--- /dev/null
+package org.argeo.api.register;
+
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * Key used to classify and filter available components.
+ */
+public class RankingKey implements Comparable<RankingKey> {
+ public final static String SERVICE_PID = "service.pid";
+ public final static String SERVICE_ID = "service.id";
+ public final static String SERVICE_RANKING = "service.ranking";
+
+ private String pid;
+ private Integer ranking = 0;
+ private Long id = 0l;
+
+ public RankingKey(String pid, Integer ranking, Long id) {
+ super();
+ this.pid = pid;
+ this.ranking = ranking;
+ this.id = id;
+ }
+
+ public RankingKey(Map<String, Object> properties) {
+ this.pid = properties.containsKey(SERVICE_PID) ? properties.get(SERVICE_PID).toString() : null;
+ this.ranking = properties.containsKey(SERVICE_RANKING)
+ ? Integer.parseInt(properties.get(SERVICE_RANKING).toString())
+ : 0;
+ this.id = properties.containsKey(SERVICE_ID) ? (Long) properties.get(SERVICE_ID) : null;
+ }
+
+ @Override
+ public int hashCode() {
+ Integer result = 0;
+ if (pid != null)
+ result = +pid.hashCode();
+ if (ranking != null)
+ result = +ranking;
+ return result;
+ }
+
+ @Override
+ protected Object clone() throws CloneNotSupportedException {
+ return new RankingKey(pid, ranking, id);
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder sb = new StringBuilder("");
+ if (pid != null)
+ sb.append(pid);
+ if (ranking != null && ranking != 0)
+ sb.append(' ').append(ranking);
+ return sb.toString();
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (!(obj instanceof RankingKey))
+ return false;
+ RankingKey other = (RankingKey) obj;
+ return Objects.equals(pid, other.pid) && Objects.equals(ranking, other.ranking) && Objects.equals(id, other.id);
+ }
+
+ @Override
+ public int compareTo(RankingKey o) {
+ if (pid != null && o.pid != null) {
+ if (pid.equals(o.pid)) {
+ if (ranking.equals(o.ranking))
+ if (id != null && o.id != null)
+ return id.compareTo(o.id);
+ else
+ return 0;
+ else
+ return ranking.compareTo(o.ranking);
+ } else {
+ return pid.compareTo(o.pid);
+ }
+
+ } else {
+ }
+ return -1;
+ }
+
+ public String getPid() {
+ return pid;
+ }
+
+ public Integer getRanking() {
+ return ranking;
+ }
+
+ public Long getId() {
+ return id;
+ }
+
+ public static RankingKey minPid(String pid) {
+ return new RankingKey(pid, Integer.MIN_VALUE, null);
+ }
+
+ public static RankingKey maxPid(String pid) {
+ return new RankingKey(pid, Integer.MAX_VALUE, null);
+ }
+}