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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2016 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed 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.jboss.marshalling.reflect;

import static java.lang.System.getSecurityManager;
import static java.security.AccessController.doPrivileged;
import static sun.reflect.ReflectionFactory.getReflectionFactory;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamException;
import java.lang.invoke.MethodHandle;
import java.lang.reflect.Constructor;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.PrivilegedAction;
import sun.reflect.ReflectionFactory;

/**
 * JDK-specific classes which are replaced for different JDK major versions.  This one is for Java 9 only.
 *
 * @author Richard Opalka
 */
final class JDKSpecific {

    private static final ReflectionFactory reflectionFactory = getSecurityManager() == null ? getReflectionFactory() : doPrivileged(new PrivilegedAction() {
        public ReflectionFactory run() { return ReflectionFactory.getReflectionFactory(); }
    });

    static Constructor newConstructorForSerialization(Class classToInstantiate, Constructor constructorToCall) {
        return reflectionFactory.newConstructorForSerialization(classToInstantiate, constructorToCall);
    }

    /**
     * Return if this class is a record type.
     * @param type The class type
     * @return true if the class is a record, false otherwise
     */
    static boolean isRecord(Class type) {
        // in java previous 16 is false
        return false;
    }

    /**
     * Returns an ordered array of the record components for the given record
     * class.
     * @param type The record class
     * @return The record components array for this class
     */
    static SerializableField.RecordComponent[] getRecordComponents(Class type) {
        throw new UnsupportedOperationException("Records not supported in this version of java");
    }

    /**
     * Retrieves the value of the record component for the given record object.
     * @param recordObject The record Object
     * @param name The record component name
     * @param type The record component class type
     * @return The record component for this record object
     * @throws java.io.IOException Some error
     */
    static Object getRecordComponentValue(Object recordObject, String name, Class type) {
        throw new UnsupportedOperationException("Records not supported in this version of java");
    }

    /**
     * Invokes the canonical constructor of a record class with the
     * given argument values.
     * @param recordType The record class
     * @param fields The fields of the record class
     * @param args The arguments for the constructor
     * @return The instantiated object
     * @throws java.io.IOException
     */
    static Object invokeRecordCanonicalConstructor(Class recordType, SerializableField[] fields, Object[] args) {
        throw new UnsupportedOperationException("Records not supported in this version of java");
    }

    static final class SerMethods {
        private final MethodHandle readObject;
        private final MethodHandle readObjectNoData;
        private final MethodHandle writeObject;
        private final MethodHandle readResolve;
        private final MethodHandle writeReplace;
        private final Constructor noArgConstructor;
        private final Constructor objectInputConstructor;

        SerMethods(Class clazz) {
            readObject = reflectionFactory.readObjectForSerialization(clazz);
            readObjectNoData = reflectionFactory.readObjectNoDataForSerialization(clazz);
            writeObject = reflectionFactory.writeObjectForSerialization(clazz);
            readResolve = reflectionFactory.readResolveForSerialization(clazz);
            writeReplace = reflectionFactory.writeReplaceForSerialization(clazz);
            Constructor ctor;
            Constructor noArgConstructor = null;
            try {
                ctor = clazz.getDeclaredConstructor();
                noArgConstructor = reflectionFactory.newConstructorForSerialization(clazz, ctor);
            } catch (NoSuchMethodException ignored) {
            }
            this.noArgConstructor = noArgConstructor;
            Constructor objectInputConstructor = null;
            try {
                ctor = clazz.getDeclaredConstructor(ObjectInput.class);
                objectInputConstructor = reflectionFactory.newConstructorForSerialization(clazz, ctor);
            } catch (NoSuchMethodException ignored) {
            }
            this.objectInputConstructor = objectInputConstructor;
        }

        boolean hasWriteObject() {
            return writeObject != null;
        }

        void callWriteObject(Object object, ObjectOutputStream outputStream) throws IOException {
            try {
                writeObject.invoke(object, outputStream);
            } catch (IOException | RuntimeException | Error e) {
                throw e;
            } catch (Throwable e) {
                throw new UndeclaredThrowableException(e);
            }
        }

        boolean hasReadObject() {
            return readObject != null;
        }

        void callReadObject(Object object, ObjectInputStream inputStream) throws IOException, ClassNotFoundException {
            try {
                readObject.invoke(object, inputStream);
            } catch (IOException | ClassNotFoundException | RuntimeException | Error e) {
                throw e;
            } catch (Throwable e) {
                throw new UndeclaredThrowableException(e);
            }
        }

        boolean hasReadObjectNoData() {
            return readObjectNoData != null;
        }

        void callReadObjectNoData(Object object) throws ObjectStreamException {
            try {
                readObjectNoData.invoke(object);
            } catch (ObjectStreamException | RuntimeException | Error e) {
                throw e;
            } catch (Throwable e) {
                throw new UndeclaredThrowableException(e);
            }
        }

        boolean hasWriteReplace() {
            return writeReplace != null;
        }

        Object callWriteReplace(Object object) throws ObjectStreamException {
            try {
                return writeReplace.invoke(object);
            } catch (ObjectStreamException | RuntimeException | Error e) {
                throw e;
            } catch (Throwable e) {
                throw new UndeclaredThrowableException(e);
            }
        }

        boolean hasReadResolve() {
            return readResolve != null;
        }

        Object callReadResolve(Object object) throws ObjectStreamException {
            try {
                return readResolve.invoke(object);
            } catch (ObjectStreamException | RuntimeException | Error e) {
                throw e;
            } catch (Throwable e) {
                throw new UndeclaredThrowableException(e);
            }
        }

        Constructor getNoArgConstructor() {
            return noArgConstructor;
        }

        Constructor getObjectInputConstructor() {
            return objectInputConstructor;
        }
    }
}




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