Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.history / src / org / simantics / history / HistorySamplerItem.java

diff --git a/bundles/org.simantics.history/src/org/simantics/history/HistorySamplerItem.java b/bundles/org.simantics.history/src/org/simantics/history/HistorySamplerItem.java
new file mode 100644 (file)
index 0000000..43577e4
--- /dev/null
+++ b/bundles/org.simantics.history/src/org/simantics/history/HistorySamplerItem.java
@@ -0,0 +1,67 @@
+package org.simantics.history;\r
+\r
+import org.simantics.databoard.accessor.StreamAccessor;\r
+import org.simantics.databoard.accessor.error.AccessorException;\r
+import org.simantics.history.util.StreamIterator;\r
+\r
+public class HistorySamplerItem implements Comparable<HistorySamplerItem> {\r
+       \r
+       Collector collector;\r
+       HistoryManager history;         // History source for this item\r
+       String historyItemId;\r
+\r
+       // State data\r
+       StreamAccessor accessor;                        // Stream accessor\r
+       public StreamIterator iter;\r
+    public int chartDataId;\r
+       \r
+       public HistorySamplerItem(Collector collector, HistoryManager history, String historyItemId, int identityHashCode) {\r
+               this.collector = collector;\r
+               this.history = history;\r
+               this.historyItemId = historyItemId;\r
+               this.chartDataId = identityHashCode;\r
+       }\r
+       \r
+       public void open() throws HistoryException {\r
+               accessor = history.openStream(historyItemId, "r");\r
+               iter = new StreamIterator( accessor );\r
+       }\r
+       \r
+       public void close() {\r
+               if (accessor!=null) {\r
+                       try {\r
+                               accessor.close();\r
+                       } catch (AccessorException e) {\r
+                       }\r
+               }\r
+               accessor = null;\r
+               iter = null;\r
+       }\r
+\r
+       @Override\r
+       public int compareTo(HistorySamplerItem o) {\r
+               int i;\r
+               i = historyItemId.compareTo(o.historyItemId);                   \r
+               if (i!=0) return i;\r
+               return 0;\r
+       }\r
+       \r
+       @Override\r
+       public int hashCode() {\r
+               int code = 0x2304;\r
+               code = 13*code + historyItemId.hashCode();\r
+               code = 13*code + history.hashCode();                    \r
+               return code;\r
+       }\r
+       \r
+       @Override\r
+       public boolean equals(Object obj) {\r
+               if ( obj == null ) return false;\r
+               if ( obj instanceof HistorySamplerItem == false ) return false;\r
+               HistorySamplerItem other = (HistorySamplerItem) obj;                    \r
+               if ( !other.history.equals(history) ) return false;\r
+               if ( !other.historyItemId.equals(historyItemId) ) return false;\r
+               return true;\r
+       }\r
+       \r
+}\r