Author: toad
Date: 2008-06-20 16:38:50 +0000 (Fri, 20 Jun 2008)
New Revision: 20531
Added:
branches/db4o/freenet/src/freenet/support/Db4oSet.java
Log:
Missed Db4oSet
Added: branches/db4o/freenet/src/freenet/support/Db4oSet.java
===================================================================
--- branches/db4o/freenet/src/freenet/support/Db4oSet.java
(rev 0)
+++ branches/db4o/freenet/src/freenet/support/Db4oSet.java 2008-06-20
16:38:50 UTC (rev 20531)
@@ -0,0 +1,78 @@
+package freenet.support;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Set;
+
+import com.db4o.ObjectContainer;
+import com.db4o.types.Db4oMap;
+
+public class Db4oSet implements Set {
+
+ private final Db4oMap map;
+ private final NullObject object = new NullObject();
+
+ Db4oSet(ObjectContainer container, int size) {
+ map = container.ext().collections().newHashMap(size);
+ }
+
+ public boolean add(Object arg0) {
+ // Avoid unnecessary modification.
+ if(map.containsKey(arg0)) return false;
+ map.put(arg0, object);
+ return true;
+ }
+
+ public boolean addAll(Collection arg0) {
+ throw new UnsupportedOperationException();
+ }
+
+ public void clear() {
+ map.clear();
+ }
+
+ public boolean contains(Object key) {
+ return map.containsKey(key);
+ }
+
+ public boolean containsAll(Collection arg0) {
+ throw new UnsupportedOperationException();
+ }
+
+ public boolean isEmpty() {
+ return map.isEmpty();
+ }
+
+ public Iterator iterator() {
+ Set keys = map.keySet();
+ return keys.iterator();
+ }
+
+ public boolean remove(Object key) {
+ return map.remove(key) != null;
+ }
+
+ public boolean removeAll(Collection arg0) {
+ throw new UnsupportedOperationException();
+ }
+
+ public boolean retainAll(Collection arg0) {
+ throw new UnsupportedOperationException();
+ }
+
+ public int size() {
+ return map.size();
+ }
+
+ public Object[] toArray() {
+ return map.keySet().toArray();
+ }
+
+ public Object[] toArray(Object[] arg0) {
+ return map.keySet().toArray(arg0);
+ }
+
+ public void objectOnActivate(ObjectContainer container) {
+ container.activate(map, 1);
+ }
+}
