1 files changed, 108 insertions, 0 deletions
diff --git a/qpid/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/codec/FixedEightWriter.java b/qpid/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/codec/FixedEightWriter.java
new file mode 100644
index 0000000000..c9cc0b72c3
--- /dev/null
+++ b/qpid/java/amqp-1-0-common/src/main/java/org/apache/qpid/amqp_1_0/codec/FixedEightWriter.java
@@ -0,0 +1,108 @@
+/*
+ *
+ * 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 java.nio.ByteBuffer;
+
+public abstract class FixedEightWriter<T extends Object> implements ValueWriter<T>
+{
+    private int _written = 9;
+    private long _value;
+
+    public final int writeToBuffer(ByteBuffer buffer)
+    {
+        int remaining = buffer.remaining();
+        int written = _written;
+        switch(written)
+        {
+            case 0:
+                if(buffer.hasRemaining())
+                {
+                    buffer.put(getFormatCode());
+                    remaining--;
+                    written = 1;
+                }
+                else
+                {
+                    break;
+                }
+            case 1:
+                if(remaining>=8)
+                {
+                    buffer.putLong(_value);
+                    written = 9;
+                    break;
+                }
+            case 2:
+            case 3:
+            case 4:
+            case 5:
+                if(remaining >= 4)
+                {
+                    buffer.putInt((int)((_value >> ((5-written)<<3)) & 0xFFFFFFFF ));
+                    remaining-=4;
+                    written+=4;
+                }
+            case 6:
+            case 7:
+                if(remaining >= 2 && written <= 7)
+                {
+                    buffer.putShort((short)((_value >> ((7-written)<<3)) & 0xFFFF ));
+                    remaining -= 2;
+                    written += 2;
+                }
+            case 8:
+                if(remaining >=1 && written != 9)
+                {
+                    buffer.put((byte)((_value >> ((8-written)<<3)) & 0xFF ));
+                    written++;
+                }
+
+
+        }
+        _written = written;
+
+        return 9;
+    }
+
+    abstract byte getFormatCode();
+
+    public final void setValue(T value)
+    {
+        _written = 0;
+        _value = convertValueToLong(value);
+    }
+
+    abstract long convertValueToLong(T value);
+
+    public boolean isCacheable()
+    {
+        return true;
+    }
+
+    public final boolean isComplete()
+    {
+        return _written == 9;
+    }
+
+
+}
+\ No newline at end of file