Repository System

/**
 * Base interface for all repository implementations
 */
public interface RepositoryPlugin extends Plugin {
    /** Get artifact file by bundle symbolic name and version */
    public File get(String bsn, Version version, Map<String,String> properties) throws Exception;
    
    /** List all bundle symbolic names matching regex pattern */
    public List<String> list(String regex) throws Exception;
    
    /** Get all available versions for a bundle symbolic name */
    public SortedSet<Version> versions(String bsn) throws Exception;
    
    /** Get repository name */
    public String getName();
    
    /** Get repository location */
    public String getLocation();
    
    /** Check if repository can write */
    public boolean canWrite();
    
    /** Store artifact in repository */
    public PutResult put(Jar jar, PutOptions options) throws Exception;
    
    /** Get repository tooltip/description */
    public String tooltip(Object... target) throws Exception;
    
    /** Get repository title */
    public String getTitle(Object... target) throws Exception;
}

/**
 * Result of put operation
 */
public class PutResult {
    public File artifact;
    public String digest;
    public boolean isNew;
}

/**
 * Options for put operation
 */
public class PutOptions {
    public boolean allowSnapshots = false;
    public File context;
    public String type;
}

import aQute.bnd.service.RepositoryPlugin;
import aQute.bnd.version.Version;

// Use repository plugin
RepositoryPlugin repo = workspace.getPlugin(RepositoryPlugin.class).get(0);

// List available bundles
List<String> bundles = repo.list("org\\.apache\\..*");
for (String bsn : bundles) {
    System.out.println("Bundle: " + bsn);
    
    // Get available versions
    SortedSet<Version> versions = repo.versions(bsn);
    System.out.println("  Versions: " + versions);
    
    // Get latest version
    if (!versions.isEmpty()) {
        Version latest = versions.last();
        File file = repo.get(bsn, latest, null);
        if (file != null) {
            System.out.println("  Latest: " + file);
        }
    }
}

/**
 * In-memory repository of OSGi resources
 */
public class ResourcesRepository implements Repository {
    /** Create empty repository */
    public ResourcesRepository();
    
    /** Add resource to repository */
    public void add(Resource resource);
    
    /** Add all resources from collection */
    public void addAll(Collection<? extends Resource> resources);
    
    /** Find providers for a requirement */
    public Collection<Capability> findProviders(Requirement requirement);
    
    /** Get all resources */
    public Collection<Resource> getResources();
    
    /** Remove resource */
    public boolean remove(Resource resource);
    
    /** Clear all resources */
    public void clear();
    
    /** Get repository size */
    public int size();
}

/**
 * File-based repository implementation
 */
public class FileRepo implements RepositoryPlugin {
    /** Create file repository at location */
    public FileRepo(String name, File location, boolean readonly);
    
    /** Set repository location */
    public void setLocation(String location);
    
    /** Get repository location */
    public String getLocation();
    
    /** Set readonly flag */
    public void setReadonly(boolean readonly);
    
    /** Check if repository is readonly */
    public boolean isReadonly();
    
    /** Get file for bundle */
    public File get(String bsn, Version version, Map<String,String> properties) throws Exception;
    
    /** Store bundle in repository */
    public PutResult put(Jar jar, PutOptions options) throws Exception;
    
    /** List bundles matching pattern */
    public List<String> list(String regex) throws Exception;
    
    /** Get versions for bundle */
    public SortedSet<Version> versions(String bsn) throws Exception;
    
    /** Refresh repository index */
    public void refresh() throws Exception;
}

import aQute.bnd.service.RepositoryPlugin.PutOptions;
import aQute.bnd.service.RepositoryPlugin.PutResult;

// Create file repository
FileRepo repo = new FileRepo("local", new File("repository"), false);

// Store bundle
Jar bundle = new Jar(new File("mybundle.jar"));
PutOptions options = new PutOptions();
options.allowSnapshots = true;
PutResult result = repo.put(bundle, options);

if (result.isNew) {
    System.out.println("Stored new bundle: " + result.artifact);
} else {
    System.out.println("Bundle already exists: " + result.artifact);
}

// Retrieve bundle
File retrieved = repo.get("com.example.mybundle", 
    Version.parseVersion("1.0.0"), null);
if (retrieved != null) {
    System.out.println("Retrieved: " + retrieved);
}

/**
 * Creates repository indexes from bundle collections
 */
public class SimpleIndexer {
    /** Index bundles to output stream */
    public static void index(Set<File> bundles, OutputStream out, 
                           Map<String,String> config) throws Exception;
    
    /** Index single bundle */
    public static Resource indexBundle(File bundle) throws Exception;
    
    /** Create index from directory */
    public static void indexDirectory(File directory, OutputStream out) throws Exception;
}

/**
 * Repository index reader
 */
public class RepositoryIndexReader {
    /** Read index from stream */
    public static Collection<Resource> readIndex(InputStream in) throws Exception;
    
    /** Read index from file */
    public static Collection<Resource> readIndex(File indexFile) throws Exception;
    
    /** Parse index XML */
    public static Repository parseIndex(InputStream in) throws Exception;
}

