1 files changed, 179 insertions, 0 deletions
diff --git a/trunk/qpid/java/common/src/main/java/org/apache/qpid/framing/AMQTypedValue.java b/trunk/qpid/java/common/src/main/java/org/apache/qpid/framing/AMQTypedValue.java
new file mode 100644
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+++ b/trunk/qpid/java/common/src/main/java/org/apache/qpid/framing/AMQTypedValue.java
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+/*
+ *
+ * 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.framing;
+
+import org.apache.mina.common.ByteBuffer;
+
+import java.util.Date;
+import java.util.Map;
+import java.math.BigDecimal;
+
+/**
+ * AMQTypedValue combines together a native Java Object value, and an {@link AMQType}, as a fully typed AMQP parameter
+ * value. It provides the ability to read and write fully typed parameters to and from byte buffers. It also provides
+ * the ability to create such parameters from Java native value and a type tag or to extract the native value and type
+ * from one.
+ *
+ * <p/><table id="crc"><caption>CRC Card</caption>
+ * <tr><th> Responsibilities <th> Collaborations
+ * <tr><td> Create a fully typed AMQP value from a native type and a type tag. <td> {@link AMQType}
+ * <tr><td> Create a fully typed AMQP value from a binary representation in a byte buffer. <td> {@link AMQType}
+ * <tr><td> Write a fully typed AMQP value to a binary representation in a byte buffer. <td> {@link AMQType}
+ * <tr><td> Extract the type from a fully typed AMQP value.
+ * <tr><td> Extract the value from a fully typed AMQP value.
+ * </table>
+ */
+public class AMQTypedValue
+{
+    /** The type of the value. */
+    private final AMQType _type;
+
+    /** The Java native representation of the AMQP typed value. */
+    private final Object _value;
+
+    public AMQTypedValue(AMQType type, Object value)
+    {
+        if (type == null)
+        {
+            throw new NullPointerException("Cannot create a typed value with null type");
+        }
+
+        _type = type;
+        _value = type.toNativeValue(value);
+    }
+
+    private AMQTypedValue(AMQType type, ByteBuffer buffer)
+    {
+        _type = type;
+        _value = type.readValueFromBuffer(buffer);
+    }
+
+    public AMQType getType()
+    {
+        return _type;
+    }
+
+    public Object getValue()
+    {
+        return _value;
+    }
+
+    public void writeToBuffer(ByteBuffer buffer)
+    {
+        _type.writeToBuffer(_value, buffer);
+    }
+
+    public int getEncodingSize()
+    {
+        return _type.getEncodingSize(_value);
+    }
+
+    public static AMQTypedValue readFromBuffer(ByteBuffer buffer)
+    {
+        AMQType type = AMQTypeMap.getType(buffer.get());
+
+        return new AMQTypedValue(type, buffer);
+    }
+
+    public String toString()
+    {
+        return "[" + getType() + ": " + getValue() + "]";
+    }
+
+
+    public boolean equals(Object o)
+    {
+        if(o instanceof AMQTypedValue)
+        {
+            AMQTypedValue other = (AMQTypedValue) o;
+            return _type == other._type && (_value == null ? other._value == null : _value.equals(other._value));
+        }
+        else
+        {
+            return false;
+        }
+    }
+
+    public int hashCode()
+    {
+        return _type.hashCode() ^ (_value == null ? 0 : _value.hashCode());
+    }
+
+
+    public static AMQTypedValue toTypedValue(Object val)
+    {
+        if(val == null)
+        {
+            return AMQType.VOID.asTypedValue(null);
+        }
+
+        Class klass = val.getClass();
+        if(klass == String.class)
+        {
+            return AMQType.ASCII_STRING.asTypedValue(val);
+        }
+        else if(klass == Character.class)
+        {
+            return AMQType.ASCII_CHARACTER.asTypedValue(val);
+        }
+        else if(klass == Integer.class)
+        {
+            return AMQType.INT.asTypedValue(val);
+        }
+        else if(klass == Long.class)
+        {
+            return AMQType.LONG.asTypedValue(val);
+        }
+        else if(klass == Float.class)
+        {
+            return AMQType.FLOAT.asTypedValue(val);
+        }
+        else if(klass == Double.class)
+        {
+            return AMQType.DOUBLE.asTypedValue(val);
+        }
+        else if(klass == Date.class)
+        {
+            return AMQType.TIMESTAMP.asTypedValue(val);
+        }
+        else if(klass == Byte.class)
+        {
+            return AMQType.BYTE.asTypedValue(val);
+        }
+        else if(klass == Boolean.class)
+        {
+            return AMQType.BOOLEAN.asTypedValue(val);
+        }
+        else if(klass == byte[].class)
+        {
+            return AMQType.BINARY.asTypedValue(val);
+        }
+        else if(klass == BigDecimal.class)
+        {
+            return AMQType.DECIMAL.asTypedValue(val);
+        }
+        else if(val instanceof Map)
+        {
+            return AMQType.FIELD_TABLE.asTypedValue(FieldTable.convertToFieldTable((Map)val));
+        }
+        return null;
+    }
+}