/* 
 *  orbit-name-server : a CORBA CosNaming server
 *
 *  Copyright (C) 1998 Elliot Lee, Sebastian Wilhelmi
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "CosNaming.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>

/*** App-specific servant structures ***/

typedef struct {
  CosNaming_NameComponent nc;
  CORBA_Object obj;
  gint refcount;
  CORBA_boolean is_subctx;
} RegisteredName;

typedef struct {
  POA_CosNaming_NamingContext servant;
  PortableServer_POA poa;
  PortableServer_ObjectId *oid;

  GHashTable *names;
  CORBA_Object objref;
} impl_POA_CosNaming_NamingContext;

typedef struct {
  POA_CosNaming_BindingIterator servant;
  PortableServer_POA poa;
  PortableServer_ObjectId *oid;

  GList *items;
} impl_POA_CosNaming_BindingIterator;

/*** Implementation stub prototypes ***/

static void impl_CosNaming_NamingContext__destroy(impl_POA_CosNaming_NamingContext * servant,
						  CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_bind(impl_POA_CosNaming_NamingContext * servant,
				  CosNaming_Name * n,
				  CORBA_Object obj,
				  CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_rebind(impl_POA_CosNaming_NamingContext * servant,
				    CosNaming_Name * n,
				    CORBA_Object obj,
				    CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_bind_context(impl_POA_CosNaming_NamingContext * servant,
					  CosNaming_Name * n,
					  CosNaming_NamingContext nc,
					  CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_rebind_context(impl_POA_CosNaming_NamingContext * servant,
					    CosNaming_Name * n,
					    CosNaming_NamingContext nc,
					    CORBA_Environment * ev);

CORBA_Object
impl_CosNaming_NamingContext_resolve(impl_POA_CosNaming_NamingContext * servant,
				     CosNaming_Name * n,
				     CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_unbind(impl_POA_CosNaming_NamingContext * servant,
				    CosNaming_Name * n,
				    CORBA_Environment * ev);

CosNaming_NamingContext
impl_CosNaming_NamingContext_new_context(impl_POA_CosNaming_NamingContext * servant,
					 CORBA_Environment * ev);

CosNaming_NamingContext
impl_CosNaming_NamingContext_bind_new_context(impl_POA_CosNaming_NamingContext * servant,
					      CosNaming_Name * n,
					      CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_destroy(impl_POA_CosNaming_NamingContext * servant,
				     CORBA_Environment * ev);

void
impl_CosNaming_NamingContext_list(impl_POA_CosNaming_NamingContext * servant,
				  CORBA_unsigned_long how_many,
				  CosNaming_BindingList ** bl,
				  CosNaming_BindingIterator * bi,
				  CORBA_Environment * ev);

static void impl_CosNaming_BindingIterator__destroy(impl_POA_CosNaming_BindingIterator * servant,
						    CORBA_Environment * ev);

CORBA_boolean
impl_CosNaming_BindingIterator_next_one(impl_POA_CosNaming_BindingIterator * servant,
					CosNaming_Binding ** b,
					CORBA_Environment * ev);

CORBA_boolean
impl_CosNaming_BindingIterator_next_n(impl_POA_CosNaming_BindingIterator * servant,
				      CORBA_unsigned_long how_many,
				      CosNaming_BindingList ** bl,
				      CORBA_Environment * ev);

void
impl_CosNaming_BindingIterator_destroy(impl_POA_CosNaming_BindingIterator * servant,
				       CORBA_Environment * ev);

/*** epv structures ***/

static PortableServer_ServantBase__epv impl_CosNaming_NamingContext_base_epv =
{
  NULL,			/* _private data */
  (gpointer) & impl_CosNaming_NamingContext__destroy,	/* finalize routine */
  NULL,			/* default_POA routine */
};
static POA_CosNaming_NamingContext__epv impl_CosNaming_NamingContext_epv =
{
  NULL,			/* _private */

