2000-05-20 01:55:34 +08:00
|
|
|
/* ObjectStreamClass.java -- Class used to write class information
|
|
|
|
about serialized objects.
|
2000-07-28 07:57:07 +08:00
|
|
|
Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
|
2000-05-20 01:55:34 +08:00
|
|
|
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
|
|
it under the terms of the GNU General Public License as published by
|
|
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
|
|
any later version.
|
|
|
|
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
General Public License for more details.
|
|
|
|
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
|
02111-1307 USA.
|
|
|
|
|
|
|
|
As a special exception, if you link this library with other files to
|
|
|
|
produce an executable, this library does not by itself cause the
|
|
|
|
resulting executable to be covered by the GNU General Public License.
|
|
|
|
This exception does not however invalidate any other reasons why the
|
|
|
|
executable file might be covered by the GNU General Public License. */
|
|
|
|
|
|
|
|
|
|
|
|
package java.io;
|
|
|
|
|
|
|
|
import java.lang.reflect.Constructor;
|
|
|
|
import java.lang.reflect.Field;
|
|
|
|
import java.lang.reflect.Member;
|
|
|
|
import java.lang.reflect.Method;
|
|
|
|
import java.lang.reflect.Modifier;
|
|
|
|
import java.security.DigestOutputStream;
|
|
|
|
import java.security.MessageDigest;
|
|
|
|
import java.security.NoSuchAlgorithmException;
|
2000-06-28 19:24:05 +08:00
|
|
|
import java.security.Security;
|
2000-05-20 01:55:34 +08:00
|
|
|
import java.util.Arrays;
|
|
|
|
import java.util.Comparator;
|
|
|
|
import java.util.Hashtable;
|
|
|
|
import java.util.Vector;
|
|
|
|
import gnu.java.io.NullOutputStream;
|
|
|
|
import gnu.java.lang.reflect.TypeSignature;
|
2000-06-28 19:24:05 +08:00
|
|
|
import gnu.java.security.provider.Gnu;
|
2000-05-20 01:55:34 +08:00
|
|
|
|
|
|
|
|
|
|
|
public class ObjectStreamClass implements Serializable
|
|
|
|
{
|
|
|
|
/**
|
|
|
|
Returns the <code>ObjectStreamClass</code> for <code>cl</code>.
|
|
|
|
If <code>cl</code> is null, or is not <code>Serializable</code>,
|
2000-07-28 07:57:07 +08:00
|
|
|
null is returned. <code>ObjectStreamClass</code>'s are memorized;
|
2000-05-20 01:55:34 +08:00
|
|
|
later calls to this method with the same class will return the
|
|
|
|
same <code>ObjectStreamClass</code> object and no recalculation
|
|
|
|
will be done.
|
|
|
|
|
|
|
|
@see java.io.Serializable
|
|
|
|
*/
|
|
|
|
public static ObjectStreamClass lookup (Class cl)
|
|
|
|
{
|
|
|
|
if (cl == null)
|
|
|
|
return null;
|
2000-07-28 07:57:07 +08:00
|
|
|
if (! (Serializable.class).isAssignableFrom (cl))
|
|
|
|
return null;
|
2000-05-20 01:55:34 +08:00
|
|
|
|
|
|
|
ObjectStreamClass osc = (ObjectStreamClass)classLookupTable.get (cl);
|
|
|
|
|
|
|
|
if (osc != null)
|
|
|
|
return osc;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
osc = new ObjectStreamClass (cl);
|
|
|
|
classLookupTable.put (cl, osc);
|
|
|
|
return osc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
Returns the name of the class that this
|
|
|
|
<code>ObjectStreamClass</code> represents.
|
|
|
|
*/
|
|
|
|
public String getName ()
|
|
|
|
{
|
|
|
|
return name;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
Returns the class that this <code>ObjectStreamClass</code>
|
|
|
|
represents. Null could be returned if this
|
|
|
|
<code>ObjectStreamClass</code> was read from an
|
|
|
|
<code>ObjectInputStream</code> and the class it represents cannot
|
|
|
|
be found or loaded.
