1 files changed, 85 insertions, 0 deletions
diff --git a/qpid/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/framing/AMQPProtocolHeaderHandler.java b/qpid/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/framing/AMQPProtocolHeaderHandler.java
new file mode 100644
index 0000000000..007df77f55
--- /dev/null
+++ b/qpid/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/framing/AMQPProtocolHeaderHandler.java
@@ -0,0 +1,85 @@
+/*
+ *
+ * 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.amqp_1_0.framing;
+
+import org.apache.qpid.amqp_1_0.codec.ProtocolHandler;
+import org.apache.qpid.amqp_1_0.transport.ConnectionEndpoint;
+
+import java.nio.ByteBuffer;
+
+public class AMQPProtocolHeaderHandler implements ProtocolHandler
+{
+    private ConnectionEndpoint _connection;
+    private static final byte MAJOR_VERSION = (byte) 1;
+    private static final byte MINOR_VERSION = (byte) 0;
+
+    enum State {
+        AWAITING_MAJOR,
+        AWAITING_MINOR,
+        AWAITING_REVISION,
+        ERROR
+    }
+
+    private State _state = State.AWAITING_MAJOR;
+
+    public AMQPProtocolHeaderHandler(final ConnectionEndpoint connection)
+    {
+        _connection = connection;
+    }
+
+    public ProtocolHandler parse(final ByteBuffer in)
+    {
+        while(in.hasRemaining() && _state != State.ERROR)
+        {
+            switch(_state)
+            {
+                case AWAITING_MAJOR:
+                    _state = in.get() == MAJOR_VERSION ? State.AWAITING_MINOR : State.ERROR;
+                    if(!in.hasRemaining())
+                    {
+                        break;
+                    }
+                case AWAITING_MINOR:
+                    _state = in.get() == MINOR_VERSION ? State.AWAITING_MINOR : State.ERROR;
+                    if(!in.hasRemaining())
+                    {
+                        break;
+                    }
+                case AWAITING_REVISION:
+                    byte revision = in.get();
+                    _connection.protocolHeaderReceived(MAJOR_VERSION, MINOR_VERSION, revision);
+                    ProtocolHandler handler = new FrameHandler(_connection);
+                    return handler.parse(in);
+            }
+        }
+        if(_state == State.ERROR)
+        {
+            _connection.invalidHeaderReceived();
+        }
+        return this;
+
+    }
+
+    public boolean isDone()
+    {
+        return _state != State.ERROR && !_connection.closedForInput();
+    }
+}