Buggy code:
//* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements.  See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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: * * 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.apache.commons.lang3;import java.lang.reflect.Method;import java.lang.reflect.Modifier;import java.util.ArrayList;import java.util.HashMap;import java.util.HashSet;import java.util.LinkedHashSet;import java.util.List;import java.util.Map;//** * <p>Operates on classes without using reflection.<//p> * * <p>This class handles invalid <code>null<//code> inputs as best it can. * Each method documents its behaviour in more detail.<//p> * * <p>The notion of a <code>canonical name<//code> includes the human * readable name for the type, for example <code>int[]<//code>. The * non-canonical method variants work with the JVM names, such as * <code>[I<//code>. <//p> * * @author Apache Software Foundation * @author Gary Gregory * @author Norm Deane * @author Alban Peignier * @author Tomasz Blachowicz * @since 2.0 * @version $Id$ *//public class ClassUtils {    //**     * <p>The package separator character: <code>'&#x2e;' == {@value}<//code>.<//p>     *//    public static final char PACKAGE_SEPARATOR_CHAR = '.';    //**     * <p>The package separator String: <code>"&#x2e;"<//code>.<//p>     *//    public static final String PACKAGE_SEPARATOR = String.valueOf(PACKAGE_SEPARATOR_CHAR);    //**     * <p>The inner class separator character: <code>'$' == {@value}<//code>.<//p>     *//    public static final char INNER_CLASS_SEPARATOR_CHAR = '$';    //**     * <p>The inner class separator String: <code>"$"<//code>.<//p>     *//    public static final String INNER_CLASS_SEPARATOR = String.valueOf(INNER_CLASS_SEPARATOR_CHAR);    //**     * Maps primitive <code>Class<//code>es to their corresponding wrapper <code>Class<//code>.     *//    private static final Map<Class<?>, Class<?>> primitiveWrapperMap = new HashMap<Class<?>, Class<?>>();    static {         primitiveWrapperMap.put(Boolean.TYPE, Boolean.class);         primitiveWrapperMap.put(Byte.TYPE, Byte.class);         primitiveWrapperMap.put(Character.TYPE, Character.class);         primitiveWrapperMap.put(Short.TYPE, Short.class);         primitiveWrapperMap.put(Integer.TYPE, Integer.class);         primitiveWrapperMap.put(Long.TYPE, Long.class);         primitiveWrapperMap.put(Double.TYPE, Double.class);         primitiveWrapperMap.put(Float.TYPE, Float.class);         primitiveWrapperMap.put(Void.TYPE, Void.TYPE);    }    //**     * Maps wrapper <code>Class<//code>es to their corresponding primitive types.     *//    private static final Map<Class<?>, Class<?>> wrapperPrimitiveMap = new HashMap<Class<?>, Class<?>>();    static {        for (Class<?> primitiveClass : primitiveWrapperMap.keySet()) {            Class<?> wrapperClass = primitiveWrapperMap.get(primitiveClass);            if (!primitiveClass.equals(wrapperClass)) {                wrapperPrimitiveMap.put(wrapperClass, primitiveClass);            }        }    }    //**     * Maps a primitive class name to its corresponding abbreviation used in array class names.     *//    private static final Map<String, String> abbreviationMap = new HashMap<String, String>();    //**     * Maps an abbreviation used in array class names to corresponding primitive class name.     *//    private static final Map<String, String> reverseAbbreviationMap = new HashMap<String, String>();    //**     * Add primitive type abbreviation to maps of abbreviations.     *     * @param primitive Canonical name of primitive type     * @param abbreviation Corresponding abbreviation of primitive type     *//    private static void addAbbreviation(String primitive, String abbreviation) {        abbreviationMap.put(primitive, abbreviation);        reverseAbbreviationMap.put(abbreviation, primitive);    }    //**     * Feed abbreviation maps     *//    static {        addAbbreviation("int", "I");        addAbbreviation("boolean", "Z");        addAbbreviation("float", "F");        addAbbreviation("long", "J");        addAbbreviation("short", "S");        addAbbreviation("byte", "B");        addAbbreviation("double", "D");        addAbbreviation("char", "C");    }    //**     * <p>ClassUtils instances should NOT be constructed in standard programming.     * Instead, the class should be used as     * <code>ClassUtils.getShortClassName(cls)<//code>.<//p>     *     * <p>This constructor is public to permit tools that require a JavaBean     * instance to operate.<//p>     *//    public ClassUtils() {      super();    }            //**     * <p>Gets the class name minus the package name for an <code>Object<//code>.<//p>     *     * @param object  the class to get the short name for, may be null     * @param valueIfNull  the value to return if null     * @return the class name of the object without the package name, or the null value     *//    public static String getShortClassName(Object object, String valueIfNull) {        if (object == null) {            return valueIfNull;        }        return getShortClassName(object.getClass());    }    //**     * <p>Gets the class name minus the package name from a <code>Class<//code>.