578 return manifests.get(fn);
579 }
580
581 // The map of loaded system packages
582 private static final ConcurrentHashMap<String, Package> pkgs
583 = new ConcurrentHashMap<>();
584
585 // Maps each directory or zip file name to its corresponding manifest, if
586 // it exists
587 private static final ConcurrentHashMap<String, CachedManifest> manifests
588 = new ConcurrentHashMap<>();
589
590 private static class CachedManifest {
591 private static final Manifest EMPTY_MANIFEST = new Manifest();
592 private final String fileName;
593 private final URL url;
594 private volatile Manifest manifest;
595
596 CachedManifest(final String fileName) {
597 this.fileName = fileName;
598 this.url = AccessController.doPrivileged(new PrivilegedAction<URL>() {
599 public URL run() {
600 final File file = new File(fileName);
601 if (file.isFile()) {
602 try {
603 return ParseUtil.fileToEncodedURL(file);
604 } catch (MalformedURLException e) {
605 }
606 }
607 return null;
608 }
609 });
610 }
611
612 public URL getURL() {
613 return url;
614 }
615
616 public Manifest getManifest() {
617 if (url == null) {
618 return EMPTY_MANIFEST;
619 }
620 Manifest m = manifest;
621 if (m != null) {
622 return m;
623 }
624 synchronized (this) {
625 m = manifest;
626 if (m != null) {
627 return m;
628 }
629 m = AccessController.doPrivileged(new PrivilegedAction<Manifest>() {
630 public Manifest run() {
631 try (FileInputStream fis = new FileInputStream(fileName);
632 JarInputStream jis = new JarInputStream(fis, false)) {
633 return jis.getManifest();
634 } catch (IOException e) {
635 return null;
636 }
637 }
638 });
639 manifest = m = (m == null ? EMPTY_MANIFEST : m);
640 }
641 return m;
642 }
643 }
644
645 private static native String getSystemPackage0(String name);
646 private static native String[] getSystemPackages0();
647
648 /*
649 * Private storage for the package name and attributes.
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578 return manifests.get(fn);
579 }
580
581 // The map of loaded system packages
582 private static final ConcurrentHashMap<String, Package> pkgs
583 = new ConcurrentHashMap<>();
584
585 // Maps each directory or zip file name to its corresponding manifest, if
586 // it exists
587 private static final ConcurrentHashMap<String, CachedManifest> manifests
588 = new ConcurrentHashMap<>();
589
590 private static class CachedManifest {
591 private static final Manifest EMPTY_MANIFEST = new Manifest();
592 private final String fileName;
593 private final URL url;
594 private volatile Manifest manifest;
595
596 CachedManifest(final String fileName) {
597 this.fileName = fileName;
598 this.url = AccessController.doPrivileged(new PrivilegedAction<>() {
599 public URL run() {
600 final File file = new File(fileName);
601 if (file.isFile()) {
602 try {
603 return ParseUtil.fileToEncodedURL(file);
604 } catch (MalformedURLException e) {
605 }
606 }
607 return null;
608 }
609 });
610 }
611
612 public URL getURL() {
613 return url;
614 }
615
616 public Manifest getManifest() {
617 if (url == null) {
618 return EMPTY_MANIFEST;
619 }
620 Manifest m = manifest;
621 if (m != null) {
622 return m;
623 }
624 synchronized (this) {
625 m = manifest;
626 if (m != null) {
627 return m;
628 }
629 m = AccessController.doPrivileged(new PrivilegedAction<>() {
630 public Manifest run() {
631 try (FileInputStream fis = new FileInputStream(fileName);
632 JarInputStream jis = new JarInputStream(fis, false)) {
633 return jis.getManifest();
634 } catch (IOException e) {
635 return null;
636 }
637 }
638 });
639 manifest = m = (m == null ? EMPTY_MANIFEST : m);
640 }
641 return m;
642 }
643 }
644
645 private static native String getSystemPackage0(String name);
646 private static native String[] getSystemPackages0();
647
648 /*
649 * Private storage for the package name and attributes.
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