|
|
|
|
|
|
|
|
@see java.io.ObjectInputStream
|
|
|
|
*/
|
|
|
|
public Class forClass ()
|
|
|
|
{
|
|
|
|
return clazz;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
Returns the serial version stream-unique identifier for the class
|
|
|
|
represented by this <code>ObjectStreamClass</code>. This SUID is
|
|
|
|
either defined by the class as <code>static final long
|
|
|
|
serialVersionUID</code> or is calculated as specified in
|
|
|
|
Javasoft's "Object Serialization Specification" XXX: add reference
|
|
|
|
*/
|
|
|
|
public long getSerialVersionUID ()
|
|
|
|
{
|
|
|
|
return uid;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns the serializable (non-static and non-transient) Fields
|
|
|
|
// of the class represented by this ObjectStreamClass. The Fields
|
|
|
|
// are sorted by name.
|
|
|
|
// XXX doc
|
|
|
|
public ObjectStreamField[] getFields ()
|
|
|
|
{
|
|
|
|
ObjectStreamField[] copy = new ObjectStreamField[ fields.length ];
|
|
|
|
System.arraycopy (fields, 0, copy, 0, fields.length);
|
|
|
|
return copy;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// XXX doc
|
|
|
|
// Can't do binary search since fields is sorted by name and
|
|
|
|
// primitiveness.
|
|
|
|
public ObjectStreamField getField (String name)
|
|
|
|
{
|
|
|
|
for (int i=0; i < fields.length; i++)
|
|
|
|
if (fields[i].getName ().equals (name))
|
|
|
|
return fields[i];
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
Returns a textual representation of this
|
|
|
|
<code>ObjectStreamClass</code> object including the name of the
|
|
|
|
class it represents as well as that class's serial version
|
|
|
|
stream-unique identifier.
|
|
|
|
|
|
|
|
@see getSerialVersionUID ()
|
|
|
|
@see getName ()
|
|
|
|
*/
|
|
|
|
public String toString ()
|
|
|
|
{
|
|
|
|
return "java.io.ObjectStreamClass< " + name + ", " + uid + " >";
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns true iff the class that this ObjectStreamClass represents
|
|
|
|
// has the following method:
|
|
|
|
//
|
|
|
|
// private void writeObject (ObjectOutputStream)
|
|
|
|
//
|
|
|
|
// This method is used by the class to override default
|
2000-07-28 07:57:07 +08:00
|
|
|
// serialization behavior.
|
2000-05-20 01:55:34 +08:00
|
|
|
boolean hasWriteMethod ()
|
|
|
|
{
|
|
|
|
return (flags & ObjectStreamConstants.SC_WRITE_METHOD) != 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns true iff the class that this ObjectStreamClass represents
|
|
|
|
// implements Serializable but does *not* implement Externalizable.
|
|
|
|
boolean isSerializable ()
|
|
|
|
{
|
|
|
|
return (flags & ObjectStreamConstants.SC_SERIALIZABLE) != 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns true iff the class that this ObjectStreamClass represents
|
|
|
|
// implements Externalizable.
|
|
|
|
boolean isExternalizable ()
|
|
|
|
{
|
|
|
|
return (flags & ObjectStreamConstants.SC_EXTERNALIZABLE) != 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns the <code>ObjectStreamClass</code> that represents the
|
|
|
|
// class that is the superclass of the class this
|
|
|
|
// <code>ObjectStreamClass</cdoe> represents. If the superclass is
|
|
|
|
// not Serializable, null is returned.
|
|
|
|
ObjectStreamClass getSuper ()
|
|
|
|
{
|
|
|
|
return superClass;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// returns an array of ObjectStreamClasses that represent the super
|
|
|
|
// classes of CLAZZ and CLAZZ itself in order from most super to
|
|
|
|
// CLAZZ. ObjectStreamClass[0] is the highest superclass of CLAZZ
|
|
|
|
// that is serializable.
