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package org.glassfish.jersey.message.filtering;
import java.lang.annotation.Annotation;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.Spliterator;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
import javax.ws.rs.core.Configuration;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.glassfish.jersey.internal.inject.InjectionManager;
import org.glassfish.jersey.internal.inject.Providers;
import org.glassfish.jersey.message.filtering.internal.LocalizationMessages;
import org.glassfish.jersey.message.filtering.spi.FilteringHelper;
import org.glassfish.jersey.message.filtering.spi.ScopeProvider;
import org.glassfish.jersey.message.filtering.spi.ScopeResolver;
import org.glassfish.jersey.model.internal.RankedComparator;
/**
* Default implementation of {@link ScopeProvider scope provider}. This class can be used on client to retrieve
* entity-filtering scopes from given entity annotations or injected {@link Configuration configuration}. Class can also serve
* as a base class for server-side implementations.
*
* @author Michal Gajdos
* @see ServerScopeProvider
*/
@Singleton
class CommonScopeProvider implements ScopeProvider {
private static final Logger LOGGER = Logger.getLogger(CommonScopeProvider.class.getName());
private final List<ScopeResolver> resolvers;
private final Configuration config;
/**
* Create new common scope provider with injected {@link Configuration configuration} and
* {@link InjectionManager injection manager}.
*/
@Inject
public CommonScopeProvider(final Configuration config, final InjectionManager injectionManager) {
this.config = config;
Spliterator<ScopeResolver> resolverSpliterator =
Providers.getAllProviders(injectionManager, ScopeResolver.class, new RankedComparator<>()).spliterator();
this.resolvers = StreamSupport.stream(resolverSpliterator, false).collect(Collectors.toList());
}
@Override
public Set<String> getFilteringScopes(final Annotation[] entityAnnotations, final boolean defaultIfNotFound) {
Set<String> filteringScopes = new HashSet<>();
// Entity Annotations.
filteringScopes.addAll(getFilteringScopes(entityAnnotations));
if (filteringScopes.isEmpty()) {
// Configuration.
filteringScopes.addAll(getFilteringScopes(config));
}
// Use default scope if not in other scope.
return returnFilteringScopes(filteringScopes, defaultIfNotFound);
}
/**
* Return the default entity-filtering scope if the given set of scopes is empty and the processing should fallback to the
* default.
*
* @param filteringScopes entity-filtering scopes to be examined.
* @param returnDefaultFallback {@code true} if the default entity-filtering scope should be returned if the given scopes
* are empty, {@code false} otherwise.
* @return entity-filtering scopes.
*/
protected Set<String> returnFilteringScopes(final Set<String> filteringScopes, final boolean returnDefaultFallback) {
return returnDefaultFallback && filteringScopes.isEmpty() ? FilteringHelper.getDefaultFilteringScope() : filteringScopes;
}
/**
* Get entity-filtering scopes from all available {@link ScopeResolver scope resolvers} for given annotations.
*
* @param annotations annotations to retrieve entity-filtering scopes from.
* @return entity-filtering scopes or an empty set if none scope can be resolved.
*/
protected Set<String> getFilteringScopes(final Annotation[] annotations) {
Set<String> filteringScopes = new HashSet<>();
for (final ScopeResolver provider : resolvers) {
mergeFilteringScopes(filteringScopes, provider.resolve(annotations));
}
return filteringScopes;
}
/**
* Get entity-filtering scopes from {@link Configuration}.
*
* @param config configuration the entity-filtering scopes are obtained from.
* @return entity-filtering scopes or an empty set if none scope can be resolved.
*/
private Set<String> getFilteringScopes(final Configuration config) {
final Object property = config.getProperty(EntityFilteringFeature.ENTITY_FILTERING_SCOPE);
Set<String> filteringScopes = Collections.emptySet();
if (property != null) {
if (property instanceof Annotation) {
filteringScopes = getFilteringScopes(new Annotation[] {(Annotation) property});
} else if (property instanceof Annotation[]) {
filteringScopes = getFilteringScopes((Annotation[]) property);
} else {
LOGGER.log(Level.CONFIG, LocalizationMessages.ENTITY_FILTERING_SCOPE_NOT_ANNOTATIONS(property));
}
}
return filteringScopes;
}
/**
* Merge two sets of entity-filtering scopes.
*
* @param filteringScopes existing entity-filtering scopes.
* @param resolvedScopes entity-filtering scopes to be added to the existing ones.
*/
protected void mergeFilteringScopes(final Set<String> filteringScopes, final Set<String> resolvedScopes) {
if (!filteringScopes.isEmpty() && !resolvedScopes.isEmpty()) {
LOGGER.log(Level.FINE, LocalizationMessages.MERGING_FILTERING_SCOPES());
}
filteringScopes.addAll(resolvedScopes);
}
}