  (gpointer) & impl_CosNaming_NamingContext_bind,
  (gpointer) & impl_CosNaming_NamingContext_rebind,
  (gpointer) & impl_CosNaming_NamingContext_bind_context,
  (gpointer) & impl_CosNaming_NamingContext_rebind_context,
  (gpointer) & impl_CosNaming_NamingContext_resolve,
  (gpointer) & impl_CosNaming_NamingContext_unbind,
  (gpointer) & impl_CosNaming_NamingContext_new_context,
  (gpointer) & impl_CosNaming_NamingContext_bind_new_context,
  (gpointer) & impl_CosNaming_NamingContext_destroy,
  (gpointer) & impl_CosNaming_NamingContext_list,
};
static PortableServer_ServantBase__epv impl_CosNaming_BindingIterator_base_epv =
{
  NULL,			/* _private data */
  (gpointer) & impl_CosNaming_BindingIterator__destroy,	/* finalize routine */
  NULL,			/* default_POA routine */
};
static POA_CosNaming_BindingIterator__epv impl_CosNaming_BindingIterator_epv =
{
  NULL,			/* _private */
  (gpointer) & impl_CosNaming_BindingIterator_next_one,
  (gpointer) & impl_CosNaming_BindingIterator_next_n,
  (gpointer) & impl_CosNaming_BindingIterator_destroy,
};

/*** vepv structures ***/

static POA_CosNaming_NamingContext__vepv impl_CosNaming_NamingContext_vepv =
{
  &impl_CosNaming_NamingContext_base_epv,
  &impl_CosNaming_NamingContext_epv,
};
static POA_CosNaming_BindingIterator__vepv impl_CosNaming_BindingIterator_vepv =
{
  &impl_CosNaming_BindingIterator_base_epv,
  &impl_CosNaming_BindingIterator_epv,
};

/*** Stub implementations ***/

static void
NameComponent__copy (CosNaming_NameComponent * dest,
		     CosNaming_NameComponent * src)
{
  dest->id = CORBA_string_alloc (strlen (src->id));
  dest->kind = CORBA_string_alloc (strlen (src->kind));
  strcpy (dest->id, src->id);
  strcpy (dest->kind, src->kind);
}

static void
Name__copy ( CosNaming_Name* dest, CosNaming_Name* src, int from_pos )
{
  int i;
  dest->_length = MAX(src->_length - from_pos, 0);
  dest->_buffer = dest->_length?CORBA_sequence_CosNaming_NameComponent_allocbuf (dest->_length):NULL;
  for (i = 0; i < dest->_length; i++)
    {
      NameComponent__copy (dest->_buffer + i, src->_buffer + i + from_pos);
    }
}

static guint
nc_hash(const CosNaming_NameComponent *nom)
{
  return g_str_hash(nom->id);
}

static gint
nc_compare(const CosNaming_NameComponent *n1,
	   const CosNaming_NameComponent *n2)
{
  return !strcmp(n1->id, n2->id);
}

static RegisteredName *rn_new(CosNaming_NameComponent *nc,
			      CORBA_Object obj, CORBA_boolean is_subctx)
{
  RegisteredName *retval;

  retval = g_new0(RegisteredName, 1);

  retval->nc.id = CORBA_string_dup(nc->id);
  retval->nc.kind = CORBA_string_dup(nc->kind);

  retval->obj = CORBA_Object_duplicate(obj, /* cheat */ NULL);
  retval->is_subctx = is_subctx;

  return retval;
}

static void
rn_print(CosNaming_NameComponent *nc, RegisteredName *nom)
{
  g_print("id %s kind %s ptr %p [%p]\n", nc->id, nc->kind,
	  nom->obj, nom->obj?nom->obj->servant:NULL);
}

static RegisteredName *rn_ref(RegisteredName *nom)
{
  nom->refcount++;

  return nom;
}

static RegisteredName *rn_unref(RegisteredName *nom)
{
  nom->refcount--;

  if(nom->refcount <= 0) {
    CORBA_free(nom->nc.id);
    CORBA_free(nom->nc.kind);
    CORBA_Object_release(nom->obj, /* cheat */ NULL);
    g_free(nom);
    return nom;
  } else
    return NULL;
}

static void do_exit(void) {
  syslog(LOG_DEBUG, "Got alarm\n");
  _exit(5);
}

static gint
server_is_alive(CORBA_Object server)
{
  int childpid, exitstatus, itmp;

  if(server->servant)
    return TRUE;

  childpid = fork();

  if(!childpid) {
    GIOPConnection* cnx = NULL;

