1 files changed, 152 insertions, 0 deletions
diff --git a/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/codec/UnsignedLongWriter.java b/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/codec/UnsignedLongWriter.java
new file mode 100644
index 0000000000..4345187d61
--- /dev/null
+++ b/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/codec/UnsignedLongWriter.java
@@ -0,0 +1,152 @@
+/*
+ *
+ * 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.codec;
+
+import org.apache.qpid.amqp_1_0.type.UnsignedLong;
+
+import java.nio.ByteBuffer;
+
+public class UnsignedLongWriter implements ValueWriter<UnsignedLong>
+{
+
+
+    private static final byte EIGHT_BYTE_FORMAT_CODE = (byte) 0x80;
+    private static final byte ONE_BYTE_FORMAT_CODE = (byte) 0x53;
+    private static final byte ZERO_BYTE_FORMAT_CODE = (byte) 0x44;
+
+    private ValueWriter<UnsignedLong> _delegate;
+
+    private final FixedEightWriter<UnsignedLong> _eightByteWriter = new FixedEightWriter<UnsignedLong>()
+    {
+
+        @Override
+        byte getFormatCode()
+        {
+            return EIGHT_BYTE_FORMAT_CODE;
+        }
+
+        @Override
+        long convertValueToLong(UnsignedLong value)
+        {
+            return value.longValue();
+        }
+
+    };
+
+    private final ValueWriter<UnsignedLong> _oneByteWriter = new FixedOneWriter<UnsignedLong>()
+    {
+
+        @Override protected byte getFormatCode()
+        {
+            return ONE_BYTE_FORMAT_CODE;
+        }
+
+        @Override protected byte convertToByte(final UnsignedLong value)
+        {
+            return value.byteValue();
+        }
+    };
+
+    private final ValueWriter<UnsignedLong> _zeroByteWriter = new ValueWriter<UnsignedLong>()
+    {
+        private boolean _complete;
+
+
+        public int writeToBuffer(ByteBuffer buffer)
+        {
+
+            if(!_complete && buffer.hasRemaining())
+            {
+                buffer.put(ZERO_BYTE_FORMAT_CODE);
+                _complete = true;
+            }
+
+            return 1;
+        }
+
+        public void setValue(UnsignedLong ulong)
+        {
+            _complete = false;
+        }
+
+        public boolean isCacheable()
+        {
+            return true;
+        }
+
+        public boolean isComplete()
+        {
+            return _complete;
+        }
+
+    };
+
+
+
+    private static Factory<UnsignedLong> FACTORY = new Factory<UnsignedLong>()
+                                            {
+
+                                                public ValueWriter<UnsignedLong> newInstance(Registry registry)
+                                                {
+                                                    return new UnsignedLongWriter();
+                                                }
+                                            };
+
+    public static void register(ValueWriter.Registry registry)
+    {
+        registry.register(UnsignedLong.class, FACTORY);
+    }
+
+    public int writeToBuffer(final ByteBuffer buffer)
+    {
+        return _delegate.writeToBuffer(buffer);
+    }
+
+    public void setValue(final UnsignedLong ulong)
+    {
+        if(ulong.equals(UnsignedLong.ZERO))
+        {
+            _delegate = _zeroByteWriter;
+        }
+        else if(ulong.compareTo(UnsignedLong.valueOf(256))<0)
+        {
+            _delegate = _oneByteWriter;
+        }
+        else
+        {
+            _delegate = _eightByteWriter;
+        }
+
+        _delegate.setValue(ulong);
+    }
+
+    public boolean isComplete()
+    {
+        return _delegate.isComplete();
+    }
+
+    public boolean isCacheable()
+    {
+        return false;
+    }
+
+}
+\ No newline at end of file