|
|
|
|
static ObjectStreamClass[] getObjectStreamClasses (Class clazz)
|
|
|
|
{
|
|
|
|
ObjectStreamClass osc = ObjectStreamClass.lookup (clazz);
|
|
|
|
|
|
|
|
ObjectStreamClass[] ret_val;
|
|
|
|
|
|
|
|
if (osc == null)
|
|
|
|
return new ObjectStreamClass[0];
|
|
|
|
else
|
|
|
|
{
|
|
|
|
Vector oscs = new Vector ();
|
|
|
|
|
|
|
|
while (osc != null)
|
|
|
|
{
|
|
|
|
oscs.addElement (osc);
|
|
|
|
osc = osc.getSuper ();
|
|
|
|
}
|
|
|
|
|
|
|
|
int count = oscs.size ();
|
|
|
|
ObjectStreamClass[] sorted_oscs = new ObjectStreamClass[ count ];
|
|
|
|
|
|
|
|
for (int i = count - 1; i >= 0; i--)
|
|
|
|
sorted_oscs[ count - i - 1 ] = (ObjectStreamClass)oscs.elementAt (i);
|
|
|
|
|
|
|
|
return sorted_oscs;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns an integer that consists of bit-flags that indicate
|
|
|
|
// properties of the class represented by this ObjectStreamClass.
|
|
|
|
// The bit-flags that could be present are those defined in
|
|
|
|
// ObjectStreamConstants that begin with `SC_'
|
|
|
|
int getFlags ()
|
|
|
|
{
|
|
|
|
return flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
ObjectStreamClass (String name, long uid, byte flags,
|
|
|
|
ObjectStreamField[] fields)
|
|
|
|
{
|
|
|
|
this.name = name;
|
|
|
|
this.uid = uid;
|
|
|
|
this.flags = flags;
|
|
|
|
this.fields = fields;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void setClass (Class clazz)
|
|
|
|
{
|
|
|
|
this.clazz = clazz;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void setSuperclass (ObjectStreamClass osc)
|
|
|
|
{
|
|
|
|
superClass = osc;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void calculateOffsets ()
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
ObjectStreamField field;
|
|
|
|
primFieldSize = 0;
|
|
|
|
int fcount = fields.length;
|
|
|
|
for (i = 0; i < fcount; ++ i)
|
|
|
|
{
|
|
|
|
field = fields[i];
|
|
|
|
|
|
|
|
if (! field.isPrimitive ())
|
|
|
|
break;
|
|
|
|
|
|
|
|
field.setOffset (primFieldSize);
|
|
|
|
switch (field.getTypeCode ())
|
|
|
|
{
|
|
|
|
case 'B':
|
|
|
|
case 'Z':
|
|
|
|
++ primFieldSize;
|
|
|
|
break;
|
|
|
|
case 'C':
|
|
|
|
case 'S':
|
|
|
|
primFieldSize += 2;
|
|
|
|
break;
|
|
|
|
case 'I':
|
|
|
|
case 'F':
|
|
|
|
primFieldSize += 4;
|
|
|
|
break;
|
|
|
|
case 'D':
|
|
|
|
case 'J':
|
|
|
|
primFieldSize += 8;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (objectFieldCount = 0; i < fcount; ++ i)
|
|
|
|
fields[i].setOffset (objectFieldCount++);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
private ObjectStreamClass (Class cl)
|
|
|
|
{
|
|
|
|
uid = 0;
|
|
|
|
flags = 0;
|
|
|
|
|
|
|
|
clazz = cl;
|
|
|
|
name = cl.getName ();
|
|
|
|
setFlags (cl);
|
|
|
|
setFields (cl);
|
|
|
|
setUID (cl);
|
|
|
|
superClass = lookup (cl.getSuperclass ());
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Sets bits in flags according to features of CL.
