Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.common / src / org / simantics / browsing / ui / common / internal / IGECache.java

diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/IGECache.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/IGECache.java
new file mode 100644 (file)
index 0000000..0503ba1
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/IGECache.java
@@ -0,0 +1,122 @@
+/*******************************************************************************\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.browsing.ui.common.internal;\r
+\r
+import gnu.trove.set.hash.THashSet;\r
+\r
+import java.util.Collection;\r
+import java.util.Set;\r
+\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.NodeContext.CacheKey;\r
+\r
+public interface IGECache {\r
+\r
+    interface IGECacheEntry {\r
+        Object getValue();\r
+        void setValue(Object value);\r
+//        Collection<NodeQueryUpdater> getDependencies();\r
+//        void addDependency(NodeQueryUpdater caller);\r
+        NodeContext getContext();\r
+        CacheKey<?> getKey();\r
+        Collection<IGECacheEntry> getDependencies();\r
+        void addDependency(IGECacheEntry caller);\r
+        void reset();\r
+    }\r
+\r
+    class GECacheEntry implements IGECacheEntry {\r
+\r
+        private Object result;\r
+        final private NodeContext context;\r
+        final private CacheKey<?> key;\r
+        private Set<IGECacheEntry> callers = new THashSet<IGECacheEntry>(2);\r
+\r
+        public <T> GECacheEntry(NodeContext context, CacheKey<T> key, T result) {\r
+            this.context = context;\r
+            this.key = key;\r
+            this.result = result;\r
+        }\r
+        @Override\r
+        public Collection<IGECacheEntry> getDependencies() {\r
+            return callers;\r
+        }\r
+        @Override\r
+        public Object getValue() {\r
+            return result;\r
+        }\r
+        @Override\r
+        public void addDependency(IGECacheEntry caller) {\r
+            assert(caller != null);\r
+            callers.add(caller);\r
+        }\r
+        @Override\r
+        public void setValue(Object value) {\r
+            result = value;\r
+        }\r
+        @Override\r
+        public NodeContext getContext() {\r
+            return context;\r
+        }\r
+        @Override\r
+        public CacheKey<?> getKey() {\r
+            return key;\r
+        }\r
+        @Override\r
+        public void reset() {\r
+            callers = new THashSet<IGECacheEntry>(2);\r
+        }\r
+\r
+        @Override\r
+        public int hashCode() {\r
+            return 31 * context.hashCode() | key.hashCode();\r
+        }\r
+\r
+        @Override\r
+        public boolean equals(Object object) {\r
+\r
+            if (this == object)\r
+                return true;\r
+            else if (object == null)\r
+                return false;\r
+            else if (getClass() != object.getClass())\r
+                return false;\r
+\r
+            GECacheEntry i = (GECacheEntry)object;\r
+\r
+            return key.equals(i.key) && context.equals(i.context);\r
+\r
+        }\r
+\r
+//        @Override\r
+//        public String toString() {\r
+//            return "GECacheEntry[" + result + ", " + context + ", " + key + "]";\r
+//        }\r
+\r
+    }\r
+\r
+    <T> IGECacheEntry getEntry(NodeContext context, CacheKey<T> key);\r
+\r
+    <T> IGECacheEntry put(NodeContext context, CacheKey<T> key, T value);\r
+    <T> void putTreeReference(NodeContext context, CacheKey<T> key, UIElementReference reference);\r
+\r
+    <T> T get(NodeContext context, CacheKey<T> key);\r
+    <T> Set<UIElementReference> getTreeReference(NodeContext context, CacheKey<T> key);\r
+\r
+    <T> void remove(NodeContext context, CacheKey<T> key);\r
+    <T> Set<UIElementReference> removeTreeReference(NodeContext context, CacheKey<T> key);\r
+    \r
+    boolean isShown(NodeContext context);\r
+    void incRef(NodeContext context);\r
+    void decRef(NodeContext context);\r
+    \r
+    void dispose();\r
+}\r