1 files changed, 178 insertions, 0 deletions
diff --git a/java/rasj/odmg/RasBag.java b/java/rasj/odmg/RasBag.java
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+++ b/java/rasj/odmg/RasBag.java
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+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/** ***********************************************************
+ * <pre>
+ *
+ * PURPOSE:
+ *
+ *
+ *
+ * COMMENTS:
+ *
+ * </pre>
+ *********************************************************** */
+
+package rasj.odmg;
+
+import org.odmg.*;
+import rasj.global.*;
+import java.util.*;
+
+/**
+ * This class implements the ODMG DBag interface.
+ * @version $Revision: 1.3 $
+ */
+public class RasBag extends RasCollection implements DBag
+  {
+    static final String rcsid = "@(#)Package rasj.odmg, class RasBag: $Header: /home/rasdev/CVS-repository/rasdaman/java/rasj/odmg/RasBag.java,v 1.3 2003/12/19 15:42:56 rasdev Exp $";
+
+    List content;
+
+    /**
+     * constructor
+     */
+    public RasBag()
+      {
+        Debug.enterVerbose( "RasBag.constructor start." );
+        content = new ArrayList();
+        Debug.leaveVerbose( "RasBag.constructor done." );
+      }
+
+    /**
+     * Appends the specified element to this Bag.
+     */
+    public boolean add(Object o)
+      {
+        boolean result = content.add(o);
+        Debug.talkVerbose( "RasBag.add: result=" + result );
+        return result;
+      }
+
+    /**
+     * This method returns the number of occurrences of the object obj in the DBag collection.
+     */
+    public int occurrences(java.lang.Object obj)
+      {
+        Debug.enterVerbose( "RasBag.occurrences start." );
+
+        DBag tmpBag = new RasBag();
+        tmpBag.addAll(content);
+        int count = 0;
+        while(tmpBag.contains(obj))
+          {
+            count++;
+            tmpBag.remove(obj);
+          }
+
+        Debug.leaveVerbose( "RasBag.occurrences done. count=" + count );
+        return count;
+      }
+
+    /**
+     * A new DBag instance is created that contains the difference of this object and the DBag instance referenced by otherBag.
+     */
+    public DBag difference(DBag otherBag)
+      {
+        Debug.enterVerbose( "RasBag.difference start." );
+
+        DBag diffBag = new RasBag();
+        diffBag.addAll(otherBag);
+        DBag retBag = new RasBag();
+        Iterator it = content.iterator();
+        Object tmp;
+        while(it.hasNext())
+          {
+            tmp = it.next();
+            if(!diffBag.contains(tmp))
+                retBag.add(tmp);
+            else
+                diffBag.remove(tmp);
+          }
+        retBag.addAll(diffBag);
+
+        Debug.leaveVerbose( "RasBag.difference done." );
+        return retBag;
+      }
+
+    /**
+     * A new DBag instance is created that contains the intersection of this object and the DBag referenced by otherBag.
+     */
+    public DBag intersection(DBag otherBag)
+      {
+        Debug.enterVerbose( "RasBag.intersection start." );
+
+        DBag intBag = new RasBag();
+        intBag.addAll(otherBag);
+        DBag retBag = new RasBag();
+        Iterator it = content.iterator();
+        Object tmp;
+        while(it.hasNext())
+          {
+            tmp = it.next();
+            if(intBag.contains(tmp))
+              {
+                retBag.add(tmp);
+                intBag.remove(tmp);
+              }
+          }
+
+        Debug.leaveVerbose( "RasBag.intersection done." );
+        return retBag;
+      }
+
+    /**
+     * A new DBag instance is created that is the union of this object and otherBag.
+     */
+    public DBag union(DBag otherBag)
+      {
+        Debug.enterVerbose( "RasBag.union start." );
+
+        DBag retBag = new RasBag();
+        retBag.addAll(content);
+        retBag.addAll(otherBag);
+
+        Debug.leaveVerbose( "RasBag.union done." );
+        return retBag;
+      }
+
+    /**
+     * Returns an iterator over the elements in this Bag in proper sequence.
+     */
+    public Iterator iterator()
+      {
+        Debug.talkVerbose( "RasBag.iterator." );
+        return content.iterator();
+      }
+
+    /**
+     * Returns the number of elements in this Bag.
+     */
+    public int size()
+      {
+        int result = content.size();
+        Debug.talkVerbose( "RasBag.size: size=" + result );
+        return result;
+      }
+
+} // RasBag
+