Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.layer0.utils / src / org / simantics / layer0 / utils / instantiation / Instance.java

diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java
new file mode 100644 (file)
index 0000000..2312a06
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java
@@ -0,0 +1,104 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 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.layer0.utils.instantiation;\r
+\r
+import java.util.ArrayList;\r
+import java.util.List;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.common.utils.Literals;\r
+import org.simantics.db.common.utils.NameUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+\r
+public class Instance {\r
+    \r
+    public static class RelatedInstance {\r
+        Resource relation;\r
+        Instance instance;\r
+        int      cardinality;\r
+    }\r
+\r
+    public Resource              equals           = null;\r
+    public List<RelatedInstance> relatedInstances = new ArrayList<RelatedInstance>();\r
+    public Object                value            = null;\r
+\r
+    public Instance() {\r
+    }\r
+    \r
+    public Instance(Resource equals) {\r
+        this.equals = equals;\r
+    }\r
+    \r
+    public Resource instantiate(WriteGraph graph) throws DatabaseException {\r
+        if(equals != null)\r
+            return equals;\r
+        Resource ret = graph.newResource();        \r
+        for(RelatedInstance instance : relatedInstances)\r
+            for(int i=0;i<instance.cardinality;++i) \r
+                graph.claim(ret, instance.relation, \r
+                        instance.instance.instantiate(graph));\r
+        if(value != null)\r
+            graph.claimValue(ret, value);\r
+        return ret;\r
+    }\r
+    \r
+    public Resource instantiateUsing(WriteGraph graph, Resource resource) throws DatabaseException {\r
+        if(equals != null)\r
+            return equals;\r
+        Resource ret = resource;        \r
+        for(RelatedInstance instance : relatedInstances)\r
+            for(int i=0;i<instance.cardinality;++i) \r
+                graph.claim(ret, instance.relation, \r
+                        instance.instance.instantiate(graph));     \r
+        if(value != null)\r
+            graph.claimValue(ret, value);\r
+        return ret;\r
+    }   \r
+    \r
+    public void print(StringBuilder builder, int indentation, ReadGraph graph) throws DatabaseException {\r
+        ++ indentation;\r
+        if(equals != null) {\r
+            builder.append(NameUtils.getSafeName(graph, equals));\r
+        }\r
+        else {\r
+            if(value != null) {\r
+                builder.append(Literals.literalToString(value));\r
+                builder.append(" : ");\r
+            }\r
+            else \r
+                builder.append("* : ");        \r
+//            boolean first = true;            \r
+    \r
+            for(RelatedInstance instance : relatedInstances) {\r
+                builder.append("\n");\r
+                for(int i=0;i<indentation;++i)\r
+                    builder.append("    ");\r
+                builder.append(NameUtils.getSafeName(graph, instance.relation));\r
+                if(instance.cardinality != 1)\r
+                    builder.append("[" + instance.cardinality + "]");\r
+                builder.append(" = ");\r
+                instance.instance.print(builder, indentation, graph);\r
+            }\r
+\r
+        }\r
+    }\r
+    \r
+    public String toString(ReadGraph graph) throws DatabaseException {\r
+        StringBuilder builder = new StringBuilder();\r
+        print(builder, 0, graph);\r
+        return builder.toString();\r
+    }\r
+    \r
+}\r