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org.apache.catalina.core.DefaultInstanceManager Maven / Gradle / Ivy
/*
* 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://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.apache.catalina.core;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;
import javax.ejb.EJB;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceUnit;
import javax.xml.ws.WebServiceRef;
import org.apache.catalina.ContainerServlet;
import org.apache.catalina.Globals;
import org.apache.catalina.security.SecurityUtil;
import org.apache.catalina.util.Introspection;
import org.apache.juli.logging.Log;
import org.apache.tomcat.InstanceManager;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.collections.ManagedConcurrentWeakHashMap;
import org.apache.tomcat.util.res.StringManager;
public class DefaultInstanceManager implements InstanceManager {
// Used when there are no annotations in a class
private static final AnnotationCacheEntry[] ANNOTATIONS_EMPTY
= new AnnotationCacheEntry[0];
/**
* The string manager for this package.
*/
protected static final StringManager sm = StringManager.getManager(DefaultInstanceManager.class);
private static final boolean EJB_PRESENT;
private static final boolean JPA_PRESENT;
private static final boolean WS_PRESENT;
static {
Class clazz = null;
try {
clazz = Class.forName("javax.ejb.EJB");
} catch (ClassNotFoundException cnfe) {
// Expected
}
EJB_PRESENT = (clazz != null);
clazz = null;
try {
clazz = Class.forName("javax.persistence.PersistenceContext");
} catch (ClassNotFoundException cnfe) {
// Expected
}
JPA_PRESENT = (clazz != null);
clazz = null;
try {
clazz = Class.forName("javax.xml.ws.WebServiceRef");
} catch (ClassNotFoundException cnfe) {
// Expected
}
WS_PRESENT = (clazz != null);
}
private final Context context;
private final Map> injectionMap;
protected final ClassLoader classLoader;
protected final ClassLoader containerClassLoader;
protected final boolean privileged;
protected final boolean ignoreAnnotations;
private final Set restrictedClasses;
private final ManagedConcurrentWeakHashMap, AnnotationCacheEntry[]> annotationCache =
new ManagedConcurrentWeakHashMap<>();
private final Map postConstructMethods;
private final Map preDestroyMethods;
public DefaultInstanceManager(Context context,
Map> injectionMap,
org.apache.catalina.Context catalinaContext,
ClassLoader containerClassLoader) {
classLoader = catalinaContext.getLoader().getClassLoader();
privileged = catalinaContext.getPrivileged();
this.containerClassLoader = containerClassLoader;
ignoreAnnotations = catalinaContext.getIgnoreAnnotations();
Log log = catalinaContext.getLogger();
Set classNames = new HashSet<>();
loadProperties(classNames,
"org/apache/catalina/core/RestrictedServlets.properties",
"defaultInstanceManager.restrictedServletsResource", log);
loadProperties(classNames,
"org/apache/catalina/core/RestrictedListeners.properties",
"defaultInstanceManager.restrictedListenersResource", log);
loadProperties(classNames,
"org/apache/catalina/core/RestrictedFilters.properties",
"defaultInstanceManager.restrictedFiltersResource", log);
restrictedClasses = Collections.unmodifiableSet(classNames);
this.context = context;
this.injectionMap = injectionMap;
this.postConstructMethods = catalinaContext.findPostConstructMethods();
this.preDestroyMethods = catalinaContext.findPreDestroyMethods();
}
@Override
public Object newInstance(Class clazz) throws IllegalAccessException,
InvocationTargetException, NamingException, InstantiationException,
IllegalArgumentException, NoSuchMethodException, SecurityException {
return newInstance(clazz.getConstructor().newInstance(), clazz);
}
@Override
public Object newInstance(String className) throws IllegalAccessException,
InvocationTargetException, NamingException, InstantiationException,
ClassNotFoundException, IllegalArgumentException, NoSuchMethodException, SecurityException {
Class clazz = loadClassMaybePrivileged(className, classLoader);
