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From paulmer...@apache.org
Subject [05/52] [abbrv] polygene-java git commit: New (de)serialization API and SPI & new implementations
Date Sun, 02 Apr 2017 17:47:47 GMT
http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSerializer.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSerializer.java b/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSerializer.java
new file mode 100644
index 0000000..bf26f0c
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSerializer.java
@@ -0,0 +1,271 @@
+/*
+ *  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.polygene.serialization.javaxxml;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.io.UncheckedIOException;
+import java.util.Base64;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import org.apache.polygene.api.PolygeneAPI;
+import org.apache.polygene.api.association.AssociationStateHolder;
+import org.apache.polygene.api.composite.CompositeInstance;
+import org.apache.polygene.api.entity.EntityReference;
+import org.apache.polygene.api.injection.scope.This;
+import org.apache.polygene.api.injection.scope.Uses;
+import org.apache.polygene.api.serialization.SerializationException;
+import org.apache.polygene.api.service.ServiceDescriptor;
+import org.apache.polygene.api.type.EnumType;
+import org.apache.polygene.api.type.MapType;
+import org.apache.polygene.api.type.ValueCompositeType;
+import org.apache.polygene.api.value.ValueComposite;
+import org.apache.polygene.api.value.ValueDescriptor;
+import org.apache.polygene.spi.serialization.AbstractTextSerializer;
+import org.apache.polygene.spi.serialization.XmlSerializer;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.apache.polygene.api.util.Collectors.toMap;
+
+/**
+ * XML Serializer.
+ */
+public class JavaxXmlSerializer extends AbstractTextSerializer implements XmlSerializer
+{
+    private static final String NULL_ELEMENT_NAME = "null";
+
+    @This
+    private JavaxXmlAdapters adapters;
+
+    @Uses
+    private ServiceDescriptor descriptor;
+
+    @Override
+    public <T> Function<T, Document> toXmlFunction( Options options )
+    {
+        return object -> doSerializeRoot( options, object );
+    }
+
+    private <T> Document doSerializeRoot( Options options, T object )
+    {
+        try
+        {
+            Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
+            doc.setXmlVersion( "1.1" );
+            doc.setXmlStandalone( true );
+            Element stateElement = doc.createElement( getSettings().getRootTagName() );
+            Node node = doSerialize( doc, options, object, true );
+            stateElement.appendChild( node );
+            doc.appendChild( stateElement );
+            return doc;
+        }
+        catch( ParserConfigurationException ex )
+        {
+            throw new SerializationException( "Unable to create XML document. "
+                                              + "Is your javax.xml subsystem correctly set up?", ex );
+        }
+    }
+
+    private <T> Node doSerialize( Document document, Options options, T object, boolean root )
+    {
+        if( object == null )
+        {
+            return document.createElement( NULL_ELEMENT_NAME );
+        }
+        Class<?> objectClass = object.getClass();
+        JavaxXmlAdapter<?> adapter = adapters.adapterFor( objectClass );
+        if( adapter != null )
+        {
+            return adapter.serialize( document, object, value -> doSerialize( document, options, value, false ) );
+        }
+        if( EnumType.isEnum( objectClass ) )
+        {
+            return document.createTextNode( object.toString() );
+        }
+        if( ValueCompositeType.isValueComposite( objectClass ) )
+        {
+            return serializeValueComposite( document, options, object, root );
+        }
+        if( MapType.isMap( objectClass ) )
+        {
+            return serializeMap( document, options, (Map<?, ?>) object );
+        }
+        if( Iterable.class.isAssignableFrom( objectClass ) )
+        {
+            return serializeIterable( document, options, (Iterable<?>) object );
+        }
+        if( Stream.class.isAssignableFrom( objectClass ) )
+        {
+            return serializeStream( document, options, (Stream<?>) object );
+        }
+        // Fallback to Java Serialization in Base 64
+        // Include all arrays!
+        return serializeBase64( document, object );
+    }
+
+    private <T> Node serializeValueComposite( Document document, Options options, T composite, boolean root )
+    {
+        CompositeInstance instance = PolygeneAPI.FUNCTION_COMPOSITE_INSTANCE_OF.apply( (ValueComposite) composite );
+        ValueDescriptor descriptor = (ValueDescriptor) instance.descriptor();
+        AssociationStateHolder state = (AssociationStateHolder) instance.state();
+        ValueCompositeType valueType = descriptor.valueType();
+
+        Element valueElement = document.createElement( getSettings().getValueTagName() );
+        valueType.properties().forEach(
+            property ->
+            {
+                Object value = state.propertyFor( property.accessor() ).get();
+                Element element = document.createElement( property.qualifiedName().name() );
+                element.appendChild( doSerialize( document, options, value, false ) );
+                valueElement.appendChild( element );
+            } );
+        valueType.associations().forEach(
+            association ->
+            {
+                EntityReference value = state.associationFor( association.accessor() ).reference();
+                Element element = document.createElement( association.qualifiedName().name() );
+                element.appendChild( doSerialize( document, options, value, false ) );
+                valueElement.appendChild( element );
+            }
+        );
+        valueType.manyAssociations().forEach(
+            association ->
+            {
+                Stream<EntityReference> value = state.manyAssociationFor( association.accessor() ).references();
+                Element element = document.createElement( association.qualifiedName().name() );
+                element.appendChild( doSerialize( document, options, value, false ) );
+                valueElement.appendChild( element );
+            }
+        );
+        valueType.namedAssociations().forEach(
+            association ->
+            {
+                Map<String, EntityReference> value = state.namedAssociationFor( association.accessor() ).references()
+                                                          .collect( toMap() );
+                Element element = document.createElement( association.qualifiedName().name() );
+                element.appendChild( doSerialize( document, options, value, false ) );
+                valueElement.appendChild( element );
+            }
+        );
+        if( !root && options.includeTypeInfo() )
+        {
+            valueElement.setAttribute( getSettings().getTypeInfoTagName(), valueType.primaryType().getName() );
+        }
+        return valueElement;
+    }
+
+    private Node serializeMap( Document document, Options options, Map<?, ?> map )
+    {
+        JavaxXmlSettings settings = getSettings();
+        Element mapElement = document.createElement( settings.getMapTagName() );
+        if( map.isEmpty() )
+        {
+            return mapElement;
+        }
+        Function<Map.Entry, Node> complexMapping = entry ->
+        {
+            Element entryElement = document.createElement( settings.getMapEntryTagName() );
+
+            Element keyElement = document.createElement( "key" );
+            keyElement.appendChild( doSerialize( document, options, entry.getKey(), false ) );
+            entryElement.appendChild( keyElement );
+
+            Element valueElement = document.createElement( "value" );
+            valueElement.appendChild( doSerialize( document, options, entry.getValue(), false ) );
+            entryElement.appendChild( valueElement );
+
+            return entryElement;
+        };
+
+        if( map.keySet().iterator().next() instanceof CharSequence )
+        {
+            map.entrySet().stream()
+               .map( entry ->
+                     {
+                         try
+                         {
+                             Element element = document.createElement( entry.getKey().toString() );
+                             element.appendChild( doSerialize( document, options, entry.getValue(), false ) );
+                             return element;
+                         }
+                         catch( DOMException ex )
+                         {
+                             // The key name cannot be encoded as a tag name, fallback to complex mapping
+                             // Tag names cannot start with a digit, some characters cannot be escaped etc...
