final String findLocalLibrary(final String name) {
String result = null;
try {
result = (String) searchHooks(name, PRE_LIBRARY);
} catch (FileNotFoundException e) {
return null;
} catch (ClassNotFoundException e) {
// will not happen
}
if (result != null) return result;
result = bundle.getBundleData().findLibrary(name);
if (result != null) return result;
// look in fragments imports ...
BundleFragment[] fragments = bundle.getFragments();
if (fragments != null)
for (int i = 0; i < fragments.length; i++) {
result = fragments[i].getBundleData().findLibrary(name);
if (result != null) return result;
}
try {
return (String) searchHooks(name, POST_LIBRARY);
} catch (FileNotFoundException e) {
return null; // this is not necessary; but being consistent in case another step is added
// below
} catch (ClassNotFoundException e) {
// will not happen
}
return null;
}
public final synchronized BundleClassLoader createClassLoader() {
if (classloader != null) return classloader;
String[] classpath;
try {
classpath = bundle.getBundleData().getClassPath();
} catch (BundleException e) {
// no classpath
classpath = new String[0];
bundle.getFramework().publishFrameworkEvent(FrameworkEvent.ERROR, bundle, e);
}
if (classpath == null) {
// no classpath
classpath = new String[0];
bundle
.getFramework()
.publishFrameworkEvent(
FrameworkEvent.ERROR,
bundle,
new BundleException(Msg.BUNDLE_NO_CLASSPATH_MATCH, BundleException.MANIFEST_ERROR));
}
BundleClassLoader bcl = createBCLPrevileged(bundle.getProtectionDomain(), classpath);
parent = getParentPrivileged(bcl);
classloader = bcl;
return classloader;
}
private Object searchHooks(String name, int type)
throws ClassNotFoundException, FileNotFoundException {
ClassLoaderDelegateHook[] delegateHooks = bundle.getFramework().getDelegateHooks();
if (delegateHooks == null) return null;
Object result = null;
for (int i = 0; i < delegateHooks.length && result == null; i++) {
switch (type) {
case PRE_CLASS:
result = delegateHooks[i].preFindClass(name, createClassLoader(), bundle.getBundleData());
break;
case POST_CLASS:
result =
delegateHooks[i].postFindClass(name, createClassLoader(), bundle.getBundleData());
break;
case PRE_RESOURCE:
result =
delegateHooks[i].preFindResource(name, createClassLoader(), bundle.getBundleData());
break;
case POST_RESOURCE:
result =
delegateHooks[i].postFindResource(name, createClassLoader(), bundle.getBundleData());
break;
case PRE_RESOURCES:
result =
delegateHooks[i].preFindResources(name, createClassLoader(), bundle.getBundleData());
break;
case POST_RESOURCES:
result =
delegateHooks[i].postFindResources(name, createClassLoader(), bundle.getBundleData());
break;
case PRE_LIBRARY:
result =
delegateHooks[i].preFindLibrary(name, createClassLoader(), bundle.getBundleData());
break;
case POST_LIBRARY:
result =
delegateHooks[i].postFindLibrary(name, createClassLoader(), bundle.getBundleData());
break;
}
}
return result;
}
BundleClassLoader createBCL(final BundleProtectionDomain pd, final String[] cp) {
BundleClassLoader bcl = bundle.getBundleData().createClassLoader(BundleLoader.this, pd, cp);
// attach existing fragments to classloader
BundleFragment[] fragments = bundle.getFragments();
if (fragments != null)
for (int i = 0; i < fragments.length; i++) {
try {
bcl.attachFragment(
fragments[i].getBundleData(),
fragments[i].getProtectionDomain(),
fragments[i].getBundleData().getClassPath());
} catch (BundleException be) {
bundle.getFramework().publishFrameworkEvent(FrameworkEvent.ERROR, bundle, be);
}
}
// finish the initialization of the classloader.
bcl.initialize();
return bcl;
}
/**
* Return a string representation of this loader.
