Document node...<DD><DL>
<DT><B>Parameters:</B><DD><CODE>domFactory</CODE> - The DOM Document Node within whose context
 the result tree will be built.</DL>
</DD>
</DL>
<HR>

<A NAME="getDOMFactory()"><!-- --></A><H3>
getDOMFactory</H3>
<PRE>
public <A HREF="../../../org/w3c/dom/Document.html">Document</A> <B>getDOMFactory</B>()</PRE>
<DL>
<DD>Retrieve the factory object required to create DOM nodes
 in the result tree.<DD><DL>
<DT><B>Returns:</B><DD>The result tree's DOM Document Node.</DL>
</DD>
</DL>
<HR>

<A NAME="getNodeData(org.w3c.dom.Node)"><!-- --></A><H3>
getNodeData</H3>
<PRE>
public static java.lang.String <B>getNodeData</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node)</PRE>
<DL>
<DD>Get the textual contents of the node. See
 getNodeData(Node,FastStringBuffer) for discussion of how
 whitespace nodes are handled.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>node</CODE> - DOM Node to be examined<DT><B>Returns:</B><DD>String containing a concatenation of all the 
 textual content within that node.<DT><B>See Also: </B><DD><A HREF="../../../org/apache/xpath/DOMHelper.html#getNodeData(org.w3c.dom.Node, org.apache.xml.utils.FastStringBuffer)"><CODE>getNodeData(Node,FastStringBuffer)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getNodeData(org.w3c.dom.Node, org.apache.xml.utils.FastStringBuffer)"><!-- --></A><H3>
getNodeData</H3>
<PRE>
public static void <B>getNodeData</B>(<A HREF="../../../org/w3c/dom/Node.html">Node</A>&nbsp;node,
                               <A HREF="../../../org/apache/xml/utils/FastStringBuffer.html">FastStringBuffer</A>&nbsp;buf)</PRE>
<DL>
<DD>Retrieve the text content of a DOM subtree, appending it into a
 user-supplied FastStringBuffer object. Note that attributes are
 not considered part of the content of an element.
 <p>
 There are open questions regarding whitespace stripping. 
 Currently we make no special effort in that regard, since the standard
 DOM doesn't yet provide DTD-based information to distinguish
 whitespace-in-element-context from genuine #PCDATA. Note that we
 should probably also consider xml:space if/when we address this.
 DOM Level 3 may solve the problem for us.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>node</CODE> - Node whose subtree is to be walked, gathering the
 contents of all Text or CDATASection nodes.<DD><CODE>buf</CODE> - FastStringBuffer into which the contents of the text
 nodes are to be concatenated.</DL>
</DD>
</DL>
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