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ClassHelper.java
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ClassHelper.java
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/**
* 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.cxf.common.util;
import java.lang.reflect.Proxy;
import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
/**
*
*/
public class ClassHelper {
public static final String USE_DEFAULT_CLASS_HELPER = "org.apache.cxf.useDefaultClassHelpers";
static final ClassHelper HELPER;
static final ClassUnwrapper DEFAULT_UNWRAPPER;
static final ClassUnwrapper UNWRAPPER;
/**
* Default class unwrapper implementation which delegates to the ClassHelper
* internal methods.
*
*/
private static class DefaultClassUnwrapper implements ClassUnwrapper {
private final ClassHelper helper;
DefaultClassUnwrapper(ClassHelper helper) {
this.helper = helper;
}
@Override
public Class<?> getRealClassFromClass(Class<?> clazz) {
return helper.getRealClassFromClassInternal(clazz);
}
@Override
public Class<?> getRealClass(Object o) {
return helper.getRealClassInternal(o);
}
@Override
public Object getRealObject(Object o) {
return helper.getRealObjectInternal(o);
}
}
static {
HELPER = new ClassHelper();
DEFAULT_UNWRAPPER = new DefaultClassUnwrapper(HELPER);
UNWRAPPER = getClassUnwrapper(DEFAULT_UNWRAPPER);
}
protected ClassHelper() {
}
private static ClassUnwrapper getClassUnwrapper(ClassUnwrapper defaultHelper) {
boolean useSpring = true;
String s = SystemPropertyAction.getPropertyOrNull("org.apache.cxf.useSpringClassHelpers");
if (!StringUtils.isEmpty(s)) {
useSpring = "1".equals(s) || Boolean.parseBoolean(s);
}
if (useSpring) {
try {
return new SpringClassUnwrapper();
} catch (Throwable ex) {
// ignore
}
}
return defaultHelper;
}
private Class<?> getRealClassInternal(Object o) {
return getRealObjectInternal(o).getClass();
}
private Class<?> getRealClassFromClassInternal(Class<?> cls) {
return cls;
}
private Object getRealObjectInternal(Object o) {
return o instanceof Proxy ? Proxy.getInvocationHandler(o) : o;
}
public static Class<?> getRealClass(Object o) {
return getRealClass(null, o);
}
public static Class<?> getRealClassFromClass(Class<?> cls) {
return getRealClassFromClass(null, cls);
}
public static Class<?> getRealClassFromClass(Bus bus, Class<?> cls) {
return getContextClassUnwrapper(getBus(bus)).getRealClassFromClass(cls);
}
public static Object getRealObject(Object o) {
return getContextClassUnwrapper(getBus(null)).getRealObject(o);
}
public static Class<?> getRealClass(Bus bus, Object o) {
return getContextClassUnwrapper(getBus(bus)).getRealClass(o);
}
private static ClassUnwrapper getContextClassUnwrapper(Bus bus) {
if (bus != null && bus.getProperty(ClassUnwrapper.class.getName()) != null) {
return (ClassUnwrapper) bus.getProperty(ClassUnwrapper.class.getName());
}
return (DEFAULT_UNWRAPPER == UNWRAPPER || checkUseDefaultClassHelper(bus)) ? DEFAULT_UNWRAPPER : UNWRAPPER;
}
private static Bus getBus(Bus bus) {
return bus == null ? BusFactory.getThreadDefaultBus() : bus;
}
private static boolean checkUseDefaultClassHelper(Bus bus) {
return bus != null && Boolean.TRUE.equals(bus.getProperty(USE_DEFAULT_CLASS_HELPER));
}
}