#if 0
	volatile int stophere=1;
	while(stophere);
#elif 0
	sleep(15);
#endif

    signal(SIGALRM, (void (*)(int))do_exit);
    alarm(2);
    cnx = _ORBit_object_get_connection(server);
    syslog(LOG_DEBUG, "server_is_alive: cnx[%s] = %p\n",
	   server->object_id, cnx);
    _exit(cnx == NULL);
  }

  itmp = waitpid(childpid, &exitstatus, 0);

  if(itmp < 0) return FALSE;
  return !WEXITSTATUS(exitstatus);
}

static CosNaming_BindingIterator 
impl_CosNaming_BindingIterator__create(PortableServer_POA poa, impl_POA_CosNaming_BindingIterator **ns,
				       CORBA_Environment * ev);

CosNaming_NamingContext 
impl_CosNaming_NamingContext__create(PortableServer_POA poa, CORBA_Environment * ev)
{
  CosNaming_NamingContext retval;
  impl_POA_CosNaming_NamingContext *newservant;
  PortableServer_ObjectId *objid;

  newservant = g_new0(impl_POA_CosNaming_NamingContext, 1);
  newservant->servant.vepv = &impl_CosNaming_NamingContext_vepv;
  newservant->poa = poa;
  newservant->names = g_hash_table_new((GHashFunc)nc_hash, (GCompareFunc)nc_compare);

  POA_CosNaming_NamingContext__init((PortableServer_Servant) newservant, ev);
  newservant->oid = objid = PortableServer_POA_activate_object(poa, newservant, ev);
  newservant->objref = retval = CORBA_Object_duplicate(PortableServer_POA_servant_to_reference(poa, newservant, ev), ev);

  return retval;
}

void
do_rn_unref(gpointer key, gpointer val, gpointer user_data)
{
  rn_unref(val);
}

/* You shouldn't call this routine directly without first deactivating the servant... */
static void
impl_CosNaming_NamingContext__destroy(impl_POA_CosNaming_NamingContext * servant, CORBA_Environment * ev)
{
  g_hash_table_foreach_remove(servant->names, (GHRFunc)do_rn_unref, servant);
  g_hash_table_destroy(servant->names);
#if 0
  servant->objref->servant = NULL; /* xxx cheating */
#endif
  CORBA_Object_release(servant->objref, ev);
  POA_CosNaming_NamingContext__fini((PortableServer_Servant) servant, ev);
  g_free(servant);
}

void
impl_CosNaming_NamingContext_bind(impl_POA_CosNaming_NamingContext * servant,
				  CosNaming_Name * n,
				  CORBA_Object obj,
				  CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;

  if(n->_length < 1) goto raise_exc;

  nom = g_hash_table_lookup(servant->names, n->_buffer);

  if(n->_length == 1) {
    if(nom) {
      if(server_is_alive(nom->obj)) {
	CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			    ex_CosNaming_NamingContext_AlreadyBound, NULL);
	return;
      } else
	impl_CosNaming_NamingContext_unbind(servant, n, ev);
    }

    nom = rn_new(&n->_buffer[0], obj, CORBA_FALSE);
    g_hash_table_insert(servant->names, &nom->nc, rn_ref(nom));

  } else if(nom && nom->is_subctx) {
    CosNaming_Name n2 = *n;

    n2._length--;
    n2._buffer++;
    CosNaming_NamingContext_bind(nom->obj, &n2, obj, ev);
    return;
  } else {

