/**
* Returns existing compiled Templates if it exists.
*
* @param systemId source path for the stylesheet.
* @return a compiled stylesheet
*/
StylesheetImpl loadPrecompiledStylesheet(String systemId, String userId, boolean checkModified) {
if (!_loadPrecompiledStylesheet) return null;
try {
// look for compiled template base on SystemID
StylesheetImpl stylesheet = loadStylesheet(systemId, getMangledName(userId));
if (stylesheet == null) return null;
stylesheet.setURIResolver(_uriResolver);
// and check if it's modified or not
if (!checkModified || !stylesheet.isModified()) {
stylesheet.setURIResolver(_uriResolver);
return stylesheet;
}
} catch (Throwable e) {
log.log(Level.FINER, e.toString(), e);
}
return null;
}
/**
* Loads the compiled stylesheet .class file
*
* @param className the mangled classname for the stylesheet
*/
protected StylesheetImpl loadStylesheet(String systemId, String className) throws Exception {
LruCache<String, SoftReference<StylesheetImpl>> cache;
ClassLoader parentLoader = Thread.currentThread().getContextClassLoader();
cache = _stylesheetCache.getLevel(parentLoader);
if (cache == null) {
cache = new LruCache<String, SoftReference<StylesheetImpl>>(256);
_stylesheetCache.set(cache, parentLoader);
}
SoftReference<StylesheetImpl> stylesheetRef;
stylesheetRef = cache.get(className);
StylesheetImpl stylesheet = null;
if (stylesheetRef != null) stylesheet = stylesheetRef.get();
try {
if (stylesheet != null && !stylesheet.isModified()) return stylesheet;
} catch (Throwable e) {
log.log(Level.FINER, e.toString(), e);
}
Path classPath = getWorkPath().lookup(className.replace('.', '/') + ".class");
if (!classPath.canRead())
throw new ClassNotFoundException("can't find compiled XSL `" + className + "'");
DynamicClassLoader loader;
loader = SimpleLoader.create(parentLoader, getWorkPath(), className);
Class cl = null;
// If the loading fails, remove the class because it may be corrupted
try {
cl = CauchoSystem.loadClass(className, false, loader);
} catch (Error e) {
try {
classPath.remove();
} catch (IOException e1) {
log.log(Level.FINE, e1.toString(), e1);
}
throw e;
}
stylesheet = (StylesheetImpl) cl.newInstance();
Path path;
path = getSearchPath().lookup("").lookup(systemId);
/*
try {
} catch (TransformerException e) {
log.log(Level.FINE, e.toString(), e);
path = Vfs.lookup(systemId);
}
*/
// stylesheet.init(path);
stylesheet.init(getStylePath());
stylesheet.setURIResolver(_uriResolver);
stylesheetRef = new SoftReference<StylesheetImpl>(stylesheet);
cache.put(className, stylesheetRef);
return stylesheet;
}
/**
* Generates a compiled stylesheet from a parsed XSL document.
*
* @param xsl the parsed xsl document.
* @param path the path to the document.
*/
Templates generate(Node xsl, Path path) throws TransformerConfigurationException {
log.fine("Generating XSL from " + path);
// The code generation needs a static lock because the
// application might have a separate factory object
// for each thread. The static lock protects the code generation
// from overwriting its own code.
synchronized (AbstractStylesheetFactory.class) {
Generator gen = null;
try {
if (path == null && xsl != null) {
Document doc = xsl.getOwnerDocument();
if (doc == null && xsl instanceof Document) doc = (Document) xsl;
DocumentType dtd = doc.getDoctype();
String systemId = null;
if (dtd != null) systemId = dtd.getSystemId();
if (systemId != null) path = getStylePath().lookup(systemId);
}
if (path == null && xsl instanceof CauchoNode) {
String filename = ((CauchoNode) xsl).getFilename();
if (filename != null) path = getStylePath().lookup(filename);
}
if (path == null) path = getStylePath().lookup("anonymous.xsl");
Path stylePath = path.getParent();
Expr expr = XPath.parseExpr("//xtp:directive.page/@language");
String language = expr.evalString(xsl);
String userName = path.getUserPath();
String mangledName = getMangledName(userName);
String encoding = XPath.evalString("//xsl:output/@encoding", xsl);
if (encoding != null && encoding.equals("")) encoding = null;
if (language == null || language.equals("") || language.equals("java")) {
language = "java";
gen = new JavaGenerator(this, mangledName, encoding);
} else throw new XslParseException(L.l("unsupported language `{0}'", language));
gen.setPath(path);
Iterator iter = XPath.select("//xtp:directive.page/@*", xsl);
while (iter.hasNext()) {
Attr attr = (Attr) iter.next();
String name = attr.getNodeName();
String value = attr.getNodeValue();
if (name.equals("errorPage")) gen.setErrorPage(value);
else if (name.equals("import")) gen.addImport(value);
else if (name.equals("contentType")) gen.setContentType(value);
else if (name.equals("language")) {
if (!language.equalsIgnoreCase(value))
throw new XslParseException(L.l("mismatched language `{0}'", value));
} else if (name.equals("xml:space")) {
} else throw new XslParseException(L.l("unknown directive `{0}'", name));
}
StylesheetImpl stylesheet = gen.generate(xsl);
gen = null;
stylesheet.init(path);
// XXX: why was this here? stylesheet.init(getStylePath());
stylesheet.setURIResolver(_uriResolver);
return stylesheet;
} catch (TransformerConfigurationException e) {
throw e;
} catch (Exception e) {
throw new XslParseException(e);
} finally {
try {
if (gen != null) gen.close();
} catch (IOException e) {
}
}
}
}