+                             return complexMapping.apply( entry );
+                         }
+                     } )
+               .forEach( mapElement::appendChild );
+        }
+        else
+        {
+            map.entrySet().stream()
+               .map( complexMapping )
+               .forEach( mapElement::appendChild );
+        }
+        return mapElement;
+    }
+
+    private Node serializeIterable( Document document, Options options, Iterable<?> object )
+    {
+        return serializeStream( document, options, StreamSupport.stream( object.spliterator(), false ) );
+    }
+
+    private Node serializeStream( Document document, Options options, Stream<?> object )
+    {
+        JavaxXmlSettings settings = getSettings();
+        Element collectionElement = document.createElement( settings.getCollectionTagName() );
+        object.map( each -> doSerialize( document, options, each, false ) )
+              .forEach( itemValueNode ->
+                        {
+                            Element itemElement = document.createElement( settings.getCollectionElementTagName() );
+                            itemElement.appendChild( itemValueNode );
+                            collectionElement.appendChild( itemElement );
+                        } );
+        return collectionElement;
+    }
+
+    private <T> Node serializeBase64( Document document, T object )
+    {
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+        try( ObjectOutputStream out = new ObjectOutputStream( bout ) )
+        {
+            out.writeUnshared( object );
+            byte[] bytes = Base64.getEncoder().encode( bout.toByteArray() );
+            return document.createCDATASection( new String( bytes, UTF_8 ) );
+        }
+        catch( IOException ex )
+        {
+            throw new UncheckedIOException( ex );
+        }
+    }
+
+    private JavaxXmlSettings getSettings()
+    {
+        return JavaxXmlSettings.orDefault( descriptor.metaInfo( JavaxXmlSettings.class ) );
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSettings.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSettings.java b/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSettings.java
new file mode 100644
index 0000000..b5c5702
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/JavaxXmlSettings.java
@@ -0,0 +1,134 @@
+/*
+ *  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.polygene.serialization.javaxxml;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.apache.polygene.api.type.ValueType;
+
+/**
+ * javax.xml settings.
+ *
+ * Must be registered as meta-info at assembly time.
+ */
+// TODO javax.xml properties
+public class JavaxXmlSettings
+{
+    public static final JavaxXmlSettings DEFAULT = new JavaxXmlSettings();
+
+    public static JavaxXmlSettings orDefault( JavaxXmlSettings settings )
+    {
+        return settings != null ? settings : DEFAULT;
+    }
+
+    private String rootTagName;
+    private String collectionTagName;
+    private String collectionElementTagName;
+    private String mapTagName;
+    private String mapEntryTagName;
+    private String valueTagName;
+    private String typeInfoTagName;
+    private Map<ValueType, JavaxXmlAdapter<?>> adapters;
+
+    public JavaxXmlSettings()
+    {
+        rootTagName = "state";
+        collectionTagName = "collection";
+        collectionElementTagName = "element";
+        mapTagName = "map";
+        mapEntryTagName = "entry";
+        valueTagName = "value";
+        typeInfoTagName = "_type";
+        adapters = new LinkedHashMap<>();
+    }
+
+    public String getRootTagName()
+    {
+        return rootTagName;
+    }
+
+    public void setRootTagName( final String rootTagName )
+    {
+        this.rootTagName = rootTagName;
+    }
+
+    public String getCollectionTagName()
+    {
+        return collectionTagName;
+    }
+
+    public void setCollectionTagName( final String collectionTagName )
+    {
+        this.collectionTagName = collectionTagName;
+    }
+
+    public String getCollectionElementTagName()
+    {
+        return collectionElementTagName;
+    }
+
+    public void setCollectionElementTagName( final String collectionElementTagName )
+    {
+        this.collectionElementTagName = collectionElementTagName;
+    }
+
+    public String getMapTagName()
+    {
+        return mapTagName;
+    }
+
+    public void setMapTagName( final String mapTagName )
+    {
+        this.mapTagName = mapTagName;
+    }
+
+    public String getMapEntryTagName()
+    {
+        return mapEntryTagName;
+    }
+
+    public void setMapEntryTagName( final String mapEntryTagName )
+    {
+        this.mapEntryTagName = mapEntryTagName;
+    }
+
+    public String getValueTagName()
+    {
+        return valueTagName;
+    }
+
+    public void setValueTagName( final String valueTagName )
+    {
+        this.valueTagName = valueTagName;
+    }
+
+    public String getTypeInfoTagName()
+    {
+        return typeInfoTagName;
+    }
+
+    public void setTypeInfoTagName( final String typeInfoTagName )
+    {
+        this.typeInfoTagName = typeInfoTagName;
+    }
+
+    public Map<ValueType, JavaxXmlAdapter<?>> getAdapters()
+    {
+        return adapters;
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/package.html
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/package.html b/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/package.html
new file mode 100644
index 0000000..f81a030
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/main/java/org/apache/polygene/serialization/javaxxml/package.html
@@ -0,0 +1,24 @@
+<!--
+  ~  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.
