[jboss-svn-commits] JBL Code SVN: r29424 - in labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query: filter and 1 other directory.

[jboss-svn-commits at lists.jboss.org]

Author: whitingjr
Date: 2009-09-21 13:07:38 -0400 (Mon, 21 Sep 2009)
New Revision: 29424

Added:
   labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/
   labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/DeletedEntityFilter.java
   labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/Filter.java
Log:
New classes to filter deleted entities.


Added: labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/DeletedEntityFilter.java
===================================================================
--- labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/DeletedEntityFilter.java	                        (rev 0)
+++ labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/DeletedEntityFilter.java	2009-09-21 17:07:38 UTC (rev 29424)
@@ -0,0 +1,84 @@
+ /*
+  * JBoss, Home of Professional Open Source
+  * Copyright 2005, JBoss Inc., and individual contributors as indicated
+  * by the @authors tag. See the copyright.txt in the distribution for a
+  * full listing of individual contributors.
+  *
+  * This is free software; you can redistribute it and/or modify it
+  * under the terms of the GNU Lesser General Public License as
+  * published by the Free Software Foundation; either version 2.1 of
+  * the License, or (at your option) any later version.
+  *
+  * This software is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  * Lesser General Public License for more details.
+  *
+  * You should have received a copy of the GNU Lesser General Public
+  * License along with this software; if not, write to the Free
+  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+  */
+
+package uk.ac.ncl.sdia.a8905943.stm.query.filter;
+
+import java.lang.reflect.Field;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.apache.log4j.Logger;
+
+import uk.ac.ncl.sdia.a8905943.handle.FieldUtils;
+import uk.ac.ncl.sdia.a8905943.handle.exception.FieldNotFoundException;
+
+/**
+ * This object filters all entities that have been marked as deleted.
+ * 
+ * @author <a href="whitingjr at hotmail.com">Jeremy Whiting</a>
+ * @version $Revision: 1.1 $
+ */
+public class DeletedEntityFilter implements Filter
+{
+   private final Set<Long> deletedEntityIds;
+   private static final Logger logger = Logger.getLogger(DeletedEntityFilter.class);
+
+   /**
+    * This filter method assumes all the objects in the collection
+    * parameter are of the same type.
+    */
+   @SuppressWarnings("unchecked")
+   @Override
+   public void filter(Collection collection)
+   {
+      if (null != collection && this.deletedEntityIds != null && !collection.isEmpty())
+      {
+         FieldUtils fieldUtils = new FieldUtils();
+         
+         Set filterSet = new HashSet();
+         for (Object entity : collection)
+         {// recurse over the collection to find a deleted entity
+            try
+            {
+               Field idField = fieldUtils.findIdField(entity.getClass());
+               if (this.deletedEntityIds.contains(fieldUtils.getValue(idField, entity)))
+               {// add the entity for deletetion, avoiding ConcurrentModificationException
+                  filterSet.add(entity);
+               }
+            }
+            catch (FieldNotFoundException fnfe)
+            {
+               logger.warn(fnfe.getMessage(), fnfe);
+            }
+         }
+         collection.removeAll(filterSet);
+      }
+   }
+
+   
+   public DeletedEntityFilter( Set<Long> deleted)
+   {
+      this.deletedEntityIds = deleted;
+   }
+
+}

Added: labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/Filter.java
===================================================================
--- labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/Filter.java	                        (rev 0)
+++ labs/jbosstm/workspace/whitingjr/trunk/MVCCSampleSTM/src/main/java/uk/ac/ncl/sdia/a8905943/stm/query/filter/Filter.java	2009-09-21 17:07:38 UTC (rev 29424)
@@ -0,0 +1,31 @@
+ /*
+  * JBoss, Home of Professional Open Source
+  * Copyright 2005, JBoss Inc., and individual contributors as indicated
+  * by the @authors tag. See the copyright.txt in the distribution for a
+  * full listing of individual contributors.
+  *
+  * This is free software; you can redistribute it and/or modify it
+  * under the terms of the GNU Lesser General Public License as
+  * published by the Free Software Foundation; either version 2.1 of
+  * the License, or (at your option) any later version.
+  *
+  * This software is distributed in the hope that it will be useful,
+  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  * Lesser General Public License for more details.
+  *
+  * You should have received a copy of the GNU Lesser General Public
+  * License along with this software; if not, write to the Free
+  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+  */
+
+package uk.ac.ncl.sdia.a8905943.stm.query.filter;
+
+import java.util.Collection;
+
+public interface Filter
+{
+   @SuppressWarnings("unchecked")
+   public void filter(Collection collection);
+}