*
* @return String
*/
public final String toString() {
BundleData result = bundle.getBundleData();
return result == null ? "BundleLoader.bundledata == null!" : result.toString(); // $NON-NLS-1$
}
/**
* BundleLoader runtime constructor. This object is created lazily when the first request for a
* resource is made to this bundle.
*
* @param bundle Bundle object for this loader.
* @param proxy the BundleLoaderProxy for this loader.
* @exception org.osgi.framework.BundleException
*/
protected BundleLoader(BundleHost bundle, BundleLoaderProxy proxy) throws BundleException {
this.bundle = bundle;
this.proxy = proxy;
try {
bundle.getBundleData().open(); /* make sure the BundleData is open */
} catch (IOException e) {
throw new BundleException(Msg.BUNDLE_READ_EXCEPTION, e);
}
BundleDescription description = proxy.getBundleDescription();
// init the require bundles list.
BundleDescription[] required = description.getResolvedRequires();
if (required.length > 0) {
// get a list of re-exported symbolic names
HashSet reExportSet = new HashSet(required.length);
BundleSpecification[] requiredSpecs = description.getRequiredBundles();
if (requiredSpecs != null && requiredSpecs.length > 0)
for (int i = 0; i < requiredSpecs.length; i++)
if (requiredSpecs[i].isExported()) reExportSet.add(requiredSpecs[i].getName());
requiredBundles = new BundleLoaderProxy[required.length];
int[] reexported = new int[required.length];
int reexportIndex = 0;
for (int i = 0; i < required.length; i++) {
requiredBundles[i] = getLoaderProxy(required[i]);
if (reExportSet.contains(required[i].getSymbolicName())) reexported[reexportIndex++] = i;
}
if (reexportIndex > 0) {
reexportTable = new int[reexportIndex];
System.arraycopy(reexported, 0, reexportTable, 0, reexportIndex);
} else {
reexportTable = null;
}
requiredSources = new KeyedHashSet(10, false);
} else {
requiredBundles = null;
reexportTable = null;
requiredSources = null;
}
// init the provided packages set
ExportPackageDescription[] exports = description.getSelectedExports();
if (exports != null && exports.length > 0) {
exportedPackages =
Collections.synchronizedCollection(
exports.length > 10
? (Collection) new HashSet(exports.length)
: new ArrayList(exports.length));
initializeExports(exports, exportedPackages);
} else {
exportedPackages = Collections.synchronizedCollection(new ArrayList(0));
}
ExportPackageDescription substituted[] = description.getSubstitutedExports();
if (substituted.length > 0) {
substitutedPackages =
substituted.length > 10
? (Collection) new HashSet(substituted.length)
: new ArrayList(substituted.length);
for (int i = 0; i < substituted.length; i++)
substitutedPackages.add(substituted[i].getName());
} else {
substitutedPackages = null;
}
// This is the fastest way to access to the description for fragments since the
// hostdescription.getFragments() is slow
BundleFragment[] fragmentObjects = bundle.getFragments();
BundleDescription[] fragments =
new BundleDescription[fragmentObjects == null ? 0 : fragmentObjects.length];
for (int i = 0; i < fragments.length; i++)
fragments[i] = fragmentObjects[i].getBundleDescription();
// init the dynamic imports tables
if (description.hasDynamicImports()) addDynamicImportPackage(description.getImportPackages());
// ...and its fragments
for (int i = 0; i < fragments.length; i++)
if (fragments[i].isResolved() && fragments[i].hasDynamicImports())
addDynamicImportPackage(fragments[i].getImportPackages());
// Initialize the policy handler
String buddyList = null;
try {
buddyList = (String) bundle.getBundleData().getManifest().get(Constants.BUDDY_LOADER);
} catch (BundleException e) {
// do nothing; buddyList == null
}
policy =
buddyList != null
? new PolicyHandler(this, buddyList, bundle.getFramework().getPackageAdmin())
: null;
if (policy != null) policy.open(bundle.getFramework().getSystemBundleContext());
}
