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/*
* $Id: LoadDocument.java,v 1.10 2010-11-01 04:34:24 joehw Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.dom;
import java.io.FileNotFoundException;
import javax.xml.transform.stream.StreamSource;
import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.DOMCache;
import com.sun.org.apache.xalan.internal.xsltc.DOMEnhancedForDTM;
import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;
import com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl;
import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
import com.sun.org.apache.xml.internal.dtm.DTMManager;
import com.sun.org.apache.xml.internal.dtm.ref.DTMDefaultBase;
import com.sun.org.apache.xml.internal.dtm.ref.EmptyIterator;
import com.sun.org.apache.xml.internal.utils.SystemIDResolver;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
/**
* @author Morten Jorgensen
*/
public final class LoadDocument {
private static final String NAMESPACE_FEATURE =
"http://xml.org/sax/features/namespaces";
/**
* Interprets the arguments passed from the document() function (see
* com/sun/org/apache/xalan/internal/xsltc/compiler/DocumentCall.java) and returns an
* iterator containing the requested nodes. Builds a union-iterator if
* several documents are requested.
* 2 arguments arg1 and arg2. document(Obj, node-set) call
*/
public static DTMAxisIterator documentF(Object arg1, DTMAxisIterator arg2,
String xslURI, AbstractTranslet translet, DOM dom)
throws TransletException {
String baseURI = null;
final int arg2FirstNode = arg2.next();
if (arg2FirstNode == DTMAxisIterator.END) {
// the second argument node-set is empty
return EmptyIterator.getInstance();
} else {
//System.err.println("arg2FirstNode name: "
// + dom.getNodeName(arg2FirstNode )+"["
// +Integer.toHexString(arg2FirstNode )+"]");
baseURI = dom.getDocumentURI(arg2FirstNode);
if (!SystemIDResolver.isAbsoluteURI(baseURI))
baseURI = SystemIDResolver.getAbsoluteURIFromRelative(baseURI);
}
try {
if (arg1 instanceof String) {
if (((String)arg1).length() == 0) {
return document(xslURI, "", translet, dom);
} else {
return document((String)arg1, baseURI, translet, dom);
}
} else if (arg1 instanceof DTMAxisIterator) {
return document((DTMAxisIterator)arg1, baseURI, translet, dom);
} else {
final String err = "document("+arg1.toString()+")";
throw new IllegalArgumentException(err);
}
} catch (Exception e) {
throw new TransletException(e);
}
}
/**
* Interprets the arguments passed from the document() function (see
* com/sun/org/apache/xalan/internal/xsltc/compiler/DocumentCall.java) and returns an
* iterator containing the requested nodes. Builds a union-iterator if
* several documents are requested.
* 1 arguments arg. document(Obj) call
*/
public static DTMAxisIterator documentF(Object arg, String xslURI,
AbstractTranslet translet, DOM dom)
throws TransletException {
try {
if (arg instanceof String) {
if (xslURI == null )
xslURI = "";
String baseURI = xslURI;
if (!SystemIDResolver.isAbsoluteURI(xslURI))
baseURI = SystemIDResolver.getAbsoluteURIFromRelative(xslURI);
String href = (String)arg;
if (href.length() == 0) {
href = "";
// %OPT% Optimization to cache the stylesheet DOM.
// The stylesheet DOM is built once and cached
// in the Templates object.
TemplatesImpl templates = (TemplatesImpl)translet.getTemplates();
DOM sdom = null;
if (templates != null) {
sdom = templates.getStylesheetDOM();
}
// If the cached dom exists, we need to migrate it
// to the new DTMManager and create a DTMAxisIterator
// for the document.
if (sdom != null) {
return document(sdom, translet, dom);
}
else {
return document(href, baseURI, translet, dom, true);
}
}
else {
return document(href, baseURI, translet, dom);
}
} else if (arg instanceof DTMAxisIterator) {
return document((DTMAxisIterator)arg, null, translet, dom);
} else {
final String err = "document("+arg.toString()+")";
throw new IllegalArgumentException(err);
}
} catch (Exception e) {
throw new TransletException(e);
}
}
private static DTMAxisIterator document(String uri, String base,
AbstractTranslet translet, DOM dom)
throws Exception
{
return document(uri, base, translet, dom, false);
}
private static DTMAxisIterator document(String uri, String base,
AbstractTranslet translet, DOM dom,
boolean cacheDOM)
throws Exception
{
try {
final String originalUri = uri;
MultiDOM multiplexer = (MultiDOM)dom;
// Prepend URI base to URI (from context)
if (base != null && !base.equals("")) {
uri = SystemIDResolver.getAbsoluteURI(uri, base);
}
// Return an empty iterator if the URI is clearly invalid
// (to prevent some unncessary MalformedURL exceptions).
