Eclipse warnings cleanup; adding a unit test trying to reproduce #29,…

… failing so far

src/main/java/com/fasterxml/jackson/datatype/guava/deser/GuavaCollectionDeserializer.java

@@ -14,6 +14,8 @@ public abstract class GuavaCollectionDeserializer<T>
     extends StdDeserializer<T>
     implements ContextualDeserializer
 {
+    private static final long serialVersionUID = 1L;
+
     protected final CollectionType _containerType;
 
     /**
@@ -56,6 +58,7 @@ public abstract GuavaCollectionDeserializer<T> withResolved(
      * after deserializer itself has been registered. This
      * is needed to handle recursive and transitive dependencies.
      */
+    @Override
     public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
             BeanProperty property) throws JsonMappingException
     {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/GuavaImmutableCollectionDeserializer.java

@@ -12,7 +12,9 @@
 import com.google.common.collect.ImmutableCollection;
 
 abstract class GuavaImmutableCollectionDeserializer<T extends ImmutableCollection<Object>>
-        extends GuavaCollectionDeserializer<T> {
+        extends GuavaCollectionDeserializer<T>
+{
+    private static final long serialVersionUID = 1L;
 
     GuavaImmutableCollectionDeserializer(CollectionType type,
             TypeDeserializer typeDeser, JsonDeserializer<?> deser) {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/GuavaMapDeserializer.java

@@ -65,6 +65,7 @@ public abstract GuavaMapDeserializer<T> withResolved(KeyDeserializer keyDeser,
      * after deserializer itself has been registered. This
      * is needed to handle recursive and transitive dependencies.
      */
+    @Override
     public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
             BeanProperty property) throws JsonMappingException
     {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/GuavaMultisetDeserializer.java

@@ -11,7 +11,9 @@
 import com.fasterxml.jackson.databind.type.CollectionType;
 import com.google.common.collect.Multiset;
 
-abstract class GuavaMultisetDeserializer<T extends Multiset<Object>> extends GuavaCollectionDeserializer<T> {
+abstract class GuavaMultisetDeserializer<T extends Multiset<Object>> extends GuavaCollectionDeserializer<T>
+{
+    private static final long serialVersionUID = 1L;
 
     GuavaMultisetDeserializer(CollectionType type, TypeDeserializer typeDeser, JsonDeserializer<?> deser) {
         super(type, typeDeser, deser);

src/main/java/com/fasterxml/jackson/datatype/guava/deser/GuavaOptionalDeserializer.java

@@ -10,7 +10,10 @@
 import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
 import com.google.common.base.Optional;
 
-public final class GuavaOptionalDeserializer extends StdDeserializer<Optional<?>> {
+public final class GuavaOptionalDeserializer extends StdDeserializer<Optional<?>>
+{
+    private static final long serialVersionUID = 1L;
+
     private final JavaType _referenceType;
 
     public GuavaOptionalDeserializer(JavaType valueType) {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/HashMultisetDeserializer.java

@@ -7,8 +7,10 @@
 import com.google.common.collect.HashMultiset;
 
 public class HashMultisetDeserializer
- extends GuavaMultisetDeserializer<HashMultiset<Object>>
+    extends GuavaMultisetDeserializer<HashMultiset<Object>>
 {
+    private static final long serialVersionUID = 1L;
+
     public HashMultisetDeserializer(CollectionType type,
             TypeDeserializer typeDeser, JsonDeserializer<?> deser)
     {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/ImmutableListDeserializer.java

@@ -7,7 +7,10 @@
 import com.fasterxml.jackson.databind.type.CollectionType;
 
 public class ImmutableListDeserializer extends
-        GuavaImmutableCollectionDeserializer<ImmutableList<Object>> {
+        GuavaImmutableCollectionDeserializer<ImmutableList<Object>>
+{
+    private static final long serialVersionUID = 1L;
+
     public ImmutableListDeserializer(CollectionType type,
             TypeDeserializer typeDeser, JsonDeserializer<?> deser) {
         super(type, typeDeser, deser);

src/main/java/com/fasterxml/jackson/datatype/guava/deser/ImmutableMultisetDeserializer.java

@@ -6,7 +6,9 @@
 import com.google.common.collect.ImmutableCollection.Builder;
 import com.google.common.collect.ImmutableMultiset;
 
-public class ImmutableMultisetDeserializer extends GuavaImmutableCollectionDeserializer<ImmutableMultiset<Object>> {
+public class ImmutableMultisetDeserializer extends GuavaImmutableCollectionDeserializer<ImmutableMultiset<Object>>
+{
+    private static final long serialVersionUID = 1L;
 
     public ImmutableMultisetDeserializer(CollectionType type, TypeDeserializer typeDeser, JsonDeserializer<?> deser) {
         super(type, typeDeser, deser);

src/main/java/com/fasterxml/jackson/datatype/guava/deser/ImmutableSetDeserializer.java

