org.jboss.marshalling.reflect.SerializableClass Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 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 java.io.ObjectInput;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Modifier;
import java.lang.reflect.Field;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.io.ObjectStreamException;
import java.io.ObjectStreamField;
import java.io.ObjectStreamClass;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Collections;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Map;
import org.jboss.marshalling._private.GetUnsafeAction;
import sun.misc.Unsafe;
/**
* Reflection information about a serializable class. Intended for use by implementations of the Marshalling API.
*
* @author Richard Opalka
*/
public final class SerializableClass {
private static final Unsafe unsafe = getSecurityManager() == null ? GetUnsafeAction.INSTANCE.run() : doPrivileged(GetUnsafeAction.INSTANCE);
private static final SerializableClassRegistry REGISTRY = SerializableClassRegistry.getInstanceUnchecked();
private final IdentityHashMap, Constructor> nonInitConstructors;
private final Class subject;
private final JDKSpecific.SerMethods serMethods;
private final SerializableField[] fields;
private final Map fieldsByName;
private final long effectiveSerialVersionUID;
private final boolean isRecord;
private static final Comparator NAME_COMPARATOR = new Comparator() {
public int compare(final SerializableField o1, final SerializableField o2) {
return o1.getName().compareTo(o2.getName());
}
};
/**
* An empty array of fields.
*/
public static final SerializableField[] NOFIELDS = new SerializableField[0];
SerializableClass(Class subject) {
this.subject = subject;
final IdentityHashMap, Constructor> constructorMap = new IdentityHashMap, Constructor>();
for (Class t = subject.getSuperclass(); t != null; t = t.getSuperclass()) {
final SerializableClass lookedUp = REGISTRY.lookup(t);
final Constructor constructor = lookedUp.serMethods.getNoArgConstructor();
if (constructor != null) {
constructorMap.put(t, JDKSpecific.newConstructorForSerialization(subject, constructor));
}
}
nonInitConstructors = constructorMap;
isRecord = JDKSpecific.isRecord(subject);
// private methods
serMethods = new JDKSpecific.SerMethods(subject);
final ObjectStreamClass objectStreamClass = ObjectStreamClass.lookup(subject);
effectiveSerialVersionUID = objectStreamClass == null ? 0L : objectStreamClass.getSerialVersionUID(); // todo find a better solution
if (subject.getSimpleName().indexOf('/') != -1) {
// it's a hidden class
fields = NOFIELDS;
this.fieldsByName = Collections.emptyMap();
} else {
final HashMap fieldsByName = new HashMap();
for (SerializableField serializableField : fields = getSerializableFields(subject, isRecord)) {
fieldsByName.put(serializableField.getName(), serializableField);
}
this.fieldsByName = fieldsByName;
}
}
private static SerializableField[] getSerializableFields(Class clazz, boolean isRecord) {
final Field[] declaredFields = clazz.getDeclaredFields();
if (isRecord) {
final Map map = new HashMap<>();
for (Field field : declaredFields) {
map.put(field.getName(), field);
}
SerializableField.RecordComponent[] recordComponents = JDKSpecific.getRecordComponents(clazz);
SerializableField[] fields = new SerializableField[recordComponents.length];
for (int i = 0; i < recordComponents.length; i++) {
Field field = map.get(recordComponents[i].getName());
fields[i] = new SerializableField(field.getType(), field.getName(), false, field, recordComponents[i]);
}
Arrays.sort(fields, NAME_COMPARATOR);
return fields;
}
final ObjectStreamField[] objectStreamFields = getDeclaredSerialPersistentFields(clazz);
if (objectStreamFields != null) {
final Map map = new HashMap<>();
for (Field field : declaredFields) {
map.put(field.getName(), field);
}
SerializableField[] fields = new SerializableField[objectStreamFields.length];
for (int i = 0; i < objectStreamFields.length; i++) {
ObjectStreamField field = objectStreamFields[i];
final String name = field.getName();
final Field realField = map.get(name);
if (realField != null && realField.getType() == field.getType()) {
// allow direct updating of the field data since the types match
fields[i] = new SerializableField(field.getType(), name, field.isUnshared(), realField, null);
} else {
// no direct update possible
fields[i] = new SerializableField(field.getType(), name, field.isUnshared(), null, null);
}
}
Arrays.sort(fields, NAME_COMPARATOR);
return fields;
}
final ArrayList fields = new ArrayList<>(declaredFields.length);
for (Field field : declaredFields) {
if ((field.getModifiers() & (Modifier.TRANSIENT | Modifier.STATIC)) == 0) {
fields.add(new SerializableField(field.getType(), field.getName(), false, field, null));
}
}
Collections.sort(fields, NAME_COMPARATOR);
return fields.toArray(new SerializableField[0]);
}
private static ObjectStreamField[] getDeclaredSerialPersistentFields(Class clazz) {
final Field field;
try {
field = clazz.getDeclaredField("serialPersistentFields");
} catch (NoSuchFieldException e) {
return null;
}
if (field == null) {
return null;
}
final int requiredModifiers = Modifier.STATIC | Modifier.PRIVATE | Modifier.FINAL;
if ((field.getModifiers() & requiredModifiers) != requiredModifiers) {
return null;
}
try {
return (ObjectStreamField[]) unsafe.getObject(unsafe.staticFieldBase(field), unsafe.staticFieldOffset(field));
} catch (ClassCastException e) {
return null;
}
}
/**
* Get the serializable fields of this class. The returned array is a direct reference, so care should be taken
* not to modify it.
