/*
 * 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.skywalking.apm.plugin.spring.patch;

import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
import org.springframework.beans.BeanWrapperImpl;

public class GetPropertyDescriptorsInterceptor implements InstanceMethodsAroundInterceptor {
    @Override
    public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
        MethodInterceptResult result) throws Throwable {

    }

    @Override
    public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes,
        Object ret) throws Throwable {

        PropertyDescriptor[] propertyDescriptors = (PropertyDescriptor[])ret;

        if (EnhancedInstance.class.isAssignableFrom(((BeanWrapperImpl)objInst).getRootClass())) {
            List<PropertyDescriptor> newPropertyDescriptors = new ArrayList<PropertyDescriptor>();
            for (PropertyDescriptor descriptor : propertyDescriptors) {
                if (!"skyWalkingDynamicField".equals(descriptor.getName())) {
                    newPropertyDescriptors.add(descriptor);
                }
            }

            return newPropertyDescriptors.toArray(new PropertyDescriptor[newPropertyDescriptors.size()]);
        }

        return ret;
    }

    @Override public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments,
        Class<?>[] argumentsTypes, Throwable t) {

    }
}

@@ -1872,20 +1872,114 @@
         
-if (
+Class%3C?%3E rootClass = ((BeanWrapperImpl) objInst).getRootClass();%0A        if (rootClass != null && 
 Enhanced
@@ -2014,47 +2014,17 @@
 rom(
-((BeanWrapperImpl)objInst).getR
+r
 ootClass
 ()))
@@ -2019,18 +2019,16 @@
 ootClass
-()
 )) %7B%0A   

Fix NullPointerException in Spring interceptor (#4063)