diff options
Diffstat (limited to 'policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java')
-rw-r--r-- | policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java | 112 |
1 files changed, 59 insertions, 53 deletions
diff --git a/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java b/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java index bf59ec96..f618b4c9 100644 --- a/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java +++ b/policy-utils/src/main/java/org/onap/policy/drools/utils/ReflectionUtil.java @@ -2,7 +2,7 @@ * ============LICENSE_START======================================================= * policy-utils * ================================================================================ - * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved. * ================================================================================ * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -21,66 +21,72 @@ /** * */ + package org.onap.policy.drools.utils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; + /** - * Reflection utilities + * Reflection utilities. * */ public class ReflectionUtil { - - protected static final Logger logger = LoggerFactory.getLogger(ReflectionUtil.class); - private ReflectionUtil(){ - } - - /** - * returns (if exists) a class fetched from a given classloader - * - * @param classLoader the class loader - * @param className the class name - * @return the actual class - * @throws IllegalArgumentException if an invalid parameter has been passed in - */ - public static Class<?> fetchClass(ClassLoader classLoader, - String className) { - if (classLoader == null) - throw new IllegalArgumentException("A class loader must be provided"); - - if (className == null) - throw new IllegalArgumentException("A class name to be fetched in class loader " + - classLoader + " must be provided"); - - try { - return Class.forName(className, true, classLoader); - } catch (Exception e) { - logger.error("class {} fetched in {} does not exist", className, classLoader, e); - } - - return null; - } - - /** - * - * @param classLoader target class loader - * @param classname class name to fetch - * @return true if exists - * @throws IllegalArgumentException if an invalid parameter has been passed in - */ - public static boolean isClass(ClassLoader classLoader, String classname) { - return fetchClass(classLoader, classname) != null; - } - - /** - * is a subclass? - * @param parent superclass - * @param presumedSubclass subclass - * @return - */ - public static boolean isSubclass(Class<?> parent, Class<?> presumedSubclass) { - return parent.isAssignableFrom(presumedSubclass); - } + protected static final Logger logger = LoggerFactory.getLogger(ReflectionUtil.class); + + private ReflectionUtil(){ + } + + /** + * returns (if exists) a class fetched from a given classloader. + * + * @param classLoader the class loader + * @param className the class name + * @return the actual class + * @throws IllegalArgumentException if an invalid parameter has been passed in + */ + public static Class<?> fetchClass(ClassLoader classLoader, + String className) { + if (classLoader == null) { + throw new IllegalArgumentException("A class loader must be provided"); + } + + if (className == null) { + throw new IllegalArgumentException("A class name to be fetched in class loader " + + classLoader + " must be provided"); + } + + try { + return Class.forName(className, true, classLoader); + } catch (Exception e) { + logger.error("class {} fetched in {} does not exist", className, classLoader, e); + } + + return null; + } + + /** + * Is class. + * + * @param classLoader target class loader + * @param classname class name to fetch + * @return true if exists + * @throws IllegalArgumentException if an invalid parameter has been passed in + */ + public static boolean isClass(ClassLoader classLoader, String classname) { + return fetchClass(classLoader, classname) != null; + } + + /** + * Is it a sub class. + * + * @param parent superclass + * @param presumedSubclass subclass + * @return + */ + public static boolean isSubclass(Class<?> parent, Class<?> presumedSubclass) { + return parent.isAssignableFrom(presumedSubclass); + } } |