+  ~
+  ~
+  -->
+<html>
+    <body>
+        <h2>javax.xml Serialization.</h2>
+    </body>
+</html>

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlAdaptersTest.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlAdaptersTest.java b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlAdaptersTest.java
new file mode 100644
index 0000000..16a2fb3
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlAdaptersTest.java
@@ -0,0 +1,39 @@
+package org.apache.polygene.serialization.javaxxml;
+
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import org.apache.polygene.api.injection.scope.Service;
+import org.apache.polygene.bootstrap.ModuleAssembly;
+import org.apache.polygene.test.AbstractPolygeneTest;
+import org.junit.Test;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+public class JavaxXmlAdaptersTest extends AbstractPolygeneTest
+{
+    @Override
+    public void assemble( ModuleAssembly module )
+    {
+        new JavaxXmlSerializationAssembler().assemble( module );
+        module.services( JavaxXmlSerializationService.class )
+              .withTypes( JavaxXmlAdapters.class );
+    }
+
+    @Service
+    private JavaxXmlAdapters adapters;
+
+    @Test
+    public void test() throws ParserConfigurationException
+    {
+        JavaxXmlAdapter<String> adapter = adapters.adapterFor( String.class );
+        Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
+        String original = "Cou<cou>€ôÙÔ#‰¥Ô";
+        Node node = adapter.serialize( doc, original, null );
+        assertThat( node.getNodeValue(), equalTo( original ) );
+        String result = adapter.deserialize( node, null );
+        assertThat( result, equalTo( original ) );
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlCollectionTest.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlCollectionTest.java b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlCollectionTest.java
new file mode 100644
index 0000000..5f0bf3c
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlCollectionTest.java
@@ -0,0 +1,31 @@
+/*
+ *  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.polygene.serialization.javaxxml;
+
+import org.apache.polygene.bootstrap.ModuleAssembly;
+import org.apache.polygene.test.serialization.AbstractCollectionSerializationTest;
+
+public class JavaxXmlCollectionTest extends AbstractCollectionSerializationTest
+{
+    @Override
+    public void assemble( ModuleAssembly module )
+    {
+        new JavaxXmlSerializationAssembler().assemble( module );
+        super.assemble( module );
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlDateFormatTest.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlDateFormatTest.java b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlDateFormatTest.java
new file mode 100644
index 0000000..6f69bbe
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlDateFormatTest.java
@@ -0,0 +1,33 @@
+/*
+ *  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.polygene.serialization.javaxxml;
+
+import org.apache.polygene.bootstrap.ModuleAssembly;
+import org.apache.polygene.test.serialization.AbstractDateFormatSerializationTest;
+import org.junit.Ignore;
+
+@Ignore( "Super test assume JSON" )
+public class JavaxXmlDateFormatTest extends AbstractDateFormatSerializationTest
+{
+    @Override
+    public void assemble( ModuleAssembly module )
+    {
+        new JavaxXmlSerializationAssembler().assemble( module );
+        super.assemble( module );
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlPlainValueTest.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlPlainValueTest.java b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlPlainValueTest.java
new file mode 100644
index 0000000..51d8e8a
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlPlainValueTest.java
@@ -0,0 +1,35 @@
+/*
+ *  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.polygene.serialization.javaxxml;
+
+import org.apache.polygene.bootstrap.ModuleAssembly;
+import org.apache.polygene.test.serialization.AbstractPlainValueSerializationTest;
+import org.junit.Ignore;
+
+@Ignore( "Super test assume JSON" )
+public class JavaxXmlPlainValueTest extends AbstractPlainValueSerializationTest
+{
+    @Override
+    public void assemble( ModuleAssembly module )
+    {
+        new JavaxXmlSerializationAssembler().assemble( module );
+        super.assemble( module );
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlValueCompositeTest.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlValueCompositeTest.java b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlValueCompositeTest.java
new file mode 100644
index 0000000..59d0e3e
--- /dev/null
+++ b/extensions/serialization-javaxxml/src/test/java/org/apache/polygene/serialization/javaxxml/JavaxXmlValueCompositeTest.java
@@ -0,0 +1,68 @@
+/*
+ *  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.polygene.serialization.javaxxml;
+
+import org.apache.polygene.api.injection.scope.Service;
+import org.apache.polygene.api.unitofwork.UnitOfWork;
+import org.apache.polygene.bootstrap.ModuleAssembly;
+import org.apache.polygene.spi.serialization.XmlSerialization;
+import org.apache.polygene.test.serialization.AbstractValueCompositeSerializationTest;
+import org.junit.Test;
+import org.xmlunit.diff.DefaultNodeMatcher;
+import org.xmlunit.diff.ElementSelectors;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+import static org.xmlunit.matchers.CompareMatcher.isSimilarTo;
+
+public class JavaxXmlValueCompositeTest extends AbstractValueCompositeSerializationTest
+{
+    @Override
+    public void assemble( ModuleAssembly module )
+    {
+        new JavaxXmlSerializationAssembler().assemble( module );
+        super.assemble( module );
+    }
+
+    @Service
+    XmlSerialization xmlSerialization;
+
+    @Test
+    public void valueCompositeXmlEquality()
+    {
+        try( UnitOfWork uow = unitOfWorkFactory.newUnitOfWork() )
+        {
+            Some some = buildSomeValue( moduleInstance, uow, "23" );
+
+            // Serialize using injected service
+            String stateString = serialization.serialize( some );
+            System.out.println( stateString );
+
+            // Deserialize using Module API
+            Some some2 = moduleInstance.newValueFromSerializedState( Some.class, stateString );
+
+            assertThat( "Value equality", some, equalTo( some2 ) );
+
+            // Need to loosely compare because of HashMaps not retaining order
+            assertThat( "XML equality",
+                        stateString,
+                        isSimilarTo( some2.toString() )
+                            .withNodeMatcher( new DefaultNodeMatcher( ElementSelectors.byNameAndAllAttributes ) ) );
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/build.gradle
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/build.gradle b/extensions/serialization-msgpack/build.gradle
new file mode 100644
index 0000000..6f51948
--- /dev/null
+++ b/extensions/serialization-msgpack/build.gradle
@@ -0,0 +1,36 @@
+/*
+ *  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.
+ */
+
+apply plugin: 'polygene-extension'
+
+description = "Apache Polygene™ MessagePack Serialization Extension"
+
+jar { manifest { name = "Apache Polygene™ Extension - Serialization - MessagePack" } }
+
+dependencies {
+  api polygene.core.bootstrap
+  api libraries.msgpack
+
+  implementation libraries.commons_lang
+
+  runtimeOnly polygene.core.runtime
+
+  testImplementation polygene.core.testsupport
+
+  testRuntimeOnly libraries.logback
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/dev-status.xml
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/dev-status.xml b/extensions/serialization-msgpack/dev-status.xml
new file mode 100644
index 0000000..8086fb0
--- /dev/null
+++ b/extensions/serialization-msgpack/dev-status.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!--
+  ~  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.
