/*
* 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.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.logging.*;
import com.caucho.hessian.io.UnsafeDeserializer.FieldDeserializer;
/**
* Serializing an object for known object types.
*/
public class JavaDeserializer extends AbstractMapDeserializer {
private Class<?> _type;
private HashMap<?,FieldDeserializer> _fieldMap;
private Method _readResolve;
private Constructor<?> _constructor;
private Object []_constructorArgs;
public JavaDeserializer(Class<?> cl)
{
_type = cl;
_fieldMap = getFieldMap(cl);
_readResolve = getReadResolve(cl);
if (_readResolve != null) {
_readResolve.setAccessible(true);
}
Constructor<?> []constructors = cl.getDeclaredConstructors();
long bestCost = Long.MAX_VALUE;
for (int i = 0; i < constructors.length; i++) {
Class<?> []param = constructors[i].getParameterTypes();
long cost = 0;
for (int j = 0; j < param.length; j++) {
cost = 4 * cost;
if (Object.class.equals(param[j]))
cost += 1;
else if (String.class.equals(param[j]))
cost += 2;
else if (int.class.equals(param[j]))
cost += 3;
else if (long.class.equals(param[j]))
cost += 4;
else if (param[j].isPrimitive())
cost += 5;
else
cost += 6;
}
if (cost < 0 || cost > (1 << 48))
cost = 1 << 48;
cost += (long) param.length << 48;
if (cost < bestCost) {
_constructor = constructors[i];
bestCost = cost;
}
}
if (_constructor != null) {
_constructor.setAccessible(true);
Class<?> []params = _constructor.getParameterTypes();
_constructorArgs = new Object[params.length];
for (int i = 0; i < params.length; i++) {
_constructorArgs[i] = getParamArg(params[i]);
}
}
}
@Override
public Class<?> getType()
{
return _type;
}
@Override
public boolean isReadResolve()
{
return _readResolve != null;
}
public Object readMap(AbstractHessianInput in)
throws IOException
{
try {
Object obj = instantiate();
return readMap(in, obj);
} catch (IOException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(_type.getName() + ":" + e.getMessage(), e);
}
}
@Override
public Object []createFields(int len)
{
return new FieldDeserializer[len];
}
public Object createField(String name)
{
Object reader = _fieldMap.get(name);
if (reader == null)
reader = NullFieldDeserializer.DESER;
return reader;
}
@Override
public Object readObject(AbstractHessianInput in,
Object []fields)
throws IOException
{
try {
Object obj = instantiate();
return readObject(in, obj, (FieldDeserializer []) fields);
} catch (IOException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(_type.getName() + ":" + e.getMessage(), e);
}
}
@Override
public Object readObject(AbstractHessianInput in,
String []fieldNames)
throws IOException
{
try {
Object obj = instantiate();
return readObject(in, obj, fieldNames);
} catch (IOException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(_type.getName() + ":" + e.getMessage(), e);
}
}
/**
* Returns the readResolve method
*/
protected Method getReadResolve(Class<?> cl)
{
for (; cl != null; cl = cl.getSuperclass()) {
Method []methods = cl.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
if (method.getName().equals("readResolve")
&& method.getParameterTypes().length == 0)
return method;
}
}
return null;
}
public Object readMap(AbstractHessianInput in, Object obj)
throws IOException
{
try {
int ref = in.addRef(obj);
while (! in.isEnd()) {
Object key = in.readObject();
FieldDeserializer deser = _fieldMap.get(key);
if (deser != null)
