--- /dev/null
+/*******************************************************************************\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