return newInstance(clazz.getConstructor().newInstance(), clazz);
}
@Override
public Object newInstance(final String className, final ClassLoader classLoader)
throws IllegalAccessException, NamingException, InvocationTargetException,
InstantiationException, ClassNotFoundException, IllegalArgumentException,
NoSuchMethodException, SecurityException {
Class clazz = classLoader.loadClass(className);
return newInstance(clazz.getConstructor().newInstance(), clazz);
}
@Override
public void newInstance(Object o)
throws IllegalAccessException, InvocationTargetException, NamingException {
newInstance(o, o.getClass());
}
private Object newInstance(Object instance, Class clazz)
throws IllegalAccessException, InvocationTargetException, NamingException {
if (!ignoreAnnotations) {
Map injections = assembleInjectionsFromClassHierarchy(clazz);
populateAnnotationsCache(clazz, injections);
processAnnotations(instance, injections);
postConstruct(instance, clazz);
}
return instance;
}
private Map assembleInjectionsFromClassHierarchy(Class clazz) {
Map injections = new HashMap<>();
Map currentInjections = null;
while (clazz != null) {
currentInjections = this.injectionMap.get(clazz.getName());
if (currentInjections != null) {
injections.putAll(currentInjections);
}
clazz = clazz.getSuperclass();
}
return injections;
}
@Override
public void destroyInstance(Object instance) throws IllegalAccessException,
InvocationTargetException {
if (!ignoreAnnotations) {
preDestroy(instance, instance.getClass());
}
}
/**
* Call postConstruct method on the specified instance recursively from
* deepest superclass to actual class.
*
* @param instance object to call postconstruct methods on
* @param clazz (super) class to examine for postConstruct annotation.
* @throws IllegalAccessException if postConstruct method is inaccessible.
* @throws InvocationTargetException
* if call fails
*/
protected void postConstruct(Object instance, final Class clazz)
throws IllegalAccessException, InvocationTargetException {
if (context == null) {
// No resource injection
return;
}
Class superClass = clazz.getSuperclass();
if (superClass != Object.class) {
postConstruct(instance, superClass);
}
// At the end the postconstruct annotated
// method is invoked
AnnotationCacheEntry[] annotations = annotationCache.get(clazz);
for (AnnotationCacheEntry entry : annotations) {
if (entry.getType() == AnnotationCacheEntryType.POST_CONSTRUCT) {
// This will always return a new Method instance
// Making this instance accessible does not affect other instances
Method postConstruct = getMethod(clazz, entry);
postConstruct.setAccessible(true);
postConstruct.invoke(instance);
}
}
}
/**
* Call preDestroy method on the specified instance recursively from deepest
* superclass to actual class.
*
* @param instance object to call preDestroy methods on
* @param clazz (super) class to examine for preDestroy annotation.
* @throws IllegalAccessException if preDestroy method is inaccessible.
* @throws InvocationTargetException
* if call fails
*/
protected void preDestroy(Object instance, final Class clazz)
throws IllegalAccessException, InvocationTargetException {
Class superClass = clazz.getSuperclass();
if (superClass != Object.class) {
preDestroy(instance, superClass);
}
// At the end the postconstruct annotated
// method is invoked
AnnotationCacheEntry[] annotations = annotationCache.get(clazz);
if (annotations == null) {
// instance not created through the instance manager
return;
}
for (AnnotationCacheEntry entry : annotations) {
if (entry.getType() == AnnotationCacheEntryType.PRE_DESTROY) {
// This will always return a new Method instance
// Making this instance accessible does not affect other instances
Method preDestroy = getMethod(clazz, entry);
preDestroy.setAccessible(true);
preDestroy.invoke(instance);
}
}
}
@Override
public void backgroundProcess() {
annotationCache.maintain();
}
/**
* Make sure that the annotations cache has been populated for the provided
* class.
