Polishing

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/CacheResolverAdapter.java

@@ -1,5 +1,20 @@
-package org.springframework.cache.jcache.interceptor;
+/*
+ * Copyright 2002-2018 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.cache.jcache.interceptor;
 
 import java.util.Collection;
 import java.util.Collections;
@@ -23,17 +38,19 @@ class CacheResolverAdapter implements CacheResolver {
 
 	private final javax.cache.annotation.CacheResolver target;
 
+
 	/**
 	 * Create a new instance with the JSR-107 cache resolver to invoke.
 	 */
 	public CacheResolverAdapter(javax.cache.annotation.CacheResolver target) {
-		Assert.notNull(target, "JSR-107 cache resolver must be set.");
+		Assert.notNull(target, "JSR-107 CacheResolver is required");
 		this.target = target;
 	}
 
+
 	/**
-	 * Return the underlying {@link javax.cache.annotation.CacheResolver} that this
-	 * instance is using.
+	 * Return the underlying {@link javax.cache.annotation.CacheResolver}
+	 * that this instance is using.
 	 */
 	protected javax.cache.annotation.CacheResolver getTarget() {
 		return target;
@@ -45,8 +62,10 @@ class CacheResolverAdapter implements CacheResolver {
 			throw new IllegalStateException("Unexpected context " + context);
 		}
 		CacheInvocationContext<?> cacheInvocationContext = (CacheInvocationContext<?>) context;
-		javax.cache.Cache<Object, Object> cache = target.resolveCache(cacheInvocationContext);
-		Assert.notNull(cache, () -> "Cannot resolve cache for '" + context + "' using '" + target + "'");
+		javax.cache.Cache<Object, Object> cache = this.target.resolveCache(cacheInvocationContext);
+		if (cache == null) {
+			throw new IllegalStateException("Could not resolve cache for " + context + " using " + this.target);
+		}
 		return Collections.singleton(new JCacheCache(cache));
 	}
 

spring-context-support/src/test/java/org/springframework/cache/jcache/interceptor/CacheResolverAdapterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -58,7 +58,7 @@ public class CacheResolverAdapterTests extends AbstractJCacheTests {
 		DefaultCacheInvocationContext<?> dummyContext = createDummyContext();
 		CacheResolverAdapter adapter = new CacheResolverAdapter(getCacheResolver(dummyContext, null));
 
-		thrown.expect(IllegalArgumentException.class);
+		thrown.expect(IllegalStateException.class);
 		adapter.resolveCaches(dummyContext);
 	}
 

spring-context/src/main/java/org/springframework/cache/interceptor/CacheResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -35,6 +35,7 @@ public interface CacheResolver {
 	 * Return the cache(s) to use for the specified invocation.
 	 * @param context the context of the particular invocation
 	 * @return the cache(s) to use (never {@code null})
+	 * @throws IllegalStateException if cache resolution failed
 	 */
 	Collection<? extends Cache> resolveCaches(CacheOperationInvocationContext<?> context);
 

spring-messaging/src/main/java/org/springframework/messaging/handler/annotation/support/HeadersMethodArgumentResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -26,7 +26,6 @@ import org.springframework.messaging.MessageHeaders;
 import org.springframework.messaging.handler.annotation.Headers;
 import org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolver;
 import org.springframework.messaging.support.MessageHeaderAccessor;
-import org.springframework.util.Assert;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -46,16 +45,13 @@ public class HeadersMethodArgumentResolver implements HandlerMethodArgumentResol
 	public boolean supportsParameter(MethodParameter parameter) {
 		Class<?> paramType = parameter.getParameterType();
 		return ((parameter.hasParameterAnnotation(Headers.class) && Map.class.isAssignableFrom(paramType)) ||
-				MessageHeaders.class == paramType ||
-				MessageHeaderAccessor.class.isAssignableFrom(paramType));
+				MessageHeaders.class == paramType || MessageHeaderAccessor.class.isAssignableFrom(paramType));
 	}
 