    CosNaming_NamingContext_NotFound *exdata;
  raise_exc:

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = nom?CosNaming_NamingContext_not_context:CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  }
}

void
impl_CosNaming_NamingContext_rebind(impl_POA_CosNaming_NamingContext * servant,
				    CosNaming_Name * n,
				    CORBA_Object obj,
				    CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;

  if(n->_length < 1) goto raise_exc;

  nom = g_hash_table_lookup(servant->names, n->_buffer);

  if(n->_length == 1) {
    if(nom) {
      g_hash_table_remove(servant->names, &nom->nc);
      rn_unref(nom);
    }

    nom = rn_new(&n->_buffer[0], obj, CORBA_FALSE);
    g_hash_table_insert(servant->names, &nom->nc, rn_ref(nom));

  } else if(nom && nom->is_subctx) {
    CosNaming_Name n2 = *n;

    n2._length--;
    n2._buffer++;
    CosNaming_NamingContext_rebind(nom->obj, &n2, obj, ev);
  } else {
    CosNaming_NamingContext_NotFound *exdata;
  raise_exc:

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = nom?CosNaming_NamingContext_not_context:CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  }
}

void
impl_CosNaming_NamingContext_bind_context(impl_POA_CosNaming_NamingContext * servant,
					  CosNaming_Name * n,
					  CosNaming_NamingContext nc,
					  CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;

  if(n->_length < 1) goto raise_exc;

  nom = g_hash_table_lookup(servant->names, n->_buffer);

  if(n->_length == 1) {
    if(nom) {
      if(server_is_alive(nom->obj)) {
	CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			    ex_CosNaming_NamingContext_AlreadyBound, NULL);
	return;
      } else
	impl_CosNaming_NamingContext_unbind(servant, n, ev);
    }

    nom = rn_new(&n->_buffer[0], nc, CORBA_TRUE);
    g_hash_table_insert(servant->names, &nom->nc, rn_ref(nom));

  } else if(nom && nom->is_subctx) {
    CosNaming_Name n2 = *n;

    n2._length--;
    n2._buffer++;
    CosNaming_NamingContext_bind(nom->obj, &n2, nc, ev);
    return;
  } else {

    CosNaming_NamingContext_NotFound *exdata;
  raise_exc:

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = nom?CosNaming_NamingContext_not_context:CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  }
}

void
impl_CosNaming_NamingContext_rebind_context(impl_POA_CosNaming_NamingContext * servant,
					    CosNaming_Name * n,
					    CosNaming_NamingContext nc,
					    CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;

  if(n->_length < 1) goto raise_exc;
  nom = g_hash_table_lookup(servant->names, n->_buffer);

  if(n->_length == 1) {
    if(nom) {
      g_hash_table_remove(servant->names, &nom->nc);
      rn_unref(nom);
    }

    nom = rn_new(&n->_buffer[0], nc, CORBA_TRUE);
    g_hash_table_insert(servant->names, &nom->nc, rn_ref(nom));

  } else if(nom && nom->is_subctx) {
    CosNaming_Name n2 = *n;

    n2._length--;
    n2._buffer++;
    CosNaming_NamingContext_rebind_context(nom->obj, &n2, nc, ev);
  } else {
    CosNaming_NamingContext_NotFound *exdata;
  raise_exc:

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = nom?CosNaming_NamingContext_not_context:CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  }
}

CORBA_Object
impl_CosNaming_NamingContext_resolve(impl_POA_CosNaming_NamingContext * servant,
				     CosNaming_Name * n,
				     CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;

  if(n->_length < 1) goto raise_exc;
  nom = g_hash_table_lookup(servant->names, n->_buffer);
  if(!nom) {
    CosNaming_NamingContext_NotFound *exdata;

