org.argeo.init/src/org/argeo/api/a2/A2Branch.java

   1 package org.argeo.api.a2;
   2
   3 import java.lang.System.Logger;
   4 import java.lang.System.Logger.Level;
   5 import java.util.Collections;
   6 import java.util.SortedMap;
   7 import java.util.TreeMap;
   8
   9 import org.osgi.framework.Version;
  10
  11 /**
  12  * A logical linear sequence of versions of a given {@link A2Component}. This is
  13  * typically a combination of major and minor version, indicating backward
  14  * compatibility.
  15  */
  16 public class A2Branch implements Comparable<A2Branch> {
  17         private final static Logger logger = System.getLogger(A2Branch.class.getName());
  18
  19         private final A2Component component;
  20         private final String id;
  21
  22         final SortedMap<Version, A2Module> modules = Collections.synchronizedSortedMap(new TreeMap<>());
  23
  24         public A2Branch(A2Component component, String id) {
  25                 this.component = component;
  26                 this.id = id;
  27                 component.branches.put(id, this);
  28         }
  29
  30         public Iterable<A2Module> listModules(Object filter) {
  31                 return modules.values();
  32         }
  33
  34         A2Module getOrAddModule(Version version, Object locator) {
  35                 if (modules.containsKey(version)) {
  36                         A2Module res = modules.get(version);
  37                         if (!res.getLocator().equals(locator)) {
  38                                 logger.log(Level.TRACE,
  39                                                 () -> "Inconsistent locator " + locator + " (registered: " + res.getLocator() + ")");
  40                         }
  41                         return res;
  42                 } else
  43                         return new A2Module(this, version, locator);
  44         }
  45
  46         public A2Module last() {
  47                 return modules.get(modules.lastKey());
  48         }
  49
  50         public A2Module first() {
  51                 return modules.get(modules.firstKey());
  52         }
  53
  54         public A2Component getComponent() {
  55                 return component;
  56         }
  57
  58         public String getId() {
  59                 return id;
  60         }
  61
  62         @Override
  63         public int compareTo(A2Branch o) {
  64                 return id.compareTo(id);
  65         }
  66
  67         @Override
  68         public int hashCode() {
  69                 return id.hashCode();
  70         }
  71
  72         @Override
  73         public boolean equals(Object obj) {
  74                 if (obj instanceof A2Branch) {
  75                         A2Branch o = (A2Branch) obj;
  76                         return component.equals(o.component) && id.equals(o.id);
  77                 } else
  78                         return false;
  79         }
  80
  81         @Override
  82         public String toString() {
  83                 return getCoordinates();
  84         }
  85
  86         public String getCoordinates() {
  87                 return component + ":" + id;
  88         }
  89
  90         static String versionToBranchId(Version version) {
  91                 return version.getMajor() + "." + version.getMinor();
  92         }
  93 }