 	@Override
 	@Nullable
 	public Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception {
-
 		Class<?> paramType = parameter.getParameterType();
-
 		if (Map.class.isAssignableFrom(paramType)) {
 			return message.getHeaders();
 		}
@@ -70,7 +66,10 @@ public class HeadersMethodArgumentResolver implements HandlerMethodArgumentResol
 			}
 			else {
 				Method method = ReflectionUtils.findMethod(paramType, "wrap", Message.class);
-				Assert.notNull(method, () -> "Cannot create accessor of type " + paramType + " for message " +  message);
+				if (method == null) {
+					throw new IllegalStateException(
+							"Cannot create accessor of type " + paramType + " for message " + message);
+				}
 				return ReflectionUtils.invokeMethod(method, null, message);
 			}
 		}

spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodArgumentResolverComposite.java

@@ -25,7 +25,6 @@ import java.util.concurrent.ConcurrentHashMap;
 import org.springframework.core.MethodParameter;
 import org.springframework.lang.Nullable;
 import org.springframework.messaging.Message;
-import org.springframework.util.Assert;
 
 /**
  * Resolves method parameters by delegating to a list of registered
@@ -110,9 +109,10 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 	@Override
 	@Nullable
 	public Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception {
-
 		HandlerMethodArgumentResolver resolver = getArgumentResolver(parameter);
-		Assert.notNull(resolver, () -> "Unknown parameter type [" + parameter.getParameterType().getName() + "]");
+		if (resolver == null) {
+			throw new IllegalStateException("Unknown parameter type [" + parameter.getParameterType().getName() + "]");
+		}
 		return resolver.resolveArgument(parameter, message);
 	}
 

spring-oxm/src/main/java/org/springframework/oxm/jaxb/Jaxb2Marshaller.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -579,10 +579,10 @@ public class Jaxb2Marshaller implements MimeMarshaller, MimeUnmarshaller, Generi
 		XMLReader xmlReader = org.xml.sax.helpers.XMLReaderFactory.createXMLReader();
 		xmlReader.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
 		for (int i = 0; i < resources.length; i++) {
-			Resource currentResource = resources[i];
-			Assert.notNull(currentResource, "Resource is null");
-			Assert.isTrue(currentResource.exists(), () -> "Resource " + currentResource + " does not exist");
-			InputSource inputSource = SaxResourceUtils.createInputSource(currentResource);
+			Resource resource = resources[i];
+			Assert.notNull(resource, "Resource is null");
+			Assert.isTrue(resource.exists(), () -> "Resource " + resource + " does not exist");
+			InputSource inputSource = SaxResourceUtils.createInputSource(resource);
 			schemaSources[i] = new SAXSource(xmlReader, inputSource);
 		}
 		SchemaFactory schemaFactory = SchemaFactory.newInstance(schemaLanguage);
@@ -1060,12 +1060,12 @@ public class Jaxb2Marshaller implements MimeMarshaller, MimeUnmarshaller, Generi
 		}
 
 		@Override
-		public InputStream getInputStream() throws IOException {
+		public InputStream getInputStream() {
 			return new ByteArrayInputStream(this.data, this.offset, this.length);
 		}
 
 		@Override
-		public OutputStream getOutputStream() throws IOException {
+		public OutputStream getOutputStream() {
 			throw new UnsupportedOperationException();
 		}
 
@@ -1081,11 +1081,7 @@ public class Jaxb2Marshaller implements MimeMarshaller, MimeUnmarshaller, Generi
 	}
 
 
-	private static final EntityResolver NO_OP_ENTITY_RESOLVER = new EntityResolver() {
-		@Override
-		public InputSource resolveEntity(String publicId, String systemId) {
-			return new InputSource(new StringReader(""));
-		}
-	};
+	private static final EntityResolver NO_OP_ENTITY_RESOLVER =
+			(publicId, systemId) -> new InputSource(new StringReader(""));
 
 }