/**
 * HTTP-based remote repository
 */
public class HttpRepository implements RepositoryPlugin {
    /** Create HTTP repository */
    public HttpRepository(String name, String url);
    
    /** Set repository URL */
    public void setUrl(String url);
    
    /** Get repository URL */
    public String getUrl();
    
    /** Set authentication credentials */
    public void setCredentials(String username, String password);
    
    /** Set connection timeout */
    public void setTimeout(int timeoutMs);
    
    /** Enable/disable caching */
    public void setCaching(boolean enabled);
    
    /** Set cache directory */
    public void setCacheDir(File cacheDir);
    
    /** Download bundle */
    public File get(String bsn, Version version, Map<String,String> properties) throws Exception;
    
    /** Get remote index */
    public Repository getIndex() throws Exception;
}

/**
 * Maven repository integration
 */
public class MavenRepository implements RepositoryPlugin {
    /** Create Maven repository */
    public MavenRepository(String name, String url);
    
    /** Set Maven repository URL */
    public void setUrl(String url);
    
    /** Set local repository location */
    public void setLocal(File localRepo);
    
    /** Resolve Maven artifact */
    public File get(String bsn, Version version, Map<String,String> properties) throws Exception;
    
    /** Convert OSGi coordinates to Maven */
    public MavenCoordinate toMavenCoordinate(String bsn, Version version);
    
    /** Convert Maven coordinate to OSGi */
    public BundleCoordinate toBundleCoordinate(MavenCoordinate coord);
}

/**
 * Maven artifact coordinates
 */
public class MavenCoordinate {
    public String groupId;
    public String artifactId;
    public String version;
    public String classifier;
    public String type;
    
    public String toString(); // groupId:artifactId:version[:classifier][@type]
}

/**
 * OSGi bundle coordinates
 */
public class BundleCoordinate {
    public String bundleSymbolicName;
    public Version version;
    
    public String toString(); // bsn;version=version
}

import aQute.bnd.service.RepositoryPlugin;
import aQute.bnd.osgi.repository.ResourcesRepository;
import aQute.lib.deployer.FileRepo;

// Complete repository system usage
public class RepositoryExample {
    
    public void demonstrateRepositorySystem() throws Exception {
        // Create different repository types
        FileRepo localRepo = new FileRepo("local", new File("local-repo"), false);
        HttpRepository centralRepo = new HttpRepository("central", 
            "https://repo1.maven.org/maven2");
        MavenRepository mavenRepo = new MavenRepository("maven-central",
            "https://repo1.maven.org/maven2");
        
        // Store bundle in local repository
        Jar myBundle = createBundle();
        PutOptions options = new PutOptions();
        options.allowSnapshots = true;
        
        PutResult result = localRepo.put(myBundle, options);
        System.out.println("Stored: " + result.artifact);
        
        // Search across repositories
        String[] repositories = {"local", "central", "maven-central"};
        String targetBundle = "org.apache.commons.lang3";
        
        for (String repoName : repositories) {
            RepositoryPlugin repo = getRepository(repoName);
            
            // List available versions
            SortedSet<Version> versions = repo.versions(targetBundle);
            if (!versions.isEmpty()) {
                System.out.println(repoName + " has " + targetBundle + 
                                 " versions: " + versions);
                
                // Get latest version
                Version latest = versions.last();
                File bundle = repo.get(targetBundle, latest, null);
                if (bundle != null) {
                    System.out.println("Downloaded: " + bundle);
                    
                    // Analyze downloaded bundle
                    analyzeBundle(bundle);
                }
                break; // Found it, stop searching
            }
        }
        
        // Create in-memory repository for resolution
        ResourcesRepository memRepo = new ResourcesRepository();
        
        // Add resources to memory repository
        memRepo.add(createResourceFromBundle(myBundle));
        
        // Find providers for requirements
        Requirement requirement = createRequirement("osgi.wiring.package", 
            "com.example.api");
        Collection<Capability> providers = memRepo.findProviders(requirement);
        
        System.out.println("Providers for requirement: " + providers.size());
        
        // Create repository index
        Set<File> bundles = new HashSet<>();
        bundles.add(new File("bundle1.jar"));
        bundles.add(new File("bundle2.jar"));
        
        try (FileOutputStream indexOut = new FileOutputStream("repository.xml")) {
            SimpleIndexer.index(bundles, indexOut, Collections.emptyMap());
        }
        
        System.out.println("Created repository index");
    }
    
    private Jar createBundle() throws Exception {
        // Implementation to create a sample bundle
        Jar jar = new Jar("example");
        // ... add content
        return jar;
    }
    
    private RepositoryPlugin getRepository(String name) {
        // Implementation to get repository by name
        return null;
    }
    
    private void analyzeBundle(File bundle) throws Exception {
        try (Jar jar = new Jar(bundle)) {
            System.out.println("  Bundle-SymbolicName: " + jar.getBsn());
            System.out.println("  Bundle-Version: " + jar.getVersion());
        }
    }
    
    private Resource createResourceFromBundle(Jar bundle) throws Exception {
        // Convert bundle to OSGi resource
        return null;
    }
    
    private Requirement createRequirement(String namespace, String name) {
        // Create OSGi requirement
        return null;
    }
}