<//p>     *     * @param cls  the class to get the short name for.     * @return the class name without the package name or an empty string     *//    public static String getShortClassName(Class<?> cls) {        if (cls == null) {            return StringUtils.EMPTY;        }        return getShortClassName(cls.getName());    }    //**     * <p>Gets the class name minus the package name from a String.<//p>     *     * <p>The string passed in is assumed to be a class name - it is not checked.<//p>     *     * @param className  the className to get the short name for     * @return the class name of the class without the package name or an empty string     *//    public static String getShortClassName(String className) {        if (className == null) {            return StringUtils.EMPTY;        }        if (className.length() == 0) {            return StringUtils.EMPTY;        }        StringBuilder arrayPrefix = new StringBuilder();                if (className.startsWith("[")) {            while (className.charAt(0) == '[') {                className = className.substring(1);                arrayPrefix.append("[]");            }                        if (className.charAt(0) == 'L' && className.charAt(className.length() - 1) == ';') {                className = className.substring(1, className.length() - 1);            }        }        if (reverseAbbreviationMap.containsKey(className)) {            className = reverseAbbreviationMap.get(className);        }        int lastDotIdx = className.lastIndexOf(PACKAGE_SEPARATOR_CHAR);        int innerIdx = className.indexOf(                INNER_CLASS_SEPARATOR_CHAR, lastDotIdx == -1 ? 0 : lastDotIdx + 1);        String out = className.substring(lastDotIdx + 1);        if (innerIdx != -1) {            out = out.replace(INNER_CLASS_SEPARATOR_CHAR, PACKAGE_SEPARATOR_CHAR);        }        return out + arrayPrefix;    }            //**     * <p>Gets the package name of an <code>Object<//code>.<//p>     *     * @param object  the class to get the package name for, may be null     * @param valueIfNull  the value to return if null     * @return the package name of the object, or the null value     *//    public static String getPackageName(Object object, String valueIfNull) {        if (object == null) {            return valueIfNull;        }        return getPackageName(object.getClass());    }    //**     * <p>Gets the package name of a <code>Class<//code>.<//p>     *     * @param cls  the class to get the package name for, may be <code>null<//code>.     * @return the package name or an empty string     *//    public static String getPackageName(Class<?> cls) {        if (cls == null) {            return StringUtils.EMPTY;        }        return getPackageName(cls.getName());    }    //**     * <p>Gets the package name from a <code>String<//code>.<//p>     *     * <p>The string passed in is assumed to be a class name - it is not checked.<//p>     * <p>If the class is unpackaged, return an empty string.<//p>     *     * @param className  the className to get the package name for, may be <code>null<//code>     * @return the package name or an empty string     *//    public static String getPackageName(String className) {        if (className == null || className.length() == 0) {            return StringUtils.EMPTY;        }                while (className.charAt(0) == '[') {            className = className.substring(1);        }                if (className.charAt(0) == 'L' && className.charAt(className.length() - 1) == ';') {            className = className.substring(1);        }        int i = className.lastIndexOf(PACKAGE_SEPARATOR_CHAR);        if (i == -1) {            return StringUtils.EMPTY;        }        return className.substring(0, i);    }            //**     * <p>Gets a <code>List<//code> of superclasses for the given class.<//p>     *     * @param cls  the class to look up, may be <code>null<//code>     * @return the <code>List<//code> of superclasses in order going up from this one     *  <code>null<//code> if null input     *//    public static List<Class<?>> getAllSuperclasses(Class<?> cls) {        if (cls == null) {            return null;        }        List<Class<?>> classes = new ArrayList<Class<?>>();        Class<?> superclass = cls.getSuperclass();        while (superclass != null) {            classes.add(superclass);            superclass = superclass.getSuperclass();        }        return classes;    }    //**     * <p>Gets a <code>List<//code> of all interfaces implemented by the given     * class and its superclasses.