Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.document.server / src / org / simantics / document / server / DocumentHistoryListener.java

diff --git a/bundles/org.simantics.document.server/src/org/simantics/document/server/DocumentHistoryListener.java b/bundles/org.simantics.document.server/src/org/simantics/document/server/DocumentHistoryListener.java
new file mode 100644 (file)
index 0000000..ca4adef
--- /dev/null
+++ b/bundles/org.simantics.document.server/src/org/simantics/document/server/DocumentHistoryListener.java
@@ -0,0 +1,51 @@
+package org.simantics.document.server;\r
+\r
+import java.util.List;\r
+\r
+import org.simantics.Logger;\r
+import org.simantics.db.procedure.Listener;\r
+\r
+public class DocumentHistoryListener implements Listener<List<JSONObject>> {\r
+\r
+       final private DocumentHistory history;\r
+    \r
+    private boolean disposed = false;\r
+\r
+    DocumentHistoryListener(DocumentHistory history) {\r
+        this.history = history;\r
+    }\r
+\r
+    @Override\r
+    public void execute(List<JSONObject> result) {\r
+       \r
+       synchronized(history) {\r
+\r
+                       history.refresh(result);\r
+               if(!history.hasListeners()) {\r
+                       history.removeUpdater();\r
+                       disposed = true;\r
+               }\r
+               \r
+       }\r
+        \r
+    }\r
+\r
+    @Override\r
+    public void exception(Throwable t) {\r
+       Logger.defaultLogError(t);\r
+    }\r
+    \r
+    @Override\r
+    public boolean isDisposed() {\r
+       if(!disposed) {\r
+               synchronized(history) {\r
+                       if(!history.hasListeners()) {\r
+                               history.removeUpdater();\r
+                               disposed = true;\r
+                       }\r
+               }\r
+       }\r
+        return disposed;\r
+    }\r
+\r
+}\r