Fix #148

Author: cowtowncoder

protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufMapper.java

@@ -6,7 +6,7 @@
 import java.net.URL;
 
 import com.fasterxml.jackson.core.Version;
-
+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;
@@ -65,7 +65,6 @@ protected ProtobufMapper(ProtobufMapper src) {
     /**
      * @since 2.10
      */
-    @SuppressWarnings("unchecked")
     public static ProtobufMapper.Builder builder() {
         return new Builder(new ProtobufMapper());
     }
@@ -118,7 +117,9 @@ public void setSchemaLoader(ProtobufSchemaLoader l) {
      * given Java type. Uses {@link ProtobufSchemaGenerator} for
      * generation.
      *
-     * @since 2.8
+     * @param type Resolved type to generate {@link ProtobufSchema} for
+     *
+     * @return Generated {@link ProtobufSchema}
      */
     public ProtobufSchema generateSchemaFor(JavaType type) throws JsonMappingException
     {
@@ -129,8 +130,11 @@ public ProtobufSchema generateSchemaFor(JavaType type) throws JsonMappingExcepti
 
     /**
      * Convenience method for constructing protoc definition that matches
-     * given Java type. Uses {@link ProtobufSchemaGenerator} for
-     * generation.
+     * given Java type. Uses {@link ProtobufSchemaGenerator} for generation.
+     *
+     * @param type Type-erased type to generate {@link ProtobufSchema} for
+     *
+     * @return Generated {@link ProtobufSchema}
      *
      * @since 2.8
      */
@@ -141,6 +145,20 @@ public ProtobufSchema generateSchemaFor(Class<?> type) throws JsonMappingExcepti
         return gen.getGeneratedSchema();
     }
 
+    /**
+     * Convenience method for constructing protoc definition that matches
+     * given Java type. Uses {@link ProtobufSchemaGenerator} for generation.
+     *
+     * @param type Type to generate {@link ProtobufSchema} for
+     *
+     * @return Generated {@link ProtobufSchema}
+     *
+     * @since 2.10
+     */
+    public ProtobufSchema generateSchemaFor(TypeReference<?> type) throws JsonMappingException {
+        return generateSchemaFor(_typeFactory.constructType(type));
+    }
+
     /*
     /**********************************************************
     /* Schema access, FileDescriptorSets (since 2.9)

protobuf/src/test/java/com/fasterxml/jackson/dataformat/protobuf/EnumHandlingTest.java

@@ -1,5 +1,6 @@
 package com.fasterxml.jackson.dataformat.protobuf;
 
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectReader;
 import com.fasterxml.jackson.databind.ObjectWriter;
 import com.fasterxml.jackson.dataformat.protobuf.schema.ProtobufSchema;
@@ -49,7 +50,7 @@ public void testBigEnum() throws Exception
         // type + short id == 2 bytes
         assertEquals(2, bytes.length);
 
-        ObjectReader r =  MAPPER.readerFor(BigEnumWrapper.class).with(schema);
+        ObjectReader r =  MAPPER.readerFor(new TypeReference<BigEnumWrapper> () {}).with(schema);
         BigEnumWrapper result = r.readValue(bytes);
         assertEquals(input.value, result.value);
     }

release-notes/VERSION-2.x

@@ -8,6 +8,11 @@ Project: jackson-datatypes-binaryModules:
 === Releases ===
 ------------------------------------------------------------------------
 
+2.10.0 (not yet released)
+
+#148: (protobuf) Add `ProtobufMapper.generateSchemaFor(TypeReference<?>)` overload
+ (suggested by MrThreepwood@github)
+
 2.10.0.pr2 (31-Aug-2019)
 
 #168: (avro) `JsonMappingException` for union types with multiple Record types