io.cucumber.needle.CucumberNeedleConfiguration Maven / Gradle / Ivy
package io.cucumber.needle;
import de.akquinet.jbosscc.needle.injection.InjectionProvider;
import java.util.HashSet;
import java.util.ResourceBundle;
import java.util.Set;
/**
* Reads cucumber-needle.properties to initialize additional
* {@link InjectionProvider}s.
*/
class CucumberNeedleConfiguration {
/**
* Default properties fiel name.
*/
static final String RESOURCE_CUCUMBER_NEEDLE = "cucumber-needle";
private final Set> injectionProviders = new HashSet<>();
/**
* Creates new instance from default resource
* {@link #RESOURCE_CUCUMBER_NEEDLE}.
*/
CucumberNeedleConfiguration() {
this(RESOURCE_CUCUMBER_NEEDLE);
}
CucumberNeedleConfiguration(final String resourceName) {
final ResourceBundle resourceBundle = LoadResourceBundle.INSTANCE.apply(resourceName);
final Set classNames = ReadInjectionProviderClassNames.INSTANCE.apply(resourceBundle);
for (final String className : classNames) {
try {
final Class clazz = Class.forName(className);
CreateInstanceByDefaultConstructor createInstance = CreateInstanceByDefaultConstructor.INSTANCE;
if (isInjectionProvider(clazz)) {
injectionProviders.add((InjectionProvider) createInstance.apply(clazz));
} else if (isInjectionProviderInstanceSupplier(clazz)) {
final InjectionProviderInstancesSupplier supplier = (InjectionProviderInstancesSupplier) createInstance
.apply(clazz);
final Set> providers = supplier.get();
if (providers != null) {
injectionProviders.addAll(providers);
}
}
} catch (final Exception e) {
throw new IllegalStateException("failed to initialize custom injection providers", e);
}
}
}
/**
* Checks if given class is an {@link InjectionProvider}
*
* @param type Class to check
* @return true if type can be cast to
* {@link InjectionProvider}
*/
static boolean isInjectionProvider(final Class type) {
return InjectionProvider.class.isAssignableFrom(type);
}
/**
* Checks if given class is an {@link InjectionProviderInstancesSupplier}
*
* @param type Class to check
* @return true if type can be cast to
* {@link InjectionProviderInstancesSupplier}
*/
static boolean isInjectionProviderInstanceSupplier(final Class type) {
return InjectionProviderInstancesSupplier.class.isAssignableFrom(type);
}
InjectionProvider[] getInjectionProviders() {
return injectionProviders.toArray(new InjectionProvider[0]);
}
}