bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.layer0.utils.instantiation;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.List;\r
  16 \r
  17 import org.simantics.db.ReadGraph;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.WriteGraph;\r
  20 import org.simantics.db.common.utils.Literals;\r
  21 import org.simantics.db.common.utils.NameUtils;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 \r
  24 \r
  25 public class Instance {\r
  26     \r
  27     public static class RelatedInstance {\r
  28         Resource relation;\r
  29         Instance instance;\r
  30         int      cardinality;\r
  31     }\r
  32 \r
  33     public Resource              equals           = null;\r
  34     public List<RelatedInstance> relatedInstances = new ArrayList<RelatedInstance>();\r
  35     public Object                value            = null;\r
  36 \r
  37     public Instance() {\r
  38     }\r
  39     \r
  40     public Instance(Resource equals) {\r
  41         this.equals = equals;\r
  42     }\r
  43     \r
  44     public Resource instantiate(WriteGraph graph) throws DatabaseException {\r
  45         if(equals != null)\r
  46             return equals;\r
  47         Resource ret = graph.newResource();        \r
  48         for(RelatedInstance instance : relatedInstances)\r
  49             for(int i=0;i<instance.cardinality;++i) \r
  50                 graph.claim(ret, instance.relation, \r
  51                         instance.instance.instantiate(graph));\r
  52         if(value != null)\r
  53             graph.claimValue(ret, value);\r
  54         return ret;\r
  55     }\r
  56     \r
  57     public Resource instantiateUsing(WriteGraph graph, Resource resource) throws DatabaseException {\r
  58         if(equals != null)\r
  59             return equals;\r
  60         Resource ret = resource;        \r
  61         for(RelatedInstance instance : relatedInstances)\r
  62             for(int i=0;i<instance.cardinality;++i) \r
  63                 graph.claim(ret, instance.relation, \r
  64                         instance.instance.instantiate(graph));     \r
  65         if(value != null)\r
  66             graph.claimValue(ret, value);\r
  67         return ret;\r
  68     }   \r
  69     \r
  70     public void print(StringBuilder builder, int indentation, ReadGraph graph) throws DatabaseException {\r
  71         ++ indentation;\r
  72         if(equals != null) {\r
  73             builder.append(NameUtils.getSafeName(graph, equals));\r
  74         }\r
  75         else {\r
  76             if(value != null) {\r
  77                 builder.append(Literals.literalToString(value));\r
  78                 builder.append(" : ");\r
  79             }\r
  80             else \r
  81                 builder.append("* : ");        \r
  82 //            boolean first = true;            \r
  83     \r
  84             for(RelatedInstance instance : relatedInstances) {\r
  85                 builder.append("\n");\r
  86                 for(int i=0;i<indentation;++i)\r
  87                     builder.append("    ");\r
  88                 builder.append(NameUtils.getSafeName(graph, instance.relation));\r
  89                 if(instance.cardinality != 1)\r
  90                     builder.append("[" + instance.cardinality + "]");\r
  91                 builder.append(" = ");\r
  92                 instance.instance.print(builder, indentation, graph);\r
  93             }\r
  94 \r
  95         }\r
  96     }\r
  97     \r
  98     public String toString(ReadGraph graph) throws DatabaseException {\r
  99         StringBuilder builder = new StringBuilder();\r
 100         print(builder, 0, graph);\r
 101         return builder.toString();\r
 102     }\r
 103     \r
 104 }\r