DATAKV-117 - Pass on type information to KV Adapter.

Original pull request: #18.

Author: christophstrobl

src/main/java/org/springframework/data/keyvalue/core/AbstractKeyValueAdapter.java

@@ -57,6 +57,33 @@ protected AbstractKeyValueAdapter(QueryEngine<? extends KeyValueAdapter, ?, ?> e
 		return engine;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.keyvalue.core.KeyValueAdapter#get(java.io.Serializable, java.io.Serializable, java.lang.Class)
+	 */
+	@Override
+	public <T> T get(Serializable id, Serializable keyspace, Class<T> type) {
+		return (T) get(id, keyspace);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.keyvalue.core.KeyValueAdapter#get(java.io.Serializable, java.io.Serializable, java.lang.Class)
+	 */
+	@Override
+	public <T> T delete(Serializable id, Serializable keyspace, Class<T> type) {
+		return (T) delete(id, keyspace);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.keyvalue.core.KeyValueAdapter#get(java.io.Serializable, java.io.Serializable, java.lang.Class)
+	 */
+	@Override
+	public <T> Iterable<T> find(KeyValueQuery<?> query, Serializable keyspace, Class<T> type) {
+		return (Iterable<T>) engine.execute(query, keyspace, type);
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.keyvalue.core.KeyValueAdapter#find(org.springframework.data.keyvalue.core.query.KeyValueQuery, java.io.Serializable)

src/main/java/org/springframework/data/keyvalue/core/KeyValueAdapter.java

@@ -58,6 +58,15 @@ public interface KeyValueAdapter extends DisposableBean {
 	 */
 	Object get(Serializable id, Serializable keyspace);
 
+	/**
+	 * @param id
+	 * @param keyspace
+	 * @param type
+	 * @return
+	 * @since 1.1
+	 */
+	<T> T get(Serializable id, Serializable keyspace, Class<T> type);
+
 	/**
 	 * Delete and return the obect with given type and id.
 	 * 
@@ -67,6 +76,15 @@ public interface KeyValueAdapter extends DisposableBean {
 	 */
 	Object delete(Serializable id, Serializable keyspace);
 
+	/**
+	 * @param id
+	 * @param keyspace
+	 * @param type
+	 * @return
+	 * @since 1.1
+	 */
+	<T> T delete(Serializable id, Serializable keyspace, Class<T> type);
+
 	/**
 	 * Get all elements for given keyspace.
 	 * 
@@ -104,6 +122,15 @@ public interface KeyValueAdapter extends DisposableBean {
 	 */
 	Iterable<?> find(KeyValueQuery<?> query, Serializable keyspace);
 
+	/**
+	 * @param query
+	 * @param keyspace
+	 * @param type
+	 * @return
+	 * @since 1.1
+	 */
+	<T> Iterable<T> find(KeyValueQuery<?> query, Serializable keyspace, Class<T> type);
+
 	/**
 	 * Count number of objects within {@literal keyspace}.
 	 * 

src/main/java/org/springframework/data/keyvalue/core/KeyValueTemplate.java

@@ -271,7 +271,7 @@ public <T> T findById(final Serializable id, final Class<T> type) {
 			@Override
 			public T doInKeyValue(KeyValueAdapter adapter) {
 
-				Object result = adapter.get(id, keyspace);
+				Object result = adapter.get(id, keyspace, type);
 
 				if (result == null || typeCheck(type, result)) {
 					return (T) result;
@@ -342,10 +342,9 @@ public <T> T delete(final Serializable id, final Class<T> type) {
 
 		T result = execute(new KeyValueCallback<T>() {
 
-			@SuppressWarnings("unchecked")
 			@Override
 			public T doInKeyValue(KeyValueAdapter adapter) {
-				return (T) adapter.delete(id, keyspace);
+				return (T) adapter.delete(id, keyspace, type);
 			}
 		});
 
@@ -394,7 +393,7 @@ public <T> Iterable<T> find(final KeyValueQuery<?> query, final Class<T> type) {
 			@Override
 			public Iterable<T> doInKeyValue(KeyValueAdapter adapter) {
 
-				Iterable<?> result = adapter.find(query, resolveKeySpace(type));
+				Iterable<?> result = adapter.find(query, resolveKeySpace(type), type);
 				if (result == null) {
 					return Collections.emptySet();
 				}

src/main/java/org/springframework/data/keyvalue/core/QueryEngine.java

@@ -56,6 +56,21 @@ public Collection<?> execute(KeyValueQuery<?> query, Serializable keyspace) {
 		return execute(criteria, sort, query.getOffset(), query.getRows(), keyspace);
 	}
 
