Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / VirtualGraphObjectSource.java

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/VirtualGraphObjectSource.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/VirtualGraphObjectSource.java
new file mode 100644 (file)
index 0000000..0c159d1
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/VirtualGraphObjectSource.java
@@ -0,0 +1,93 @@
+/*******************************************************************************\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.db.common;\r
+\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.db.VirtualGraphContext;\r
+import org.simantics.db.VirtualGraphSource;\r
+import org.simantics.utils.datastructures.BijectionMap;\r
+import org.simantics.utils.datastructures.Pair;\r
+\r
+public abstract class VirtualGraphObjectSource implements VirtualGraphSource {\r
+\r
+    private BijectionMap<Object, Integer> hash = new BijectionMap<Object, Integer>();\r
+    \r
+    class ResourceObject {\r
+        public int id;\r
+        public ResourceObject(int id) {\r
+            this.id = id;\r
+        }\r
+        @Override\r
+        public int hashCode() {\r
+            return id;\r
+        }\r
+        @Override\r
+        public boolean equals(Object object) {\r
+            if (this == object)\r
+                return true;\r
+            else if (object == null)\r
+                return false;\r
+            else if (ResourceObject.class != object.getClass())\r
+                return false;\r
+            ResourceObject r = (ResourceObject)object;\r
+            return r.id == id;\r
+        }\r
+    }\r
+    \r
+//    protected void invalidate(VirtualGraphContext context, Object subject, Object predicate) {\r
+//        context.invalidate(getOrCreate(context, subject), getOrCreate(context, predicate));\r
+//    }\r
+\r
+//    protected Object getObject(VirtualGraphContext context, org.simantics.db.Resource resource) {\r
+//        int id = context.getIndex(resource);\r
+//        Object result = new Resource(id);\r
+//        hash.map(result, id);\r
+//        return result;\r
+//    }\r
+    \r
+//    private int getOrCreate(VirtualGraphContext context, Object object) {\r
+//        if(object instanceof org.simantics.db.Resource) return context.getIndex((org.simantics.db.Resource)object);\r
+//        Integer value = hash.getRight(object);\r
+//        if(value == null) {\r
+//            value = context.newResource();\r
+//            hash.map(object, value);\r
+//        }\r
+//        return value;\r
+//    }\r
+    \r
+    private Object existingOrResource(VirtualGraphContext context, int id) {\r
+        Object value = hash.getLeft(id);\r
+        if(value == null) return context.getResource(id);\r
+        else return value;\r
+    }\r
+\r
+//    @Override\r
+//    final public int[] getStatements(VirtualGraphContext context, int resource) {\r
+//        Object[] stms = getStatements(existingOrResource(context, resource));\r
+//        int[] result = new int[stms.length];\r
+//        for(int i=0;i<stms.length;i++) result[i] = getOrCreate(context, stms[i]);\r
+//        return result;\r
+//    }\r
+//\r
+//    @Override\r
+//    final public Pair<Object, Binding> getValue(VirtualGraphContext context, int resource) {\r
+//        return getValue(context, existingOrResource(context, resource));\r
+//    }\r
+    \r
+//    public org.simantics.db.Resource getResource(VirtualGraphContext context, Object virtual) {\r
+//        return (org.simantics.db.Resource)context.getResource(getOrCreate(context, virtual));\r
+//    }\r
+\r
+    abstract public Object[] getStatements(Object resource);\r
+    abstract public Pair<Object, Binding> getValue(VirtualGraphContext context, Object resource);\r
+    \r
+}\r