@@ -8,6 +8,8 @@
 
 public class ImmutableSetDeserializer extends GuavaImmutableCollectionDeserializer<ImmutableSet<Object>>
 {
+    private static final long serialVersionUID = 1L;
+
     public ImmutableSetDeserializer(CollectionType type,
             TypeDeserializer typeDeser, JsonDeserializer<?> deser)
     {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/ImmutableSortedSetDeserializer.java

@@ -8,6 +8,8 @@
 
 public class ImmutableSortedSetDeserializer extends GuavaImmutableCollectionDeserializer<ImmutableSortedSet<Object>>
 {
+    private static final long serialVersionUID = 1L;
+
     public ImmutableSortedSetDeserializer(CollectionType type,
             TypeDeserializer typeDeser, JsonDeserializer<?> deser)
     {

src/main/java/com/fasterxml/jackson/datatype/guava/deser/LinkedHashMultisetDeserializer.java

@@ -5,7 +5,9 @@
 import com.fasterxml.jackson.databind.type.CollectionType;
 import com.google.common.collect.LinkedHashMultiset;
 
-public class LinkedHashMultisetDeserializer extends GuavaMultisetDeserializer<LinkedHashMultiset<Object>> {
+public class LinkedHashMultisetDeserializer extends GuavaMultisetDeserializer<LinkedHashMultiset<Object>>
+{
+    private static final long serialVersionUID = 1L;
 
     public LinkedHashMultisetDeserializer(CollectionType type, TypeDeserializer typeDeser, JsonDeserializer<?> deser) {
         super(type, typeDeser, deser);

src/main/java/com/fasterxml/jackson/datatype/guava/deser/TreeMultisetDeserializer.java

@@ -5,7 +5,9 @@
 import com.fasterxml.jackson.databind.type.CollectionType;
 import com.google.common.collect.TreeMultiset;
 
-public class TreeMultisetDeserializer extends GuavaMultisetDeserializer<TreeMultiset<Object>> {
+public class TreeMultisetDeserializer extends GuavaMultisetDeserializer<TreeMultiset<Object>>
+{
+    private static final long serialVersionUID = 1L;
 
     public TreeMultisetDeserializer(CollectionType type, TypeDeserializer typeDeser, JsonDeserializer<?> deser) {
         super(type, typeDeser, deser);

src/main/java/com/fasterxml/jackson/datatype/guava/deser/multimap/GuavaMultimapDeserializer.java

@@ -97,6 +97,7 @@ private static Method findTransformer(Class<?> rawType) {
      * We need to use this method to properly handle possible contextual variants of key and value
      * deserializers, as well as type deserializers.
      */
+    @Override
     public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
             BeanProperty property) throws JsonMappingException {
         KeyDeserializer kd = keyDeserializer;
@@ -117,7 +118,7 @@ public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
 
     protected abstract JsonDeserializer<?> _createContextual(MapLikeType type,
             KeyDeserializer keyDeserializer, TypeDeserializer typeDeserializer,
-            JsonDeserializer elementDeserializer, Method method);
+            JsonDeserializer<?> elementDeserializer, Method method);
 
     @Override
     public T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException,

src/main/java/com/fasterxml/jackson/datatype/guava/deser/multimap/list/ArrayListMultimapDeserializer.java

@@ -36,7 +36,7 @@ protected ArrayListMultimap<Object, Object> createMultimap() {
     @Override
     protected JsonDeserializer<?> _createContextual(MapLikeType type,
             KeyDeserializer keyDeserializer, TypeDeserializer typeDeserializer,
-            JsonDeserializer elementDeserializer, Method method) {
+            JsonDeserializer<?> elementDeserializer, Method method) {
         return new ArrayListMultimapDeserializer(type, keyDeserializer, typeDeserializer,
                 elementDeserializer, method);
     }

src/main/java/com/fasterxml/jackson/datatype/guava/deser/multimap/list/LinkedListMultimapDeserializer.java

@@ -14,9 +14,9 @@
  *
  * @author mvolkhart
  */
-public class LinkedListMultimapDeserializer extends GuavaMultimapDeserializer<LinkedListMultimap<Object,
-        Object>> {
-
+public class LinkedListMultimapDeserializer
+    extends GuavaMultimapDeserializer<LinkedListMultimap<Object,Object>>
+{
     public LinkedListMultimapDeserializer(MapLikeType type, KeyDeserializer keyDeserializer,
             TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer) {
         super(type, keyDeserializer, elementTypeDeserializer, elementDeserializer);
@@ -36,7 +36,7 @@ protected LinkedListMultimap<Object, Object> createMultimap() {
     @Override
     protected JsonDeserializer<?> _createContextual(MapLikeType type,
             KeyDeserializer keyDeserializer, TypeDeserializer typeDeserializer,
-            JsonDeserializer elementDeserializer, Method method) {
+            JsonDeserializer<?> elementDeserializer, Method method) {
         return new LinkedListMultimapDeserializer(type, keyDeserializer, typeDeserializer,
                 elementDeserializer, method);
     }

src/main/java/com/fasterxml/jackson/datatype/guava/deser/multimap/set/HashMultimapDeserializer.java

