X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2FVirtualGraphObjectSource.java;fp=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2FVirtualGraphObjectSource.java;h=0c159d1904075eb6afe86d69ccbe03dc8e1b986a;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

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
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+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/VirtualGraphObjectSource.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common;
+
+import org.simantics.databoard.binding.Binding;
+import org.simantics.db.VirtualGraphContext;
+import org.simantics.db.VirtualGraphSource;
+import org.simantics.utils.datastructures.BijectionMap;
+import org.simantics.utils.datastructures.Pair;
+
+public abstract class VirtualGraphObjectSource implements VirtualGraphSource {
+
+    private BijectionMap<Object, Integer> hash = new BijectionMap<Object, Integer>();
+    
+    class ResourceObject {
+        public int id;
+        public ResourceObject(int id) {
+            this.id = id;
+        }
+        @Override
+        public int hashCode() {
+            return id;
+        }
+        @Override
+        public boolean equals(Object object) {
+            if (this == object)
+                return true;
+            else if (object == null)
+                return false;
+            else if (ResourceObject.class != object.getClass())
+                return false;
+            ResourceObject r = (ResourceObject)object;
+            return r.id == id;
+        }
+    }
+    
+//    protected void invalidate(VirtualGraphContext context, Object subject, Object predicate) {
+//        context.invalidate(getOrCreate(context, subject), getOrCreate(context, predicate));
+//    }
+
+//    protected Object getObject(VirtualGraphContext context, org.simantics.db.Resource resource) {
+//        int id = context.getIndex(resource);
+//        Object result = new Resource(id);
+//        hash.map(result, id);
+//        return result;
+//    }
+    
+//    private int getOrCreate(VirtualGraphContext context, Object object) {
+//        if(object instanceof org.simantics.db.Resource) return context.getIndex((org.simantics.db.Resource)object);
+//        Integer value = hash.getRight(object);
+//        if(value == null) {
+//            value = context.newResource();
+//            hash.map(object, value);
+//        }
+//        return value;
+//    }
+    
+    private Object existingOrResource(VirtualGraphContext context, int id) {
+        Object value = hash.getLeft(id);
+        if(value == null) return context.getResource(id);
+        else return value;
+    }
+
+//    @Override
+//    final public int[] getStatements(VirtualGraphContext context, int resource) {
+//        Object[] stms = getStatements(existingOrResource(context, resource));
+//        int[] result = new int[stms.length];
+//        for(int i=0;i<stms.length;i++) result[i] = getOrCreate(context, stms[i]);
+//        return result;
+//    }
+//
+//    @Override
+//    final public Pair<Object, Binding> getValue(VirtualGraphContext context, int resource) {
+//        return getValue(context, existingOrResource(context, resource));
+//    }
+    
+//    public org.simantics.db.Resource getResource(VirtualGraphContext context, Object virtual) {
+//        return (org.simantics.db.Resource)context.getResource(getOrCreate(context, virtual));
+//    }
+
+    abstract public Object[] getStatements(Object resource);
+    abstract public Pair<Object, Binding> getValue(VirtualGraphContext context, Object resource);
+    
+}