deser.deserialize(in, obj);
else
in.readObject();
}
in.readMapEnd();
Object resolve = resolve(in, obj);
if (obj != resolve)
in.setRef(ref, resolve);
return resolve;
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(e);
}
}
private Object readObject(AbstractHessianInput in,
Object obj,
FieldDeserializer []fields)
throws IOException
{
try {
int ref = in.addRef(obj);
for (FieldDeserializer reader : fields) {
reader.deserialize(in, obj);
}
Object resolve = resolve(in, obj);
if (obj != resolve)
in.setRef(ref, resolve);
return resolve;
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(obj.getClass().getName() + ":" + e, e);
}
}
public Object readObject(AbstractHessianInput in,
Object obj,
String []fieldNames)
throws IOException
{
try {
int ref = in.addRef(obj);
for (String fieldName : fieldNames) {
FieldDeserializer reader = _fieldMap.get(fieldName);
if (reader != null)
reader.deserialize(in, obj);
else
in.readObject();
}
Object resolve = resolve(in, obj);
if (obj != resolve)
in.setRef(ref, resolve);
return resolve;
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOExceptionWrapper(obj.getClass().getName() + ":" + e, e);
}
}
protected Object resolve(AbstractHessianInput in, Object obj)
throws Exception
{
// if there's a readResolve method, call it
try {
if (_readResolve != null)
return _readResolve.invoke(obj, new Object[0]);
} catch (InvocationTargetException e) {
if (e.getCause() instanceof Exception)
throw (Exception) e.getCause();
else
throw e;
}
return obj;
}
protected Object instantiate()
throws Exception
{
try {
if (_constructor != null)
return _constructor.newInstance(_constructorArgs);
else
return _type.newInstance();
} catch (Exception e) {
throw new HessianProtocolException("'" + _type.getName() + "' could not be instantiated", e);
}
}
/**
* Creates a map of the classes fields.
*/
protected HashMap<String,FieldDeserializer> getFieldMap(Class cl)
{
HashMap<String,FieldDeserializer> fieldMap
= new HashMap<String,FieldDeserializer>();
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;
else if (fieldMap.get(field.getName()) != null)
continue;
// XXX: could parameterize the handler to only deal with public
try {
field.setAccessible(true);
} catch (Throwable e) {
e.printStackTrace();
}
Class<?> type = field.getType();
FieldDeserializer deser;
if (String.class.equals(type))
deser = new StringFieldDeserializer(field);
else if (byte.class.equals(type)) {
deser = new ByteFieldDeserializer(field);
}
else if (short.class.equals(type)) {
deser = new ShortFieldDeserializer(field);
}
else if (int.class.equals(type)) {
deser = new IntFieldDeserializer(field);
}
else if (long.class.equals(type)) {
deser = new LongFieldDeserializer(field);
}
else if (float.class.equals(type)) {
deser = new FloatFieldDeserializer(field);
}
else if (double.class.equals(type)) {
deser = new DoubleFieldDeserializer(field);
}
else if (boolean.class.equals(type)) {
deser = new BooleanFieldDeserializer(field);
}
else if (java.sql.Date.class.equals(type)) {
deser = new SqlDateFieldDeserializer(field);
}
else if (java.sql.Timestamp.class.equals(type)) {
deser = new SqlTimestampFieldDeserializer(field);
}
else if (java.sql.Time.class.equals(type)) {
deser = new SqlTimeFieldDeserializer(field);
}
else {
deser = new ObjectFieldDeserializer(field);
}
fieldMap.put(field.getName(), deser);
}
}
return fieldMap;
}
/**
* Creates a map of the classes fields.