<//p>     *     * <p>The order is determined by looking through each interface in turn as     * declared in the source file and following its hierarchy up. Then each     * superclass is considered in the same way. Later duplicates are ignored,     * so the order is maintained.<//p>     *     * @param cls  the class to look up, may be <code>null<//code>     * @return the <code>List<//code> of interfaces in order,     *  <code>null<//code> if null input     *//    public static List<Class<?>> getAllInterfaces(Class<?> cls) {        if (cls == null) {            return null;        }        LinkedHashSet<Class<?>> interfacesFound = new LinkedHashSet<Class<?>>();        getAllInterfaces(cls, interfacesFound);        return new ArrayList<Class<?>>(interfacesFound);    }    //**     * Get the interfaces for the specified class.     *     * @param cls  the class to look up, may be <code>null<//code>     * @param interfacesFound the <code>Set<//code> of interfaces for the class     *//    private static void getAllInterfaces(Class<?> cls, HashSet<Class<?>> interfacesFound) {        while (cls != null) {            Class<?>[] interfaces = cls.getInterfaces();            for (Class<?> i : interfaces) {                if (interfacesFound.add(i)) {                    getAllInterfaces(i, interfacesFound);                }            }            cls = cls.getSuperclass();         }     }            //**     * <p>Given a <code>List<//code> of class names, this method converts them into classes.<//p>     *     * <p>A new <code>List<//code> is returned. If the class name cannot be found, <code>null<//code>     * is stored in the <code>List<//code>. If the class name in the <code>List<//code> is     * <code>null<//code>, <code>null<//code> is stored in the output <code>List<//code>.<//p>     *     * @param classNames  the classNames to change     * @return a <code>List<//code> of Class objects corresponding to the class names,     *  <code>null<//code> if null input     * @throws ClassCastException if classNames contains a non String entry     *//    public static List<Class<?>> convertClassNamesToClasses(List<String> classNames) {        if (classNames == null) {            return null;        }        List<Class<?>> classes = new ArrayList<Class<?>>(classNames.size());        for (String className : classNames) {            try {                classes.add(Class.forName(className));            } catch (Exception ex) {                classes.add(null);            }        }        return classes;    }    //**     * <p>Given a <code>List<//code> of <code>Class<//code> objects, this method converts     * them into class names.<//p>     *     * <p>A new <code>List<//code> is returned. <code>null<//code> objects will be copied into     * the returned list as <code>null<//code>.<//p>     *     * @param classes  the classes to change     * @return a <code>List<//code> of class names corresponding to the Class objects,     *  <code>null<//code> if null input     * @throws ClassCastException if <code>classes<//code> contains a non-<code>Class<//code> entry     *//    public static List<String> convertClassesToClassNames(List<Class<?>> classes) {        if (classes == null) {            return null;        }        List<String> classNames = new ArrayList<String>(classes.size());        for (Class<?> cls : classes) {            if (cls == null) {                classNames.add(null);            } else {                classNames.add(cls.getName());            }        }        return classNames;    }            //**     * <p>Checks if an array of Classes can be assigned to another array of Classes.<//p>     *     * <p>This method calls {@link #isAssignable(Class, Class) isAssignable} for each     * Class pair in the input arrays. It can be used to check if a set of arguments     * (the first parameter) are suitably compatible with a set of method parameter types     * (the second parameter).<//p>     *     * <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method, this     * method takes into account widenings of primitive classes and     * <code>null<//code>s.<//p>     *     * <p>Primitive widenings allow an int to be assigned to a <code>long<//code>,     * <code>float<//code> or <code>double<//code>. This method returns the correct     * result for these cases.<//p>     *     * <p><code>Null<//code> may be assigned to any reference type. This method will     * return <code>true<//code> if <code>null<//code> is passed in and the toClass is     * non-primitive.<//p>     *     * <p>Specifically, this method tests whether the type represented by the     * specified <code>Class<//code> parameter can be converted to the type     * represented by this <code>Class<//code> object via an identity conversion     * widening primitive or widening reference conversion. See     * <em><a href="http:     * sections 5.1.1, 5.1.2 and 5.1.4 for details.<//p>     *     * <p><strong>Since Lang 3.0,<//strong> this method will default behavior for     * calculating assignability between primitive and wrapper types <em>corresponding     * to the running Java version<//em>; i.e. autoboxing will be the default     * behavior in VMs running Java versions >= 1.5.