*
* @param clazz clazz to populate annotations for
* @param injections map of injections for this class from xml deployment
* descriptor
* @throws IllegalAccessException if injection target is inaccessible
* @throws NamingException if value cannot be looked up in jndi
* @throws InvocationTargetException
* if injection fails
*/
protected void populateAnnotationsCache(Class clazz,
Map injections) throws IllegalAccessException,
InvocationTargetException, NamingException {
List annotations = null;
Set injectionsMatchedToSetter = new HashSet<>();
while (clazz != null) {
AnnotationCacheEntry[] annotationsArray = annotationCache.get(clazz);
if (annotationsArray == null) {
if (annotations == null) {
annotations = new ArrayList<>();
} else {
annotations.clear();
}
// Initialize methods annotations
Method[] methods = Introspection.getDeclaredMethods(clazz);
Method postConstruct = null;
String postConstructFromXml = postConstructMethods.get(clazz.getName());
Method preDestroy = null;
String preDestroyFromXml = preDestroyMethods.get(clazz.getName());
for (Method method : methods) {
if (context != null) {
// Resource injection only if JNDI is enabled
if (injections != null && Introspection.isValidSetter(method)) {
String fieldName = Introspection.getPropertyName(method);
injectionsMatchedToSetter.add(fieldName);
if (injections.containsKey(fieldName)) {
annotations.add(new AnnotationCacheEntry(
method.getName(),
method.getParameterTypes(),
injections.get(fieldName),
AnnotationCacheEntryType.SETTER));
continue;
}
}
Resource resourceAnnotation;
Annotation ejbAnnotation;
Annotation webServiceRefAnnotation;
Annotation persistenceContextAnnotation;
Annotation persistenceUnitAnnotation;
if ((resourceAnnotation = method.getAnnotation(Resource.class)) != null) {
annotations.add(new AnnotationCacheEntry(
method.getName(),
method.getParameterTypes(),
resourceAnnotation.name(),
AnnotationCacheEntryType.SETTER));
} else if (EJB_PRESENT &&
(ejbAnnotation = method.getAnnotation(EJB.class)) != null) {
annotations.add(new AnnotationCacheEntry(
method.getName(),
method.getParameterTypes(),
((EJB) ejbAnnotation).name(),
AnnotationCacheEntryType.SETTER));
} else if (WS_PRESENT && (webServiceRefAnnotation =
method.getAnnotation(WebServiceRef.class)) != null) {
annotations.add(new AnnotationCacheEntry(
method.getName(),
method.getParameterTypes(),
((WebServiceRef) webServiceRefAnnotation).name(),
AnnotationCacheEntryType.SETTER));
} else if (JPA_PRESENT && (persistenceContextAnnotation =
method.getAnnotation(PersistenceContext.class)) != null) {
annotations.add(new AnnotationCacheEntry(
method.getName(),
method.getParameterTypes(),
((PersistenceContext) persistenceContextAnnotation).name(),
AnnotationCacheEntryType.SETTER));
} else if (JPA_PRESENT && (persistenceUnitAnnotation =
method.getAnnotation(PersistenceUnit.class)) != null) {
annotations.add(new AnnotationCacheEntry(
method.getName(),
method.getParameterTypes(),
((PersistenceUnit) persistenceUnitAnnotation).name(),
AnnotationCacheEntryType.SETTER));
}
}
postConstruct = findPostConstruct(postConstruct, postConstructFromXml, method);
preDestroy = findPreDestroy(preDestroy, preDestroyFromXml, method);
}
if (postConstruct != null) {
annotations.add(new AnnotationCacheEntry(
postConstruct.getName(),
postConstruct.getParameterTypes(), null,
AnnotationCacheEntryType.POST_CONSTRUCT));
} else if (postConstructFromXml != null) {
throw new IllegalArgumentException(sm.getString("defaultInstanceManager.postConstructNotFound",
postConstructFromXml, clazz.getName()));
}
if (preDestroy != null) {
