Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.simulation / src / org / simantics / simulation / data / AbstractDatasource.java

diff --git a/bundles/org.simantics.simulation/src/org/simantics/simulation/data/AbstractDatasource.java b/bundles/org.simantics.simulation/src/org/simantics/simulation/data/AbstractDatasource.java
new file mode 100644 (file)
index 0000000..3814b6c
--- /dev/null
+++ b/bundles/org.simantics.simulation/src/org/simantics/simulation/data/AbstractDatasource.java
@@ -0,0 +1,62 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.\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.simulation.data;\r
+\r
+import java.util.concurrent.locks.Lock;\r
+import java.util.concurrent.locks.ReentrantLock;\r
+\r
+import org.simantics.utils.datastructures.ListenerList;\r
+\r
+/**\r
+ * @author Toni Kalajainen\r
+ */\r
+public abstract class AbstractDatasource implements Datasource {\r
+\r
+    protected ListenerList<DatasourceListener> listeners = new ListenerList<DatasourceListener>(DatasourceListener.class);\r
+    protected Lock readLock, writeLock;\r
+\r
+    public AbstractDatasource() {\r
+//        ReentrantReadWriteLock l = new ReentrantReadWriteLock();\r
+//        this.readLock = l.readLock();\r
+//        this.writeLock = l.writeLock();\r
+        this.readLock = this.writeLock = new ReentrantLock();\r
+    }\r
+\r
+    @Override\r
+    public void addListener(DatasourceListener listener) {\r
+        listeners.add(listener);\r
+    }\r
+\r
+    @Override\r
+    public void removeListener(DatasourceListener listener) {\r
+        listeners.remove(listener);\r
+    }\r
+\r
+    protected void notifyStep() {\r
+        for (final DatasourceListener l : listeners.getListeners()) {\r
+            if (l.getExecutor() == null) {\r
+                l.onStep( AbstractDatasource.this );\r
+            } else {\r
+                l.getExecutor().execute(new Runnable() {\r
+                    public void run() {\r
+                        l.onStep(AbstractDatasource.this);\r
+                    }\r
+                });\r
+            }\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public Lock readLock() {\r
+        return readLock;\r
+    }\r
+\r
+}\r