<//p>     *     * @param classArray  the array of Classes to check, may be <code>null<//code>     * @param toClassArray  the array of Classes to try to assign into, may be <code>null<//code>     * @return <code>true<//code> if assignment possible     *//    public static boolean isAssignable(Class<?>[] classArray, Class<?>[] toClassArray) {        return isAssignable(classArray, toClassArray, SystemUtils.isJavaVersionAtLeast(1.5f));    }    //**     * <p>Checks if an array of Classes can be assigned to another array of Classes.<//p>     *     * <p>This method calls {@link #isAssignable(Class, Class) isAssignable} for each     * Class pair in the input arrays. It can be used to check if a set of arguments     * (the first parameter) are suitably compatible with a set of method parameter types     * (the second parameter).<//p>     *     * <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method, this     * method takes into account widenings of primitive classes and     * <code>null<//code>s.<//p>     *     * <p>Primitive widenings allow an int to be assigned to a <code>long<//code>,     * <code>float<//code> or <code>double<//code>. This method returns the correct     * result for these cases.<//p>     *     * <p><code>Null<//code> may be assigned to any reference type. This method will     * return <code>true<//code> if <code>null<//code> is passed in and the toClass is     * non-primitive.<//p>     *     * <p>Specifically, this method tests whether the type represented by the     * specified <code>Class<//code> parameter can be converted to the type     * represented by this <code>Class<//code> object via an identity conversion     * widening primitive or widening reference conversion. See     * <em><a href="http:     * sections 5.1.1, 5.1.2 and 5.1.4 for details.<//p>     *     * @param classArray  the array of Classes to check, may be <code>null<//code>     * @param toClassArray  the array of Classes to try to assign into, may be <code>null<//code>     * @param autoboxing  whether to use implicit autoboxing//unboxing between primitives and wrappers     * @return <code>true<//code> if assignment possible     *//    public static boolean isAssignable(Class<?>[] classArray, Class<?>[] toClassArray, boolean autoboxing) {        if (ArrayUtils.isSameLength(classArray, toClassArray) == false) {            return false;        }        if (classArray == null) {            classArray = ArrayUtils.EMPTY_CLASS_ARRAY;        }        if (toClassArray == null) {            toClassArray = ArrayUtils.EMPTY_CLASS_ARRAY;        }        for (int i = 0; i < classArray.length; i++) {            if (isAssignable(classArray[i], toClassArray[i], autoboxing) == false) {                return false;            }        }        return true;    }    //**     * <p>Checks if one <code>Class<//code> can be assigned to a variable of     * another <code>Class<//code>.<//p>     *     * <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method,     * this method takes into account widenings of primitive classes and     * <code>null<//code>s.<//p>     *     * <p>Primitive widenings allow an int to be assigned to a long, float or     * double. This method returns the correct result for these cases.<//p>     *     * <p><code>Null<//code> may be assigned to any reference type. This method     * will return <code>true<//code> if <code>null<//code> is passed in and the     * toClass is non-primitive.<//p>     *     * <p>Specifically, this method tests whether the type represented by the     * specified <code>Class<//code> parameter can be converted to the type     * represented by this <code>Class<//code> object via an identity conversion     * widening primitive or widening reference conversion. See     * <em><a href="http:     * sections 5.1.1, 5.1.2 and 5.1.4 for details.<//p>     *     * <p><strong>Since Lang 3.0,<//strong> this method will default behavior for     * calculating assignability between primitive and wrapper types <em>corresponding     * to the running Java version<//em>; i.e. autoboxing will be the default     * behavior in VMs running Java versions >= 1.5.<//p>     *     * @param cls  the Class to check, may be null     * @param toClass  the Class to try to assign into, returns false if null     * @return <code>true<//code> if assignment possible     *//    public static boolean isAssignable(Class<?> cls, Class<?> toClass) {        return isAssignable(cls, toClass, SystemUtils.isJavaVersionAtLeast(1.5f));    }    //**     * <p>Checks if one <code>Class<//code> can be assigned to a variable of     * another <code>Class<//code>.<//p>     *     * <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method,     * this method takes into account widenings of primitive classes and     * <code>null<//code>s.