/**
* Constructs a store from a given file. The file should be a JAR or ZIP file containing a single
* subdirectory with extension {@link FileType#GRAMMAR}. The store is immutable.
*
* @param file source JAR or ZIP file containing the rule system
* @throws IllegalArgumentException if <code>file</code> is not a correct archive
*/
public DefaultArchiveSystemStore(File file) throws IllegalArgumentException {
if (!file.exists()) {
throw new IllegalArgumentException(String.format("File '%s' does not exist", file));
}
String extendedName;
if (!file.isDirectory() && JAR.hasExtension(file)) {
extendedName = JAR.stripExtension(file.getName());
} else if (!file.isDirectory() && ZIP.hasExtension(file)) {
extendedName = ZIP.stripExtension(file.getName());
} else {
throw new IllegalArgumentException(String.format("File '%s' " + NO_JAR_OR_ZIP_SUFFIX, file));
}
this.location = file.toString();
this.file = file;
this.entryName = extendedName;
this.grammarName = GRAMMAR.stripExtension(extendedName);
this.url = null;
}
/**
* Constructs a store from a given URL. The URL should either specify the <code>jar:</code>
* protocol, in which case the sub-URL should point to a JAR or ZIP file; or the URL should itself
* specify a JAR or ZIP file. Query and reference part of the URL are ignored. The store is
* immutable.
*
* @param url source location of the underlying persistent storage; should refer to a ZIP or JAR
* file.
* @throws IllegalArgumentException if <code>location</code> does not specify the correct protocol
* @throws IOException if the URL has the JAR protocol, but cannot be opened
*/
public DefaultArchiveSystemStore(URL url) throws IllegalArgumentException, IOException {
// first strip query and anchor part
try {
url = new URL(url.getProtocol(), url.getAuthority(), url.getPath());
} catch (MalformedURLException exc) {
assert false : String.format("Stripping URL '%s' throws exception: %s", url, exc);
}
this.location = url.toString();
// artificially append the jar protocol, if it is not yet there
if (!url.getProtocol().equals(JAR_PROTOCOL)) {
if (!JAR.hasExtension(url.getPath()) && !ZIP.hasExtension(url.getPath())) {
throw new IllegalArgumentException(String.format("URL '%s' is not a JAR or ZIP file", url));
}
url = new URL(JAR_PROTOCOL, null, url.toString() + "!/");
}
this.entryName = extractEntryName(url);
// take the last part of the entry name as grammar name
File fileFromEntry = new File(this.entryName);
this.grammarName = GRAMMAR.stripExtension(fileFromEntry.getName());
this.url = url;
this.file = null;
}