1 files changed, 143 insertions, 0 deletions
diff --git a/qpid/java/broker-core/src/main/java/org/apache/qpid/server/queue/SortedQueueEntryImpl.java b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/queue/SortedQueueEntryImpl.java
new file mode 100644
index 0000000000..1052adbe67
--- /dev/null
+++ b/qpid/java/broker-core/src/main/java/org/apache/qpid/server/queue/SortedQueueEntryImpl.java
@@ -0,0 +1,143 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.qpid.server.queue;
+
+import org.apache.qpid.server.message.ServerMessage;
+
+/**
+ * An implementation of QueueEntryImpl to be used in SortedQueueEntryList.
+ */
+public class SortedQueueEntryImpl extends QueueEntryImpl
+{
+    public static enum Colour
+    {
+        RED, BLACK
+    };
+
+    private volatile SortedQueueEntryImpl _next;
+    private SortedQueueEntryImpl _prev;
+    private String _key;
+
+    private Colour _colour = Colour.BLACK;
+    private SortedQueueEntryImpl _parent;
+    private SortedQueueEntryImpl _left;
+    private SortedQueueEntryImpl _right;
+
+    public SortedQueueEntryImpl(final SortedQueueEntryList queueEntryList)
+    {
+        super(queueEntryList);
+    }
+
+    public SortedQueueEntryImpl(final SortedQueueEntryList queueEntryList,
+            final ServerMessage message, final long entryId)
+    {
+        super(queueEntryList, message, entryId);
+    }
+
+    @Override
+    public int compareTo(final QueueEntry o)
+    {
+        final String otherKey = ((SortedQueueEntryImpl) o)._key;
+        final int compare = _key == null ? (otherKey == null ? 0 : -1) : otherKey == null ? 1 : _key.compareTo(otherKey);
+        return compare == 0 ? super.compareTo(o) : compare;
+    }
+
+    public Colour getColour()
+    {
+        return _colour;
+    }
+
+    public String getKey()
+    {
+        return _key;
+    }
+
+    public SortedQueueEntryImpl getLeft()
+    {
+        return _left;
+    }
+
+    public SortedQueueEntryImpl getNextNode()
+    {
+        return _next;
+    }
+
+    @Override
+    public SortedQueueEntryImpl getNextValidEntry()
+    {
+        return getNextNode();
+    }
+
+    public SortedQueueEntryImpl getParent()
+    {
+        return _parent;
+    }
+
+    public SortedQueueEntryImpl getPrev()
+    {
+        return _prev;
+    }
+
+    public SortedQueueEntryImpl getRight()
+    {
+        return _right;
+    }
+
+    public void setColour(final Colour colour)
+    {
+        _colour = colour;
+    }
+
+    public void setKey(final String key)
+    {
+        _key = key;
+    }
+
+    public void setLeft(final SortedQueueEntryImpl left)
+    {
+        _left = left;
+    }
+
+    public void setNext(final SortedQueueEntryImpl next)
+    {
+        _next = next;
+    }
+
+    public void setParent(final SortedQueueEntryImpl parent)
+    {
+        _parent = parent;
+    }
+
+    public void setPrev(final SortedQueueEntryImpl prev)
+    {
+        _prev = prev;
+    }
+
+    public void setRight(final SortedQueueEntryImpl right)
+    {
+        _right = right;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "(" + (_colour == Colour.RED ? "Red," : "Black,") + _key + ")";
+    }
+}