+  ~
+  ~
+  -->
+<module xmlns="http://polygene.apache.org/schemas/2008/dev-status/1"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://polygene.apache.org/schemas/2008/dev-status/1
+        http://polygene.apache.org/schemas/2008/dev-status/1/dev-status.xsd">
+    <status>
+        <!--none,early,beta,stable,mature-->
+        <codebase>early</codebase>
+
+        <!-- none, brief, good, complete -->
+        <documentation>none</documentation>
+
+        <!-- none, some, good, complete -->
+        <unittests>some</unittests>
+    </status>
+    <licenses>
+        <license>ALv2</license>
+    </licenses>
+</module>
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/docs/serialization-msgpack.txt
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/docs/serialization-msgpack.txt b/extensions/serialization-msgpack/src/docs/serialization-msgpack.txt
new file mode 100644
index 0000000..ad50c08
--- /dev/null
+++ b/extensions/serialization-msgpack/src/docs/serialization-msgpack.txt
@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////
+ * 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.
+///////////////////////////////////////////////////////////////
+
+[[extension-serialization-msgpack,MessagePack serialization]]
+= MessagePack serialization =
+
+[devstatus]
+--------------
+source=extensions/serialization-msgpack/dev-status.xml
+--------------
+
+// TODO Document usage of MessagePackSerialization
+// TODO Include sample model and its output from test code & resources
+// TODO Assembly - Serialization extension or sole Service, settings & adapters

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapter.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapter.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapter.java
new file mode 100644
index 0000000..6d99e69
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapter.java
@@ -0,0 +1,57 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import java.io.IOException;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import org.apache.polygene.api.type.ValueType;
+import org.msgpack.value.Value;
+
+/**
+ * Adapter for MessagePack (de)serialization.
+ *
+ * @param <T> the adapted type
+ */
+public interface MessagePackAdapter<T>
+{
+    /**
+     * @return the adapted type
+     */
+    Class<T> type();
+
+    /**
+     * Serialize.
+     *
+     * @param object Object to serialize, never null
+     * @param serializeFunction Serialization function for nested structure serialization
+     * @return MessagePack Value
+     */
+    Value serialize( Object object, Function<Object, Value> serializeFunction )
+        throws IOException;
+
+    /**
+     * Deserialize.
+     *
+     * @param value MessagePack value
+     * @param deserializeFunction Deserialization function for nested structure deserialization
+     * @return Deserialized object
+     */
+    T deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+        throws IOException;
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapters.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapters.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapters.java
new file mode 100644
index 0000000..892b389
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackAdapters.java
@@ -0,0 +1,64 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.apache.polygene.api.mixin.Mixins;
+import org.apache.polygene.api.type.ValueType;
+
+import static org.apache.polygene.api.type.HasTypesCollectors.closestType;
+
+@Mixins( MessagePackAdapters.Mixin.class )
+public interface MessagePackAdapters
+{
+    void registerAdapter( ValueType valueType, MessagePackAdapter<?> adapter );
+
+    <T> MessagePackAdapter<T> adapterFor( ValueType valueType );
+
+    default <T> MessagePackAdapter<T> adapterFor( Class<T> type )
+    {
+        return adapterFor( ValueType.of( type ) );
+    }
+
+    class Mixin implements MessagePackAdapters
+    {
+        private Map<ValueType, MessagePackAdapter<?>> adapters = new LinkedHashMap<>();
+
+        @Override
+        public void registerAdapter( ValueType valueType, MessagePackAdapter<?> adapter )
+        {
+            adapters.put( valueType, adapter );
+        }
+
+        @Override
+        public <T> MessagePackAdapter<T> adapterFor( final ValueType valueType )
+        {
+            return castAdapter( adapters.keySet().stream()
+                                        .collect( closestType( valueType ) )
+                                        .map( adapters::get )
+                                        .orElse( null ) );
+        }
+
+        @SuppressWarnings( "unchecked" )
+        private <T> MessagePackAdapter<T> castAdapter( MessagePackAdapter<?> adapter )
+        {
+            return (MessagePackAdapter<T>) adapter;
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackDeserializer.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackDeserializer.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackDeserializer.java
new file mode 100644
index 0000000..84508a4
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackDeserializer.java
@@ -0,0 +1,295 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Stream;
+import org.apache.polygene.api.association.AssociationDescriptor;
+import org.apache.polygene.api.entity.EntityReference;
+import org.apache.polygene.api.injection.scope.This;
+import org.apache.polygene.api.mixin.Mixins;
+import org.apache.polygene.api.property.PropertyDescriptor;
+import org.apache.polygene.api.serialization.Deserializer;
+import org.apache.polygene.api.serialization.SerializationException;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.api.type.CollectionType;
+import org.apache.polygene.api.type.EnumType;
+import org.apache.polygene.api.type.MapType;
+import org.apache.polygene.api.type.ValueCompositeType;
+import org.apache.polygene.api.type.ValueType;
+import org.apache.polygene.api.value.ValueBuilder;
+import org.apache.polygene.api.value.ValueDescriptor;
+import org.apache.polygene.spi.serialization.AbstractBinaryDeserializer;
+import org.msgpack.core.MessagePack;
+import org.msgpack.core.MessageUnpacker;
+import org.msgpack.value.ArrayValue;
+import org.msgpack.value.BinaryValue;
+import org.msgpack.value.ImmutableValue;
+import org.msgpack.value.MapValue;
+import org.msgpack.value.Value;
+
+import static java.util.Collections.unmodifiableList;
+import static java.util.Collections.unmodifiableMap;
+import static java.util.Collections.unmodifiableSet;
+import static org.apache.polygene.api.util.Collectors.toMap;
+
+// TODO Test all deserializations for: missing & spurious entries
+@Mixins( MessagePackDeserializer.Mixin.class )
+public interface MessagePackDeserializer extends Deserializer
+{
+    class Mixin extends AbstractBinaryDeserializer
+    {
+        @This
+        private MessagePackAdapters adapters;
+
+        @Override
+        public <T> T deserialize( ModuleDescriptor module, ValueType valueType, InputStream state )
+        {
+            MessageUnpacker unpacker = MessagePack.newDefaultUnpacker( state );
+            try
+            {
+                if( !unpacker.hasNext() )
+                {
+                    return null;
+                }
+                ImmutableValue value = unpacker.unpackValue();
+                return doDeserialize( module, valueType, value );
+            }
+            catch( IOException e )
+            {
+                throw new SerializationException( "Unable to deserialize " + valueType );
+            }
+        }
+
+        @SuppressWarnings( "unchecked" )
+        private <T> T doDeserialize( ModuleDescriptor module, ValueType valueType, Value value )
+        {
+            try
+            {
+                if( value.isNilValue() )
+                {
+                    return null;
+                }
+                MessagePackAdapter<?> adapter = adapters.adapterFor( valueType );
+                if( adapter != null )
+                {
+                    return (T) adapter.deserialize( value, ( val, type ) -> doDeserialize( module, valueType, val ) );
+                }
+                if( EnumType.class.isAssignableFrom( valueType.getClass() ) )
+                {
+                    return (T) Enum.valueOf( (Class) valueType.primaryType(), value.asStringValue().asString() );
