Polish "Add support for Jersey WrappingResourceConfig"

Closes gh-13117

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jersey/JerseyAutoConfiguration.java

@@ -117,8 +117,8 @@ public class JerseyAutoConfiguration implements ServletContextAware {
 			this.path = parseApplicationPath(this.jersey.getApplicationPath());
 		}
 		else {
-			this.path = findApplicationPath(AnnotationUtils
+			this.path = findApplicationPath(AnnotationUtils.findAnnotation(
-					.findAnnotation(this.config.getApplication().getClass(), ApplicationPath.class));
+					this.config.getApplication().getClass(), ApplicationPath.class));
 		}
 	}
 

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jersey/JerseyAutoConfigurationCustomApplicationTests.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2012-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure.jersey;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.core.Application;
+
+import org.glassfish.jersey.server.ResourceConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link JerseyAutoConfiguration} when using a custom {@link Application}.
+ *
+ * @author Stephane Nicoll
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+@DirtiesContext
+public class JerseyAutoConfigurationCustomApplicationTests {
+
+
+	@Autowired
+	private TestRestTemplate restTemplate;
+
+	@Test
+	public void contextLoads() {
+		ResponseEntity<String> entity = this.restTemplate.getForEntity("/test/hello",
+				String.class);
+		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+	}
+
+	@ApplicationPath("/test")
+	public static class TestApplication extends Application {
+
+	}
+
+	@Path("/hello")
+	public static class TestController {
+
+		@GET
+		public String message() {
+			return "Hello World";
+		}
+
+	}
+
+	@Configuration
+	@Import({ EmbeddedServletContainerAutoConfiguration.class,
+			ServerPropertiesAutoConfiguration.class, JerseyAutoConfiguration.class,
+			PropertyPlaceholderAutoConfiguration.class })
+	static class TestConfiguration {
+
+		@Configuration
+		public class JerseyConfiguration {
+
+			@Bean
+			public TestApplication testApplication() {
+				return new TestApplication();
+			}
+
+			@Bean
+			public ResourceConfig conf(TestApplication app) {
+				ResourceConfig config = ResourceConfig.forApplication(app);
+				config.register(TestController.class);
+				return config;
+			}
+
+		}
+
+	}
+
+}