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  } else if(n->_length == 1) {
    if(server_is_alive(nom->obj))
       return CORBA_Object_duplicate(nom->obj, ev);
    else {
      CosNaming_NamingContext_NotFound *exdata;
    raise_exc:

      impl_CosNaming_NamingContext_unbind(servant, n, ev);

      exdata = CosNaming_NamingContext_NotFound__alloc();
      exdata->why = CosNaming_NamingContext_missing_node;
      Name__copy(&exdata->rest_of_name, n, 0);

      CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			  ex_CosNaming_NamingContext_NotFound, exdata);
    }
  } else {
    CosNaming_Name n2 = *n;

    n2._length--;
    n2._buffer++;
    return CosNaming_NamingContext_resolve(nom->obj, &n2, ev);
  }

  return CORBA_OBJECT_NIL;
}

void
impl_CosNaming_NamingContext_unbind(impl_POA_CosNaming_NamingContext * servant,
				    CosNaming_Name * n,
				    CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;

  if(n->_length < 1) goto raise_exc;
  nom = g_hash_table_lookup(servant->names, n->_buffer);

  if(n->_length == 1 && nom) {
    g_hash_table_remove(servant->names, &nom->nc);
    rn_unref(nom);
  } else if(nom && nom->is_subctx) {
    CosNaming_Name n2 = *n;

    n2._length--;
    n2._buffer++;
    CosNaming_NamingContext_unbind(nom->obj, &n2, ev);
  } else {
    CosNaming_NamingContext_NotFound *exdata;
  raise_exc:

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = nom?CosNaming_NamingContext_not_context:CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  }
}

CosNaming_NamingContext
impl_CosNaming_NamingContext_new_context(impl_POA_CosNaming_NamingContext * servant,
					 CORBA_Environment * ev)
{
  return impl_CosNaming_NamingContext__create(servant->poa, ev);
}

CosNaming_NamingContext
impl_CosNaming_NamingContext_bind_new_context(impl_POA_CosNaming_NamingContext * servant,
					      CosNaming_Name * n,
					      CORBA_Environment * ev)
{
  RegisteredName *nom = NULL;
  CosNaming_NamingContext retval;

  if(n->_length < 1) goto raise_exc;
  nom = g_hash_table_lookup(servant->names, n->_buffer);

  if(n->_length == 1) {
    if(nom) {
      if(server_is_alive(nom->obj)) {
	CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			    ex_CosNaming_NamingContext_AlreadyBound, NULL);
	return CORBA_OBJECT_NIL;
      } else
	impl_CosNaming_NamingContext_unbind(servant, n, ev);
    }

    retval = impl_CosNaming_NamingContext_new_context(servant, ev);
    impl_CosNaming_NamingContext_bind_context(servant, n, retval, ev);

    return retval;
  } else if(nom && nom->is_subctx) {
    CosNaming_Name n2 = *n;
      
    n2._length--;
    n2._buffer++;

    return CosNaming_NamingContext_bind_new_context(nom->obj, &n2, ev);
  } else {
    CosNaming_NamingContext_NotFound *exdata;
  raise_exc:

    exdata = CosNaming_NamingContext_NotFound__alloc();
    exdata->why = nom?CosNaming_NamingContext_not_context:CosNaming_NamingContext_missing_node;
    Name__copy(&exdata->rest_of_name, n, 0);

    CORBA_exception_set(ev, CORBA_USER_EXCEPTION,
			ex_CosNaming_NamingContext_NotFound, exdata);
  }

  return CORBA_OBJECT_NIL;
}

void
impl_CosNaming_NamingContext_destroy(impl_POA_CosNaming_NamingContext * servant,
				     CORBA_Environment * ev)
{
  PortableServer_POA_deactivate_object(servant->poa, servant->oid, ev);
  impl_CosNaming_NamingContext__destroy(servant, ev);
}

static CosNaming_BindingList *
n_names_into_bindinglist(GList **itemlist, int n)
{
  CosNaming_BindingList *bl = CosNaming_BindingList__alloc();
  int i;
  RegisteredName *curnom;

