private static final StoreManager getStorageManager(Configuration storageConfig) {
String clazzname =
storageConfig.getString(
GraphDatabaseConfiguration.STORAGE_BACKEND_KEY,
GraphDatabaseConfiguration.STORAGE_BACKEND_DEFAULT);
if (preregisteredStorageManagers.containsKey(clazzname.toLowerCase())) {
clazzname = preregisteredStorageManagers.get(clazzname.toLowerCase()).getCanonicalName();
}
try {
Class clazz = Class.forName(clazzname);
Constructor constructor = clazz.getConstructor(Configuration.class);
StoreManager storage = (StoreManager) constructor.newInstance(storageConfig);
return storage;
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Could not find storage manager class" + clazzname);
} catch (NoSuchMethodException e) {
throw new IllegalArgumentException(
"Configured storage manager does not have required constructor: " + clazzname);
} catch (InstantiationException e) {
throw new IllegalArgumentException(
"Could not instantiate storage manager class " + clazzname, e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(
"Could not instantiate storage manager class " + clazzname, e);
} catch (InvocationTargetException e) {
throw new IllegalArgumentException(
"Could not instantiate storage manager class " + clazzname, e);
} catch (ClassCastException e) {
throw new IllegalArgumentException(
"Could not instantiate storage manager class " + clazzname, e);
}
}
public static final <T> T instantiate(String clazzname, Object... constructorArgs) {
try {
Class clazz = Class.forName(clazzname);
Constructor constructor = clazz.getConstructor(Configuration.class);
T instance = (T) constructor.newInstance(constructorArgs);
return instance;
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Could not find implementation class: " + clazzname);
} catch (NoSuchMethodException e) {
throw new IllegalArgumentException(
"Configured backend implementation does not have required constructor: " + clazzname);
} catch (InstantiationException e) {
throw new IllegalArgumentException("Could not instantiate implementation: " + clazzname, e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("Could not instantiate implementation: " + clazzname, e);
} catch (InvocationTargetException e) {
throw new IllegalArgumentException("Could not instantiate implementation: " + clazzname, e);
} catch (ClassCastException e) {
throw new IllegalArgumentException("Could not instantiate implementation: " + clazzname, e);
}
}
