package org.infinispan.commons.configuration;
import org.infinispan.commons.CacheConfigurationException;
/**
* ConfigurationUtils. Contains utility methods used in configuration
*
* @author Tristan Tarrant
* @since 5.2
*/
public final class ConfigurationUtils {
private ConfigurationUtils() {}
/**
* Returns the builder that was used to build this class. This is determined by the instance having a class that
* has a {@link org.infinispan.commons.configuration.BuiltBy} annotation present on it. If one is not present
* a {@link org.infinispan.commons.CacheConfigurationException} is thrown
* @param built The instance to find the builder for
* @param <B> The type of builder
* @return The builder for this instance
* @throws CacheConfigurationException thrown if the instance class can't provide the builder
*/
@SuppressWarnings("unchecked")
public static <B> Class<? extends Builder<B>> builderFor(B built) throws CacheConfigurationException {
BuiltBy builtBy = built.getClass().getAnnotation(BuiltBy.class);
if (builtBy == null) {
throw new CacheConfigurationException("Missing BuiltBy annotation for configuration bean " + built.getClass().getName());
}
return (Class<? extends Builder<B>>) builtBy.value();
}
/**
* The same as {@link org.infinispan.commons.configuration.ConfigurationUtils#builderFor(Object)} except that it won't
* throw an exception if no builder class is found. Instead null will be returned.
* @param built The instance to find the builder for
* @param <B> The type of builder
* @return The builder for this instance or null if there isn't one
*/
@SuppressWarnings("unchecked")
public static <B> Class<? extends Builder<B>> builderForNonStrict(B built) {
BuiltBy builtBy = built.getClass().getAnnotation(BuiltBy.class);
if (builtBy == null) {
return null;
}
return (Class<? extends Builder<B>>) builtBy.value();
}
}