Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.procore / src / fi / vtt / simantics / procore / internal / RandomAccessValueSupportImpl.java

diff --git a/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/RandomAccessValueSupportImpl.java b/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/RandomAccessValueSupportImpl.java
new file mode 100644 (file)
index 0000000..c9e55af
--- /dev/null
+++ b/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/RandomAccessValueSupportImpl.java
@@ -0,0 +1,102 @@
+package fi.vtt.simantics.procore.internal;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.HashMap;\r
+import java.util.Map;\r
+\r
+import org.simantics.db.Disposable;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.impl.internal.RandomAccessValueSupport;\r
+import org.simantics.db.impl.internal.ResourceData;\r
+import org.simantics.utils.datastructures.Pair;\r
+\r
+/**\r
+ * A simple implementation of {@link RandomAccessValueSupport}.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class RandomAccessValueSupportImpl implements RandomAccessValueSupport {\r
+\r
+    private final static boolean DEBUG = false;\r
+\r
+    /**\r
+     * The map of services maintained by the workbench window. These services\r
+     * are initialized during workbench window during the\r
+     * {@link #configureShell(Shell)}. This value is <code>null</code> until\r
+     * a service is registered.\r
+     */\r
+    private Map<Resource, ResourceData> values = new HashMap<Resource, ResourceData>();\r
+\r
+    /**\r
+     * Constructs a new random access value registry.\r
+     */\r
+    public RandomAccessValueSupportImpl() {\r
+    }\r
+\r
+    @Override\r
+    public ResourceData get(Resource resource) {\r
+        synchronized (this) {\r
+            return values.get(resource);\r
+        }\r
+    }\r
+\r
+    /**\r
+     * Registers a service with this locator. If there is an existing service\r
+     * matching the same <code>api</code> and it implements\r
+     * {@link Disposable}, it will be disposed.\r
+     * \r
+     * @param api\r
+     *            This is the interface that the service implements. Must not be\r
+     *            <code>null</code>.\r
+     * @param service\r
+     *            The service to register. This must be some implementation of\r
+     *            <code>api</code>. This value must not be <code>null</code>.\r
+     */\r
+    public void put(final Resource resource, final ResourceData data) {\r
+        synchronized (this) {\r
+            final ResourceData current = values.get(resource);\r
+            if (current != null)\r
+                throw new IllegalStateException(\r
+                        "Value already registered for resource " + resource\r
+                        + ": " + current + ". Tried to register "\r
+                        + data);\r
+\r
+            if (DEBUG)\r
+                System.out.println(this + ": register " + resource + " -> " + data);\r
+\r
+            values.put(resource, data);\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public Collection<Pair<Resource, ResourceData>> entries() {\r
+        synchronized (this) {\r
+            if (values.isEmpty())\r
+                return Collections.emptyList();\r
+            Collection<Pair<Resource, ResourceData>> result = new ArrayList<Pair<Resource, ResourceData>>( values.size() );\r
+            for (Map.Entry<Resource, ResourceData> entry : values.entrySet()) {\r
+                result.add( Pair.make( entry.getKey(), entry.getValue() ) );\r
+            }\r
+            return result;\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public Collection<Pair<Resource, ResourceData>> removeAll() {\r
+        synchronized (this) {\r
+            if (values.isEmpty())\r
+                return Collections.emptyList();\r
+            if (DEBUG)\r
+                System.out.println(this + ": remove " + values.size() + " registrations");\r
+            Collection<Pair<Resource, ResourceData>> result = new ArrayList<Pair<Resource, ResourceData>>( values.size() );\r
+            for (Map.Entry<Resource, ResourceData> entry : values.entrySet()) {\r
+                result.add( Pair.make( entry.getKey(), entry.getValue() ) );\r
+            }\r
+            values.clear();\r
+            return result;\r
+        }\r
+    }\r
+\r
+}\r