-package org.argeo.suite;
-
-import java.util.Map;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-/**
- * A container for an object whose relevance can be ranked. Typically used in an
- * OSGi context with the service.ranking property.
- */
-public class RankedObject<T> {
- private final static Log log = LogFactory.getLog(RankedObject.class);
-
- private final static String SERVICE_RANKING = "service.ranking";
-// private final static String SERVICE_ID = "service.id";
-
- private T object;
- private Map<String, Object> properties;
- private final Long rank;
-
- public RankedObject(T object, Map<String, Object> properties) {
- this(object, properties, extractRanking(properties));
- }
-
- public RankedObject(T object, Map<String, Object> properties, Long rank) {
- super();
- this.object = object;
- this.properties = properties;
- this.rank = rank;
- }
-
- private static Long extractRanking(Map<String, Object> properties) {
- if (properties == null)
- return 0l;
- if (properties.containsKey(SERVICE_RANKING))
- return Long.valueOf(properties.get(SERVICE_RANKING).toString());
-// else if (properties.containsKey(SERVICE_ID))
-// return (Long) properties.get(SERVICE_ID);
- else
- return 0l;
- }
-
- public T get() {
- return object;
- }
-
- public Map<String, Object> getProperties() {
- return properties;
- }
-
- public Long getRank() {
- return rank;
- }
-
- @Override
- public int hashCode() {
- return object.hashCode();
- }
-
- @Override
- public boolean equals(Object obj) {
- if (!(obj instanceof RankedObject))
- return false;
- RankedObject<?> other = (RankedObject<?>) obj;
- return rank.equals(other.rank) && object.equals(other.object);
- }
-
- @Override
- public String toString() {
- return object.getClass().getName() + " with rank " + rank;
- }
-
- public static <K, T> RankedObject<T> putIfHigherRank(Map<K, RankedObject<T>> map, K key, T object,
- Map<String, Object> properties) {
- RankedObject<T> rankedObject = new RankedObject<>(object, properties);
- if (!map.containsKey(key)) {
- map.put(key, rankedObject);
- if (log.isTraceEnabled())
- log.trace(
- "Added " + key + " as " + object.getClass().getName() + " with rank " + rankedObject.getRank());
- return rankedObject;
- } else {
- RankedObject<T> current = map.get(key);
- if (current.getRank() <= rankedObject.getRank()) {
- map.put(key, rankedObject);
- if (log.isTraceEnabled())
- log.trace("Replaced " + key + " by " + object.getClass().getName() + " with rank "
- + rankedObject.getRank());
- return rankedObject;
- } else {
- return current;
- }
- }
-
- }
-
-}