org.simantics.interop/src/org/simantics/interop/test/Path.java

   1 package org.simantics.interop.test;\r
   2 \r
   3 import java.util.ArrayList;\r
   4 import java.util.Collection;\r
   5 import java.util.List;\r
   6 \r
   7 import org.simantics.db.Resource;\r
   8 import org.simantics.db.Statement;\r
   9 \r
  10 public class Path {\r
  11         private Resource begin;\r
  12         private Resource end;\r
  13         private List<Statement> statements = new ArrayList<Statement>(2);\r
  14         \r
  15         public Path(Statement s) {\r
  16                 begin = s.getSubject();\r
  17                 end = s.getObject();\r
  18                 statements.add(s);\r
  19         }\r
  20         \r
  21         public Path(Path p) {\r
  22                 begin = p.begin;\r
  23                 end = p.end;\r
  24                 statements.addAll(p.statements);\r
  25         }\r
  26         \r
  27         public Resource getBegin() {\r
  28                 return begin;\r
  29         }\r
  30         \r
  31         public Resource getEnd() {\r
  32                 return end;\r
  33         }\r
  34         \r
  35         public List<Statement> getStatements() {\r
  36                 return statements;\r
  37         }\r
  38         \r
  39         public int getLength() {\r
  40                 return statements.size();\r
  41         }\r
  42         \r
  43         public boolean add(Statement s) {\r
  44                 if (!statements.get(statements.size()-1).getObject().equals(s.getSubject()))\r
  45                         //throw new RuntimeException("Non continuous path. " + s.getSubject() + " does not match " + statements.get(statements.size()-1).getObject());\r
  46                         return false;\r
  47                 if (s.getObject().equals(begin))\r
  48                         return false;\r
  49                 for (Statement stm : statements) {\r
  50                         if (stm.getObject().equals(s.getObject()))\r
  51                                 return false;\r
  52                 }\r
  53                 end = s.getObject();\r
  54                 statements.add(s);\r
  55                 return true;\r
  56         }\r
  57         \r
  58         public static Collection<Path> expand(Path path, Collection<Statement> statements) {\r
  59                 Collection<Path> result = new ArrayList<Path>(statements.size());\r
  60                 for (Statement s : statements) {\r
  61                         Path p = new Path(path);\r
  62                         p.add(s);\r
  63                         result.add(p);\r
  64                 }\r
  65                 return result;\r
  66         }\r
  67         \r
  68         public static Collection<Path> create(Collection<Statement> statements) {\r
  69                 Collection<Path> result = new ArrayList<Path>(statements.size());\r
  70                 for (Statement s : statements) {\r
  71                         Path p = new Path(s);\r
  72                         result.add(p);\r
  73                 }\r
  74                 return result;\r
  75         }\r
  76         \r
  77         @Override\r
  78         public boolean equals(Object arg0) {\r
  79                 if(!arg0.getClass().equals(getClass()))\r
  80                         return false;\r
  81                 Path other = (Path)arg0;\r
  82                 if (!begin.equals(other.begin))\r
  83                         return false;\r
  84                 if (!end.equals(other.end))\r
  85                         return false;\r
  86                 if (statements.size() != other.statements.size())\r
  87                         return false;\r
  88                 for (int i = 0; i < statements.size(); i++) {\r
  89                         if (!statements.get(i).equals(other.statements.get(i)))\r
  90                                 return false;\r
  91                 }\r
  92                 return false;\r
  93         }\r
  94         \r
  95         @Override\r
  96         public int hashCode() {\r
  97                 return begin.hashCode() + end.hashCode();\r
  98         }\r
  99 }\r