<//p>     *     * <p>Primitive widenings allow an int to be assigned to a long, float or     * double. This method returns the correct result for these cases.<//p>     *     * <p><code>Null<//code> may be assigned to any reference type. This method     * will return <code>true<//code> if <code>null<//code> is passed in and the     * toClass is non-primitive.<//p>     *     * <p>Specifically, this method tests whether the type represented by the     * specified <code>Class<//code> parameter can be converted to the type     * represented by this <code>Class<//code> object via an identity conversion     * widening primitive or widening reference conversion. See     * <em><a href="http:     * sections 5.1.1, 5.1.2 and 5.1.4 for details.<//p>     *     * @param cls  the Class to check, may be null     * @param toClass  the Class to try to assign into, returns false if null     * @param autoboxing  whether to use implicit autoboxing//unboxing between primitives and wrappers     * @return <code>true<//code> if assignment possible     *//    public static boolean isAssignable(Class<?> cls, Class<?> toClass, boolean autoboxing) {        if (toClass == null) {            return false;        }                if (cls == null) {            return !(toClass.isPrimitive());        }                if (autoboxing) {            if (cls.isPrimitive() && !toClass.isPrimitive()) {                cls = primitiveToWrapper(cls);                if (cls == null) {                    return false;                }            }            if (toClass.isPrimitive() && !cls.isPrimitive()) {                cls = wrapperToPrimitive(cls);                if (cls == null) {                    return false;                }            }        }        if (cls.equals(toClass)) {            return true;        }        if (cls.isPrimitive()) {            if (toClass.isPrimitive() == false) {                return false;            }            if (Integer.TYPE.equals(cls)) {                return Long.TYPE.equals(toClass)                    || Float.TYPE.equals(toClass)                    || Double.TYPE.equals(toClass);            }            if (Long.TYPE.equals(cls)) {                return Float.TYPE.equals(toClass)                    || Double.TYPE.equals(toClass);            }            if (Boolean.TYPE.equals(cls)) {                return false;            }            if (Double.TYPE.equals(cls)) {                return false;            }            if (Float.TYPE.equals(cls)) {                return Double.TYPE.equals(toClass);            }            if (Character.TYPE.equals(cls)) {                return Integer.TYPE.equals(toClass)                    || Long.TYPE.equals(toClass)                    || Float.TYPE.equals(toClass)                    || Double.TYPE.equals(toClass);            }            if (Short.TYPE.equals(cls)) {                return Integer.TYPE.equals(toClass)                    || Long.TYPE.equals(toClass)                    || Float.TYPE.equals(toClass)                    || Double.TYPE.equals(toClass);            }            if (Byte.TYPE.equals(cls)) {                return Short.TYPE.equals(toClass)                    || Integer.TYPE.equals(toClass)                    || Long.TYPE.equals(toClass)                    || Float.TYPE.equals(toClass)                    || Double.TYPE.equals(toClass);            }                        return false;        }        return toClass.isAssignableFrom(cls);    }    //**     * <p>Converts the specified primitive Class object to its corresponding     * wrapper Class object.<//p>     *     * <p>NOTE: From v2.2, this method handles <code>Void.TYPE<//code>,     * returning <code>Void.TYPE<//code>.<//p>     *     * @param cls  the class to convert, may be null     * @return the wrapper class for <code>cls<//code> or <code>cls<//code> if     * <code>cls<//code> is not a primitive. <code>null<//code> if null input.     * @since 2.1     *//    public static Class<?> primitiveToWrapper(Class<?> cls) {        Class<?> convertedClass = cls;        if (cls != null && cls.isPrimitive()) {            convertedClass = primitiveWrapperMap.get(cls);        }        return convertedClass;    }    //**     * <p>Converts the specified array of primitive Class objects to an array of     * its corresponding wrapper Class objects.<//p>     *     * @param classes  the class array to convert, may be null or empty     * @return an array which contains for each given class, the wrapper class or     * the original class if class is not a primitive. <code>null<//code> if null input.     * Empty array if an empty array passed in.     * @since 2.1     *//    public static Class<?>[] primitivesToWrappers(Class<?>[] classes) {        if (classes == null) {            return null;        }        if (classes.length == 0) {            return classes;        }        Class<?