fix gh-1672, support @RequestParam without a value

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/feign/support/SpringMvcContract.java

@@ -28,7 +28,6 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
-import org.springframework.beans.BeanUtils;
 import org.springframework.cloud.netflix.feign.AnnotatedParameterProcessor;
 import org.springframework.cloud.netflix.feign.annotation.PathVariableParameterProcessor;
 import org.springframework.cloud.netflix.feign.annotation.RequestHeaderParameterProcessor;
@@ -324,9 +323,7 @@ public class SpringMvcContract extends Contract.BaseContract
 		// has a parameter name
 		return parameterNames != null && parameterNames.length > parameterIndex
 				// has a type
-				&& parameterTypes != null && parameterTypes.length > parameterIndex
-				// and it is a simple property
-				&& BeanUtils.isSimpleProperty(parameterTypes[parameterIndex].getClass());
+				&& parameterTypes != null && parameterTypes.length > parameterIndex;
 	}
 
 	private class SimpleAnnotatedParameterContext

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/feign/support/SpringMvcContractTests.java

@@ -298,6 +298,19 @@ public class SpringMvcContractTests {
 	}
 
 	@Test
+	public void testProcessAnnotations_ListParamsWithoutName() throws Exception {
+		Method method = TestTemplate_ListParamsWithoutName.class.getDeclaredMethod("getTest",
+				List.class);
+		MethodMetadata data = this.contract
+				.parseAndValidateMetadata(method.getDeclaringClass(), method);
+
+		assertEquals("/test", data.template().url());
+		assertEquals("GET", data.template().method());
+		assertEquals("[{id}]", data.template().queries().get("id").toString());
+		assertNotNull(data.indexToExpander().get(0));
+	}
+
+	@Test
 	public void testProcessAnnotations_MapParams() throws Exception {
 		Method method = TestTemplate_MapParams.class.getDeclaredMethod("getTest",
 				Map.class);
@@ -457,6 +470,11 @@ public class SpringMvcContractTests {
 		ResponseEntity<TestObject> getTest(@RequestParam("id") List<String> id);
 	}
 
+	public interface TestTemplate_ListParamsWithoutName {
+		@RequestMapping(value = "/test", method = RequestMethod.GET)
+		ResponseEntity<TestObject> getTest(@RequestParam List<String> id);
+	}
+
 	public interface TestTemplate_MapParams {
 		@RequestMapping(value = "/test", method = RequestMethod.GET)
 		ResponseEntity<TestObject> getTest(@RequestParam Map<String, String> params);