--- /dev/null
+/*******************************************************************************\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.db.impl.query;\r
+\r
+import org.simantics.db.procedure.ListenerBase;\r
+\r
+class ListenerEntry {\r
+ \r
+ public static final Object NO_VALUE = new Object() {\r
+ \r
+ public String toString() { return "NO_VALUE"; };\r
+ \r
+ };\r
+ public static final Object NOT_CHANGED = new Object() {\r
+ \r
+ public String toString() { return "NOT_CHANGED"; };\r
+ \r
+ };\r
+ \r
+ public ListenerBase base;\r
+ public Object procedure;\r
+ public CacheEntry entry;\r
+ \r
+ private Object lastKnownResult;\r
+ \r
+ public ListenerEntry(CacheEntry entry, ListenerBase base, Object procedure) {\r
+ this.entry = entry;\r
+ this.base = base;\r
+ this.procedure = procedure;\r
+ if(entry.isReady()) {\r
+ this.lastKnownResult = entry.getResult();\r
+ } else {\r
+ this.lastKnownResult = NO_VALUE;\r
+ }\r
+ }\r
+ \r
+ public void setLastKnown(Object object) {\r
+ lastKnownResult = object;\r
+ }\r
+ \r
+ public Object getLastKnown() {\r
+ return lastKnownResult;\r
+ }\r
+\r
+ @Override\r
+ public String toString() {\r
+// return "[ListenerEntry last = " + lastKnownResult + ", procedure = " + procedure + "]";\r
+ return "[ListenerEntry " + ", procedure = " + procedure + " base=" + base + "]";\r
+ }\r
+ \r
+ @Override\r
+ public int hashCode() {\r
+ return base.hashCode();\r
+ }\r
+ \r
+ @Override\r
+ public boolean equals(Object obj) {\r
+\r
+ if(obj == this) return true;\r
+ if(obj == null) return false;\r
+ if(obj.getClass() != this.getClass()) return false;\r
+ ListenerEntry other = (ListenerEntry)obj;\r
+ return base.equals(other.base);\r
+ \r
+ }\r
+ \r
+}\r