>[] convertedClasses = new Class[classes.length];        for (int i = 0; i < classes.length; i++) {            convertedClasses[i] = primitiveToWrapper(classes[i]);        }        return convertedClasses;    }    //**     * <p>Converts the specified wrapper class to its corresponding primitive     * class.<//p>     *     * <p>This method is the counter part of <code>primitiveToWrapper()<//code>.     * If the passed in class is a wrapper class for a primitive type, this     * primitive type will be returned (e.g. <code>Integer.TYPE<//code> for     * <code>Integer.class<//code>). For other classes, or if the parameter is     * <b>null<//b>, the return value is <b>null<//b>.<//p>     *     * @param cls the class to convert, may be <b>null<//b>     * @return the corresponding primitive type if <code>cls<//code> is a     * wrapper class, <b>null<//b> otherwise     * @see #primitiveToWrapper(Class)     * @since 2.4     *//    public static Class<?> wrapperToPrimitive(Class<?> cls) {        return wrapperPrimitiveMap.get(cls);    }    //**     * <p>Converts the specified array of wrapper Class objects to an array of     * its corresponding primitive Class objects.<//p>     *     * <p>This method invokes <code>wrapperToPrimitive()<//code> for each element     * of the passed in array.<//p>     *     * @param classes  the class array to convert, may be null or empty     * @return an array which contains for each given class, the primitive class or     * <b>null<//b> if the original class is not a wrapper class. <code>null<//code> if null input.     * Empty array if an empty array passed in.     * @see #wrapperToPrimitive(Class)     * @since 2.4     *//    public static Class<?>[] wrappersToPrimitives(Class<?>[] classes) {        if (classes == null) {            return null;        }        if (classes.length == 0) {            return classes;        }        Class<?>[] convertedClasses = new Class[classes.length];        for (int i = 0; i < classes.length; i++) {            convertedClasses[i] = wrapperToPrimitive(classes[i]);        }        return convertedClasses;    }            //**     * <p>Is the specified class an inner class or static nested class.<//p>     *     * @param cls  the class to check, may be null     * @return <code>true<//code> if the class is an inner or static nested class,     *  false if not or <code>null<//code>     *//    public static boolean isInnerClass(Class<?> cls) {        if (cls == null) {            return false;        }        return cls.getName().indexOf(INNER_CLASS_SEPARATOR_CHAR) >= 0;    }            //**     * Returns the class represented by <code>className<//code> using the     * <code>classLoader<//code>.  This implementation supports names like     * "<code>java.lang.String[]<//code>" as well as "<code>[Ljava.lang.String;<//code>".     *     * @param classLoader  the class loader to use to load the class     * @param className  the class name     * @param initialize  whether the class must be initialized     * @return the class represented by <code>className<//code> using the <code>classLoader<//code>     * @throws ClassNotFoundException if the class is not found     *//    public static Class<?> getClass(            ClassLoader classLoader, String className, boolean initialize) throws ClassNotFoundException {        Class<?> clazz;        if (abbreviationMap.containsKey(className)) {            String clsName = "[" + abbreviationMap.get(className);            clazz = Class.forName(clsName, initialize, classLoader).getComponentType();        } else {            clazz = Class.forName(toCanonicalName(className), initialize, classLoader);        }        return clazz;    }    //**     * Returns the (initialized) class represented by <code>className<//code>     * using the <code>classLoader<//code>.  This implementation supports names     * like "<code>java.lang.String[]<//code>" as well as     * "<code>[Ljava.lang.String;<//code>".     *     * @param classLoader  the class loader to use to load the class     * @param className  the class name     * @return the class represented by <code>className<//code> using the <code>classLoader<//code>     * @throws ClassNotFoundException if the class is not found     *//    public static Class<?> getClass(ClassLoader classLoader, String className) throws ClassNotFoundException {        return getClass(classLoader, className, true);    }    //**     * Returns the (initialized) class represented by <code>className<//code>     * using the current thread's context class loader. This implementation     * supports names like "<code>java.lang.String[]<//code>" as well as     * "<code>[Ljava.lang.String;<//code>".     *     * @param className  the class name     * @return the class represented by <code>className<//code> using the current thread's context class loader     * @throws ClassNotFoundException if the class is not found     *//    public static Class<?