*/
protected static Object getParamArg(Class<?> cl)
{
if (! cl.isPrimitive())
return null;
else if (boolean.class.equals(cl))
return Boolean.FALSE;
else if (byte.class.equals(cl))
return new Byte((byte) 0);
else if (short.class.equals(cl))
return new Short((short) 0);
else if (char.class.equals(cl))
return new Character((char) 0);
else if (int.class.equals(cl))
return Integer.valueOf(0);
else if (long.class.equals(cl))
return Long.valueOf(0);
else if (float.class.equals(cl))
return Float.valueOf(0);
else if (double.class.equals(cl))
return Double.valueOf(0);
else
throw new UnsupportedOperationException();
}
abstract static class FieldDeserializer {
abstract void deserialize(AbstractHessianInput in, Object obj)
throws IOException;
}
static class NullFieldDeserializer {
static NullFieldDeserializer DESER = new NullFieldDeserializer();
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
in.readObject();
}
}
static class ObjectFieldDeserializer extends FieldDeserializer {
private final Field _field;
ObjectFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
Object value = null;
try {
value = in.readObject(_field.getType());
_field.set(obj, value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class BooleanFieldDeserializer extends FieldDeserializer {
private final Field _field;
BooleanFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
boolean value = false;
try {
value = in.readBoolean();
_field.setBoolean(obj, value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class ByteFieldDeserializer extends FieldDeserializer {
private final Field _field;
ByteFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
int value = 0;
try {
value = in.readInt();
_field.setByte(obj, (byte) value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class ShortFieldDeserializer extends FieldDeserializer {
private final Field _field;
ShortFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
int value = 0;
try {
value = in.readInt();
_field.setShort(obj, (short) value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class IntFieldDeserializer extends FieldDeserializer {
private final Field _field;
IntFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
int value = 0;
try {
value = in.readInt();
_field.setInt(obj, value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class LongFieldDeserializer extends FieldDeserializer {
private final Field _field;
LongFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
long value = 0;
try {
value = in.readLong();
_field.setLong(obj, value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class FloatFieldDeserializer extends FieldDeserializer {
private final Field _field;
FloatFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
double value = 0;
try {
value = in.readDouble();
_field.setFloat(obj, (float) value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class DoubleFieldDeserializer extends FieldDeserializer {
private final Field _field;
DoubleFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
double value = 0;
try {
value = in.readDouble();
_field.setDouble(obj, value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class StringFieldDeserializer extends FieldDeserializer {
private final Field _field;
StringFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
String value = null;
try {
value = in.readString();
_field.set(obj, value);
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class SqlDateFieldDeserializer extends FieldDeserializer {
private final Field _field;
SqlDateFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
java.sql.Date value = null;
try {
java.util.Date date = (java.util.Date) in.readObject();
if (date != null) {
value = new java.sql.Date(date.getTime());
_field.set(obj, value);
}
else {
_field.set(obj, null);
}
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class SqlTimestampFieldDeserializer extends FieldDeserializer {
private final Field _field;
SqlTimestampFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
java.sql.Timestamp value = null;
try {
java.util.Date date = (java.util.Date) in.readObject();
if (date != null) {
value = new java.sql.Timestamp(date.getTime());
_field.set(obj, value);
}
else {
_field.set(obj, null);
}
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static class SqlTimeFieldDeserializer extends FieldDeserializer {
private final Field _field;
SqlTimeFieldDeserializer(Field field)
{
_field = field;
}
void deserialize(AbstractHessianInput in, Object obj)
throws IOException
{
java.sql.Time value = null;
try {
java.util.Date date = (java.util.Date) in.readObject();
if (date != null) {
value = new java.sql.Time(date.getTime());
_field.set(obj, value);
}
else {
_field.set(obj, null);
}
} catch (Exception e) {
logDeserializeError(_field, obj, value, e);
}
}
}
static void logDeserializeError(Field field, Object obj, Object value,
Throwable e)
throws IOException
{
String fieldName = (field.getDeclaringClass().getName()
+ "." + field.getName());
if (e instanceof HessianFieldException)
throw (HessianFieldException) e;
else if (e instanceof IOException)
throw new HessianFieldException(fieldName + ": " + e.getMessage(), e);
if (value != null)
throw new HessianFieldException(fieldName + ": " + value.getClass().getName() + " (" + value + ")"
+ " cannot be assigned to '" + field.getType().getName() + "'", e);
else
throw new HessianFieldException(fieldName + ": " + field.getType().getName() + " cannot be assigned from null", e);
}
}