+                }
+                if( CollectionType.class.isAssignableFrom( valueType.getClass() ) )
+                {
+                    return (T) deserializeCollection( module, (CollectionType) valueType, value.asArrayValue() );
+                }
+                if( MapType.class.isAssignableFrom( valueType.getClass() ) )
+                {
+                    return (T) deserializeMap( module, (MapType) valueType, value.asMapValue() );
+                }
+                if( ValueCompositeType.class.isAssignableFrom( valueType.getClass() ) )
+                {
+                    return (T) deserializeValueComposite( module, (ValueCompositeType) valueType, value.asMapValue() );
+                }
+                return (T) doGuessDeserialize( module, valueType, value );
+            }
+            catch( IOException | ClassNotFoundException ex )
+            {
+                throw new SerializationException( "Unable to deserialize " + valueType + " from: " + value );
+            }
+        }
+
+        private Collection<?> deserializeCollection( ModuleDescriptor module, CollectionType collectionType,
+                                                     ArrayValue value ) throws IOException
+        {
+            Collection<?> collection = collectionType.isSet() ? new LinkedHashSet( value.size() )
+                                                              : new ArrayList( value.size() );
+            for( Value element : value.list() )
+            {
+                collection.add( doDeserialize( module, collectionType.collectedType(), element ) );
+            }
+            return collection;
+        }
+
+        private Map<Object, Object> deserializeMap( ModuleDescriptor module, MapType mapType, MapValue value )
+            throws IOException
+        {
+            Map<Object, Object> map = new LinkedHashMap<>( value.size() );
+            for( Map.Entry<Value, Value> entry : value.entrySet() )
+            {
+                Object key = doDeserialize( module, mapType.keyType(), entry.getKey() );
+                Object val = doDeserialize( module, mapType.valueType(), entry.getValue() );
+                map.put( key, val );
+            }
+            return map;
+        }
+
+        private Object deserializeValueComposite( ModuleDescriptor module, ValueCompositeType valueType,
+                                                  MapValue value ) throws IOException
+        {
+            Map<String, Value> namedValues = value.map().entrySet().stream().map(
+                entry ->
+                {
+                    String key = doDeserialize( module, ValueType.STRING, entry.getKey() );
+                    return new AbstractMap.SimpleImmutableEntry<>( key, entry.getValue() );
+                }
+            ).collect( toMap( HashMap::new ) );
+
+            String typeInfo = null;
+            if( namedValues.containsKey( "_type" ) )
+            {
+                typeInfo = doDeserialize( module, ValueType.STRING, namedValues.get( "_type" ) );
+            }
+            if( typeInfo != null )
+            {
+                ValueDescriptor descriptor = module.valueDescriptor( typeInfo );
+                if( descriptor == null )
+                {
+                    throw new SerializationException(
+                        "_type: " + typeInfo + " could not be resolved while deserializing " + value );
+                }
+                valueType = descriptor.valueType();
+            }
+
+            ValueBuilder builder = module.instance().newValueBuilderWithState(
+                valueType.primaryType(),
+                propertyFunction( module, namedValues ),
+                associationFunction( module, namedValues ),
+                manyAssociationFunction( module, namedValues ),
+                namedAssociationFunction( module, namedValues ) );
+            return builder.newInstance();
+        }
+
+        private Function<PropertyDescriptor, Object> propertyFunction( ModuleDescriptor module,
+                                                                       Map<String, Value> namedValues )
+        {
+            return property ->
+            {
+                Value value = namedValues.get( property.qualifiedName().name() );
+                if( value != null )
+                {
+                    Object propertyValue = doDeserialize( module, property.valueType(), value );
+                    if( property.isImmutable() )
+                    {
+                        if( propertyValue instanceof Set )
+                        {
+                            return unmodifiableSet( (Set<?>) propertyValue );
+                        }
+                        else if( propertyValue instanceof List )
+                        {
+                            return unmodifiableList( (List<?>) propertyValue );
+                        }
+                        else if( propertyValue instanceof Map )
+                        {
+                            return unmodifiableMap( (Map<?, ?>) propertyValue );
+                        }
+                    }
+                    return propertyValue;
+                }
+                return property.resolveInitialValue( module );
+            };
+        }
+
+        private Function<AssociationDescriptor, EntityReference> associationFunction( ModuleDescriptor module,
+                                                                                      Map<String, Value> namedValues )
+        {
+            return association -> doDeserialize( module, ValueType.ENTITY_REFERENCE,
+                                                 namedValues.get( association.qualifiedName().name() ) );
+        }
+
+        private Function<AssociationDescriptor, Stream<EntityReference>> manyAssociationFunction(
+            ModuleDescriptor module, Map<String, Value> namedValues )
+        {
+            return association ->
+            {
+                List list = doDeserialize( module, ENTITY_REF_LIST_VALUE_TYPE,
+                                           namedValues.get( association.qualifiedName().name() ) );
+                return list == null ? Stream.empty() : list.stream();
+            };
+        }
+
+        private Function<AssociationDescriptor, Stream<Map.Entry<String, EntityReference>>> namedAssociationFunction(
+            ModuleDescriptor module, Map<String, Value> namedValues )
+        {
+            return association ->
+            {
+                Map map = doDeserialize( module, ENTITY_REF_MAP_VALUE_TYPE,
+                                         namedValues.get( association.qualifiedName().name() ) );
+                return map == null ? Stream.empty() : map.entrySet().stream();
+            };
+        }
+
+        private Object doGuessDeserialize( ModuleDescriptor module, ValueType valueType, Value value )
+            throws IOException, ClassNotFoundException
+        {
+            switch( value.getValueType() )
+            {
+                case BINARY:
+                    return deserializeJava( value.asBinaryValue() );
+                case MAP:
+                    MapValue mapValue = value.asMapValue();
+                    Optional<String> typeInfo = mapValue
+                        .entrySet().stream()
+                        .filter( entry -> entry.getKey().isStringValue() )
+                        .map( entry ->
+                              {
+                                  String key = doDeserialize( module, ValueType.STRING, entry.getKey() );
+                                  return new AbstractMap.SimpleImmutableEntry<>( key, entry.getValue() );
+                              } )
+                        .filter( entry -> "_type".equals( entry.getKey() ) )
+                        .findFirst()
+                        .map( entry -> doDeserialize( module, ValueType.STRING, entry.getValue() ) );
+                    if( typeInfo.isPresent() )
+                    {
+                        ValueDescriptor valueDescriptor = module.valueDescriptor( typeInfo.get() );
+                        if( valueDescriptor != null )
+                        {