*
* @return the fields
*/
public SerializableField[] getFields() {
return fields;
}
/**
* Create a synthetic field for this object class.
*
* @param name the name of the field
* @param fieldType the field type
* @param unshared {@code true} if the field should be unshared
* @return the field
* @throws ClassNotFoundException if a class was not found while looking up the subject class
*/
public SerializableField getSerializableField(String name, Class fieldType, boolean unshared) throws ClassNotFoundException {
final SerializableField serializableField = fieldsByName.get(name);
if (serializableField != null) {
return serializableField;
}
return new SerializableField(fieldType, name, unshared, null, null);
}
/**
* Determine whether this class has a {@code writeObject()} method.
*
* @return {@code true} if there is a {@code writeObject()} method
*/
public boolean hasWriteObject() {
return serMethods.hasWriteObject();
}
/**
* Invoke the {@code writeObject()} method for an object.
*
* @param object the object to invoke on
* @param outputStream the object output stream to pass in
* @throws IOException if an I/O error occurs
*/
public void callWriteObject(Object object, ObjectOutputStream outputStream) throws IOException {
serMethods.callWriteObject(object, outputStream);
}
/**
* Determine whether this class has a {@code readObject()} method.
*
* @return {@code true} if there is a {@code readObject()} method
*/
public boolean hasReadObject() {
return serMethods.hasReadObject();
}
/**
* Invoke the {@code readObject()} method for an object.
*
* @param object the object to invoke on
* @param inputStream the object input stream to pass in
* @throws IOException if an I/O error occurs
* @throws ClassNotFoundException if a class was not able to be loaded
*/
public void callReadObject(Object object, ObjectInputStream inputStream) throws IOException, ClassNotFoundException {
serMethods.callReadObject(object, inputStream);
}
/**
* Determine whether this class has a {@code readObjectNoData()} method.
*
* @return {@code true} if there is a {@code readObjectNoData()} method
*/
public boolean hasReadObjectNoData() {
return serMethods.hasReadObjectNoData();
}
/**
* Invoke the {@code readObjectNoData()} method for an object.
*
* @param object the object to invoke on
* @throws ObjectStreamException if an I/O error occurs
*/
public void callReadObjectNoData(Object object) throws ObjectStreamException {
serMethods.callReadObjectNoData(object);
}
/**
* Determine whether this class has a {@code writeReplace()} method.
*
* @return {@code true} if there is a {@code writeReplace()} method
*/
public boolean hasWriteReplace() {
return serMethods.hasWriteReplace();
}
/**
* Invoke the {@code writeReplace()} method for an object.
*
* @param object the object to invoke on
* @return the nominated replacement object
* @throws ObjectStreamException if an I/O error occurs
*/
public Object callWriteReplace(Object object) throws ObjectStreamException {
return serMethods.callWriteReplace(object);
}
/**
* Determine whether this class has a {@code readResolve()} method.
*
* @return {@code true} if there is a {@code readResolve()} method
*/
public boolean hasReadResolve() {
return serMethods.hasReadResolve();
}
/**
* Invoke the {@code readResolve()} method for an object.
*
* @param object the object to invoke on
* @return the original object
* @throws ObjectStreamException if an I/O error occurs
*/
public Object callReadResolve(Object object) throws ObjectStreamException {
return serMethods.callReadResolve(object);
}
/**
* Determine whether this class has a public no-arg constructor.