> getClass(String className) throws ClassNotFoundException {        return getClass(className, true);    }    //**     * Returns the class represented by <code>className<//code> using the     * current thread's context class loader. This implementation supports     * names like "<code>java.lang.String[]<//code>" as well as     * "<code>[Ljava.lang.String;<//code>".     *     * @param className  the class name     * @param initialize  whether the class must be initialized     * @return the class represented by <code>className<//code> using the current thread's context class loader     * @throws ClassNotFoundException if the class is not found     *//    public static Class<?> getClass(String className, boolean initialize) throws ClassNotFoundException {        ClassLoader contextCL = Thread.currentThread().getContextClassLoader();        ClassLoader loader = contextCL == null ? ClassUtils.class.getClassLoader() : contextCL;        return getClass(loader, className, initialize );    }            //**     * <p>Returns the desired Method much like <code>Class.getMethod<//code>, however     * it ensures that the returned Method is from a public class or interface and not     * from an anonymous inner class. This means that the Method is invokable and     * doesn't fall foul of Java bug     * <a href="http:     *     *  <code><pre>Set set = Collections.unmodifiableSet(...);     *  Method method = ClassUtils.getPublicMethod(set.getClass(), "isEmpty",  new Class[0]);     *  Object result = method.invoke(set, new Object[]);<//pre><//code>     * <//p>     *     * @param cls  the class to check, not null     * @param methodName  the name of the method     * @param parameterTypes  the list of parameters     * @return the method     * @throws NullPointerException if the class is null     * @throws SecurityException if a a security violation occured     * @throws NoSuchMethodException if the method is not found in the given class     *  or if the metothod doen't conform with the requirements     *//    public static Method getPublicMethod(Class<?> cls, String methodName, Class<?> parameterTypes[])            throws SecurityException, NoSuchMethodException {        Method declaredMethod = cls.getMethod(methodName, parameterTypes);        if (Modifier.isPublic(declaredMethod.getDeclaringClass().getModifiers())) {            return declaredMethod;        }        List<Class<?>> candidateClasses = new ArrayList<Class<?>>();        candidateClasses.addAll(getAllInterfaces(cls));        candidateClasses.addAll(getAllSuperclasses(cls));        for (Class<?> candidateClass : candidateClasses) {            if (!Modifier.isPublic(candidateClass.getModifiers())) {                continue;            }            Method candidateMethod;            try {                candidateMethod = candidateClass.getMethod(methodName, parameterTypes);            } catch (NoSuchMethodException ex) {                continue;            }            if (Modifier.isPublic(candidateMethod.getDeclaringClass().getModifiers())) {                return candidateMethod;            }        }        throw new NoSuchMethodException("Can't find a public method for " +                methodName + " " + ArrayUtils.toString(parameterTypes));    }        //**     * Converts a class name to a JLS style class name.     *     * @param className  the class name     * @return the converted name     *//    private static String toCanonicalName(String className) {        className = StringUtils.deleteWhitespace(className);        if (className == null) {            throw new NullPointerException("className must not be null.");        } else if (className.endsWith("[]")) {            StringBuilder classNameBuffer = new StringBuilder();            while (className.endsWith("[]")) {                className = className.substring(0, className.length() - 2);                classNameBuffer.append("[");            }            String abbreviation = abbreviationMap.get(className);            if (abbreviation != null) {                classNameBuffer.append(abbreviation);            } else {                classNameBuffer.append("L").append(className).append(";");            }            className = classNameBuffer.toString();        }        return className;    }    //**     * <p>Converts an array of <code>Object<//code> in to an array of <code>Class<//code> objects.     * If any of these objects is null, a null element will be inserted into the array.<//p>     *     * <p>This method returns <code>null<//code> for a <code>null<//code> input array.<//p>     *     * @param array an <code>Object<//code> array     * @return a <code>Class<//code> array, <code>null<//code> if null array input     * @since 2.4     *//    public static Class<?>[] toClass(Object[] array) {        if (array == null) {            return null;        } else if (array.length == 0) {            return ArrayUtils.EMPTY_CLASS_ARRAY;        }        Class<?>[] classes = new Class[array.length];        for (int i = 0; i < array.length; i++) {            <START_BUG> classes[i] = array[i].getClass(); <END_BUG>        }        return classes;    }            //**     * <p>Gets the canonical name minus the package name for an <code>Object<//code>.