+                            return deserializeValueComposite( module, valueDescriptor.valueType(), mapValue );
+                        }
+                    }
+                default:
+                    throw new SerializationException( "Don't know how to deserialize " + valueType + " from " + value
+                                                      + " (" + value.getValueType() + ")" );
+            }
+        }
+
+        private Object deserializeJava( BinaryValue value )
+            throws IOException, ClassNotFoundException
+        {
+            byte[] bytes = value.asByteArray();
+            try( ObjectInputStream oin = new ObjectInputStream( new ByteArrayInputStream( bytes ) ) )
+            {
+                return oin.readObject();
+            }
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerialization.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerialization.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerialization.java
new file mode 100644
index 0000000..d24d597
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerialization.java
@@ -0,0 +1,22 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+public interface MessagePackSerialization extends MessagePackSerializer, MessagePackDeserializer
+{
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationAssembler.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationAssembler.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationAssembler.java
new file mode 100644
index 0000000..63536cc
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationAssembler.java
@@ -0,0 +1,52 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import org.apache.polygene.api.serialization.Deserializer;
+import org.apache.polygene.api.serialization.Serialization;
+import org.apache.polygene.api.serialization.Serializer;
+import org.apache.polygene.bootstrap.Assemblers;
+import org.apache.polygene.bootstrap.ModuleAssembly;
+import org.apache.polygene.bootstrap.ServiceDeclaration;
+
+public class MessagePackSerializationAssembler extends Assemblers.VisibilityIdentity<MessagePackSerializationAssembler>
+{
+    private MessagePackSettings settings;
+
+    public MessagePackSerializationAssembler withMessagePackSettings( MessagePackSettings settings )
+    {
+        this.settings = settings;
+        return this;
+    }
+
+    @Override
+    public void assemble( ModuleAssembly module )
+    {
+        ServiceDeclaration declaration = module.services( MessagePackSerializationService.class )
+                                               .withTypes( Serialization.class, Serializer.class, Deserializer.class )
+                                               .visibleIn( visibility() );
+        if( hasIdentity() )
+        {
+            declaration.identifiedBy( identity() );
+        }
+        if( settings != null )
+        {
+            declaration.setMetaInfo( settings );
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationService.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationService.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationService.java
new file mode 100644
index 0000000..4cd23b7
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializationService.java
@@ -0,0 +1,414 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.time.Duration;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.OffsetDateTime;
+import java.time.Period;
+import java.time.ZonedDateTime;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import org.apache.polygene.api.entity.EntityReference;
+import org.apache.polygene.api.identity.Identity;
+import org.apache.polygene.api.identity.StringIdentity;
+import org.apache.polygene.api.injection.scope.This;
+import org.apache.polygene.api.injection.scope.Uses;
+import org.apache.polygene.api.mixin.Mixins;
+import org.apache.polygene.api.service.ServiceActivation;
+import org.apache.polygene.api.service.ServiceDescriptor;
+import org.apache.polygene.api.type.ValueType;
+import org.msgpack.value.Value;
+import org.msgpack.value.ValueFactory;
+
+@Mixins( MessagePackSerializationService.Activation.class )
+public interface MessagePackSerializationService extends MessagePackSerialization, ServiceActivation
+{
+    class Activation implements ServiceActivation
+    {
+        @Uses
+        private ServiceDescriptor descriptor;
+
+        @This
+        private MessagePackAdapters adapters;
+
+        private boolean registrationDone = false;
+
+        @Override
+        public void activateService()
+        {
+            if( !registrationDone )
+            {
+                registerCustomAdapters();
+                registerBaseAdapters();
+                registrationDone = true;
+            }
+        }
+
+        @Override
+        public void passivateService() {}
+
+        private void registerCustomAdapters()
+        {
+            MessagePackSettings.orDefault( descriptor.metaInfo( MessagePackSettings.class ) )
+                               .getAdapters()
+                               .forEach( ( valueType, adapter ) -> adapters.registerAdapter( valueType, adapter ) );
+        }
+
+        private void registerBaseAdapters()
+        {
+            // Primitive Value types
+            adapters.registerAdapter( ValueType.STRING, new StringAdapter() );
+            adapters.registerAdapter( ValueType.CHARACTER, new CharacterAdapter() );
+            adapters.registerAdapter( ValueType.BOOLEAN, new BooleanAdapter() );
+            adapters.registerAdapter( ValueType.INTEGER, new IntegerAdapter() );
+            adapters.registerAdapter( ValueType.LONG, new LongAdapter() );
+            adapters.registerAdapter( ValueType.SHORT, new ShortAdapter() );
+            adapters.registerAdapter( ValueType.BYTE, new ByteAdapter() );
+            adapters.registerAdapter( ValueType.FLOAT, new FloatAdapter() );
+            adapters.registerAdapter( ValueType.DOUBLE, new DoubleAdapter() );
+
+            // Number types
+            adapters.registerAdapter( ValueType.BIG_DECIMAL, new BigDecimalAdapter() );
+            adapters.registerAdapter( ValueType.BIG_INTEGER, new BigIntegerAdapter() );
+
+            // Date types
+            adapters.registerAdapter( ValueType.INSTANT, new InstantAdapter() );
+            adapters.registerAdapter( ValueType.ZONED_DATE_TIME, new ZonedDateTimeAdapter() );
+            adapters.registerAdapter( ValueType.OFFSET_DATE_TIME, new OffsetDateTimeAdapter() );
+            adapters.registerAdapter( ValueType.LOCAL_DATE_TIME, new LocalDateTimeAdapter() );
+            adapters.registerAdapter( ValueType.LOCAL_DATE, new LocalDateAdapter() );
+            adapters.registerAdapter( ValueType.LOCAL_TIME, new LocalTimeAdapter() );
+            adapters.registerAdapter( ValueType.DURATION, new DurationAdapter() );
+            adapters.registerAdapter( ValueType.PERIOD, new PeriodAdapter() );
+
+            // Other supported types
+            adapters.registerAdapter( ValueType.IDENTITY, new IdentityAdapter() );
+            adapters.registerAdapter( ValueType.ENTITY_REFERENCE, new EntityReferenceAdapter() );
+        }
+
+        private static abstract class ToStringAdapter<T> implements MessagePackAdapter<T>
+        {
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newString( object.toString() );
+            }
+        }
+
+        private static class StringAdapter extends ToStringAdapter<String>
+        {
+            @Override
+            public Class<String> type() { return String.class; }
+
+            @Override
+            public String deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asStringValue().asString();
+            }
+        }
+
+        private static class CharacterAdapter extends ToStringAdapter<Character>
+        {
+            @Override
+            public Class<Character> type() { return Character.class; }
+
+            @Override
+            public Character deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                String string = value.asStringValue().asString();
+                return string.isEmpty() ? null : string.charAt( 0 );
+            }
+        }
+
+        private static class BooleanAdapter implements MessagePackAdapter<Boolean>
+        {
+            @Override
