/*
* Copyright (c) 2001-2008 Caucho Technology, Inc. All rights reserved.
*
* The Apache Software License, Version 1.1
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Burlap", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* info@caucho.com.
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @author Scott Ferguson
*/
package com.caucho.hessian.io;
import java.io.IOException;
import java.io.Serializable;
import java.lang.ref.SoftReference;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.WeakHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.caucho.hessian.HessianUnshared;
import sun.misc.Unsafe;
/**
* Serializing an object for known object types.
*/
public class UnsafeSerializer extends AbstractSerializer
{
private static final Logger log
= Logger.getLogger(UnsafeSerializer.class.getName());
private static boolean _isEnabled;
private static Unsafe _unsafe;
private static final WeakHashMap<Class<?>,SoftReference<UnsafeSerializer>> _serializerMap
= new WeakHashMap<Class<?>,SoftReference<UnsafeSerializer>>();
private static Object []NULL_ARGS = new Object[0];
private Field []_fields;
private FieldSerializer []_fieldSerializers;
public static boolean isEnabled()
{
return _isEnabled;
}
public UnsafeSerializer(Class<?> cl)
{
introspect(cl);
}
public static UnsafeSerializer create(Class<?> cl)
{
ClassLoader loader = cl.getClassLoader();
synchronized (_serializerMap) {
SoftReference<UnsafeSerializer> baseRef
= _serializerMap.get(cl);
UnsafeSerializer base = baseRef != null ? baseRef.get() : null;
if (base == null) {
if (cl.isAnnotationPresent(HessianUnshared.class))
base = new UnsafeUnsharedSerializer(cl);
else
base = new UnsafeSerializer(cl);
baseRef = new SoftReference<UnsafeSerializer>(base);
_serializerMap.put(cl, baseRef);
}
return base;
}
}
protected void introspect(Class<?> cl)
{
ArrayList<Field> primitiveFields = new ArrayList<Field>();
ArrayList<Field> compoundFields = new ArrayList<Field>();
for (; cl != null; cl = cl.getSuperclass()) {
Field []fields = cl.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = fields[i];
if (Modifier.isTransient(field.getModifiers())
|| Modifier.isStatic(field.getModifiers()))
continue;
// XXX: could parameterize the handler to only deal with public
field.setAccessible(true);
if (field.getType().isPrimitive()
|| (field.getType().getName().startsWith("java.lang.")
&& ! field.getType().equals(Object.class)))
primitiveFields.add(field);
else
compoundFields.add(field);
}
}
ArrayList<Field> fields = new ArrayList<Field>();
fields.addAll(primitiveFields);
fields.addAll(compoundFields);
_fields = new Field[fields.size()];
fields.toArray(_fields);
_fieldSerializers = new FieldSerializer[_fields.length];
for (int i = 0; i < _fields.length; i++) {
_fieldSerializers[i] = getFieldSerializer(_fields[i]);
}
}
@Override
public void writeObject(Object obj, AbstractHessianOutput out)
throws IOException
{
if (out.addRef(obj)) {
return;
}
Class<?> cl = obj.getClass();
int ref = out.writeObjectBegin(cl.getName());
if (ref >= 0) {
writeInstance(obj, out);
}
else if (ref == -1) {
writeDefinition20(out);
out.writeObjectBegin(cl.getName());
writeInstance(obj, out);
}
else {
writeObject10(obj, out);
}
}
protected void writeObject10(Object obj, AbstractHessianOutput out)
throws IOException
{
for (int i = 0; i < _fields.length; i++) {
Field field = _fields[i];
out.writeString(field.getName());
_fieldSerializers[i].serialize(out, obj);
}
out.writeMapEnd();
}
private void writeDefinition20(AbstractHessianOutput out)
throws IOException
{
out.writeClassFieldLength(_fields.length);
for (int i = 0; i < _fields.length; i++) {
Field field = _fields[i];
out.writeString(field.getName());
}
}
final public void writeInstance(Object obj, AbstractHessianOutput out)
throws IOException
{
try {
FieldSerializer []fieldSerializers = _fieldSerializers;
int length = fieldSerializers.length;
for (int i = 0; i < length; i++) {
fieldSerializers[i].serialize(out, obj);
}
} catch (RuntimeException e) {
throw new RuntimeException(e.getMessage() + "\n class: "
+ obj.getClass().getName()
+ " (object=" + obj + ")",
e);
} catch (IOException e) {
throw new IOExceptionWrapper(e.getMessage() + "\n class: "
+ obj.getClass().getName()
+ " (object=" + obj + ")",
e);
}
}
private static FieldSerializer getFieldSerializer(Field field)
{
Class<?> type = field.getType();
if (boolean.class.equals(type)) {
return new BooleanFieldSerializer(field);
}
else if (byte.class.equals(type)) {
return new ByteFieldSerializer(field);
}
else if (char.class.equals(type)) {
return new CharFieldSerializer(field);