annotations.add(new AnnotationCacheEntry(
preDestroy.getName(),
preDestroy.getParameterTypes(), null,
AnnotationCacheEntryType.PRE_DESTROY));
} else if (preDestroyFromXml != null) {
throw new IllegalArgumentException(sm.getString("defaultInstanceManager.preDestroyNotFound",
preDestroyFromXml, clazz.getName()));
}
if (context != null) {
// Initialize fields annotations for resource injection if
// JNDI is enabled
Field[] fields = Introspection.getDeclaredFields(clazz);
for (Field field : fields) {
Resource resourceAnnotation;
Annotation ejbAnnotation;
Annotation webServiceRefAnnotation;
Annotation persistenceContextAnnotation;
Annotation persistenceUnitAnnotation;
String fieldName = field.getName();
if (injections != null && injections.containsKey(fieldName) && !injectionsMatchedToSetter.contains(fieldName)) {
annotations.add(new AnnotationCacheEntry(
fieldName, null,
injections.get(fieldName),
AnnotationCacheEntryType.FIELD));
} else if ((resourceAnnotation =
field.getAnnotation(Resource.class)) != null) {
annotations.add(new AnnotationCacheEntry(fieldName, null,
resourceAnnotation.name(), AnnotationCacheEntryType.FIELD));
} else if (EJB_PRESENT &&
(ejbAnnotation = field.getAnnotation(EJB.class)) != null) {
annotations.add(new AnnotationCacheEntry(fieldName, null,
((EJB) ejbAnnotation).name(), AnnotationCacheEntryType.FIELD));
} else if (WS_PRESENT && (webServiceRefAnnotation =
field.getAnnotation(WebServiceRef.class)) != null) {
annotations.add(new AnnotationCacheEntry(fieldName, null,
((WebServiceRef) webServiceRefAnnotation).name(),
AnnotationCacheEntryType.FIELD));
} else if (JPA_PRESENT && (persistenceContextAnnotation =
field.getAnnotation(PersistenceContext.class)) != null) {
annotations.add(new AnnotationCacheEntry(fieldName, null,
((PersistenceContext) persistenceContextAnnotation).name(),
AnnotationCacheEntryType.FIELD));
} else if (JPA_PRESENT && (persistenceUnitAnnotation =
field.getAnnotation(PersistenceUnit.class)) != null) {
annotations.add(new AnnotationCacheEntry(fieldName, null,
((PersistenceUnit) persistenceUnitAnnotation).name(),
AnnotationCacheEntryType.FIELD));
}
}
}
if (annotations.isEmpty()) {
// Use common object to save memory
annotationsArray = ANNOTATIONS_EMPTY;
} else {
annotationsArray = annotations.toArray(new AnnotationCacheEntry[0]);
}
synchronized (annotationCache) {
annotationCache.put(clazz, annotationsArray);
}
}
clazz = clazz.getSuperclass();
}
}
/**
* Inject resources in specified instance.
*
* @param instance instance to inject into
* @param injections map of injections for this class from xml deployment descriptor
* @throws IllegalAccessException if injection target is inaccessible
* @throws NamingException if value cannot be looked up in jndi
* @throws InvocationTargetException
* if injection fails
*/
protected void processAnnotations(Object instance, Map injections)
throws IllegalAccessException, InvocationTargetException, NamingException {
if (context == null) {
// No resource injection
return;
}
Class clazz = instance.getClass();
while (clazz != null) {
AnnotationCacheEntry[] annotations = annotationCache.get(clazz);
for (AnnotationCacheEntry entry : annotations) {
if (entry.getType() == AnnotationCacheEntryType.SETTER) {
lookupMethodResource(context, instance,
getMethod(clazz, entry),
entry.getName(), clazz);
} else if (entry.getType() == AnnotationCacheEntryType.FIELD) {
lookupFieldResource(context, instance,
getField(clazz, entry),
entry.getName(), clazz);
}
}
clazz = clazz.getSuperclass();
}
}
/**
* Makes cache size available to unit tests.