+            public Class<Boolean> type() { return Boolean.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newBoolean( (Boolean) object );
+            }
+
+            @Override
+            public Boolean deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asBooleanValue().getBoolean();
+            }
+        }
+
+        private static class IntegerAdapter implements MessagePackAdapter<Integer>
+        {
+            @Override
+            public Class<Integer> type() { return Integer.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newInteger( (Integer) object );
+            }
+
+            @Override
+            public Integer deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asIntegerValue().asInt();
+            }
+        }
+
+        private static class LongAdapter implements MessagePackAdapter<Long>
+        {
+            @Override
+            public Class<Long> type() { return Long.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newInteger( (Long) object );
+            }
+
+            @Override
+            public Long deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asIntegerValue().asLong();
+            }
+        }
+
+        private static class ShortAdapter implements MessagePackAdapter<Short>
+        {
+            @Override
+            public Class<Short> type() { return Short.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newInteger( (Short) object );
+            }
+
+            @Override
+            public Short deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asIntegerValue().asShort();
+            }
+        }
+
+        private static class ByteAdapter implements MessagePackAdapter<Byte>
+        {
+            @Override
+            public Class<Byte> type() { return Byte.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newInteger( (Byte) object );
+            }
+
+            @Override
+            public Byte deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asIntegerValue().asByte();
+            }
+        }
+
+        private static class FloatAdapter implements MessagePackAdapter<Float>
+        {
+            @Override
+            public Class<Float> type() { return Float.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newFloat( (Float) object );
+            }
+
+            @Override
+            public Float deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asFloatValue().toFloat();
+            }
+        }
+
+        private static class DoubleAdapter implements MessagePackAdapter<Double>
+        {
+            @Override
+            public Class<Double> type() { return Double.class; }
+
+            @Override
+            public Value serialize( Object object, Function<Object, Value> serializeFunction )
+            {
+                return ValueFactory.newFloat( (Double) object );
+            }
+
+            @Override
+            public Double deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return value.asFloatValue().toDouble();
+            }
+        }
+
+        private static class BigDecimalAdapter extends ToStringAdapter<BigDecimal>
+        {
+            @Override
+            public Class<BigDecimal> type() { return BigDecimal.class; }
+
+            @Override
+            public BigDecimal deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return new BigDecimal( value.asStringValue().asString() );
+            }
+        }
+
+        private static class BigIntegerAdapter extends ToStringAdapter<BigInteger>
+        {
+            @Override
+            public Class<BigInteger> type() { return BigInteger.class; }
+
+            @Override
+            public BigInteger deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return new BigInteger( value.asStringValue().asString() );
+            }
+        }
+
+        private static class InstantAdapter extends ToStringAdapter<Instant>
+        {
+            @Override
+            public Class<Instant> type() { return Instant.class; }
+
+            @Override
+            public Instant deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return Instant.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class ZonedDateTimeAdapter extends ToStringAdapter<ZonedDateTime>
+        {
+            @Override
+            public Class<ZonedDateTime> type() { return ZonedDateTime.class; }
+
+            @Override
+            public ZonedDateTime deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return ZonedDateTime.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class OffsetDateTimeAdapter extends ToStringAdapter<OffsetDateTime>
+        {
+            @Override
+            public Class<OffsetDateTime> type() { return OffsetDateTime.class; }
+
+            @Override
+            public OffsetDateTime deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return OffsetDateTime.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class LocalDateTimeAdapter extends ToStringAdapter<LocalDateTime>
+        {
+            @Override
+            public Class<LocalDateTime> type() { return LocalDateTime.class; }
+
+            @Override
+            public LocalDateTime deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return LocalDateTime.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class LocalDateAdapter extends ToStringAdapter<LocalDate>
+        {
+            @Override
+            public Class<LocalDate> type() { return LocalDate.class; }
+
+            @Override
+            public LocalDate deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return LocalDate.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class LocalTimeAdapter extends ToStringAdapter<LocalTime>
+        {
+            @Override
+            public Class<LocalTime> type() { return LocalTime.class; }
+
+            @Override
+            public LocalTime deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return LocalTime.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class DurationAdapter extends ToStringAdapter<Duration>
+        {
+            @Override
+            public Class<Duration> type() { return Duration.class; }
+
+            @Override
+            public Duration deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return Duration.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class PeriodAdapter extends ToStringAdapter<Period>
+        {
+            @Override
+            public Class<Period> type() { return Period.class; }
+
+            @Override
+            public Period deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return Period.parse( value.asStringValue().asString() );
+            }
+        }
+
+        private static class IdentityAdapter extends ToStringAdapter<Identity>
+        {
+            @Override
+            public Class<Identity> type() { return Identity.class; }
+
+            @Override
+            public Identity deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return StringIdentity.fromString( value.asStringValue().asString() );
+            }
+        }
+
+        private static class EntityReferenceAdapter extends ToStringAdapter<EntityReference>
+        {
+            @Override
+            public Class<EntityReference> type() { return EntityReference.class; }
+
+            @Override
+            public EntityReference deserialize( Value value, BiFunction<Value, ValueType, Object> deserializeFunction )
+            {
+                return EntityReference.parseEntityReference( value.asStringValue().asString() );
+            }
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializer.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializer.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializer.java
new file mode 100644
index 0000000..7321e6d
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSerializer.java
@@ -0,0 +1,187 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.io.OutputStream;
+import java.util.Map;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+import org.apache.polygene.api.PolygeneAPI;
+import org.apache.polygene.api.association.AssociationStateHolder;
+import org.apache.polygene.api.common.Optional;
+import org.apache.polygene.api.composite.CompositeInstance;
+import org.apache.polygene.api.injection.scope.This;
+import org.apache.polygene.api.mixin.Mixins;
