/**
* Checks package descriptor and if packages involved in dependencies are already installed.
*
* @param pkg package
* @throws QueryException query exception
*/
public void check(final Package pkg) throws QueryException {
// check if package is already installed
final byte[] name = pkg.uniqueName();
if (repo.pkgDict().get(name) != null) PKGINST.thrw(input, name);
// check package dependencies
checkDepends(pkg);
// check package components
checkComps(pkg);
}
/**
* Checks if an XQuery component is already installed as part of another package.
*
* @param comp component
* @param name component's package
* @return result
* @throws QueryException query exception
*/
private boolean isInstalled(final Component comp, final byte[] name) throws QueryException {
// get packages in which the module's namespace is found
final TokenSet pkgs = repo.nsDict().get(comp.uri);
if (pkgs == null) return false;
for (final byte[] nextPkg : pkgs) {
if (nextPkg != null && !eq(Package.name(nextPkg), name)) {
// installed package is a different one, not just a different version
// of the current one
final String pkgDir = string(repo.pkgDict().get(nextPkg));
final IO pkgDesc = new IOFile(repo.path(pkgDir), DESCRIPTOR);
final Package pkg = new PkgParser(repo, input).parse(pkgDesc);
for (final Component nextComp : pkg.comps) {
if (nextComp.name().equals(comp.name())) return true;
}
}
}
return false;
}