|
|
|
|
private void setFlags (Class cl)
|
|
|
|
{
|
|
|
|
if ((java.io.Externalizable.class).isAssignableFrom (cl))
|
|
|
|
flags |= ObjectStreamConstants.SC_EXTERNALIZABLE;
|
|
|
|
else if ((java.io.Serializable.class).isAssignableFrom (cl))
|
|
|
|
// only set this bit if CL is NOT Externalizable
|
|
|
|
flags |= ObjectStreamConstants.SC_SERIALIZABLE;
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
|
|
|
Method writeMethod = cl.getDeclaredMethod ("writeObject",
|
|
|
|
writeMethodArgTypes);
|
|
|
|
int modifiers = writeMethod.getModifiers ();
|
|
|
|
|
|
|
|
if (writeMethod.getReturnType () == Void.TYPE
|
|
|
|
&& Modifier.isPrivate (modifiers)
|
|
|
|
&& !Modifier.isStatic (modifiers))
|
|
|
|
flags |= ObjectStreamConstants.SC_WRITE_METHOD;
|
|
|
|
}
|
|
|
|
catch (NoSuchMethodException oh_well)
|
|
|
|
{}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Sets fields to be a sorted array of the serializable fields of
|
|
|
|
// clazz.
|
|
|
|
private void setFields (Class cl)
|
|
|
|
{
|
|
|
|
if (! isSerializable () || isExternalizable ())
|
|
|
|
{
|
|
|
|
fields = NO_FIELDS;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
2000-08-04 08:42:20 +08:00
|
|
|
Field serialPersistentFields
|
|
|
|
= cl.getDeclaredField ("serialPersistentFields");
|
|
|
|
int modifiers = serialPersistentFields.getModifiers ();
|
2000-05-20 01:55:34 +08:00
|
|
|
|
|
|
|
if (Modifier.isStatic (modifiers)
|
|
|
|
&& Modifier.isFinal (modifiers)
|
|
|
|
&& Modifier.isPrivate (modifiers))
|
|
|
|
{
|
2000-08-04 08:42:20 +08:00
|
|
|
fields = getSerialPersistentFields (cl);
|
2000-05-20 01:55:34 +08:00
|
|
|
Arrays.sort (fields);
|
|
|
|
calculateOffsets ();
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
catch (NoSuchFieldException ignore)
|
|
|
|
{}
|
|
|
|
|
|
|
|
int num_good_fields = 0;
|
|
|
|
Field[] all_fields = cl.getDeclaredFields ();
|
|
|
|
|
|
|
|
int modifiers;
|
|
|
|
// set non-serializable fields to null in all_fields
|
|
|
|
for (int i=0; i < all_fields.length; i++)
|
|
|
|
{
|
|
|
|
modifiers = all_fields[i].getModifiers ();
|
|
|
|
if (Modifier.isTransient (modifiers)
|
|
|
|
|| Modifier.isStatic (modifiers))
|
|
|
|
all_fields[i] = null;
|
|
|
|
else
|
|
|
|
num_good_fields++;
|
|
|
|
}
|
|
|
|
|
|
|
|
// make a copy of serializable (non-null) fields
|
|
|
|
fields = new ObjectStreamField[ num_good_fields ];
|
|
|
|
for (int from=0, to=0; from < all_fields.length; from++)
|
|
|
|
if (all_fields[from] != null)
|
|
|
|
{
|
|
|
|
Field f = all_fields[from];
|
|
|
|
fields[to] = new ObjectStreamField (f.getName (), f.getType ());
|
|
|
|
to++;
|
|
|
|
}
|
|
|
|
|
|
|
|
Arrays.sort (fields);
|
|
|
|
calculateOffsets ();
|
|
|
|
}
|
|
|
|
|
2000-07-28 07:57:07 +08:00
|
|
|
// Sets uid to be serial version UID defined by class, or if that
|
2000-05-20 01:55:34 +08:00
|
|
|
// isn't present, calculates value of serial version UID.
