Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.objmap2 / src / org / simantics / objmap / structural / rules / domain / RelatedObjectsAccessor.java

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/structural/rules/domain/RelatedObjectsAccessor.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/structural/rules/domain/RelatedObjectsAccessor.java
new file mode 100644 (file)
index 0000000..c56ffb6
--- /dev/null
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/structural/rules/domain/RelatedObjectsAccessor.java
@@ -0,0 +1,113 @@
+/*******************************************************************************\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.structural.rules.domain;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.List;\r
+\r
+import org.apache.log4j.Logger;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.objmap.exceptions.MappingException;\r
+import org.simantics.objmap.graph.rules.domain.IDomainAccessor;\r
+import org.simantics.objmap.graph.rules.domain.MappingUtils;\r
+import org.simantics.objmap.structural.StructuralResource;\r
+\r
+\r
+public class RelatedObjectsAccessor implements IDomainAccessor<StructuralResource,Collection<StructuralResource>> {\r
+\r
+    static Logger LOGGER = Logger.getLogger("org.simantics.objmap");\r
+    \r
+       Resource relation;\r
+       boolean deleteExtraObjects;\r
+       boolean useTypeResource;\r
+       \r
+       private boolean preventStructuralChanges = true;\r
+       private boolean preventStructuralRootChanges = true;\r
+\r
+       public RelatedObjectsAccessor(Resource relation, boolean deleteExtraObjects, boolean useTypeResource) {\r
+        super();\r
+        this.relation = relation;\r
+        this.deleteExtraObjects = deleteExtraObjects;\r
+        this.useTypeResource = useTypeResource;\r
+    }\r
+       \r
+       public RelatedObjectsAccessor(Resource relation, boolean deleteExtraObjects, boolean useTypeResource, boolean preventStructuralChanges, boolean preventStructuralRootChanges) {\r
+        super();\r
+        this.relation = relation;\r
+        this.deleteExtraObjects = deleteExtraObjects;\r
+        this.useTypeResource = useTypeResource;\r
+               this.preventStructuralChanges = preventStructuralChanges;\r
+               this.preventStructuralRootChanges = preventStructuralRootChanges;\r
+    }\r
+\r
+    @Override\r
+       public Collection<StructuralResource> get(ReadGraph g, StructuralResource element) throws MappingException {\r
+               try {\r
+                   LOGGER.info("        RelatedObjectsAccessor.get");\r
+                       \r
+                  \r
+                   Resource res = getServiceResource(g, element);\r
+                   if (res == null)\r
+                       return Collections.emptyList();\r
+                   Collection<Resource> coll = g.getObjects(res, relation);\r
+                       List<StructuralResource> result = new ArrayList<StructuralResource>(coll.size());\r
+                       for (Resource r : coll) {\r
+                               if (StructuralUtils.isStructuralInstance(g, r)) {\r
+                                       result.add(new StructuralResource(g, r, element.getContext(),r));\r
+                               } else {\r
+                                       result.add(new StructuralResource(g, r, element.getContext()));\r
+                               }\r
+                       }\r
+                       return result;\r
+               } catch (DatabaseException e) {\r
+                       throw new MappingException(e);\r
+               }\r
+       }\r
+    \r
+    private boolean preventChange(StructuralResource element) {\r
+       return preventStructuralChanges && element.isStructural() && (!element.isStructuralRoot()||preventStructuralRootChanges);       \r
+    }\r
+       \r
+       @Override\r
+       public boolean set(WriteGraph g, StructuralResource element, Collection<StructuralResource> value)\r
+                       throws MappingException {\r
+               try {\r
+                   LOGGER.info("        RelatedObjectsAccessor.set");\r
+                   Resource res = getServiceResource(g, element);\r
+                   if (res == null)\r
+                       return false;\r
+                   if (preventChange(element))\r
+                               return false;\r
+                   Resource[] arr = new Resource[value.size()];\r
+                   int i = 0; \r
+                   for (StructuralResource sr : value) {\r
+                       arr[i++] = sr.getResource();\r
+                   }\r
+                       return MappingUtils.synchronizeStatements(g, res, relation, \r
+                               arr, deleteExtraObjects);\r
+               } catch (DatabaseException e) {\r
+                       throw new MappingException(e);\r
+               }\r
+               \r
+       }\r
+\r
+       private Resource getServiceResource(ReadGraph g, StructuralResource element) {\r
+               if (!useTypeResource)\r
+                       return element.getResource();\r
+               return element.getTypeResource();\r
+       }\r
+}\r