jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/bind/v2/ClassFactory.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/bind/v2/ClassFactory.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/bind/v2/ClassFactory.java

Thu, 31 Aug 2017 15:18:52 +0800

author: aoqi
date: Thu, 31 Aug 2017 15:18:52 +0800
changeset 637: 9c07ef4934dd
parent 368: 0989ad8c0860
parent 0: 373ffda63c9a
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.xml.internal.bind.v2;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.lang.ref.WeakReference;
 import java.util.Map;
 import java.util.WeakHashMap;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import com.sun.xml.internal.bind.Util;
 /**
  * Creates new instances of classes.
  *
  * <p>
  * This code handles the case where the class is not public or the constructor is
  * not public.
  *
  * @since 2.0
  * @author Kohsuke Kawaguchi
  */
 public final class ClassFactory {
     private static final Class[] emptyClass = new Class[0];
     private static final Object[] emptyObject = new Object[0];
     private static final Logger logger = Util.getClassLogger();
     /**
      * Cache from a class to its default constructor.
      *
      * To avoid synchronization among threads, we use {@link ThreadLocal}.
      */
     private static final ThreadLocal<Map<Class, WeakReference<Constructor>>> tls = new ThreadLocal<Map<Class,WeakReference<Constructor>>>() {
         @Override
         public Map<Class,WeakReference<Constructor>> initialValue() {
             return new WeakHashMap<Class,WeakReference<Constructor>>();
         }
     };
     public static void cleanCache() {
         if (tls != null) {
             try {
                 tls.remove();
             } catch (Exception e) {
                 logger.log(Level.WARNING, "Unable to clean Thread Local cache of classes used in Unmarshaller: {0}", e.getLocalizedMessage());
             }
         }
     }
     /**
      * Creates a new instance of the class but throw exceptions without catching it.
      */
     public static <T> T create0( final Class<T> clazz ) throws IllegalAccessException, InvocationTargetException, InstantiationException {
         Map<Class,WeakReference<Constructor>> m = tls.get();
         Constructor<T> cons = null;
         WeakReference<Constructor> consRef = m.get(clazz);
         if(consRef!=null)
             cons = consRef.get();
         if(cons==null) {
             try {
                 cons = clazz.getDeclaredConstructor(emptyClass);
             } catch (NoSuchMethodException e) {
                 logger.log(Level.INFO,"No default constructor found on "+clazz,e);
                 NoSuchMethodError exp;
                 if(clazz.getDeclaringClass()!=null && !Modifier.isStatic(clazz.getModifiers())) {
                     exp = new NoSuchMethodError(Messages.NO_DEFAULT_CONSTRUCTOR_IN_INNER_CLASS.format(clazz.getName()));
                 } else {
                     exp = new NoSuchMethodError(e.getMessage());
                 }
                 exp.initCause(e);
                 throw exp;
             }
             int classMod = clazz.getModifiers();
             if(!Modifier.isPublic(classMod) || !Modifier.isPublic(cons.getModifiers())) {
                 // attempt to make it work even if the constructor is not accessible
                 try {
                     cons.setAccessible(true);
                 } catch(SecurityException e) {
                     // but if we don't have a permission to do so, work gracefully.
                     logger.log(Level.FINE,"Unable to make the constructor of "+clazz+" accessible",e);
                     throw e;
                 }
             }
             m.put(clazz,new WeakReference<Constructor>(cons));
         }
         return cons.newInstance(emptyObject);
     }
     /**
      * The same as {@link #create0} but with an error handling to make
      * the instantiation error fatal.
      */
     public static <T> T create( Class<T> clazz ) {
         try {
             return create0(clazz);
         } catch (InstantiationException e) {
             logger.log(Level.INFO,"failed to create a new instance of "+clazz,e);
             throw new InstantiationError(e.toString());
         } catch (IllegalAccessException e) {
             logger.log(Level.INFO,"failed to create a new instance of "+clazz,e);
             throw new IllegalAccessError(e.toString());
         } catch (InvocationTargetException e) {
             Throwable target = e.getTargetException();
             // most likely an error on the user's code.
             // just let it through for the ease of debugging
             if(target instanceof RuntimeException)
                 throw (RuntimeException)target;
             // error. just forward it for the ease of debugging
             if(target instanceof Error)
                 throw (Error)target;
             // a checked exception.
             // not sure how we should report this error,
             // but for now we just forward it by wrapping it into a runtime exception
             throw new IllegalStateException(target);
         }
     }
     /**
      *  Call a method in the factory class to get the object.
      */
     public static Object create(Method method) {
         Throwable errorMsg;
         try {
             return method.invoke(null, emptyObject);
         } catch (InvocationTargetException ive) {
             Throwable target = ive.getTargetException();
             if(target instanceof RuntimeException)
                 throw (RuntimeException)target;
             if(target instanceof Error)
                 throw (Error)target;
             throw new IllegalStateException(target);
         } catch (IllegalAccessException e) {
             logger.log(Level.INFO,"failed to create a new instance of "+method.getReturnType().getName(),e);
             throw new IllegalAccessError(e.toString());
         } catch (IllegalArgumentException iae){
             logger.log(Level.INFO,"failed to create a new instance of "+method.getReturnType().getName(),iae);
             errorMsg = iae;
         } catch (NullPointerException npe){
             logger.log(Level.INFO,"failed to create a new instance of "+method.getReturnType().getName(),npe);
             errorMsg = npe;
         } catch (ExceptionInInitializerError eie){
             logger.log(Level.INFO,"failed to create a new instance of "+method.getReturnType().getName(),eie);
             errorMsg = eie;
         }
         NoSuchMethodError exp;
         exp = new NoSuchMethodError(errorMsg.getMessage());
         exp.initCause(errorMsg);
         throw exp;
     }
     /**
      * Infers the instanciable implementation class that can be assigned to the given field type.
      *
      * @return null
      *      if inference fails.
      */
     public static <T> Class<? extends T> inferImplClass(Class<T> fieldType, Class[] knownImplClasses) {
         if(!fieldType.isInterface())
             return fieldType;
         for( Class<?> impl : knownImplClasses ) {
             if(fieldType.isAssignableFrom(impl))
                 return impl.asSubclass(fieldType);
         }
         // if we can't find an implementation class,
         // let's just hope that we will never need to create a new object,
         // and returns null
         return null;
     }
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/xml/internal/bind/v2/ClassFactory.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/bind/v2/ClassFactory.java