@@ -36,7 +36,7 @@ protected HashMultimap<Object, Object> createMultimap() {
     @Override
     protected JsonDeserializer<?> _createContextual(MapLikeType type,
             KeyDeserializer keyDeserializer, TypeDeserializer typeDeserializer,
-            JsonDeserializer elementDeserializer, Method method) {
+            JsonDeserializer<?> elementDeserializer, Method method) {
         return new HashMultimapDeserializer(type, keyDeserializer, typeDeserializer,
                 elementDeserializer, method);
     }

src/main/java/com/fasterxml/jackson/datatype/guava/deser/multimap/set/LinkedHashMultimapDeserializer.java

@@ -36,7 +36,7 @@ protected LinkedHashMultimap<Object, Object> createMultimap() {
     @Override
     protected JsonDeserializer<?> _createContextual(MapLikeType type,
             KeyDeserializer keyDeserializer, TypeDeserializer typeDeserializer,
-            JsonDeserializer elementDeserializer, Method method) {
+            JsonDeserializer<?> elementDeserializer, Method method) {
         return new LinkedHashMultimapDeserializer(type, keyDeserializer, typeDeserializer,
                 elementDeserializer, method);
     }

src/main/java/com/fasterxml/jackson/datatype/guava/ser/MultimapSerializer.java

@@ -18,11 +18,11 @@ public class MultimapSerializer
     extends JsonSerializer<Multimap<?, ?>>
     implements ContextualSerializer
 {
-    private final MapLikeType type;
-    private final BeanProperty property;
-    private final JsonSerializer<Object> keySerializer;
-    private final TypeSerializer valueTypeSerializer;
-    private final JsonSerializer<Object> valueSerializer;
+    private final MapLikeType _type;
+    private final BeanProperty _property;
+    private final JsonSerializer<Object> _keySerializer;
+    private final TypeSerializer _valueTypeSerializer;
+    private final JsonSerializer<Object> _valueSerializer;
 
     public MultimapSerializer(SerializationConfig config,
             MapLikeType type,
@@ -31,32 +31,30 @@ public MultimapSerializer(SerializationConfig config,
             TypeSerializer valueTypeSerializer,
             JsonSerializer<Object> valueSerializer)
     {
-        this.type = type;
-        this.property = null;
-        this.keySerializer = keySerializer;
-        this.valueTypeSerializer = valueTypeSerializer;
-        this.valueSerializer = valueSerializer;
+        _type = type;
+        _property = null;
+        _keySerializer = keySerializer;
+        _valueTypeSerializer = valueTypeSerializer;
+        _valueSerializer = valueSerializer;
     }
 
     @SuppressWarnings("unchecked")
     protected MultimapSerializer(MultimapSerializer src, BeanProperty property,
                 JsonSerializer<?> keySerializer,
                 TypeSerializer valueTypeSerializer, JsonSerializer<?> valueSerializer)
     {
-        this.type = src.type;
-        this.property = property;
-        this.keySerializer = (JsonSerializer<Object>) keySerializer;
-        this.valueTypeSerializer = valueTypeSerializer;
-        this.valueSerializer = (JsonSerializer<Object>) valueSerializer;
+        _type = src._type;
+        _property = property;
+        _keySerializer = (JsonSerializer<Object>) keySerializer;
+        _valueTypeSerializer = valueTypeSerializer;
+        _valueSerializer = (JsonSerializer<Object>) valueSerializer;
     }
-
-
+
     protected MultimapSerializer withResolved(BeanProperty property,
-            JsonSerializer<?> keySerializer,
-            TypeSerializer valueTypeSerializer, JsonSerializer<?> valueSerializer)
+            JsonSerializer<?> keySer,
+            TypeSerializer vts, JsonSerializer<?> valueSer)
     {
-        return new MultimapSerializer(this, property, keySerializer,
-                valueTypeSerializer, valueSerializer);
+        return new MultimapSerializer(this, property, keySer, vts, valueSer);
     }
 
     /*
@@ -65,26 +63,27 @@ protected MultimapSerializer withResolved(BeanProperty property,
     /**********************************************************
      */
 