+import org.apache.polygene.api.serialization.SerializationException;
+import org.apache.polygene.api.serialization.Serializer;
+import org.apache.polygene.api.type.EnumType;
+import org.apache.polygene.api.type.MapType;
+import org.apache.polygene.api.type.ValueCompositeType;
+import org.apache.polygene.api.value.ValueComposite;
+import org.apache.polygene.api.value.ValueDescriptor;
+import org.apache.polygene.spi.serialization.AbstractBinarySerializer;
+import org.msgpack.core.MessagePack;
+import org.msgpack.core.MessagePacker;
+import org.msgpack.value.ArrayValue;
+import org.msgpack.value.BinaryValue;
+import org.msgpack.value.MapValue;
+import org.msgpack.value.Value;
+import org.msgpack.value.ValueFactory;
+
+import static java.util.stream.Collectors.toList;
+import static org.apache.polygene.api.util.Collectors.toMap;
+
+@Mixins( MessagePackSerializer.Mixin.class )
+public interface MessagePackSerializer extends Serializer
+{
+    class Mixin extends AbstractBinarySerializer
+    {
+        @This
+        private MessagePackAdapters adapters;
+
+        @Override
+        public void serialize( Options options, OutputStream output, @Optional Object object )
+        {
+            MessagePacker packer = MessagePack.newDefaultPacker( output );
+            Value value = doSerialize( options, object, true );
+            try
+            {
+                packer.packValue( value );
+                packer.flush();
+            }
+            catch( IOException ex )
+            {
+                throw new SerializationException( "Unable to serialize " + object, ex );
+            }
+        }
+
+        private Value doSerialize( Options options, Object object, boolean root )
+        {
+            try
+            {
+                if( object == null )
+                {
+                    return ValueFactory.newNil();
+                }
+                Class<?> objectClass = object.getClass();
+                MessagePackAdapter<?> adapter = adapters.adapterFor( objectClass );
+                if( adapter != null )
+                {
+                    return adapter.serialize( object, obj -> doSerialize( options, obj, false ) );
+                }
+                if( EnumType.isEnum( objectClass ) )
+                {
+                    return ValueFactory.newString( object.toString() );
+                }
+                if( ValueCompositeType.isValueComposite( objectClass ) )
+                {
+                    return serializeValueComposite( options, object, root );
+                }
+                if( MapType.isMap( objectClass ) )
+                {
+                    return serializeMap( options, (Map<?, ?>) object );
+                }
+                if( Iterable.class.isAssignableFrom( objectClass ) )
+                {
+                    return serializeIterable( options, (Iterable<?>) object );
+                }
+                if( Stream.class.isAssignableFrom( objectClass ) )
+                {
+                    return serializeStream( options, (Stream<?>) object );
+                }
+                // Fallback to Java Serialization
+                // Include all arrays!
+                return serializeJava( object );
+            }
+            catch( IOException ex )
+            {
+                throw new SerializationException( "Unable to serialize " + object, ex );
+            }
+        }
+
+        private MapValue serializeValueComposite( Options options, Object composite, boolean root )
+        {
+            CompositeInstance instance = PolygeneAPI.FUNCTION_COMPOSITE_INSTANCE_OF.apply( (ValueComposite) composite );
+            ValueDescriptor descriptor = (ValueDescriptor) instance.descriptor();
+            AssociationStateHolder state = (AssociationStateHolder) instance.state();
+            ValueCompositeType valueType = descriptor.valueType();
+
+            ValueFactory.MapBuilder builder = ValueFactory.newMapBuilder();
+            valueType.properties().forEach(
+                property -> builder.put(
+                    ValueFactory.newString( property.qualifiedName().name() ),
+                    doSerialize( options, state.propertyFor( property.accessor() ).get(), false ) ) );
+            valueType.associations().forEach(
+                association -> builder.put(
+                    ValueFactory.newString( association.qualifiedName().name() ),
+                    doSerialize( options, state.associationFor( association.accessor() ).reference(), false ) ) );
+            valueType.manyAssociations().forEach(
+                association -> builder.put(
+                    ValueFactory.newString( association.qualifiedName().name() ),
+                    doSerialize( options,
+                                 state.manyAssociationFor( association.accessor() ).references().collect( toList() ),
+                                 false ) ) );
+            valueType.namedAssociations().forEach(
+                association -> builder.put(
+                    ValueFactory.newString( association.qualifiedName().name() ),
+                    doSerialize( options,
+                                 state.namedAssociationFor( association.accessor() ).references().collect( toMap() ),
+                                 false ) ) );
+
+            if( !root && options.includeTypeInfo() )
+            {
+                builder.put( ValueFactory.newString( "_type" ),
+                             ValueFactory.newString( valueType.primaryType().getName() ) );
+            }
+            return builder.build();
+        }
+
+        private MapValue serializeMap( Options options, Map<?, ?> map )
+        {
+            ValueFactory.MapBuilder builder = ValueFactory.newMapBuilder();
+            map.forEach( ( key, value ) -> builder.put( doSerialize( options, key, false ),
+                                                        doSerialize( options, value, false ) ) );
+            return builder.build();
+        }
+
+        private ArrayValue serializeIterable( Options options, Iterable<?> iterable )
+        {
+            return serializeStream( options, StreamSupport.stream( iterable.spliterator(), false ) );
+        }
+
+        private ArrayValue serializeStream( Options options, Stream<?> stream )
+        {
+            return ValueFactory.newArray( stream.map( element -> doSerialize( options, element, false ) )
+                                                .collect( toList() ) );
+        }
+
+        private BinaryValue serializeJava( Object object ) throws IOException
+        {
+            ByteArrayOutputStream bout = new ByteArrayOutputStream();
+            try( ObjectOutputStream out = new ObjectOutputStream( bout ) )
+            {
+                out.writeUnshared( object );
+                byte[] bytes = bout.toByteArray();
+                return ValueFactory.newBinary( bytes );
+            }
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/polygene-java/blob/17b11697/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSettings.java
----------------------------------------------------------------------
diff --git a/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSettings.java b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSettings.java
new file mode 100644
index 0000000..8080d94
--- /dev/null
+++ b/extensions/serialization-msgpack/src/main/java/org/apache/polygene/serialization/msgpack/MessagePackSettings.java
@@ -0,0 +1,44 @@
+/*
+ *  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.polygene.serialization.msgpack;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.apache.polygene.api.type.ValueType;
+
+public class MessagePackSettings
+{
+    public static final MessagePackSettings DEFAULT = new MessagePackSettings();
+
+    public static MessagePackSettings orDefault( MessagePackSettings settings )
+    {
+        return settings != null ? settings : DEFAULT;
+    }
+
+    private Map<ValueType, MessagePackAdapter<?>> adapters;
+
+    public MessagePackSettings()
+    {
+        adapters = new LinkedHashMap<>();
+    }
+
+    public Map<ValueType, MessagePackAdapter<?>> getAdapters()
+    {
+        return adapters;
+    }
+}


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