|
|
|
|
private void setUID (Class cl)
|
|
|
|
{
|
|
|
|
try
|
|
|
|
{
|
|
|
|
Field suid = cl.getDeclaredField ("serialVersionUID");
|
|
|
|
int modifiers = suid.getModifiers ();
|
|
|
|
|
|
|
|
if (Modifier.isStatic (modifiers)
|
|
|
|
&& Modifier.isFinal (modifiers))
|
|
|
|
{
|
|
|
|
uid = getDefinedSUID (cl);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
catch (NoSuchFieldException ignore)
|
|
|
|
{}
|
|
|
|
|
|
|
|
// cl didn't define serialVersionUID, so we have to compute it
|
|
|
|
try
|
|
|
|
{
|
|
|
|
MessageDigest md = null;
|
|
|
|
DigestOutputStream digest_out = null;
|
|
|
|
DataOutputStream data_out = null;
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
|
|
|
md = MessageDigest.getInstance ("SHA");
|
|
|
|
}
|
|
|
|
catch (NoSuchAlgorithmException e)
|
|
|
|
{
|
2000-06-28 19:24:05 +08:00
|
|
|
// If a provider already provides SHA, use it; otherwise, use this.
|
|
|
|
Gnu gnuProvider = new Gnu();
|
|
|
|
Security.addProvider(gnuProvider);
|
|
|
|
md = MessageDigest.getInstance ("SHA");
|
2000-05-20 01:55:34 +08:00
|
|
|
}
|
|
|
|
|
2000-06-28 19:24:05 +08:00
|
|
|
digest_out = new DigestOutputStream (nullOutputStream, md);
|
|
|
|
data_out = new DataOutputStream (digest_out);
|
2000-05-20 01:55:34 +08:00
|
|
|
data_out.writeUTF (cl.getName ());
|
|
|
|
|
|
|
|
int modifiers = cl.getModifiers ();
|
|
|
|
// just look at interesting bits
|
|
|
|
modifiers = modifiers & (Modifier.ABSTRACT | Modifier.FINAL
|
|
|
|
| Modifier.INTERFACE | Modifier.PUBLIC);
|
|
|
|
data_out.writeInt (modifiers);
|
|
|
|
|
|
|
|
Class[] interfaces = cl.getInterfaces ();
|
|
|
|
Arrays.sort (interfaces, interfaceComparator);
|
|
|
|
for (int i=0; i < interfaces.length; i++)
|
|
|
|
data_out.writeUTF (interfaces[i].getName ());
|
|
|
|
|
|
|
|
|
|
|
|
Field field;
|
|
|
|
Field[] fields = cl.getDeclaredFields ();
|
|
|
|
Arrays.sort (fields, memberComparator);
|
|
|
|
for (int i=0; i < fields.length; i++)
|
|
|
|
{
|
|
|
|
field = fields[i];
|
|
|
|
modifiers = field.getModifiers ();
|
|
|
|
if (Modifier.isPrivate (modifiers)
|
|
|
|
&& (Modifier.isStatic (modifiers)
|
|
|
|
|| Modifier.isTransient (modifiers)))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
data_out.writeUTF (field.getName ());
|
|
|
|
data_out.writeInt (modifiers);
|
|
|
|
data_out.writeUTF (TypeSignature.getEncodingOfClass (field.getType ()));
|
|
|
|
}
|
|
|
|
|
|
|
|
// write class initializer method if present
|
|
|
|
boolean has_init;
|
|
|
|
try
|
|
|
|
{
|
|
|
|
has_init = hasClassInitializer (cl);
|
|
|
|
}
|
|
|
|
catch (NoSuchMethodError e)
|
|
|
|
{
|
|
|
|
has_init = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (has_init)
|
|
|
|
{
|
|
|
|
data_out.writeUTF ("<clinit>");
|
|
|
|
data_out.writeInt (Modifier.STATIC);
|
|
|
|
data_out.writeUTF ("()V");
|
|
|
|
}
|
|
|
|
|
|
|
|
Constructor constructor;
|
|
|
|
Constructor[] constructors = cl.getDeclaredConstructors ();
