fix

Author: zeitlinger

api/all/src/main/java/io/opentelemetry/api/common/AttributesBuilder.java

@@ -111,7 +111,7 @@ default AttributesBuilder put(String key, String... value) {
    *
    * @return this Builder
    */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // cast to T
   default <T> AttributesBuilder put(AttributeKey<List<T>> key, T... value) {
     if (value == null) {
       return this;

api/incubator/src/main/java/io/opentelemetry/api/incubator/common/ExtendedAttributesBuilder.java

@@ -117,7 +117,7 @@ default ExtendedAttributesBuilder put(String key, String... value) {
    *
    * @return this Builder
    */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // use of raw AttributeKey
   default <T> ExtendedAttributesBuilder put(AttributeKey<List<T>> key, T... value) {
     if (value == null) {
       return this;

context/src/main/java/io/opentelemetry/context/internal/shaded/WeakConcurrentMap.java

@@ -135,7 +135,7 @@ public WeakConcurrentMap(
   }
 
   @Override
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // safe cast to LookupKey<K>
   protected LookupKey<K> getLookupKey(K key) {
     LookupKey<K> lookupKey;
     if (reuseKeys) {

exporters/common/src/main/java/io/opentelemetry/exporter/internal/marshal/MarshalerContext.java

@@ -138,15 +138,15 @@ void reset() {
   private final Pool<Map<?, ?>> mapPool = new Pool<>(IdentityHashMap::new, Map::clear);
 
   /** Returns a pooled identity map. */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // generic K,V
   public <K, V> Map<K, V> getIdentityMap() {
     return (Map<K, V>) mapPool.get();
   }
 
   private final Pool<List<?>> listPool = new Pool<>(ArrayList::new, List::clear);
 
   /** Returns a pooled list. */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // generic T
   public <T> List<T> getList() {
     return (List<T>) listPool.get();
   }

exporters/common/src/main/java/io/opentelemetry/exporter/internal/marshal/Serializer.java

@@ -518,7 +518,7 @@ public abstract <T> void serializeRepeatedMessageWithContext(
    * together with {@link StatelessMarshalerUtil#sizeRepeatedMessageWithContext(ProtoFieldInfo,
    * Collection, StatelessMarshaler, MarshalerContext, MarshalerContext.Key)}.
    */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // cast to List<T>
   public <T> void serializeRepeatedMessageWithContext(
       ProtoFieldInfo field,
       Collection<? extends T> messages,

exporters/common/src/main/java/io/opentelemetry/exporter/internal/marshal/StatelessMarshalerUtil.java

@@ -144,7 +144,7 @@ public static <T> int sizeRepeatedMessageWithContext(
    * together with {@link Serializer#serializeRepeatedMessageWithContext(ProtoFieldInfo, Collection,
    * StatelessMarshaler, MarshalerContext, MarshalerContext.Key)}.
    */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // safe cast to List<T>
   public static <T> int sizeRepeatedMessageWithContext(
       ProtoFieldInfo field,
       Collection<? extends T> messages,

exporters/otlp/common/src/main/java/io/opentelemetry/exporter/internal/otlp/AttributeKeyValue.java

@@ -32,7 +32,7 @@ static <T> AttributeKeyValue<T> of(AttributeKey<T> attributeKey, T value) {
   }
 
   /** Returns a List corresponding to the provided Map. This is a copy, not a view. */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // Safe as we are just iterating over the map entries
   static <T> List<AttributeKeyValue<?>> of(Attributes attributes) {
     List<AttributeKeyValue<?>> result = new ArrayList<>(attributes.size());
     attributes.forEach(

exporters/otlp/common/src/main/java/io/opentelemetry/exporter/internal/otlp/IncubatingUtil.java

@@ -80,7 +80,7 @@ public void accept(ExtendedAttributeKey<?> attributeKey, Object o) {
   }
 
   // TODO(jack-berg): move to KeyValueMarshaler when ExtendedAttributes is stable
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // casting to specific types based on attributeKey type
   private static KeyValueMarshaler create(ExtendedAttributeKey<?> attributeKey, Object value) {
     byte[] keyUtf8;
     if (attributeKey.getKey().isEmpty()) {

sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/fileconfig/YamlDeclarativeConfigProperties.java

@@ -73,7 +73,7 @@ private YamlDeclarativeConfigProperties(
    *
    * @see DeclarativeConfiguration#toConfigProperties(Object)
    */
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // Safe due to type checks
   public static YamlDeclarativeConfigProperties create(
       Map<String, Object> properties, ComponentLoader componentLoader) {
     Map<String, Object> simpleEntries = new LinkedHashMap<>();

sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/metric/viewconfig/ViewConfig.java

@@ -94,7 +94,7 @@ public static void registerViews(
   }
 
   // Visible for testing
-  @SuppressWarnings("unchecked")
+  @SuppressWarnings("unchecked") // safe due to isInstance checks
   static List<ViewConfigSpecification> loadViewConfig(InputStream inputStream) {
     LoadSettings settings = LoadSettings.builder().build();
     Load yaml = new Load(settings);