*
* @return the cache size
*/
protected int getAnnotationCacheSize() {
return annotationCache.size();
}
protected Class loadClassMaybePrivileged(final String className,
final ClassLoader classLoader) throws ClassNotFoundException {
Class clazz;
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
clazz = AccessController.doPrivileged(
new PrivilegedLoadClass(className, classLoader));
} catch (PrivilegedActionException e) {
Throwable t = e.getCause();
if (t instanceof ClassNotFoundException) {
throw (ClassNotFoundException) t;
}
throw new RuntimeException(t);
}
} else {
clazz = loadClass(className, classLoader);
}
checkAccess(clazz);
return clazz;
}
protected Class loadClass(String className, ClassLoader classLoader)
throws ClassNotFoundException {
if (className.startsWith("org.apache.catalina")) {
return containerClassLoader.loadClass(className);
}
try {
Class clazz = containerClassLoader.loadClass(className);
if (ContainerServlet.class.isAssignableFrom(clazz)) {
return clazz;
}
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
}
return classLoader.loadClass(className);
}
private void checkAccess(Class clazz) {
if (privileged) {
return;
}
if (ContainerServlet.class.isAssignableFrom(clazz)) {
throw new SecurityException(sm.getString(
"defaultInstanceManager.restrictedContainerServlet", clazz));
}
while (clazz != null) {
if (restrictedClasses.contains(clazz.getName())) {
throw new SecurityException(sm.getString(
"defaultInstanceManager.restrictedClass", clazz));
}
clazz = clazz.getSuperclass();
}
}
/**
* Inject resources in specified field.
*
* @param context jndi context to extract value from
* @param instance object to inject into
* @param field field target for injection
* @param name jndi name value is bound under
* @param clazz class annotation is defined in
* @throws IllegalAccessException if field is inaccessible
* @throws NamingException if value is not accessible in naming context
*/
protected static void lookupFieldResource(Context context,
Object instance, Field field, String name, Class clazz)
throws NamingException, IllegalAccessException {
Object lookedupResource;
String normalizedName = normalize(name);
if ((normalizedName != null) && (normalizedName.length() > 0)) {
lookedupResource = context.lookup(normalizedName);
} else {
lookedupResource =
context.lookup(clazz.getName() + "/" + field.getName());
}
// This will always be a new Field instance
// Making this instance accessible does not affect other instances
field.setAccessible(true);
field.set(instance, lookedupResource);
}
/**
* Inject resources in specified method.
*
* @param context jndi context to extract value from
* @param instance object to inject into
* @param method field target for injection
* @param name jndi name value is bound under
* @param clazz class annotation is defined in
* @throws IllegalAccessException if method is inaccessible
* @throws NamingException if value is not accessible in naming context
* @throws InvocationTargetException
* if setter call fails
*/
protected static void lookupMethodResource(Context context,
Object instance, Method method, String name, Class clazz)
throws NamingException, IllegalAccessException, InvocationTargetException {
if (!Introspection.isValidSetter(method)) {
throw new IllegalArgumentException(
sm.getString("defaultInstanceManager.invalidInjection"));
}
Object lookedupResource;
String normalizedName = normalize(name);
if ((normalizedName != null) && (normalizedName.length() > 0)) {
lookedupResource = context.lookup(normalizedName);
} else {
lookedupResource = context.lookup(
clazz.getName() + "/" + Introspection.getPropertyName(method));
}
// This will always be a new Method instance
// Making this instance accessible does not affect other instances
method.setAccessible(true);
method.invoke(instance, lookedupResource);
}
private static void loadProperties(Set classNames, String resourceName,
String messageKey, Log log) {
Properties properties = new Properties();
ClassLoader cl = DefaultInstanceManager.class.getClassLoader();
try (InputStream is = cl.getResourceAsStream(resourceName)) {
if (is == null) {
log.error(sm.getString(messageKey, resourceName));
} else {
properties.load(is);
}
} catch (IOException ioe) {
log.error(sm.getString(messageKey, resourceName), ioe);
}
if (properties.isEmpty()) {
return;
}
for (Map.Entry e : properties.entrySet()) {
if ("restricted".equals(e.getValue())) {
classNames.add(e.getKey().toString());
} else {
log.warn(sm.getString(
"defaultInstanceManager.restrictedWrongValue",
resourceName, e.getKey(), e.getValue()));
}
}
}
private static String normalize(String jndiName){
if(jndiName != null && jndiName.startsWith("java:comp/env/")){
return jndiName.substring(14);
}
return jndiName;
}
private static Method getMethod(final Class clazz,
final AnnotationCacheEntry entry) {
Method result = null;
if (Globals.IS_SECURITY_ENABLED) {
result = AccessController.doPrivileged(new PrivilegedGetMethod(clazz, entry));
} else {
try {
result = clazz.getDeclaredMethod(
entry.getAccessibleObjectName(), entry.getParamTypes());
} catch (NoSuchMethodException e) {
// Should never happen. On that basis don't log it.
