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package org.glassfish.jersey.server;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.glassfish.jersey.server.model.Resource;
/**
* A container for application resource models used during the {@link ApplicationHandler}
* initialization.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
final class ResourceBag {
/**
* Resource bag builder.
*/
public static final class Builder {
/**
* Resource handler classes for the models in this resource bag.
*/
private final Set<Class<?>> classes = Collections.newSetFromMap(new IdentityHashMap<>());
/**
* Resource handler instance for the models in this resource bag.
*/
private final Set<Object> instances = Collections.newSetFromMap(new IdentityHashMap<>());
/**
* Resource models.
*/
private final List<Resource> models = new LinkedList<Resource>();
/**
* Map of root path to resource model.
*/
private final Map<String, Resource> rootResourceMap = new HashMap<String, Resource>();
/**
* Register a new resource model created from a specific resource class.
*
* @param resourceClass introspected resource class.
* @param resourceModel resource model for the class.
*/
void registerResource(Class<?> resourceClass, Resource resourceModel) {
registerModel(resourceModel);
classes.add(resourceClass);
}
/**
* Register a new resource model created from a specific resource instance.
*
* @param resourceInstance introspected resource instance.
* @param resourceModel resource model for the instance.
*/
void registerResource(Object resourceInstance, Resource resourceModel) {
registerModel(resourceModel);
instances.add(resourceInstance);
}
/**
* Register a new programmatically created resource model.
*
* @param resourceModel programmatically created resource model.
*/
void registerProgrammaticResource(Resource resourceModel) {
registerModel(resourceModel);
classes.addAll(resourceModel.getHandlerClasses());
instances.addAll(resourceModel.getHandlerInstances());
}
private void registerModel(Resource resourceModel) {
final String path = resourceModel.getPath();
if (path != null) {
Resource existing = rootResourceMap.get(path);
if (existing != null) {
// merge resources
existing = Resource.builder(existing).mergeWith(resourceModel).build();
rootResourceMap.put(path, existing);
} else {
rootResourceMap.put(path, resourceModel);
}
} else {
models.add(resourceModel);
}
}
/**
* Build a resource bag.
*
* @return new resource bag initialized with the content of the resource bag builder.
*/
ResourceBag build() {
models.addAll(rootResourceMap.values());
return new ResourceBag(classes, instances, models);
}
}
/**
* Resource handler classes for the models in this resource bag.
*/
final Set<Class<?>> classes;
/**
* Resource handler instance for the models in this resource bag.
*/
final Set<Object> instances;
/**
* Resource models.
*/
final List<Resource> models;
private ResourceBag(Set<Class<?>> classes, Set<Object> instances, List<Resource> models) {
this.classes = classes;
this.instances = instances;
this.models = models;
}
/**
* Returns list of root resources.
*
* @return list of root resources.
*/
List<Resource> getRootResources() {
List<Resource> rootResources = new ArrayList<Resource>();
for (Resource resource : models) {
if (resource.getPath() != null) {
rootResources.add(resource);
}
}
return rootResources;
}
}