|
|
|
|
Arrays.sort (constructors, memberComparator);
|
|
|
|
for (int i=0; i < constructors.length; i++)
|
|
|
|
{
|
|
|
|
constructor = constructors[i];
|
|
|
|
modifiers = constructor.getModifiers ();
|
|
|
|
if (Modifier.isPrivate (modifiers))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
data_out.writeUTF ("<init>");
|
|
|
|
data_out.writeInt (modifiers);
|
|
|
|
|
|
|
|
// the replacement of '/' with '.' was needed to make computed
|
|
|
|
// SUID's agree with those computed by JDK
|
|
|
|
data_out.writeUTF (
|
|
|
|
TypeSignature.getEncodingOfConstructor (constructor).replace ('/','.'));
|
|
|
|
}
|
|
|
|
|
|
|
|
Method method;
|
|
|
|
Method[] methods = cl.getDeclaredMethods ();
|
|
|
|
Arrays.sort (methods, memberComparator);
|
|
|
|
for (int i=0; i < methods.length; i++)
|
|
|
|
{
|
|
|
|
method = methods[i];
|
|
|
|
modifiers = method.getModifiers ();
|
|
|
|
if (Modifier.isPrivate (modifiers))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
data_out.writeUTF (method.getName ());
|
|
|
|
data_out.writeInt (modifiers);
|
|
|
|
|
|
|
|
// the replacement of '/' with '.' was needed to make computed
|
|
|
|
// SUID's agree with those computed by JDK
|
|
|
|
data_out.writeUTF (
|
|
|
|
TypeSignature.getEncodingOfMethod (method).replace ('/', '.'));
|
|
|
|
}
|
|
|
|
|
|
|
|
data_out.close ();
|
2000-06-28 19:24:05 +08:00
|
|
|
byte[] sha = md.digest ();
|
2000-05-20 01:55:34 +08:00
|
|
|
long result = 0;
|
|
|
|
int len = sha.length < 8 ? sha.length : 8;
|
|
|
|
for (int i=0; i < len; i++)
|
|
|
|
result += (long)(sha[i] & 0xFF) << (8 * i);
|
|
|
|
|
|
|
|
uid = result;
|
|
|
|
}
|
|
|
|
catch (NoSuchAlgorithmException e)
|
|
|
|
{
|
|
|
|
throw new RuntimeException ("The SHA algorithm was not found to use in computing the Serial Version UID for class "
|
|
|
|
+ cl.getName ());
|
|
|
|
}
|
|
|
|
catch (IOException ioe)
|
|
|
|
{
|
|
|
|
throw new RuntimeException (ioe.getMessage ());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns the value of CLAZZ's final static long field named
|
|
|
|
// `serialVersionUID'.
|
|
|
|
private long getDefinedSUID (Class clazz)
|
|
|
|
{
|
|
|
|
long l = 0;
|
|
|
|
try
|
|
|
|
{
|
|
|
|
// Use getDeclaredField rather than getField, since serialVersionUID
|
|
|
|
// may not be public AND we only want the serialVersionUID of this
|
|
|
|
// class, not a superclass or interface.
|
|
|
|
Field f = clazz.getDeclaredField ("serialVersionUID");
|
|
|
|
l = f.getLong (null);
|
|
|
|
}
|
|
|
|
catch (java.lang.NoSuchFieldException e)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
catch (java.lang.IllegalAccessException e)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
return l;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Returns the value of CLAZZ's private static final field named
|
2000-08-04 08:42:20 +08:00
|
|
|
// `serialPersistentFields'.