}
}
return result;
}
private static Field getField(final Class clazz,
final AnnotationCacheEntry entry) {
Field result = null;
if (Globals.IS_SECURITY_ENABLED) {
result = AccessController.doPrivileged(new PrivilegedGetField(clazz, entry));
} else {
try {
result = clazz.getDeclaredField(entry.getAccessibleObjectName());
} catch (NoSuchFieldException e) {
// Should never happen. On that basis don't log it.
}
}
return result;
}
private static Method findPostConstruct(Method currentPostConstruct,
String postConstructFromXml, Method method) {
return findLifecycleCallback(currentPostConstruct,
postConstructFromXml, method, PostConstruct.class);
}
private static Method findPreDestroy(Method currentPreDestroy,
String preDestroyFromXml, Method method) {
return findLifecycleCallback(currentPreDestroy,
preDestroyFromXml, method, PreDestroy.class);
}
private static Method findLifecycleCallback(Method currentMethod,
String methodNameFromXml, Method method,
Class annotation) {
Method result = currentMethod;
if (methodNameFromXml != null) {
if (method.getName().equals(methodNameFromXml)) {
if (!Introspection.isValidLifecycleCallback(method)) {
throw new IllegalArgumentException(
sm.getString("defaultInstanceManager.invalidAnnotation", annotation.getName()));
}
result = method;
}
} else {
if (method.isAnnotationPresent(annotation)) {
if (currentMethod != null || !Introspection.isValidLifecycleCallback(method)) {
throw new IllegalArgumentException(
sm.getString("defaultInstanceManager.invalidAnnotation", annotation.getName()));
}
result = method;
}
}
return result;
}
private static final class AnnotationCacheEntry {
private final String accessibleObjectName;
private final Class[] paramTypes;
private final String name;
private final AnnotationCacheEntryType type;
public AnnotationCacheEntry(String accessibleObjectName,
Class[] paramTypes, String name,
AnnotationCacheEntryType type) {
this.accessibleObjectName = accessibleObjectName;
this.paramTypes = paramTypes;
this.name = name;
this.type = type;
}
public String getAccessibleObjectName() {
return accessibleObjectName;
}
public Class[] getParamTypes() {
return paramTypes;
}
public String getName() {
return name;
}
public AnnotationCacheEntryType getType() {
return type;
}
}
private enum AnnotationCacheEntryType {
FIELD, SETTER, POST_CONSTRUCT, PRE_DESTROY
}
private static class PrivilegedGetField implements PrivilegedAction {
private final Class clazz;
private final AnnotationCacheEntry entry;
public PrivilegedGetField(Class clazz, AnnotationCacheEntry entry) {
this.clazz = clazz;
this.entry = entry;
}
@Override
public Field run() {
Field result = null;
try {
result = clazz.getDeclaredField(entry.getAccessibleObjectName());
} catch (NoSuchFieldException e) {
// Should never happen. On that basis don't log it.
}
return result;
}
}
private static class PrivilegedGetMethod implements PrivilegedAction {
private final Class clazz;
private final AnnotationCacheEntry entry;
public PrivilegedGetMethod(Class clazz, AnnotationCacheEntry entry) {
this.clazz = clazz;
this.entry = entry;
}
@Override
public Method run() {
Method result = null;
try {
result = clazz.getDeclaredMethod(
entry.getAccessibleObjectName(), entry.getParamTypes());
} catch (NoSuchMethodException e) {
// Should never happen. On that basis don't log it.
}
return result;
}
}
private class PrivilegedLoadClass implements PrivilegedExceptionAction> {
private final String className;
private final ClassLoader classLoader;
public PrivilegedLoadClass(String className, ClassLoader classLoader) {
this.className = className;
this.classLoader = classLoader;
}
@Override
public Class run() throws Exception {
return loadClass(className, classLoader);
}
}
}
