bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/ExtendedUris.java

   1 package org.simantics.db.layer0.util;\r
   2 \r
   3 import java.util.Collection;\r
   4 \r
   5 import org.simantics.databoard.util.URIStringUtils;\r
   6 import org.simantics.db.ReadGraph;\r
   7 import org.simantics.db.Resource;\r
   8 import org.simantics.db.Statement;\r
   9 import org.simantics.db.common.request.FunctionalStatementMapOfResource;\r
  10 import org.simantics.db.common.uri.UnescapedChildMapOfResource;\r
  11 import org.simantics.db.exception.DatabaseException;\r
  12 import org.simantics.layer0.Layer0;\r
  13 import org.simantics.scl.runtime.tuple.Tuple2;\r
  14 \r
  15 public class ExtendedUris {\r
  16 \r
  17     public static Resource resolveAbsoluteUri(ReadGraph graph, String uri) throws DatabaseException {\r
  18         if(!uri.startsWith("http:/"))\r
  19             throw new IllegalArgumentException("Invalid absolute URI '" + uri + "'.");\r
  20         return resolveRelativeUri(graph, graph.getRootLibrary(), uri.substring(6));\r
  21     }\r
  22 \r
  23     public static Resource resolveRelativeUri(ReadGraph graph, Resource parent, String uri) throws DatabaseException {\r
  24         int beginPos = 0;\r
  25         while(beginPos < uri.length()) {\r
  26             int endPos;\r
  27             for(endPos = beginPos+1; endPos < uri.length(); ++endPos) {\r
  28                 char c = uri.charAt(endPos);\r
  29                 if(c == '/' || c == '#')\r
  30                     break;\r
  31             }\r
  32 \r
  33             char c = uri.charAt(beginPos);\r
  34             if(c == '/') {\r
  35                 String escapedName = uri.substring(beginPos+1, endPos);\r
  36                 String name = URIStringUtils.unescape(escapedName);\r
  37                 parent = graph.syncRequest(new UnescapedChildMapOfResource(parent)).get(name);\r
  38                 if(parent == null)\r
  39                     throw new DatabaseException("Didn't find a child " + name);\r
  40             }\r
  41             else if(c == '#') {\r
  42                 String escapedName = uri.substring(beginPos+1, endPos);\r
  43                 String name = URIStringUtils.unescape(escapedName);\r
  44                 parent = graph.syncRequest(new FunctionalStatementMapOfResource(parent)).get(name);\r
  45                 if(parent == null)\r
  46                     throw new DatabaseException("Didn't find a property " + name);\r
  47             }\r
  48             else\r
  49                 throw new IllegalArgumentException("Invalid relative URI '" + uri + "'.");\r
  50             beginPos = endPos;\r
  51         }\r
  52         return parent;\r
  53     }\r
  54     \r
  55     private static boolean initialized = false;\r
  56     private static Resource ElementToComponent;\r
  57     private static void initialize(ReadGraph graph) throws DatabaseException {\r
  58         ElementToComponent = graph.getResource("http://www.simantics.org/Modeling-1.2/ElementToComponent");\r
  59         initialized = true;\r
  60     }\r
  61     \r
  62     public static Tuple2 getPrimaryFunctionalReference(ReadGraph graph, Resource r) throws DatabaseException {\r
  63         if(!initialized)\r
  64             initialize(graph);\r
  65         Statement stat = graph.getPossibleStatement(r, ElementToComponent);\r
  66         if(stat != null)\r
  67             return statementToResult(graph, stat);\r
  68         return null;\r
  69     }\r
  70     \r
  71     public static Tuple2 getSecondaryFunctionalReference(ReadGraph graph, Resource r) throws DatabaseException {\r
  72         Layer0 L0 = Layer0.getInstance(graph);\r
  73         Collection<Statement> statements = graph.getStatements(r, L0.PropertyOf);\r
  74         if(statements.size() == 1) \r
  75             for(Statement stat : statements)\r
  76                 return statementToResult(graph, stat);\r
  77         return null;\r
  78     }\r
  79     \r
  80     private static Tuple2 statementToResult(ReadGraph graph, Statement stat) throws DatabaseException {\r
  81         return new Tuple2(stat.getObject(), graph.getInverse(stat.getPredicate()));\r
  82     }\r
  83 \r
  84 }\r