HCOLL-164 Made ChronicleSet zero overhead by value; fixed ChronicleSet.add() and remove() implementations; added ChronicleMapBuilder.valueMarshallerAndFactory(AgileBytesMarshaller, ObjectFactory) method

src/main/java/net/openhft/chronicle/set/SetFromMap.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright 2014 Higher Frequency Trading http://www.higherfrequencytrading.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.openhft.chronicle.set;
+
+import net.openhft.chronicle.map.ChronicleMap;
+import net.openhft.chronicle.map.ChronicleSet;
+
+import java.io.IOException;
+import java.io.Serializable;
+import java.util.AbstractSet;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Set;
+
+import static net.openhft.chronicle.set.DummyValue.DUMMY_VALUE;
+
+class SetFromMap<E> extends AbstractSet<E>
+        implements ChronicleSet<E>, Serializable {
+
+    private final ChronicleMap<E, DummyValue> m;  // The backing map
+    private transient Set<E> s;       // Its keySet
+
+    SetFromMap(ChronicleMap<E, DummyValue> map) {
+        if (!map.isEmpty())
+            throw new IllegalArgumentException("Map is non-empty");
+        m = map;
+        s = map.keySet();
+    }
+
+    public void clear() {
+        m.clear();
+    }
+
+    public int size() {
+        return m.size();
+    }
+
+    public boolean isEmpty() {
+        return m.isEmpty();
+    }
+
+    public boolean contains(Object o) {
+        return m.containsKey(o);
+    }
+
+    public boolean remove(Object o) {
+        return m.remove(o) == DUMMY_VALUE;
+    }
+
+    public boolean add(E e) {
+        return m.putIfAbsent(e, DUMMY_VALUE) == null;
+    }
+
+    public Iterator<E> iterator() {
+        return s.iterator();
+    }
+
+    public Object[] toArray() {
+        return s.toArray();
+    }
+
+    public <T> T[] toArray(T[] a) {
+        return s.toArray(a);
+    }
+
+    public String toString() {
+        return s.toString();
+    }
+
+    public int hashCode() {
+        return s.hashCode();
+    }
+
+    public boolean equals(Object o) {
+        return o == this || s.equals(o);
+    }
+
+    public boolean containsAll(Collection<?> c) {
+        return s.containsAll(c);
+    }
+
+    public boolean removeAll(Collection<?> c) {
+        return s.removeAll(c);
+    }
+
+    public boolean retainAll(Collection<?> c) {
+        return s.retainAll(c);
+    }
+    // addAll is the only inherited implementation
+
+    private static final long serialVersionUID = 2454657854757543876L;
+
+    private void readObject(java.io.ObjectInputStream stream)
+            throws IOException, ClassNotFoundException {
+        stream.defaultReadObject();
+        s = m.keySet();
+    }
+
+    @Override
+    public long longSize() {
+        return m.longSize();
+    }
+
+    @Override
+    public void close() throws IOException {
+        m.close();
+    }
+}