WebappClassLoader (Apache Tomcat 11.0.21 API Documentation)
Description: declaration: package: org.apache.catalina.loader, class: WebappClassLoader

# Class WebappClassLoader

java.lang.Object
java.lang.ClassLoader
java.security.SecureClassLoader
java.net.URLClassLoader
org.apache.catalina.loader.WebappClassLoaderBase
org.apache.catalina.loader.WebappClassLoader

All Implemented Interfaces:
  `Closeable, AutoCloseable, Lifecycle, WebappProperties, InstrumentableClassLoader`

public class WebappClassLoader extends WebappClassLoaderBase

- ## Nested Class Summary

  ### Nested classes/interfaces inherited from class WebappClassLoaderBase

  `WebappClassLoaderBase.PrivilegedFindClassByName, WebappClassLoaderBase.PrivilegedGetClassLoader, WebappClassLoaderBase.PrivilegedJavaseGetResource`

  ### Nested classes/interfaces inherited from interface Lifecycle

  `Lifecycle.SingleUse`

- ## Field Summary

  ### Fields inherited from class WebappClassLoaderBase

  `delegate, loaderPC, parent, permissionList, resourceEntries, resources, sm`

  ### Fields inherited from interface Lifecycle

  `AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `WebappClassLoader()`
  `WebappClassLoader(ClassLoader parent)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `WebappClassLoader`
  `copyWithoutTransformers()`
  Returns a copy of this class loader without any class file transformers.
  `protected Object`
  `getClassLoadingLock(String className)`
  This class loader is not parallel capable so lock on the class loader rather than a per-class lock.

  ### Methods inherited from class WebappClassLoaderBase

  `addLifecycleListener, addTransformer, addURL, checkStateForClassLoading, checkStateForResourceLoading, clearReferences, copyStateWithoutTransformers, destroy, doDefineClass, filter, findClass, findClassInternal, findLifecycleListeners, findLoadedClass0, findResource, findResources, getClearReferencesHttpClientKeepAliveThread, getClearReferencesLogFactoryRelease, getClearReferencesRmiTargets, getClearReferencesStopThreads, getClearReferencesStopTimerThreads, getClearReferencesThreadLocals, getContextName, getDelegate, getHostName, getJavaseClassLoader, getNotFoundClassResourceCacheSize, getPermissions, getResource, getResourceAsStream, getResources, getServiceName, getSkipMemoryLeakChecksOnJvmShutdown, getState, getStateName, getURLs, getWebappName, hasLoggingConfig, init, isPackageSealed, loadClass, loadClass, modified, removeLifecycleListener, removeTransformer, setClearReferencesHttpClientKeepAliveThread, setClearReferencesLogFactoryRelease, setClearReferencesRmiTargets, setClearReferencesStopThreads, setClearReferencesStopTimerThreads, setClearReferencesThreadLocals, setDelegate, setJavaseClassLoader, setNotFoundClassResourceCacheSize, setResources, setSkipMemoryLeakChecksOnJvmShutdown, start, stop, toString`

  ### Methods inherited from class URLClassLoader

  `close, definePackage, newInstance, newInstance`

  ### Methods inherited from class SecureClassLoader

  `defineClass, defineClass`

  ### Methods inherited from class ClassLoader

  `clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findSystemClass, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners`

  ### Methods inherited from class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### WebappClassLoader

    public WebappClassLoader()

  - ### WebappClassLoader

    public WebappClassLoader(ClassLoader parent)

- ## Method Details

  - ### copyWithoutTransformers

    public WebappClassLoader copyWithoutTransformers()
    Description copied from interface: `InstrumentableClassLoader`
    Returns a copy of this class loader without any class file transformers. This is a tool often used by Java Persistence API providers to inspect entity classes in the absence of any instrumentation, something that can't be guaranteed within the context of a `ClassFileTransformer`'s `transform` method.

    The returned class loader's resource cache will have been cleared so that classes already instrumented will not be retained or returned.

    Returns:
      the transformer-free copy of this class loader.

  - ### getClassLoadingLock

    protected Object getClassLoadingLock(String className)
    This class loader is not parallel capable so lock on the class loader rather than a per-class lock.
    Overrides:
      `getClassLoadingLock` in class `ClassLoader`