+    @Override
     public JsonSerializer<?> createContextual(SerializerProvider provider,
             BeanProperty property) throws JsonMappingException
     {
-        JsonSerializer<?> valueSer = valueSerializer;
+        JsonSerializer<?> valueSer = _valueSerializer;
         if (valueSer == null) { // if type is final, can actually resolve:
-            JavaType valueType = type.getContentType();
+            JavaType valueType = _type.getContentType();
             if (valueType.isFinal()) {
                 valueSer = provider.findValueSerializer(valueType, property);
             }
         } else if (valueSer instanceof ContextualSerializer) {
             valueSer = ((ContextualSerializer) valueSer).createContextual(provider, property);
         }
-        JsonSerializer<?> keySer = keySerializer;
+        JsonSerializer<?> keySer = _keySerializer;
         if (keySer == null) {
-            keySer = provider.findKeySerializer(type.getKeyType(), property);
+            keySer = provider.findKeySerializer(_type.getKeyType(), property);
         } else if (keySer instanceof ContextualSerializer) {
             keySer = ((ContextualSerializer) keySer).createContextual(provider, property);
         }
         // finally, TypeSerializers may need contextualization as well
-        TypeSerializer typeSer = valueTypeSerializer;
+        TypeSerializer typeSer = _valueTypeSerializer;
         if (typeSer != null) {
             typeSer = typeSer.forProperty(property);
         }
@@ -122,17 +121,17 @@ private final void serializeFields(Multimap<?, ?> value, JsonGenerator jgen, Ser
             throws IOException, JsonProcessingException
     {
         for (Entry<?, ? extends Collection<?>> e : value.asMap().entrySet()) {
-            if (keySerializer != null) {
-                keySerializer.serialize(e.getKey(), jgen, provider);
+            if (_keySerializer != null) {
+                _keySerializer.serialize(e.getKey(), jgen, provider);
             } else {
-                provider.findKeySerializer(provider.constructType(String.class), property)
+                provider.findKeySerializer(provider.constructType(String.class), _property)
                     .serialize(e.getKey(), jgen, provider);
             }
-            if (valueSerializer != null) {
+            if (_valueSerializer != null) {
                 // note: value is a List, but generic type is for contents... so:
                 jgen.writeStartArray();
                 for (Object vv : e.getValue()) {
-                    valueSerializer.serialize(vv, jgen, provider);
+                    _valueSerializer.serialize(vv, jgen, provider);
                 }
                 jgen.writeEndArray();
             } else {

src/test/java/com/fasterxml/jackson/datatype/guava/TestImmutables.java

@@ -3,10 +3,9 @@
 import java.util.Iterator;
 
 import com.fasterxml.jackson.core.type.TypeReference;
-
+import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
-
 import com.google.common.collect.*;
 
 /**
@@ -122,10 +121,16 @@ public void testImmutableSortedSet() throws Exception
     public void testImmutableMap() throws Exception
     {
         ObjectMapper mapper = mapperWithModule();
-        ImmutableMap<Integer,Boolean> map = mapper.readValue("{\"12\":true,\"4\":false}", new TypeReference<ImmutableMap<Integer,Boolean>>() { });
+        final JavaType type = mapper.getTypeFactory().constructType(new TypeReference<ImmutableMap<Integer,Boolean>>() { });
+        ImmutableMap<Integer,Boolean> map = mapper.readValue("{\"12\":true,\"4\":false}", type);
         assertEquals(2, map.size());
         assertEquals(Boolean.TRUE, map.get(Integer.valueOf(12)));
         assertEquals(Boolean.FALSE, map.get(Integer.valueOf(4)));
+
+        // [Issue#29]
+        map = mapper.readValue("{}", type);
+        assertNotNull(map);
+        assertEquals(0, map.size());
     }
 
     public void testImmutableSortedMap() throws Exception

src/test/java/com/fasterxml/jackson/datatype/guava/TestMultimaps.java

@@ -154,7 +154,9 @@ public void testForwardingSetMultimap() {
 
     }
 
-    private SetMultimap<String, String> setBasedHelper(TypeReference type) throws IOException {
+    private SetMultimap<String, String> setBasedHelper(TypeReference<?> type)
+            throws IOException
+    {
         SetMultimap<String, String> map = MAPPER.readValue(StringStringMultimap, type);
         assertEquals(3, map.size());
         assertTrue(map.containsEntry("first", "abc"));
@@ -183,7 +185,7 @@ public void testLinkedListMultimap() throws IOException {
         assertTrue(map instanceof LinkedListMultimap);
     }
 
-    private ListMultimap<String, String> listBasedHelper(TypeReference type) throws IOException {
+    private ListMultimap<String, String> listBasedHelper(TypeReference<?> type) throws IOException {
         ListMultimap<String, String> map = MAPPER.readValue(StringStringMultimap, type);
         assertEquals(4, map.size());
         assertTrue(map.remove("first", "abc"));