/*
* @(#)DynamicMethodMarshallerImpl.java 1.12 04/06/21
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.sun.corba.se.impl.presentation.rmi ;
import java.io.Serializable ;
import java.io.Externalizable ;
import javax.rmi.PortableRemoteObject ;
import javax.rmi.CORBA.Util ;
import org.omg.CORBA.portable.IDLEntity ;
import org.omg.CORBA_2_3.portable.InputStream ;
import org.omg.CORBA_2_3.portable.OutputStream ;
import org.omg.CORBA.portable.ApplicationException ;
import java.lang.reflect.Method ;
import java.rmi.RemoteException ;
import com.sun.corba.se.spi.orb.ORB ;
import com.sun.corba.se.spi.presentation.rmi.DynamicMethodMarshaller ;
public class DynamicMethodMarshallerImpl implements DynamicMethodMarshaller
{
Method method ;
ExceptionHandler ehandler ;
boolean hasArguments = true ;
boolean hasVoidResult = true ;
boolean needsArgumentCopy ; // true if copyObjects call needs for args
boolean needsResultCopy ; // true if copyObject call needs for result
ReaderWriter[] argRWs = null ;
ReaderWriter resultRW = null ;
private static boolean isAnyClass( Class cls )
{
return cls.equals( Object.class ) || cls.equals( Serializable.class ) ||
cls.equals( Externalizable.class ) ;
}
// Assume that cls is not Remote, !isAnyClass(cls), and
// !org.omg.CORBA.Object.class.isAssignableFrom( cls ).
// Then return whether cls is an RMI-IIOP abstract interface.
private static boolean isAbstractInterface( Class cls )
{
// Either cls is an interface that extends IDLEntity, or else
// cls does not extend java.rmi.Remote and all of its methods
// throw RemoteException.
if (IDLEntity.class.isAssignableFrom( cls ))
return cls.isInterface() ;
else
return cls.isInterface() && allMethodsThrowRemoteException( cls ) ;
}
private static boolean allMethodsThrowRemoteException( Class cls )
{
Method[] methods = cls.getMethods() ;
// Check that all methods (other than those declared in java.lang.Object)
// throw an exception that is a subclass of RemoteException.
for (int ctr=0; ctr<methods.length; ctr++) {
Method method = methods[ctr] ;
if (method.getDeclaringClass() != Object.class)
if (!throwsRemote( method ))
return false ;
}
return true ;
}
private static boolean throwsRemote( Method method )
{
Class[] exceptionTypes = method.getExceptionTypes() ;
// Check that some exceptionType is a subclass of RemoteException
for (int ctr=0; ctr<exceptionTypes.length; ctr++) {
Class exceptionType = exceptionTypes[ctr] ;
if (java.rmi.RemoteException.class.isAssignableFrom( exceptionType ))
return true ;
}
return false ;
}
public interface ReaderWriter
{
Object read( InputStream is ) ;
void write( OutputStream os, Object value ) ;
}
abstract static class ReaderWriterBase implements ReaderWriter
{
String name ;
public ReaderWriterBase( String name )
{
this.name = name ;
}
public String toString()
{
return "ReaderWriter[" + name + "]" ;
}
}
private static ReaderWriter booleanRW = new ReaderWriterBase( "boolean" )
{
public Object read( InputStream is )
{
boolean value = is.read_boolean() ;
return new Boolean( value ) ;
}
public void write( OutputStream os, Object value )
{
Boolean val = (Boolean)value ;
os.write_boolean( val.booleanValue() ) ;
}
} ;
private static ReaderWriter byteRW = new ReaderWriterBase( "byte" )
{
public Object read( InputStream is )
{
byte value = is.read_octet() ;
return new Byte( value ) ;
}
public void write( OutputStream os, Object value )
{
Byte val = (Byte)value ;
os.write_octet( val.byteValue() ) ;
}
} ;
private static ReaderWriter charRW = new ReaderWriterBase( "char" )
{
public Object read( InputStream is )
{
char value = is.read_wchar() ;
return new Character( value ) ;
}
public void write( OutputStream os, Object value )
{
Character val = (Character)value ;
os.write_wchar( val.charValue() ) ;
}
} ;
private static ReaderWriter shortRW = new ReaderWriterBase( "short" )
{
public Object read( InputStream is )
{
short value = is.read_short() ;
return new Short( value ) ;
}
public void write( OutputStream os, Object value )
{
Short val = (Short)value ;
os.write_short( val.shortValue() ) ;
}
} ;
private static ReaderWriter intRW = new ReaderWriterBase( "int" )
{
public Object read( InputStream is )
{
int value = is.read_long() ;
return new Integer( value ) ;
}
public void write( OutputStream os, Object value )
{
Integer val = (Integer)value ;
os.write_long( val.intValue() ) ;
}
} ;
private static ReaderWriter longRW = new ReaderWriterBase( "long" )
{
public Object read( InputStream is )
{
long value = is.read_longlong() ;
return new Long( value ) ;
}
public void write( OutputStream os, Object value )
{
Long val = (Long)value ;
os.write_longlong( val.longValue() ) ;
}
} ;
private static ReaderWriter floatRW = new ReaderWriterBase( "float" )
{
public Object read( InputStream is )
{
float value = is.read_float() ;
return new Float( value ) ;
}
public void write( OutputStream os, Object value )
{
Float val = (Float)value ;
os.write_float( val.floatValue() ) ;
}
} ;
private static ReaderWriter doubleRW = new ReaderWriterBase( "double" )
