/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.xsl.fun;
import com.caucho.vfs.Path;
import com.caucho.xml.CauchoNode;
import com.caucho.xml.LooseHtml;
import com.caucho.xml.QDocument;
import com.caucho.xml.Xml;
import com.caucho.xpath.Env;
import com.caucho.xpath.Expr;
import com.caucho.xpath.ExprEnvironment;
import com.caucho.xpath.XPathException;
import com.caucho.xpath.XPathFun;
import com.caucho.xpath.pattern.AbstractPattern;
import com.caucho.xsl.TransformerImpl;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Node;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* The document(...) function.
*/
public class DocumentFun extends XPathFun {
private static final Logger log
= Logger.getLogger(DocumentFun.class.getName());
TransformerImpl _transformer;
boolean _isHtml;
public DocumentFun(TransformerImpl transformer)
{
_transformer = transformer;
}
public void setHtml(boolean isHtml)
{
_isHtml = isHtml;
}
/**
* Evaluate the function.
*
* @param pattern The context pattern.
* @param args The evaluated arguments
*/
public Object eval(Node node, ExprEnvironment env,
AbstractPattern pattern, ArrayList args)
throws XPathException
{
if (args.size() < 1)
return null;
Node basenode;
String name = Expr.toString(args.get(0));
if (args.size() > 1)
basenode = Expr.toNode(args.get(1));
else
basenode = Expr.toNode(args.get(0));
Path stylesheetPath = env.getStylesheetEnv().getPath();
URIResolver resolver = _transformer.getURIResolver();
Path path;
if (name == null || name.equals(""))
name = stylesheetPath.getTail();
String systemId = null;
DocumentType dtd = null;
Document owner = null;
if (basenode == null) {
}
else if (basenode.getOwnerDocument() != null) {
owner = basenode.getOwnerDocument();
dtd = owner.getDoctype();
}
else if (basenode instanceof Document) {
owner = (Document) basenode;
dtd = owner.getDoctype();
}
if (basenode instanceof CauchoNode)
systemId = ((CauchoNode) basenode).getBaseURI();
Path pwd = stylesheetPath.getParent();
if (systemId == null && owner instanceof QDocument)
systemId = ((QDocument) owner).getSystemId();
if (systemId == null && dtd != null)
systemId = dtd.getSystemId();
if (systemId == null)
systemId = stylesheetPath.getURL();
Node doc = null;
Source source = null;
if (resolver != null) {
try {
source = resolver.resolve(name, systemId);
} catch (TransformerException e) {
throw new XPathException(e);
}
}
if (source != null) {
systemId = source.getSystemId();
path = pwd.lookup(systemId);
}
else if (systemId != null) {
pwd = pwd.lookup(systemId).getParent();
path = pwd.lookup(name);
}
else
path = pwd.lookup(name);
_transformer.addCacheDepend(path);
if (env instanceof Env)
doc = (Node) ((Env) env).getCache(path);
if (doc != null)
return doc;
try {
if (_isHtml)
doc = new LooseHtml().parseDocument(path);
else
doc = new Xml().parseDocument(path);
} catch (Exception e) {
log.log(Level.FINE, e.toString(), e);
//XXX:throw new XPathException(e);
}
if (env instanceof Env && source == null)
((Env) env).setCache(path, doc);
return doc;
}
}