| package org.onlab.onos.net; |
| |
| import com.google.common.collect.ImmutableSet; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| /** |
| * Base abstraction of an annotated entity. |
| */ |
| public class AbstractAnnotated implements Annotated { |
| |
| private static final Map<String, String> EMPTY = new HashMap<>(); |
| |
| private final Map<String, String> annotations; |
| |
| // For serialization |
| protected AbstractAnnotated() { |
| this.annotations = EMPTY; |
| } |
| |
| /** |
| * Creates a new entity, annotated with the specified annotations. |
| * |
| * @param annotations optional key/value annotations map |
| */ |
| protected AbstractAnnotated(Map<String, String>[] annotations) { |
| checkArgument(annotations.length <= 1, "Only one set of annotations is expected"); |
| this.annotations = annotations.length == 1 ? annotations[0] : EMPTY; |
| } |
| |
| @Override |
| public Set<String> annotationKeys() { |
| return ImmutableSet.copyOf(annotations.keySet()); |
| } |
| |
| @Override |
| public String annotation(String key) { |
| return annotations.get(key); |
| } |
| |
| } |