AdminCacheUtils.java

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package com.sun.enterprise.admin.util.cache;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
import org.jvnet.hk2.annotations.Service;

/** Tooling for AdminCache {@link DataProvider} implementation.
 *
 * @author mmares
 */
@Service
public class AdminCacheUtils {
    
    private static final AdminCacheUtils instance = new AdminCacheUtils();
    
    private final Map<Class, DataProvider> providers = new HashMap<Class, DataProvider>();
    private final Pattern keyPattern = Pattern.compile("([-_.a-zA-Z0-9]+/?)+");
    //private final ServiceLoader<DataProvider> dataProviderLoader = ServiceLoader.<DataProvider>load(DataProvider.class);
    
    private static final DataProvider[] allProviders = new DataProvider[]{
        new StringDataProvider(), 
        new ByteArrayDataProvider(),
        new CommandModelDataProvider()
    };
    
    private AdminCacheUtils() {
    }
    
    public DataProvider getProvider(final Class clazz) {
        DataProvider result = providers.get(clazz);
        if (result == null) {
            //Use hardcoded data providers - fastest and not problematic
            for (DataProvider provider : allProviders) {
                if (provider.accept(clazz)) {
                    providers.put(clazz, provider);
                    return provider;
                }
            }
//            ServiceLocator habitat = Globals.getDefaultHabitat();
//            if (habitat != null) {
//                List<DataProvider> allServices = habitat.getAllServices(DataProvider.class);
//                for (DataProvider provider : allServices) {
//                    if (provider.accept(clazz)) {
//                        providers.put(clazz, provider);
//                        return provider;
//                    }
//                }
//            }
//            for (DataProvider provider : dataProviderLoader) {
//                if (provider.accept(clazz)) {
//                    providers.put(clazz, provider);
//                    return provider;
//                }
//            }
            
            return null;
        } else {
            return result;
        }
    }
    
    public final boolean validateKey(final String key) {
        return keyPattern.matcher(key).matches();
    }
    
    /** Return preferred {@link AdminCache}
     */
    public static AdminCache getCache() {
        return AdminCacheMemStore.getInstance();
    }
    
    public static AdminCacheUtils getInstance() {
        return instance;
    }
    
}