if (uri == null || uri.equals("")) {
return(EmptyIterator.getInstance());
}
// Check if this DOM has already been added to the multiplexer
int mask = multiplexer.getDocumentMask(uri);
if (mask != -1) {
DOM newDom = ((DOMAdapter)multiplexer.getDOMAdapter(uri))
.getDOMImpl();
if (newDom instanceof DOMEnhancedForDTM) {
return new SingletonIterator(((DOMEnhancedForDTM)newDom)
.getDocument(),
true);
}
}
// Check if we can get the DOM from a DOMCache
DOMCache cache = translet.getDOMCache();
DOM newdom;
mask = multiplexer.nextMask(); // peek
if (cache != null) {
newdom = cache.retrieveDocument(base, originalUri, translet);
if (newdom == null) {
final Exception e = new FileNotFoundException(originalUri);
throw new TransletException(e);
}
} else {
// Parse the input document and construct DOM object
// Trust the DTMManager to pick the right parser and
// set up the DOM correctly.
XSLTCDTMManager dtmManager = (XSLTCDTMManager)multiplexer
.getDTMManager();
DOMEnhancedForDTM enhancedDOM =
(DOMEnhancedForDTM) dtmManager.getDTM(new StreamSource(uri),
false, null, true, false,
translet.hasIdCall(), cacheDOM);
newdom = enhancedDOM;
// Cache the stylesheet DOM in the Templates object
if (cacheDOM) {
TemplatesImpl templates = (TemplatesImpl)translet.getTemplates();
if (templates != null) {
templates.setStylesheetDOM(enhancedDOM);
}
}
translet.prepassDocument(enhancedDOM);
enhancedDOM.setDocumentURI(uri);
}
// Wrap the DOM object in a DOM adapter and add to multiplexer
final DOMAdapter domAdapter = translet.makeDOMAdapter(newdom);
multiplexer.addDOMAdapter(domAdapter);
// Create index for any key elements
translet.buildKeys(domAdapter, null, null, newdom.getDocument());
// Return a singleton iterator containing the root node
return new SingletonIterator(newdom.getDocument(), true);
} catch (Exception e) {
throw e;
}
}
private static DTMAxisIterator document(DTMAxisIterator arg1,
String baseURI,
AbstractTranslet translet, DOM dom)
throws Exception
{
UnionIterator union = new UnionIterator(dom);
int node = DTM.NULL;
while ((node = arg1.next()) != DTM.NULL) {
String uri = dom.getStringValueX(node);
//document(node-set) if true; document(node-set,node-set) if false
if (baseURI == null) {
baseURI = dom.getDocumentURI(node);
if (!SystemIDResolver.isAbsoluteURI(baseURI))
baseURI = SystemIDResolver.getAbsoluteURIFromRelative(baseURI);
}
union.addIterator(document(uri, baseURI, translet, dom));
}
return(union);
}
/**
* Create a DTMAxisIterator for the newdom. This is currently only
* used to create an iterator for the cached stylesheet DOM.
*
* @param newdom the cached stylesheet DOM
* @param translet the translet
* @param the main dom (should be a MultiDOM)
* @return a DTMAxisIterator from the document root
*/
private static DTMAxisIterator document(DOM newdom,
AbstractTranslet translet,
DOM dom)
throws Exception
{
DTMManager dtmManager = ((MultiDOM)dom).getDTMManager();
// Need to migrate the cached DTM to the new DTMManager
if (dtmManager != null && newdom instanceof DTM) {
((DTM)newdom).migrateTo(dtmManager);
}
translet.prepassDocument(newdom);
// Wrap the DOM object in a DOM adapter and add to multiplexer
final DOMAdapter domAdapter = translet.makeDOMAdapter(newdom);
((MultiDOM)dom).addDOMAdapter(domAdapter);
// Create index for any key elements
translet.buildKeys(domAdapter, null, null,
newdom.getDocument());
// Return a singleton iterator containing the root node
return new SingletonIterator(newdom.getDocument(), true);
}
}