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/*
* $Id: DOMWSFilter.java,v 1.10 2010-11-01 04:34:24 joehw Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.dom;
import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.DOMEnhancedForDTM;
import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;
import com.sun.org.apache.xalan.internal.xsltc.runtime.Hashtable;
import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xml.internal.dtm.DTMWSFilter;
/**
* A wrapper class that adapts the
* {@link com.sun.org.apache.xml.internal.dtm.DTMWSFilter DTMWSFilter} interface to the XSLTC
* DOM {@link com.sun.org.apache.xalan.internal.xsltc.StripFilter StripFilter} interface.
*/
public class DOMWSFilter implements DTMWSFilter {
private AbstractTranslet m_translet;
private StripFilter m_filter;
// The Hashtable for DTM to mapping array
private Hashtable m_mappings;
// Cache the DTM and mapping that are used last time
private DTM m_currentDTM;
private short[] m_currentMapping;
/**
* Construct an adapter connecting the DTMWSFilter
interface
* to the StripFilter
interface.
*
* @param translet A translet that also implements the StripFilter
* interface.
*
* @see com.sun.org.apache.xml.internal.dtm.DTMWSFilter
* @see com.sun.org.apache.xalan.internal.xsltc.StripFilter
*/
public DOMWSFilter(AbstractTranslet translet) {
m_translet = translet;
m_mappings = new Hashtable();
if (translet instanceof StripFilter) {
m_filter = (StripFilter) translet;
}
}
/**
* Test whether whitespace-only text nodes are visible in the logical
* view of DTM
. Normally, this function
* will be called by the implementation of DTM
;
* it is not normally called directly from
* user code.
*
* @param node int handle of the node.
* @param dtm the DTM that owns this node
* @return one of NOTSTRIP
, STRIP
or
* INHERIT
.
*/
public short getShouldStripSpace(int node, DTM dtm) {
if (m_filter != null && dtm instanceof DOM) {
DOM dom = (DOM)dtm;
int type = 0;
if (dtm instanceof DOMEnhancedForDTM) {
DOMEnhancedForDTM mappableDOM = (DOMEnhancedForDTM)dtm;
short[] mapping;
if (dtm == m_currentDTM) {
mapping = m_currentMapping;
}
else {
mapping = (short[])m_mappings.get(dtm);
if (mapping == null) {
mapping = mappableDOM.getMapping(
m_translet.getNamesArray(),
m_translet.getUrisArray(),
m_translet.getTypesArray());
m_mappings.put(dtm, mapping);
m_currentDTM = dtm;
m_currentMapping = mapping;
}
}
int expType = mappableDOM.getExpandedTypeID(node);
// %OPT% The mapping array does not have information about all the
// exptypes. However it does contain enough information about all names
// in the translet's namesArray. If the expType does not fall into the
// range of the mapping array, it means that the expType is not for one
// of the recognized names. In this case we can just set the type to -1.
if (expType >= 0 && expType < mapping.length)
type = mapping[expType];
else
type = -1;
}
else {
return INHERIT;
}
if (m_filter.stripSpace(dom, node, type)) {
return STRIP;
} else {
return NOTSTRIP;
}
} else {
return NOTSTRIP;
}
}
}