/**
* Instantiate, configure and return a new component described by the supplied configuration. This
* method does not manage the returned instance.
*
* @param config the configuration describing the component
* @return the new component, or null if the component could not be successfully configured
* @throws IllegalArgumentException if the component could not be configured properly
*/
@SuppressWarnings("unchecked")
protected ComponentType newInstance(ConfigType config) {
String[] classpath = config.getComponentClasspathArray();
final ClassLoader classLoader = this.getClassLoaderFactory().getClassLoader(classpath);
assert classLoader != null;
ComponentType newInstance = null;
try {
// Don't use ClassLoader.loadClass(String), as it doesn't properly initialize the class
// (specifically static initializers may not be called)
Class<?> componentClass = Class.forName(config.getComponentClassname(), true, classLoader);
newInstance = doCreateInstance(componentClass);
if (newInstance instanceof Component) {
((Component<ConfigType>) newInstance).setConfiguration(config);
}
if (config.getProperties() != null) {
for (Map.Entry<String, Object> entry : config.getProperties().entrySet()) {
// Set the JavaBean-style property on the RepositorySource instance ...
Reflection reflection = new Reflection(newInstance.getClass());
reflection.invokeSetterMethodOnTarget(entry.getKey(), newInstance, entry.getValue());
}
}
configure(newInstance, config);
} catch (Throwable e) {
throw new SystemFailureException(e);
}
if (newInstance instanceof Component
&& ((Component<ConfigType>) newInstance).getConfiguration() == null) {
throw new SystemFailureException(CommonI18n.componentNotConfigured.text(config.getName()));
}
return newInstance;
}
