Examples with ParentClassDescriptor org.apache.drill.common.scanner.persistence.ParentClassDescriptor used on opensource projects

Example 1 with ParentClassDescriptor

use of org.apache.drill.common.scanner.persistence.ParentClassDescriptor in project drill by apache.

the class ClassPathScanner method scan.

/**
   *
   * @param pathsToScan the locations to scan for .class files
   * @param packagePrefixes the whitelist of package prefixes to scan
   * @param parentResult if there was a prescan, its result
   * @return the merged scan
   */
static ScanResult scan(Collection<URL> pathsToScan, Collection<String> packagePrefixes, Collection<String> scannedClasses, Collection<String> scannedAnnotations, ScanResult parentResult) {
    Stopwatch watch = Stopwatch.createStarted();
    try {
        AnnotationScanner annotationScanner = new AnnotationScanner(scannedAnnotations);
        SubTypesScanner subTypesScanner = new SubTypesScanner(parentResult.getImplementations());
        if (packagePrefixes.size() > 0) {
            final FilterBuilder filter = new FilterBuilder();
            for (String prefix : packagePrefixes) {
                filter.include(FilterBuilder.prefix(prefix));
            }
            ConfigurationBuilder conf = new ConfigurationBuilder().setUrls(pathsToScan).setMetadataAdapter(// Scanners depend on this
            METADATA_ADAPTER).filterInputsBy(filter).setScanners(annotationScanner, subTypesScanner);
            // scans stuff, but don't use the funky storage layer
            new Reflections(conf);
        }
        List<ParentClassDescriptor> implementations = new ArrayList<>();
        for (String baseTypeName : scannedClasses) {
            implementations.add(new ParentClassDescriptor(baseTypeName, new ArrayList<>(subTypesScanner.getChildrenOf(baseTypeName))));
        }
        List<AnnotatedClassDescriptor> annotated = annotationScanner.getAnnotatedClasses();
        verifyClassUnicity(annotated, pathsToScan);
        return new ScanResult(packagePrefixes, scannedClasses, scannedAnnotations, annotated, implementations);
    } finally {
        logger.info(format("Scanning packages %s in locations %s took %dms", packagePrefixes, pathsToScan, watch.elapsed(MILLISECONDS)));
    }
}