Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / adapter / DisposableListener.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/DisposableListener.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/DisposableListener.java
new file mode 100644 (file)
index 0000000..1405b17
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/DisposableListener.java
@@ -0,0 +1,48 @@
+/*******************************************************************************\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.diagram.adapter;\r
+\r
+import org.simantics.db.common.procedure.adapter.ListenerSupport;\r
+import org.simantics.db.procedure.Listener;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ *\r
+ * @param <T>\r
+ */\r
+public abstract class DisposableListener<T> implements Listener<T> {\r
+\r
+    private final ListenerSupport support;\r
+    private boolean               disposed = false;\r
+\r
+    public DisposableListener(ListenerSupport support) {\r
+        this.support = support;\r
+    }\r
+\r
+    /**\r
+     * Forcefully and irreversibly dispose this listener.\r
+     */\r
+    public void disposeListener() {\r
+        disposed = true;\r
+    }\r
+\r
+    @Override\r
+    public void exception(Throwable t) {\r
+        support.exception(t);\r
+    }\r
+\r
+    @Override\r
+    public boolean isDisposed() {\r
+        return disposed || support.isDisposed();\r
+    }\r
+\r
+}
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