|
|
|
|
private ObjectStreamField[] getSerialPersistentFields (Class clazz)
|
2000-05-20 01:55:34 +08:00
|
|
|
{
|
|
|
|
ObjectStreamField[] o = null;
|
|
|
|
try
|
|
|
|
{
|
|
|
|
// Use getDeclaredField rather than getField for the same reason
|
|
|
|
// as above in getDefinedSUID.
|
2000-08-04 08:42:20 +08:00
|
|
|
Field f = clazz.getDeclaredField ("getSerialPersistentFields");
|
2000-05-20 01:55:34 +08:00
|
|
|
o = (ObjectStreamField[])f.get (null);
|
|
|
|
}
|
|
|
|
catch (java.lang.NoSuchFieldException e)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
catch (java.lang.IllegalAccessException e)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
return o;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Returns true if CLAZZ has a static class initializer
|
|
|
|
// (a.k.a. <clinit>).
|
|
|
|
//
|
|
|
|
// A NoSuchMethodError is raised if CLAZZ has no such method.
|
|
|
|
private static boolean hasClassInitializer (Class clazz)
|
|
|
|
throws java.lang.NoSuchMethodError
|
|
|
|
{
|
|
|
|
Method m = null;
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
|
|
|
Class classArgs[] = {};
|
2000-07-28 07:57:07 +08:00
|
|
|
m = clazz.getDeclaredMethod ("<clinit>", classArgs);
|
2000-05-20 01:55:34 +08:00
|
|
|
}
|
|
|
|
catch (java.lang.NoSuchMethodException e)
|
|
|
|
{
|
|
|
|
throw new java.lang.NoSuchMethodError ();
|
|
|
|
}
|
|
|
|
|
|
|
|
return m != null;
|
|
|
|
}
|
|
|
|
|
|
|
|
public static final ObjectStreamField[] NO_FIELDS = {};
|
|
|
|
|
|
|
|
private static Hashtable classLookupTable = new Hashtable ();
|
|
|
|
private static final NullOutputStream nullOutputStream = new NullOutputStream ();
|
|
|
|
private static final Comparator interfaceComparator = new InterfaceComparator ();
|
|
|
|
private static final Comparator memberComparator = new MemberComparator ();
|
|
|
|
private static final
|
|
|
|
Class[] writeMethodArgTypes = { java.io.ObjectOutputStream.class };
|
|
|
|
|
|
|
|
private ObjectStreamClass superClass;
|
|
|
|
private Class clazz;
|
|
|
|
private String name;
|
|
|
|
private long uid;
|
|
|
|
private byte flags;
|
|
|
|
|
|
|
|
// this field is package protected so that ObjectInputStream and
|
|
|
|
// ObjectOutputStream can access it directly
|
|
|
|
ObjectStreamField[] fields;
|
|
|
|
|
|
|
|
// these are accessed by ObjectIn/OutputStream
|
|
|
|
int primFieldSize = -1; // -1 if not yet calculated
|
|
|
|
int objectFieldCount;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// interfaces are compared only by name
|
|
|
|
class InterfaceComparator implements Comparator
|
|
|
|
{
|
|
|
|
public int compare (Object o1, Object o2)
|
|
|
|
{
|
|
|
|
return ((Class)o1).getName ().compareTo (((Class)o2).getName ());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Members (Methods and Constructors) are compared first by name,
|
|
|
|
// conflicts are resolved by comparing type signatures
|
|
|
|
class MemberComparator implements Comparator
|
|
|
|
{
|
|
|
|
public int compare (Object o1, Object o2)
|
|
|
|
{
|
|
|
|
Member m1 = (Member)o1;
|
|
|
|
Member m2 = (Member)o2;
|
|
|
|
|
|
|
|
int comp = m1.getName ().compareTo (m2.getName ());
|
|
|
|
|
|
|
|
if (comp == 0)
|
|
|
|
return TypeSignature.getEncodingOfMember (m1).
|
|
|
|
compareTo (TypeSignature.getEncodingOfMember (m2));
|
|
|
|
else
|
|
|
|
return comp;
|
|
|
|
}
|
|
|
|
}
|