public static RequestContextBean parseConfigFile(ExternalContext externalContext) {
RequestContextBean bean = new RequestContextBean();
InputStream in = externalContext.getResourceAsStream(_CONFIG_FILE);
if (in != null) {
try {
InputSource input = new InputSource();
input.setByteStream(in);
input.setPublicId(_CONFIG_FILE);
XMLReader reader = _SAX_PARSER_FACTORY.newSAXParser().getXMLReader();
reader.setContentHandler(new Handler(bean, externalContext));
reader.parse(input);
} catch (IOException ioe) {
_LOG.warning(ioe);
} catch (ParserConfigurationException pce) {
_LOG.warning(pce);
} catch (SAXException saxe) {
_LOG.warning(saxe);
} finally {
try {
in.close();
} catch (IOException ioe) {
// Ignore
;
}
}
}
String classNameString =
(String) bean.getProperty(RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY);
if (classNameString != null) {
classNameString = classNameString.trim();
// check if this contains multiple class names for chained processors usecase.
// Usually the class named are separated by space char.
String classNames[] = classNameString.split("[ ]+");
if (classNames.length == 1) {
// This could be a single processor full override usecase or a chained
// processor usecase that has only one processor.
try {
Class<UploadedFileProcessor> clazz =
(Class<UploadedFileProcessor>) ClassLoaderUtils.loadClass(classNames[0]);
if (ChainedUploadedFileProcessor.class.isAssignableFrom(clazz)) {
// this single chained processor case
ChainedUploadedFileProcessor cufp[] = {
(ChainedUploadedFileProcessor) clazz.newInstance()
};
bean.setProperty(
RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY,
new CompositeUploadedFileProcessorImpl(Arrays.asList(cufp)));
} else {
// this is full override usecase
bean.setProperty(RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY, clazz.newInstance());
}
} catch (Exception e) {
_LOG.severe("CANNOT_INSTANTIATE_UPLOADEDFILEPROCESSOR", e);
bean.setProperty(
RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY,
new CompositeUploadedFileProcessorImpl());
}
} else {
try {
// chained processors usecase, Multiple processors
List<ChainedUploadedFileProcessor> processors =
new ArrayList<ChainedUploadedFileProcessor>(classNames.length);
for (String className : classNames) {
Class<ChainedUploadedFileProcessor> clazz =
(Class<ChainedUploadedFileProcessor>) ClassLoaderUtils.loadClass(className);
processors.add(clazz.newInstance());
}
bean.setProperty(
RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY,
new CompositeUploadedFileProcessorImpl(processors));
} catch (Exception e) {
_LOG.severe("CANNOT_INSTANTIATE_UPLOADEDFILEPROCESSOR", e);
bean.setProperty(
RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY,
new CompositeUploadedFileProcessorImpl());
}
}
} else {
// nothing specified, hence use default.
bean.setProperty(
RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY, new CompositeUploadedFileProcessorImpl());
}
UploadedFileProcessor ufp =
(UploadedFileProcessor) bean.getProperty(RequestContextBean.UPLOADED_FILE_PROCESSOR_KEY);
ufp.init(externalContext.getContext());
if (_LOG.isInfo()) {
Object debug = bean.getProperty(RequestContextBean.DEBUG_OUTPUT_KEY);
if (Boolean.TRUE.equals(debug)) _LOG.info("RUNNING_IN_DEBUG_MODE", _CONFIG_FILE);
}
return bean;
}
