Polish SecurityJacksonModules

Issue gh-3736
* ClassLoader argument - this is required because we do not want to assume
the ClassLoader that should be used
* Clean up logging - logging is now at debug level because we don't expect
all of the modules are loaded (they are quite possibly off the ClassPath)
* Remove ObjectUtils as it was being used on methods that expect a
Collection or Array with non collection based objects
* Polish Javadoc warnings

cas/src/test/java/org/springframework/security/cas/jackson2/CasAuthenticationTokenMixinTests.java

@@ -71,8 +71,9 @@ public class CasAuthenticationTokenMixinTests {
 	}
 
 	ObjectMapper buildObjectMapper() {
+		ClassLoader loader = getClass().getClassLoader();
 		ObjectMapper mapper = new ObjectMapper();
-		mapper.registerModules(SecurityJacksonModules.getModules());
+		mapper.registerModules(SecurityJacksonModules.getModules(loader));
 		return mapper;
 	}
 

core/src/main/java/org/springframework/security/jackson2/SecurityJacksonModules.java

@@ -23,7 +23,6 @@ import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.ObjectUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -63,41 +62,42 @@ public final class SecurityJacksonModules {
 	}
 
 	public static void enableDefaultTyping(ObjectMapper mapper) {
-		if(!ObjectUtils.isEmpty(mapper)) {
+		if(mapper != null) {
 			TypeResolverBuilder<?> typeBuilder = mapper.getDeserializationConfig().getDefaultTyper(null);
-			if (ObjectUtils.isEmpty(typeBuilder)) {
+			if (typeBuilder == null) {
 				mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);
 			}
 		}
 	}
 
-	private static Module loadAndGetInstance(String className) {
+	@SuppressWarnings("unchecked")
+	private static Module loadAndGetInstance(String className, ClassLoader loader) {
 		Module instance = null;
 		try {
-			logger.debug("Loading module " + className);
-			Class<? extends Module> securityModule = (Class<? extends Module>) ClassUtils.forName(className, ClassUtils.getDefaultClassLoader());
-			if (!ObjectUtils.isEmpty(securityModule)) {
-				logger.debug("Loaded module " + className + ", now registering");
+			Class<? extends Module> securityModule = (Class<? extends Module>) ClassUtils.forName(className, loader);
+			if (securityModule != null) {
+				if(logger.isDebugEnabled()) {
+					logger.debug("Loaded module " + className + ", now registering");
+				}
 				instance = securityModule.newInstance();
 			}
-		} catch (ClassNotFoundException e) {
-			logger.warn("Module class not found : " + e.getMessage());
-		} catch (InstantiationException e) {
-			logger.error(e.getMessage());
-		} catch (IllegalAccessException e) {
-			logger.error(e.getMessage());
+		} catch (Exception e) {
+			if(logger.isDebugEnabled()) {
+				logger.debug("Cannot load module " + className, e);
+			}
 		}
 		return instance;
 	}
 
 	/**
+	 * @param loader the ClassLoader to use
 	 * @return List of available security modules in classpath.
 	 */
-	public static List<Module> getModules() {
+	public static List<Module> getModules(ClassLoader loader) {
 		List<Module> modules = new ArrayList<Module>();
 		for (String className : securityJackson2ModuleClasses) {
-			Module module = loadAndGetInstance(className);
-			if (!ObjectUtils.isEmpty(module)) {
+			Module module = loadAndGetInstance(className, loader);
+			if (module != null) {
 				modules.add(module);
 			}
 		}

core/src/test/java/org/springframework/security/jackson2/AbstractMixinTests.java

@@ -37,7 +37,8 @@ public abstract class AbstractMixinTests {
 	protected ObjectMapper buildObjectMapper() {
 		if (ObjectUtils.isEmpty(mapper)) {
 			mapper = new ObjectMapper();
-			mapper.registerModules(SecurityJacksonModules.getModules());
+			ClassLoader loader = getClass().getClassLoader();
+			mapper.registerModules(SecurityJacksonModules.getModules(loader));
 		}
 		return mapper;
 	}

web/src/main/java/org/springframework/security/web/jackson2/WebJackson2Module.java

@@ -37,7 +37,7 @@ import javax.servlet.http.Cookie;
  *     ObjectMapper mapper = new ObjectMapper();
  *     mapper.registerModule(new WebJackson2Module());
  * </pre>
- * <b>Note: use {@link SecurityJacksonModules#getModules()} to get list of all security modules.</b>
+ * <b>Note: use {@link SecurityJacksonModules#getModules(ClassLoader)} to get list of all security modules.</b>
  *
  * @author Jitendra Singh
  * @see SecurityJacksonModules

web/src/test/java/org/springframework/security/web/jackson2/AbstractMixinTests.java

@@ -34,7 +34,8 @@ public abstract class AbstractMixinTests {
 	protected ObjectMapper buildObjectMapper() {
 		if (ObjectUtils.isEmpty(mapper)) {
 			mapper = new ObjectMapper();
-			mapper.registerModules(SecurityJacksonModules.getModules());
+			ClassLoader loader = getClass().getClassLoader();
+			mapper.registerModules(SecurityJacksonModules.getModules(loader));
 		}
 		return mapper;
 	}

web/src/test/java/org/springframework/security/web/jackson2/CookieMixinTests.java

@@ -39,7 +39,8 @@ public class CookieMixinTests {
 
 	ObjectMapper buildObjectMapper() {
 		ObjectMapper mapper = new ObjectMapper();
-		mapper.registerModules(SecurityJacksonModules.getModules());
+		ClassLoader loader = getClass().getClassLoader();
+		mapper.registerModules(SecurityJacksonModules.getModules(loader));
 		return mapper;
 	}
 

web/src/test/java/org/springframework/security/web/jackson2/DefaultCsrfTokenMixinTests.java

@@ -45,7 +45,8 @@ public class DefaultCsrfTokenMixinTests {
 	@Before
 	public void setup() {
 		objectMapper = new ObjectMapper();
-		objectMapper.registerModules(SecurityJacksonModules.getModules());
+		ClassLoader loader = getClass().getClassLoader();
+		objectMapper.registerModules(SecurityJacksonModules.getModules(loader));
 		defaultCsrfTokenJson = "{\"@class\": \"org.springframework.security.web.csrf.DefaultCsrfToken\", " +
 				"\"headerName\": \"csrf-header\", \"parameterName\": \"_csrf\", \"token\": \"1\"}";
 	}

web/src/test/java/org/springframework/security/web/jackson2/WebAuthenticationDetailsMixinTests.java

@@ -48,7 +48,8 @@ public class WebAuthenticationDetailsMixinTests {
 	@Before
 	public void setup() {
 		this.mapper = new ObjectMapper();
-		this.mapper.registerModules(SecurityJacksonModules.getModules());
+		ClassLoader loader = getClass().getClassLoader();
+		this.mapper.registerModules(SecurityJacksonModules.getModules(loader));
 	}
 
 	@Test