bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/writer/DirectGraphWriter.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.writer;\r
  13 \r
  14 import org.simantics.db.Resource;\r
  15 import org.simantics.db.WriteGraph;\r
  16 import org.simantics.db.exception.DatabaseException;\r
  17 import org.simantics.layer0.Layer0;\r
  18 \r
  19 public class DirectGraphWriter extends GraphWriterPartial {\r
  20 \r
  21         Resource current;\r
  22         WriteGraph wg;\r
  23                 \r
  24         public DirectGraphWriter(WriteGraph graph) {\r
  25                 super(graph);\r
  26                 this.wg = graph;\r
  27                 this.current = null;\r
  28         }\r
  29 \r
  30     @Override\r
  31     public GraphWriter create() throws DatabaseException {\r
  32         current = wg.newResource();\r
  33         return this;\r
  34     }\r
  35 \r
  36         @Override\r
  37         public GraphWriter create(Resource type) throws DatabaseException {\r
  38                 current = wg.newResource();\r
  39         Layer0 b = Layer0.getInstance(wg);\r
  40                 wg.claim(current, b.InstanceOf, null, type);\r
  41                 return this;\r
  42         }\r
  43 \r
  44         @Override\r
  45         public Resource get() {\r
  46                 return current;\r
  47         }\r
  48 \r
  49         @Override\r
  50         public GraphWriter handle(Resource s) {\r
  51                 current = s;\r
  52                 return this;\r
  53         }\r
  54 \r
  55         @Override\r
  56         public GraphWriter let(Resource p, Resource o) throws DatabaseException {\r
  57                 if(current == null)\r
  58                         throw new RuntimeException("Should call create or handle before let.");\r
  59                 wg.claim(current, p, o);\r
  60                 return this;\r
  61         }\r
  62 \r
  63         @Override\r
  64         public GraphWriter let(Resource p, Object value, Resource dataType) throws DatabaseException {\r
  65                 if(current == null)\r
  66                         throw new RuntimeException("Should call create or handle before let.");\r
  67                 Resource temp = wg.newResource();               \r
  68                 wg.claim(temp, l0.InstanceOf, null, dataType);\r
  69                 wg.claimValue(temp, value);\r
  70                 wg.claim(current, p, temp);\r
  71                 return this;\r
  72         }\r
  73 \r
  74         @Override\r
  75         public GraphWriter flush() throws DatabaseException {\r
  76                 wg.flushCluster();\r
  77                 return this;\r
  78         }\r
  79         \r
  80     @Override\r
  81     public GraphWriter createLiteral(Object value, Resource dataType) throws DatabaseException {\r
  82         current = wg.newResource();\r
  83         wg.claim(current, l0.InstanceOf, null, dataType);\r
  84         wg.claimValue(current, value);\r
  85         return this;\r
  86     }\r
  87 \r
  88     @Override\r
  89     public GraphWriter createInverse(Resource r) throws DatabaseException {\r
  90         current = wg.newResource();\r
  91         wg.claim(r, l0.InverseOf, current);\r
  92         return this;\r
  93     }\r
  94 \r
  95 }\r