private PackageSource findRequiredSource(String pkgName, KeyedHashSet visited) {
if (requiredBundles == null) return null;
synchronized (requiredSources) {
PackageSource result = (PackageSource) requiredSources.getByKey(pkgName);
if (result != null) return result.isNullSource() ? null : result;
}
if (visited == null) visited = new KeyedHashSet(false);
visited.add(bundle); // always add ourselves so we do not recurse back to ourselves
ArrayList result = new ArrayList(3);
for (int i = 0; i < requiredBundles.length; i++) {
BundleLoader requiredLoader = requiredBundles[i].getBundleLoader();
requiredLoader.addExportedProvidersFor(proxy.getSymbolicName(), pkgName, result, visited);
}
// found some so cache the result for next time and return
PackageSource source;
if (result.size() == 0) {
// did not find it in our required bundles lets record the failure
// so we do not have to do the search again for this package.
source = NullPackageSource.getNullPackageSource(pkgName);
} else if (result.size() == 1) {
// if there is just one source, remember just the single source
source = (PackageSource) result.get(0);
} else {
// if there was more than one source, build a multisource and cache that.
PackageSource[] srcs = (PackageSource[]) result.toArray(new PackageSource[result.size()]);
source = createMultiSource(pkgName, srcs);
}
synchronized (requiredSources) {
requiredSources.add(source);
}
return source.isNullSource() ? null : source;
}
/**
* Adds a list of DynamicImport-Package manifest elements to the dynamic import tables of this
* BundleLoader. Duplicate packages are checked and not added again.
*
* @param packages the DynamicImport-Package elements to add.
*/
public final synchronized void addDynamicImportPackage(ManifestElement[] packages) {
if (packages == null) return;
ArrayList dynamicImports = new ArrayList(packages.length);
for (int i = 0; i < packages.length; i++) dynamicImports.add(packages[i].getValue());
if (dynamicImports.size() > 0)
addDynamicImportPackage((String[]) dynamicImports.toArray(new String[dynamicImports.size()]));
}
/**
* Adds a list of DynamicImport-Package manifest elements to the dynamic import tables of this
* BundleLoader. Duplicate packages are checked and not added again. This method is not thread
* safe. Callers should ensure synchronization when calling this method.
*
* @param packages the DynamicImport-Package elements to add.
*/
private void addDynamicImportPackage(String[] packages) {
if (packages == null) return;
loaderFlags |= FLAG_HASDYNAMICIMPORTS;
int size = packages.length;
ArrayList stems;
if (dynamicImportPackageStems == null) {
stems = new ArrayList(size);
} else {
stems = new ArrayList(size + dynamicImportPackageStems.length);
for (int i = 0; i < dynamicImportPackageStems.length; i++) {
stems.add(dynamicImportPackageStems[i]);
}
}
ArrayList names;
if (dynamicImportPackages == null) {
names = new ArrayList(size);
} else {
names = new ArrayList(size + dynamicImportPackages.length);
for (int i = 0; i < dynamicImportPackages.length; i++) {
names.add(dynamicImportPackages[i]);
}
}
for (int i = 0; i < size; i++) {
String name = packages[i];
if (isDynamicallyImported(name)) continue;
if (name.equals("*")) {
/* shortcut */
//$NON-NLS-1$
loaderFlags |= FLAG_HASDYNAMICEIMPORTALL;
return;
}
if (name.endsWith(".*")) // $NON-NLS-1$
stems.add(name.substring(0, name.length() - 1));
else names.add(name);
}
size = stems.size();
if (size > 0) dynamicImportPackageStems = (String[]) stems.toArray(new String[size]);
size = names.size();
if (size > 0) dynamicImportPackages = (String[]) names.toArray(new String[size]);
}
private void addDynamicImportPackage(ImportPackageSpecification[] packages) {
if (packages == null) return;
ArrayList dynamicImports = new ArrayList(packages.length);
for (int i = 0; i < packages.length; i++)
if (ImportPackageSpecification.RESOLUTION_DYNAMIC.equals(
packages[i].getDirective(Constants.RESOLUTION_DIRECTIVE)))
dynamicImports.add(packages[i].getName());
if (dynamicImports.size() > 0)
addDynamicImportPackage((String[]) dynamicImports.toArray(new String[dynamicImports.size()]));
}
private static PackageSource createMultiSource(String packageName, PackageSource[] sources) {
if (sources.length == 1) return sources[0];
ArrayList sourceList = new ArrayList(sources.length);
for (int i = 0; i < sources.length; i++) {
SingleSourcePackage[] innerSources = sources[i].getSuppliers();
for (int j = 0; j < innerSources.length; j++)
if (!sourceList.contains(innerSources[j])) sourceList.add(innerSources[j]);
}
return new MultiSourcePackage(
packageName,
(SingleSourcePackage[]) sourceList.toArray(new SingleSourcePackage[sourceList.size()]));
}