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package org.glassfish.jersey.message.filtering;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import org.glassfish.jersey.internal.util.collection.DataStructures;
import org.glassfish.jersey.message.filtering.spi.EntityGraph;
import org.glassfish.jersey.message.filtering.spi.EntityGraphProvider;
import org.glassfish.jersey.message.filtering.spi.ObjectGraph;
/**
* Provides {@link EntityGraph entity graph} and {@link ObjectGraph object graph} instances.
*
* @author Michal Gajdos
*/
final class EntityGraphProviderImpl implements EntityGraphProvider {
private final ConcurrentMap<Class<?>, EntityGraph> writerClassToGraph = DataStructures.createConcurrentMap();
private final ConcurrentMap<Class<?>, EntityGraph> readerClassToGraph = DataStructures.createConcurrentMap();
@Override
public EntityGraph getOrCreateEntityGraph(final Class<?> entityClass, final boolean forWriter) {
final ConcurrentMap<Class<?>, EntityGraph> classToGraph = forWriter ? writerClassToGraph : readerClassToGraph;
if (!classToGraph.containsKey(entityClass)) {
classToGraph.putIfAbsent(entityClass, new EntityGraphImpl(entityClass));
}
return classToGraph.get(entityClass);
}
@Override
public EntityGraph getOrCreateEmptyEntityGraph(final Class<?> entityClass, final boolean forWriter) {
final ConcurrentMap<Class<?>, EntityGraph> classToGraph = forWriter ? writerClassToGraph : readerClassToGraph;
if (!classToGraph.containsKey(entityClass)
|| !(classToGraph.get(entityClass) instanceof EmptyEntityGraphImpl)) {
classToGraph.put(entityClass, new EmptyEntityGraphImpl(entityClass));
}
return classToGraph.get(entityClass);
}
/**
* Return an unmodifiable map of entity graphs for reader/writer.
*
* @param forWriter flag determining whether the returned map should be for writer/reader.
* @return an unmodifiable map of entity graphs.
*/
public Map<Class<?>, EntityGraph> asMap(final boolean forWriter) {
return Collections.unmodifiableMap(forWriter ? writerClassToGraph : readerClassToGraph);
}
@Override
public boolean containsEntityGraph(final Class<?> entityClass, final boolean forWriter) {
return forWriter ? writerClassToGraph.containsKey(entityClass) : readerClassToGraph.containsKey(entityClass);
}
@Override
public ObjectGraph createObjectGraph(final Class<?> entityClass, final Set<String> filteringScopes,
final boolean forWriter) {
final Map<Class<?>, EntityGraph> classToGraph = forWriter ? writerClassToGraph : readerClassToGraph;
final EntityGraph entityGraph = classToGraph.get(entityClass);
return entityGraph == null
? new EmptyObjectGraph(entityClass)
: new ObjectGraphImpl(classToGraph, entityGraph, filteringScopes);
}
}