*
* @return {@code true} if there is such a constructor
*/
public boolean hasPublicNoArgConstructor() {
final Constructor noArgConstructor = serMethods.getNoArgConstructor();
return noArgConstructor != null && Modifier.isPublic(noArgConstructor.getModifiers());
}
/**
* Invoke the no-arg constructor on this class.
*
* @return the new instance
* @throws IOException if an I/O error occurs
*/
public Object callNoArgConstructor() throws IOException {
final Constructor noArgConstructor = serMethods.getNoArgConstructor();
return invokeConstructor(noArgConstructor);
}
/**
* Determine whether this class has a public constructor accepting an ObjectInput.
*
* @return {@code true} if there is such a constructor
*/
public boolean hasObjectInputConstructor() {
final Constructor objectInputConstructor = serMethods.getObjectInputConstructor();
return objectInputConstructor != null && Modifier.isPublic(objectInputConstructor.getModifiers());
}
/**
* Invoke the public constructor accepting an ObjectInput.
*
* @param objectInput the ObjectInput to pass to the constructor
* @return the new instance
* @throws IOException if an I/O error occurs
*/
public Object callObjectInputConstructor(final ObjectInput objectInput) throws IOException {
final Constructor objectInputConstructor = serMethods.getObjectInputConstructor();
return invokeConstructor(objectInputConstructor, objectInput);
}
/**
* Determine whether this class has a non-init constructor.
*
* @return whether this class has a non-init constructor
*/
public boolean hasNoInitConstructor(Class target) {
return nonInitConstructors.containsKey(target);
}
/**
* Invoke the non-init constructor on this class.
*
* @return the new instance
*/
public Object callNonInitConstructor(Class target) {
return invokeConstructorNoException(nonInitConstructors.get(target));
}
private static T invokeConstructor(Constructor constructor, Object... args) throws IOException {
if (constructor == null) {
throw new IllegalArgumentException("No matching constructor");
}
try {
return constructor.newInstance(args);
} catch (InvocationTargetException e) {
final Throwable te = e.getTargetException();
if (te instanceof IOException) {
throw (IOException)te;
} else if (te instanceof RuntimeException) {
throw (RuntimeException)te;
} else if (te instanceof Error) {
throw (Error)te;
} else {
throw new IllegalStateException("Unexpected exception", te);
}
} catch (InstantiationException e) {
throw new IllegalStateException("Instantiation failed unexpectedly");
} catch (IllegalAccessException e) {
throw new IllegalStateException("Constructor is unexpectedly inaccessible");
}
}
private static T invokeConstructorNoException(Constructor constructor, Object... args) {
if (constructor == null) {
throw new IllegalArgumentException("No matching constructor");
}
try {
return constructor.newInstance(args);
} catch (InvocationTargetException e) {
final Throwable te = e.getTargetException();
if (te instanceof RuntimeException) {
throw (RuntimeException)te;
} else if (te instanceof Error) {
throw (Error)te;
} else {
throw new IllegalStateException("Unexpected exception", te);
}
} catch (InstantiationException e) {
throw new IllegalStateException("Instantiation failed unexpectedly");
} catch (IllegalAccessException e) {
throw new IllegalStateException("Constructor is unexpectedly inaccessible");
}
}
/**
* Get the effective serial version UID of this class.
*
* @return the serial version UID
*/
public long getEffectiveSerialVersionUID() {
return effectiveSerialVersionUID;
}
/**
* Get the {@code Class} of this class.
*
* @return the subject class
*/
public Class getSubjectClass() {
return subject;
}
@SuppressWarnings("unchecked")
Constructor getNoArgConstructor() {
return (Constructor) serMethods.getNoArgConstructor();
}
public String toString() {
return String.format("Serializable %s", getSubjectClass());
}
@SuppressWarnings("unchecked")
Constructor getNoInitConstructor() {
Class clazz = getClass();
while (Serializable.class.isAssignableFrom(clazz)) {
clazz = clazz.getSuperclass();
}
return (Constructor) nonInitConstructors.get(clazz);
}
JDKSpecific.SerMethods getSerMethods() {
return serMethods;
}
/**
* Determine if this class is a record.
*
* @return The record components or null
*/
public boolean isRecord() {
return isRecord;
}
/**
* Invokes the record constructor for this class. If the class is not a record
* or the values are incorrect a IllegalStateException is thrown.
* @param args The record arguments for the constructor
* @return The new record created
*/
public Object invokeRecordCanonicalConstructor(Object[] args) {
return JDKSpecific.invokeRecordCanonicalConstructor(subject, fields, args);
}
}