/**
* Retrieves IG rules from provided input files.
*
* @param files A collection of input files from which rules will be retrieved.
* @param mappings {@link Map} of pairs (extension - processor). Extension is a lowercase file
* extension (e.g. "dtd"), processor is the {@link Processor} responsible for this file type.
* If <code>mappings</code> contain the key "*", will the associated processor handle all file
* types.
* @return List of IG rules. Empty, if there are no input files or an error occurs.
*/
private static List<Element> getRulesFromInput(
final Collection<File> files, final Map<String, Processor<Element>> mappings)
throws InterruptedException {
if (BaseUtils.isEmpty(files)) {
return new ArrayList<Element>(0);
}
final List<Element> ret = new ArrayList<Element>();
for (final File f : files) {
if (Thread.interrupted()) {
throw new InterruptedException();
}
try {
final Processor<Element> p =
getProcessorForExtension(FileUtils.getExtension(f.getAbsolutePath()), mappings);
if (p != null) {
final List<Element> rules = p.process(new FileInputStream(f));
for (final Element rule : rules) {
rule.getMetadata().put(IGGUtils.FILE_ORIGIN, f.getAbsoluteFile());
}
ret.addAll(rules);
} else {
// TODO rio This is a hack to not print errors that XQuery files do not
// have defined mapping.
if (!FileUtils.getExtension(f.getAbsolutePath()).equals("xq")) {
LOG.error(
"File extension does not have a corresponding mapping: " + f.getAbsolutePath());
}
}
} catch (final FileNotFoundException e) {
throw new RuntimeException("File not found: " + f.getAbsolutePath(), e);
}
}
return ret;
}
/**
* Processes files with XQuery queries by supplying them to the specified processor. Result is a
* list of respective syntax trees.
*/
private List<ModuleNode> processXQueries(
final Collection<File> files, final Processor<ModuleNode> xqueryProcessor)
throws InterruptedException {
if (BaseUtils.isEmpty(files) || xqueryProcessor == null) {
return new ArrayList<ModuleNode>(0);
}
final List<ModuleNode> ret = new ArrayList<ModuleNode>();
for (final File f : files) {
if (Thread.interrupted()) {
throw new InterruptedException();
}
try {
if (FileUtils.getExtension(f.getAbsolutePath()).equals(xqueryProcessor.getExtension())) {
/* TODO rio Interface of input processor requires List as a return type
* but our XQuery processor returns only one syntax tree per file. So
* it is at index 0. An empty list indicates parsing error.
*/
final List<ModuleNode> syntaxTree = xqueryProcessor.process(new FileInputStream(f));
if (syntaxTree.size() > 0) {
assert (syntaxTree.size() == 1);
ret.add(syntaxTree.get(0));
} else {
LOG.error(
"Error in XQuery file "
+ f.getAbsolutePath()
+ ". Try to strip it of empty lines and comments."); // TODO rio Fix weird
// parsing errors.
}
}
} catch (final FileNotFoundException e) {
throw new RuntimeException("File not found: " + f.getAbsolutePath(), e);
}
}
return ret;
}