}
else if (short.class.equals(type)) {
return new ShortFieldSerializer(field);
}
else if (int.class.equals(type)) {
return new IntFieldSerializer(field);
}
else if (long.class.equals(type)) {
return new LongFieldSerializer(field);
}
else if (double.class.equals(type)) {
return new DoubleFieldSerializer(field);
}
else if (float.class.equals(type)) {
return new FloatFieldSerializer(field);
}
else if (String.class.equals(type)) {
return new StringFieldSerializer(field);
}
else if (java.util.Date.class.equals(type)
|| java.sql.Date.class.equals(type)
|| java.sql.Timestamp.class.equals(type)
|| java.sql.Time.class.equals(type)) {
return new DateFieldSerializer(field);
}
else
return new ObjectFieldSerializer(field);
}
abstract static class FieldSerializer {
abstract void serialize(AbstractHessianOutput out, Object obj)
throws IOException;
}
final static class ObjectFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
ObjectFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
@Override
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
try {
Object value = _unsafe.getObject(obj, _offset);
out.writeObject(value);
} catch (RuntimeException e) {
throw new RuntimeException(e.getMessage() + "\n field: "
+ _field.getDeclaringClass().getName()
+ '.' + _field.getName(),
e);
} catch (IOException e) {
throw new IOExceptionWrapper(e.getMessage() + "\n field: "
+ _field.getDeclaringClass().getName()
+ '.' + _field.getName(),
e);
}
}
}
final static class BooleanFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
BooleanFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
boolean value = _unsafe.getBoolean(obj, _offset);
out.writeBoolean(value);
}
}
final static class ByteFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
ByteFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
int value = _unsafe.getByte(obj, _offset);
out.writeInt(value);
}
}
final static class CharFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
CharFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
char value = _unsafe.getChar(obj, _offset);
out.writeString(String.valueOf(value));
}
}
final static class ShortFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
ShortFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
int value = _unsafe.getShort(obj, _offset);
out.writeInt(value);
}
}
final static class IntFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
IntFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
int value = _unsafe.getInt(obj, _offset);
out.writeInt(value);
}
}
final static class LongFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
LongFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
long value = _unsafe.getLong(obj, _offset);
out.writeLong(value);
}
}
final static class FloatFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
FloatFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
double value = _unsafe.getFloat(obj, _offset);
out.writeDouble(value);
}
}
final static class DoubleFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
DoubleFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
double value = _unsafe.getDouble(obj, _offset);
out.writeDouble(value);
}
}
final static class StringFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
StringFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
@Override
final void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
String value = (String) _unsafe.getObject(obj, _offset);
out.writeString(value);
}
}
final static class DateFieldSerializer extends FieldSerializer {
private final Field _field;
private final long _offset;
DateFieldSerializer(Field field)
{
_field = field;
_offset = _unsafe.objectFieldOffset(field);
if (_offset == Unsafe.INVALID_FIELD_OFFSET)
throw new IllegalStateException();
}
@Override
void serialize(AbstractHessianOutput out, Object obj)
throws IOException
{
java.util.Date value
= (java.util.Date) _unsafe.getObject(obj, _offset);
if (value == null)
out.writeNull();
else
out.writeUTCDate(value.getTime());
}
}
static {
boolean isEnabled = false;
try {
Class unsafe = Class.forName("sun.misc.Unsafe");
Field theUnsafe = null;
for (Field field : unsafe.getDeclaredFields()) {
if (field.getName().equals("theUnsafe"))
theUnsafe = field;
}
if (theUnsafe != null) {
theUnsafe.setAccessible(true);
_unsafe = (Unsafe) theUnsafe.get(null);
}
isEnabled = _unsafe != null;
String unsafeProp = System.getProperty("com.caucho.hessian.unsafe");
if ("false".equals(unsafeProp))
isEnabled = false;
} catch (Throwable e) {
log.log(Level.FINER, e.toString(), e);
}
_isEnabled = isEnabled;
}
}