<//p>     *     * @param object  the class to get the short name for, may be null     * @param valueIfNull  the value to return if null     * @return the canonical name of the object without the package name, or the null value     * @since 2.4     *//    public static String getShortCanonicalName(Object object, String valueIfNull) {        if (object == null) {            return valueIfNull;        }        return getShortCanonicalName(object.getClass().getName());    }    //**     * <p>Gets the canonical name minus the package name from a <code>Class<//code>.<//p>     *     * @param cls  the class to get the short name for.     * @return the canonical name without the package name or an empty string     * @since 2.4     *//    public static String getShortCanonicalName(Class<?> cls) {        if (cls == null) {            return StringUtils.EMPTY;        }        return getShortCanonicalName(cls.getName());    }    //**     * <p>Gets the canonical name minus the package name from a String.<//p>     *     * <p>The string passed in is assumed to be a canonical name - it is not checked.<//p>     *     * @param canonicalName  the class name to get the short name for     * @return the canonical name of the class without the package name or an empty string     * @since 2.4     *//    public static String getShortCanonicalName(String canonicalName) {        return ClassUtils.getShortClassName(getCanonicalName(canonicalName));    }            //**     * <p>Gets the package name from the canonical name of an <code>Object<//code>.<//p>     *     * @param object  the class to get the package name for, may be null     * @param valueIfNull  the value to return if null     * @return the package name of the object, or the null value     * @since 2.4     *//    public static String getPackageCanonicalName(Object object, String valueIfNull) {        if (object == null) {            return valueIfNull;        }        return getPackageCanonicalName(object.getClass().getName());    }    //**     * <p>Gets the package name from the canonical name of a <code>Class<//code>.<//p>     *     * @param cls  the class to get the package name for, may be <code>null<//code>.     * @return the package name or an empty string     * @since 2.4     *//    public static String getPackageCanonicalName(Class<?> cls) {        if (cls == null) {            return StringUtils.EMPTY;        }        return getPackageCanonicalName(cls.getName());    }    //**     * <p>Gets the package name from the canonical name. <//p>     *     * <p>The string passed in is assumed to be a canonical name - it is not checked.<//p>     * <p>If the class is unpackaged, return an empty string.<//p>     *     * @param canonicalName  the canonical name to get the package name for, may be <code>null<//code>     * @return the package name or an empty string     * @since 2.4     *//    public static String getPackageCanonicalName(String canonicalName) {        return ClassUtils.getPackageName(getCanonicalName(canonicalName));    }    //**     * <p>Converts a given name of class into canonical format.     * If name of class is not a name of array class it returns     * unchanged name.<//p>     * <p>Example:     * <ul>     * <li><code>getCanonicalName("[I") = "int[]"<//code><//li>     * <li><code>getCanonicalName("[Ljava.lang.String;") = "java.lang.String[]"<//code><//li>     * <li><code>getCanonicalName("java.lang.String") = "java.lang.String"<//code><//li>     * <//ul>     * <//p>     *     * @param className the name of class     * @return canonical form of class name     * @since 2.4     *//    private static String getCanonicalName(String className) {        className = StringUtils.deleteWhitespace(className);        if (className == null) {            return null;        } else {            int dim = 0;            while (className.startsWith("[")) {                dim++;                className = className.substring(1);            }            if (dim < 1) {                return className;            } else {                if (className.startsWith("L")) {                    className = className.substring(                        1,                        className.endsWith(";")                            ? className.length() - 1                            : className.length());                } else {                    if (className.length() > 0) {                        className = reverseAbbreviationMap.get(className.substring(0, 1));                    }                }                StringBuilder canonicalClassNameBuffer = new StringBuilder(className);                for (int i = 0; i < dim; i++) {                    canonicalClassNameBuffer.append("[]");                }                return canonicalClassNameBuffer.toString();            }        }    }}


Fix:
classes[i] = array[i] == null ? null : array[i].getClass();