--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2013 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.objmap.graph.rules.domain;\r
+\r
+import java.util.Arrays;\r
+\r
+import org.apache.log4j.Logger;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Statement;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.Layer0;\r
+import org.simantics.objmap.exceptions.MappingException;\r
+\r
+/**\r
+ * Accesses a value attached to the element by given functional relation.\r
+ * @author Hannu Niemist�\r
+ */\r
+public class RelatedValueAccessor implements IDomainAccessor<Resource,Object> {\r
+\r
+ static Logger LOGGER = Logger.getLogger("org.simantics.objmap");\r
+ \r
+ Resource relation;\r
+ Resource valueType;\r
+\r
+ public RelatedValueAccessor(Resource relation, Resource valueType) {\r
+ this.relation = relation;\r
+ this.valueType = valueType;\r
+ }\r
+\r
+ @Override\r
+ public Object get(ReadGraph g, Resource element) throws MappingException {\r
+ try {\r
+ LOGGER.info(" RelatedValueAccessor.get");\r
+ Resource valueResource = g.getPossibleObject(element, relation);\r
+ if(valueResource == null)\r
+ return null;\r
+ return g.getValue(valueResource);\r
+ } catch (DatabaseException e) {\r
+ throw new MappingException(e);\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public boolean set(WriteGraph g, Resource element, Object value)\r
+ throws MappingException {\r
+ try {\r
+ LOGGER.info(" RelatedValueAccessor.set");\r
+ Statement valueStatement = g.getPossibleStatement(element, relation);\r
+ if(valueStatement == null) {\r
+ if(value == null)\r
+ return false;\r
+ Resource valueResource = g.newResource();\r
+ g.claim(valueResource, Layer0.getInstance(g).InstanceOf, null,\r
+ valueType);\r
+ g.claim(element, relation, valueResource);\r
+ g.claimValue(valueResource, value); \r
+ return true;\r
+ }\r
+ else {\r
+ if(value == null) {\r
+ if (!valueStatement.isAsserted(element)) {\r
+ g.deny(valueStatement.getObject());\r
+ return true;\r
+ } else {\r
+ return false;\r
+ }\r
+ } \r
+ Object currentValue = g.getValue(valueStatement.getObject());\r
+ if(equals(currentValue,value))\r
+ return false;\r
+ if (!valueStatement.isAsserted(element))\r
+ g.claimValue(valueStatement.getObject(), value);\r
+ else {\r
+ Resource valueResource = g.newResource();\r
+ g.claim(valueResource, Layer0.getInstance(g).InstanceOf, null,\r
+ valueType);\r
+ g.claim(element, relation, valueResource);\r
+ g.claimValue(valueResource, value);\r
+ }\r
+ return true;\r
+ }\r
+ } catch (DatabaseException e) {\r
+ throw new MappingException(e);\r
+ }\r
+ \r
+ }\r
+ \r
+ private boolean equals(Object o1, Object o2) {\r
+ if (o1 instanceof boolean[])\r
+ Arrays.equals((boolean[])o1,(boolean[])o2);\r
+ if (o1 instanceof int[])\r
+ Arrays.equals((int[])o1,(int[])o2);\r
+ if (o1 instanceof float[])\r
+ Arrays.equals((float[])o1,(float[])o2);\r
+ if (o1 instanceof double[])\r
+ Arrays.equals((double[])o1,(double[])o2);\r
+ if (o1 instanceof byte[])\r
+ Arrays.equals((byte[])o1,(byte[])o2);\r
+ return o1.equals(o2);\r
+ \r
+ }\r
+\r
+}\r