public PackagePathCache(
ImmutableSet<IjFolder> startingFolders, JavaPackageFinder javaPackageFinder) {
delegate = new ParsingJavaPackageFinder.PackagePathCache();
for (IjFolder startingFolder : startingFolders) {
if (!startingFolder.getWantsPackagePrefix()) {
continue;
}
Path path =
FluentIterable.from(startingFolder.getInputs()).first().or(lookupPath(startingFolder));
delegate.insert(path, javaPackageFinder.findJavaPackageFolder(path));
}
}
@Nullable
private String getPackagPrefix(IjFolder folder) {
if (!folder.getWantsPackagePrefix()) {
return null;
}
Path fileToLookupPackageIn;
if (!folder.getInputs().isEmpty()
&& folder.getInputs().first().getParent().equals(folder.getPath())) {
fileToLookupPackageIn = folder.getInputs().first();
} else {
fileToLookupPackageIn = folder.getPath().resolve("notfound");
}
String packagePrefix = javaPackageFinder.findJavaPackage(fileToLookupPackageIn);
if (packagePrefix.isEmpty()) {
// It doesn't matter either way, but an empty prefix looks confusing.
return null;
}
return packagePrefix;
}