RankingKey.java

   1 package org.argeo.api;
   2
   3 import java.util.Map;
   4
   5 /**
   6  * Key used to classify and filter available components (typically provided by
   7  * OSGi services).
   8  */
   9 public class RankingKey implements Comparable<RankingKey> {
  10         public final static String SERVICE_PID = "service.pid";
  11         public final static String SERVICE_ID = "service.id";
  12         public final static String SERVICE_RANKING = "service.ranking";
  13
  14         private String pid;
  15         private Integer ranking = 0;
  16         private Long id = 0l;
  17         private String dataType;
  18         private String dataPath;
  19
  20         public RankingKey(String pid, Integer ranking, Long id, String dataType, String dataPath) {
  21                 super();
  22                 this.pid = pid;
  23                 this.ranking = ranking;
  24                 this.id = id;
  25                 this.dataType = dataType;
  26                 this.dataPath = dataPath;
  27         }
  28
  29         public RankingKey(Map<String, Object> properties) {
  30                 this.pid = properties.containsKey(SERVICE_PID) ? properties.get(SERVICE_PID).toString() : null;
  31                 this.ranking = properties.containsKey(SERVICE_RANKING)
  32                                 ? Integer.parseInt(properties.get(SERVICE_RANKING).toString())
  33                                 : 0;
  34                 this.id = properties.containsKey(SERVICE_ID) ? (Long) properties.get(SERVICE_ID) : null;
  35
  36                 // Argeo specific
  37                 this.dataType = properties.containsKey(NodeConstants.DATA_TYPE)
  38                                 ? properties.get(NodeConstants.DATA_TYPE).toString()
  39                                 : null;
  40         }
  41
  42         @Override
  43         public int hashCode() {
  44                 Integer result = 0;
  45                 if (pid != null)
  46                         result = +pid.hashCode();
  47                 if (ranking != null)
  48                         result = +ranking;
  49                 if (dataType != null)
  50                         result = +dataType.hashCode();
  51                 return result;
  52         }
  53
  54         @Override
  55         protected Object clone() throws CloneNotSupportedException {
  56                 return new RankingKey(pid, ranking, id, dataType, dataPath);
  57         }
  58
  59         @Override
  60         public String toString() {
  61                 StringBuilder sb = new StringBuilder("");
  62                 if (pid != null)
  63                         sb.append(pid);
  64                 if (ranking != null && ranking != 0)
  65                         sb.append(' ').append(ranking);
  66                 if (dataType != null)
  67                         sb.append(' ').append(dataType);
  68                 return sb.toString();
  69         }
  70
  71         @Override
  72         public boolean equals(Object obj) {
  73                 if (!(obj instanceof RankingKey))
  74                         return false;
  75                 RankingKey other = (RankingKey) obj;
  76                 return equalsOrBothNull(pid, other.pid) && equalsOrBothNull(ranking, other.ranking)
  77                                 && equalsOrBothNull(id, other.id) && equalsOrBothNull(dataType, other.dataType)
  78                                 && equalsOrBothNull(dataPath, other.dataPath);
  79         }
  80
  81         @Override
  82         public int compareTo(RankingKey o) {
  83                 if (pid != null && o.pid != null) {
  84                         if (pid.equals(o.pid)) {
  85                                 if (ranking.equals(o.ranking))
  86                                         if (id != null && o.id != null)
  87                                                 return id.compareTo(o.id);
  88                                         else
  89                                                 return 0;
  90                                 else
  91                                         return ranking.compareTo(o.ranking);
  92                         } else {
  93                                 return pid.compareTo(o.pid);
  94                         }
  95
  96                 } else {
  97                         if (dataType != null && o.dataType != null) {
  98                                 if (dataType.equals(o.dataType)) {
  99                                         // TODO factorise
 100                                         if (ranking.equals(o.ranking))
 101                                                 if (id != null && o.id != null)
 102                                                         return id.compareTo(o.id);
 103                                                 else
 104                                                         return 0;
 105                                         else
 106                                                 return ranking.compareTo(o.ranking);
 107                                 } else {
 108                                         return dataPath.compareTo(o.dataType);
 109                                 }
 110                         }
 111                 }
 112                 return -1;
 113         }
 114
 115         public String getPid() {
 116                 return pid;
 117         }
 118
 119         public Integer getRanking() {
 120                 return ranking;
 121         }
 122
 123         public Long getId() {
 124                 return id;
 125         }
 126
 127         public String getDataType() {
 128                 return dataType;
 129         }
 130
 131         public String getDataPath() {
 132                 return dataPath;
 133         }
 134
 135         public static RankingKey minPid(String pid) {
 136                 return new RankingKey(pid, Integer.MIN_VALUE, null, null, null);
 137         }
 138
 139         public static RankingKey maxPid(String pid) {
 140                 return new RankingKey(pid, Integer.MAX_VALUE, null, null, null);
 141         }
 142
 143         public static RankingKey minDataType(String dataType) {
 144                 return new RankingKey(null, Integer.MIN_VALUE, null, dataType, null);
 145         }
 146
 147         public static RankingKey maxDataType(String dataType) {
 148                 return new RankingKey(null, Integer.MAX_VALUE, null, dataType, null);
 149         }
 150
 151         private static boolean equalsOrBothNull(Object o1, Object o2) {
 152                 if (o1 == null && o2 == null)
 153                         return true;
 154                 if (o1 == null && o2 != null)
 155                         return false;
 156                 if (o1 != null && o2 == null)
 157                         return false;
 158                 return o2.equals(o1);
 159         }
 160 }