+	/**
+	 * Extract query attributes and delegate to concrete execution.
+	 * 
+	 * @param query
+	 * @param keyspace
+	 * @return
+	 */
+	public <T> Collection<T> execute(KeyValueQuery<?> query, Serializable keyspace, Class<T> type) {
+
+		CRITERIA criteria = this.criteriaAccessor != null ? this.criteriaAccessor.resolve(query) : null;
+		SORT sort = this.sortAccessor != null ? this.sortAccessor.resolve(query) : null;
+
+		return execute(criteria, sort, query.getOffset(), query.getRows(), keyspace, type);
+	}
+
 	/**
 	 * Extract query attributes and delegate to concrete execution.
 	 * 
@@ -79,6 +94,21 @@ public long count(KeyValueQuery<?> query, Serializable keyspace) {
 	 */
 	public abstract Collection<?> execute(CRITERIA criteria, SORT sort, int offset, int rows, Serializable keyspace);
 
+	/**
+	 * @param criteria
+	 * @param sort
+	 * @param offset
+	 * @param rows
+	 * @param keyspace
+	 * @param type
+	 * @return
+	 * @since 1.1
+	 */
+	public <T> Collection<T> execute(CRITERIA criteria, SORT sort, int offset, int rows, Serializable keyspace,
+			Class<T> type) {
+		return (Collection<T>) execute(criteria, sort, offset, rows, keyspace);
+	}
+
 	/**
 	 * @param criteria
 	 * @param keyspace

src/test/java/org/springframework/data/keyvalue/core/KeyValueTemplateUnitTests.java

@@ -212,7 +212,7 @@ public void findByIdShouldReturnObjectWithMatchingIdAndType() {
 
 		template.findById("1", Foo.class);
 
-		verify(adapterMock, times(1)).get("1", Foo.class.getName());
+		verify(adapterMock, times(1)).get("1", Foo.class.getName(), Foo.class);
 	}
 
 	/**
@@ -250,7 +250,7 @@ public void findShouldCallFindOnAdapterToResolveMatching() {
 
 		template.find(STRING_QUERY, Foo.class);
 
-		verify(adapterMock, times(1)).find(STRING_QUERY, Foo.class.getName());
+		verify(adapterMock, times(1)).find(STRING_QUERY, Foo.class.getName(), Foo.class);
 	}
 
 	/**
@@ -264,7 +264,7 @@ public void findInRangeShouldRespectOffset() {
 
 		template.findInRange(1, 5, Foo.class);
 
-		verify(adapterMock, times(1)).find(captor.capture(), eq(Foo.class.getName()));
+		verify(adapterMock, times(1)).find(captor.capture(), eq(Foo.class.getName()), eq(Foo.class));
 		assertThat(captor.getValue().getOffset(), is(1));
 		assertThat(captor.getValue().getRows(), is(5));
 		assertThat(captor.getValue().getCritieria(), nullValue());
@@ -327,7 +327,7 @@ public void deleteShouldRemoveObjectCorrectly() {
 
 		template.delete("1", Foo.class);
 
-		verify(adapterMock, times(1)).delete("1", Foo.class.getName());
+		verify(adapterMock, times(1)).delete("1", Foo.class.getName(), Foo.class);
 	}
 
 	/**
@@ -341,7 +341,7 @@ public void deleteRemovesObjectUsingExtractedId() {
 
 		template.delete(source);
 
-		verify(adapterMock, times(1)).delete("some-id", ClassWithStringId.class.getName());
+		verify(adapterMock, times(1)).delete("some-id", ClassWithStringId.class.getName(), ClassWithStringId.class);
 	}
 
 	/**
@@ -616,7 +616,7 @@ public void shouldPublishBeforeDeleteEventCorrectly() {
 	public void shouldPublishAfterDeleteEventCorrectly() {
 
 		setEventsToPublish(AfterDeleteEvent.class);
-		when(adapterMock.delete(eq("1"), eq(FOO_ONE.getClass().getName()))).thenReturn(FOO_ONE);
+		when(adapterMock.delete(eq("1"), eq(FOO_ONE.getClass().getName()), eq(Foo.class))).thenReturn(FOO_ONE);
 
 		template.delete("1", FOO_ONE.getClass());
 
@@ -663,7 +663,7 @@ public void shouldPublishAfterGetEventCorrectly() {
 
 		setEventsToPublish(AfterGetEvent.class);
 
-		when(adapterMock.get(eq("1"), eq(FOO_ONE.getClass().getName()))).thenReturn(FOO_ONE);
+		when(adapterMock.get(eq("1"), eq(FOO_ONE.getClass().getName()), eq(Foo.class))).thenReturn(FOO_ONE);
 
 		template.findById("1", FOO_ONE.getClass());