{
public Object read( InputStream is )
{
double value = is.read_double() ;
return new Double( value ) ;
}
public void write( OutputStream os, Object value )
{
Double val = (Double)value ;
os.write_double( val.doubleValue() ) ;
}
} ;
private static ReaderWriter corbaObjectRW = new ReaderWriterBase(
"org.omg.CORBA.Object" )
{
public Object read( InputStream is )
{
return is.read_Object() ;
}
public void write( OutputStream os, Object value )
{
os.write_Object( (org.omg.CORBA.Object)value ) ;
}
} ;
private static ReaderWriter anyRW = new ReaderWriterBase( "any" )
{
public Object read( InputStream is )
{
return Util.readAny(is) ;
}
public void write( OutputStream os, Object value )
{
Util.writeAny( os, value ) ;
}
} ;
private static ReaderWriter abstractInterfaceRW = new ReaderWriterBase(
"abstract_interface" )
{
public Object read( InputStream is )
{
return is.read_abstract_interface() ;
}
public void write( OutputStream os, Object value )
{
Util.writeAbstractObject( os, value ) ;
}
} ;
public static ReaderWriter makeReaderWriter( final Class cls )
{
if (cls.equals( boolean.class ))
return booleanRW ;
else if (cls.equals( byte.class ))
return byteRW ;
else if (cls.equals( char.class ))
return charRW ;
else if (cls.equals( short.class ))
return shortRW ;
else if (cls.equals( int.class ))
return intRW ;
else if (cls.equals( long.class ))
return longRW ;
else if (cls.equals( float.class ))
return floatRW ;
else if (cls.equals( double.class ))
return doubleRW ;
else if (java.rmi.Remote.class.isAssignableFrom( cls ))
return new ReaderWriterBase( "remote(" + cls.getName() + ")" )
{
public Object read( InputStream is )
{
return PortableRemoteObject.narrow( is.read_Object(),
cls ) ;
}
public void write( OutputStream os, Object value )
{
Util.writeRemoteObject( os, value ) ;
}
} ;
else if (cls.equals(org.omg.CORBA.Object.class))
return corbaObjectRW ;
else if (org.omg.CORBA.Object.class.isAssignableFrom( cls ))
return new ReaderWriterBase( "org.omg.CORBA.Object(" +
cls.getName() + ")" )
{
public Object read( InputStream is )
{
return is.read_Object(cls) ;
}
public void write( OutputStream os, Object value )
{
os.write_Object( (org.omg.CORBA.Object)value ) ;
}
} ;
else if (isAnyClass(cls))
return anyRW ;
else if (isAbstractInterface(cls))
return abstractInterfaceRW ;
// For anything else, just read it as a value type.
return new ReaderWriterBase( "value(" + cls.getName() + ")" )
{
public Object read( InputStream is )
{
return is.read_value(cls) ;
}
public void write( OutputStream os, Object value )
{
os.write_value( (Serializable)value, cls ) ;
}
} ;
}
public DynamicMethodMarshallerImpl( Method method )
{
this.method = method ;
ehandler = new ExceptionHandlerImpl( method.getExceptionTypes() ) ;
needsArgumentCopy = false ;
Class[] argTypes = method.getParameterTypes() ;
hasArguments = argTypes.length > 0 ;
if (hasArguments) {
argRWs = new ReaderWriter[ argTypes.length ] ;
for (int ctr=0; ctr<argTypes.length; ctr++ ) {
// This could be further optimized to avoid
// copying if argTypes contains at most one
// immutable object type.
if (!argTypes[ctr].isPrimitive())
needsArgumentCopy = true ;
argRWs[ctr] = makeReaderWriter( argTypes[ctr] ) ;
}
}
Class resultType = method.getReturnType() ;
needsResultCopy = false ;
hasVoidResult = resultType.equals( void.class ) ;
if (!hasVoidResult) {
needsResultCopy = !resultType.isPrimitive() ;
resultRW = makeReaderWriter( resultType ) ;
}
}
public Method getMethod()
{
return method ;
}
public Object[] copyArguments( Object[] args,
ORB orb ) throws RemoteException
{
if (needsArgumentCopy)
return Util.copyObjects( args, orb ) ;
else
return args ;
}
public Object[] readArguments( InputStream is )
{
Object[] result = null ;
if (hasArguments) {
result = new Object[ argRWs.length ] ;
for (int ctr=0; ctr<argRWs.length; ctr++ )
result[ctr] = argRWs[ctr].read( is ) ;
}
return result ;
}
public void writeArguments( OutputStream os, Object[] args )
{
if (hasArguments) {
if (args.length != argRWs.length)
throw new IllegalArgumentException( "Expected " + argRWs.length +
" arguments, but got " + args.length + " arguments." ) ;
for (int ctr=0; ctr<argRWs.length; ctr++ )
argRWs[ctr].write( os, args[ctr] ) ;
}
}
public Object copyResult( Object result, ORB orb ) throws RemoteException
{
if (needsResultCopy)
return Util.copyObject( result, orb ) ;
else
return result ;
}
public Object readResult( InputStream is )
{
if (hasVoidResult)
return null ;
else
return resultRW.read( is ) ;
}
public void writeResult( OutputStream os, Object result )
{
if (!hasVoidResult)
resultRW.write( os, result ) ;
}
public boolean isDeclaredException( Throwable thr )
{
return ehandler.isDeclaredException( thr.getClass() ) ;
}
public void writeException( OutputStream os, Exception ex )
{
ehandler.writeException( os, ex ) ;
}
public Exception readException( ApplicationException ae )
{
return ehandler.readException( ae ) ;
}
}
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