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package org.onap.nbi.commons;
import java.net.URI;
import java.util.List;
import java.util.Set;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
public class ResourceManagement<T extends Resource> {
/**
* Build default 201 filtered response for resource
*
* @param resource
* @param jsonRepresentation
* @return
*/
protected ResponseEntity<Object> createResponse(final Resource resource,
final JsonRepresentation jsonRepresentation) {
URI location = null;
if (RequestContextHolder.getRequestAttributes() != null) {
location = ServletUriComponentsBuilder.fromCurrentRequest().path("/{id}").buildAndExpand(resource.getId())
.toUri();
} else {
location = URI.create("/");
}
// Get entity representation
final Object entity = this.getEntity(resource, jsonRepresentation);
return ResponseEntity.created(location).body(entity);
}
/**
* Build default 200 filtered response for resource
*
* @param resource
* @param jsonRepresentation
* @return
*/
protected ResponseEntity<Object> getResponse(final Object resource, final JsonRepresentation jsonRepresentation) {
// Get entity representation
final Object entity = this.getEntity(resource, jsonRepresentation);
return ResponseEntity.ok(entity);
}
/**
* Build default 206 filtered partial response for resource
*
* @param resource
* @param jsonRepresentation
* @return
*/
protected ResponseEntity<Object> getPartialResponse(final Object resource,
final JsonRepresentation jsonRepresentation) {
// Get entity representation
final Object entity = this.getEntity(resource, jsonRepresentation);
return ResponseEntity.status(HttpStatus.PARTIAL_CONTENT).body(entity);
}
/**
* Build default 200 filtered response for resource collection
*
* @param resources
* @param jsonRepresentation
* @param headers
* @return
*/
protected ResponseEntity<Object> findResponse(final List<?> resources, final JsonRepresentation jsonRepresentation,
HttpHeaders headers) {
// Get entities representation
final Object entities = this.getEntities(resources, jsonRepresentation);
return ResponseEntity.ok().headers(headers).body(entities);
}
/**
* Build 204 Empty response
*
* @return
*/
protected ResponseEntity<Object> deleteResponse() {
return ResponseEntity.noContent().build();
}
/**
* Get entity, as resource or jacksonNode depending fields value
*
* @param resource
* @param jsonRepresentation
* @return
*/
protected Object getEntity(final Object resource, JsonRepresentation jsonRepresentation) {
Object entity;
Set<String> attributes = jsonRepresentation.getAttributes();
if (attributes == null || attributes.isEmpty() || attributes.contains(ReservedKeys.ALL_FIELDS)) {
entity = resource;
} else {
entity = JacksonFilter.createNode(resource, jsonRepresentation);
}
return entity;
}
/**
* Get entities, as resource list or jacksonNode depending fields value
*
* @param resources
* @param jsonRepresentation
* @return
*/
protected Object getEntities(final List<?> resources, JsonRepresentation jsonRepresentation) {
Object entities;
Set<String> attributes = jsonRepresentation.getAttributes();
if (attributes == null || attributes.isEmpty() || attributes.contains(ReservedKeys.ALL_FIELDS)) {
entities = resources;
} else {
entities = JacksonFilter.createNodes(resources, jsonRepresentation);
}
return entities;
}
}
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