public class ReferencedResource<T extends SharedResource> extends Object implements AutoCloseable
Utility class for working with reference-counted SharedResources.
Sometimes, you may want a method to return both a resource object and
a ResourceReference that refers the resource object (for later release of the resource).
Java methods cannot return multiple objects, so this class provides Pair-like functionality
for returning both.
Example usage:
ReferencedResource<MyResource> getResource() {
final ResourceReference ref = resource.refer();
return new ReferencedResource(resource, ref);
}
void useResource() {
final ReferencedResource<MyResource> referencedResource = getResource();
referencedResource.getResource().use();
referencedResource.getReference().close();
}
This class implements AutoCloseable, so the latter method may also be written as follows:
void useResource() {
for (final ReferencedResource<MyResource> referencedResource = getResource()) {
referencedResource.getResource().use();
}
}
| Modifier and Type | Field and Description |
|---|---|
private ResourceReference |
reference |
private T |
resource |
| Constructor and Description |
|---|
ReferencedResource(T resource,
ResourceReference reference) |
| Modifier and Type | Method and Description |
|---|---|
void |
close() |
ResourceReference |
getReference() |
T |
getResource() |
private final T extends SharedResource resource
private final ResourceReference reference
public ReferencedResource(T resource, ResourceReference reference)
public T getResource()
public ResourceReference getReference()
public void close()
close in interface AutoCloseableCopyright © 2018. All rights reserved.