  bl->_length = n;
  bl->_buffer = n?CORBA_sequence_CosNaming_Binding_allocbuf(bl->_length):NULL;
  for(i = 0; i < n; i++) {
    curnom = (*itemlist)->data; *itemlist = g_list_remove_link(*itemlist, *itemlist);

    bl->_buffer[i].binding_name._length = 1;
    bl->_buffer[i].binding_name._buffer = CORBA_sequence_CosNaming_NameComponent_allocbuf(1);
    NameComponent__copy(&bl->_buffer[i].binding_name._buffer[0], &curnom->nc);
    bl->_buffer[i].binding_type = curnom->is_subctx?CosNaming_ncontext:CosNaming_nobject;

    rn_unref(curnom);
  }

  return bl;
}

void list_ptr_append(gpointer key, gpointer val, GList **listptr)
{
  *listptr = g_list_append(*listptr, rn_ref(val));
}

static GList *
nc_names_into_itemlist(impl_POA_CosNaming_NamingContext *servant)
{
  GList *retval = NULL;
  g_hash_table_foreach(servant->names, (GHFunc)list_ptr_append, &retval);

  return retval;
}

void
impl_CosNaming_NamingContext_list(impl_POA_CosNaming_NamingContext * servant,
				  CORBA_unsigned_long how_many,
				  CosNaming_BindingList ** bl,
				  CosNaming_BindingIterator * bi,
				  CORBA_Environment * ev)
{
  GList *itemlist;

  itemlist = nc_names_into_itemlist(servant);

  if(how_many > 0) {
    *bl = n_names_into_bindinglist(&itemlist, MIN(how_many, g_hash_table_size(servant->names)));
  } else
    *bl = NULL;
    
  if(itemlist) {
    impl_POA_CosNaming_BindingIterator *newservant;
    *bi = impl_CosNaming_BindingIterator__create(servant->poa, &newservant, ev);
    newservant->items = itemlist;
  } else
    *bi = CORBA_OBJECT_NIL;
}

static CosNaming_BindingIterator 
impl_CosNaming_BindingIterator__create(PortableServer_POA poa, impl_POA_CosNaming_BindingIterator **ns,
				       CORBA_Environment * ev)
{
  CosNaming_BindingIterator retval;
  impl_POA_CosNaming_BindingIterator *newservant;

  newservant = *ns = g_new0(impl_POA_CosNaming_BindingIterator, 1);
  newservant->servant.vepv = &impl_CosNaming_BindingIterator_vepv;
  newservant->poa = poa;
  newservant->items = NULL;

  POA_CosNaming_BindingIterator__init((PortableServer_Servant) newservant, ev);
  newservant->oid = PortableServer_POA_activate_object(poa, newservant, ev);
  retval = PortableServer_POA_servant_to_reference(poa, newservant, ev);

  return retval;
}

/* You shouldn't call this routine directly without first deactivating the servant... */
static void
impl_CosNaming_BindingIterator__destroy(impl_POA_CosNaming_BindingIterator * servant, CORBA_Environment * ev)
{
  g_list_foreach(servant->items, (GFunc)rn_unref, NULL);
  g_list_free(servant->items);

  POA_CosNaming_BindingIterator__fini((PortableServer_Servant) servant, ev);
  g_free(servant);
}

CORBA_boolean
impl_CosNaming_BindingIterator_next_one(impl_POA_CosNaming_BindingIterator * servant,
					CosNaming_Binding ** b,
					CORBA_Environment * ev)
{
  RegisteredName *curnom;

  if(servant->items) {
    *b = CosNaming_Binding__alloc();
    curnom = servant->items->data; servant->items = g_list_remove_link(servant->items, servant->items);

    (*b)->binding_name._length = 1;
    (*b)->binding_name._buffer = CORBA_sequence_CosNaming_NameComponent_allocbuf(1);
    NameComponent__copy(&(*b)->binding_name._buffer[0], &curnom->nc);
    (*b)->binding_type = curnom->is_subctx?CosNaming_ncontext:CosNaming_nobject;

    rn_unref(curnom);
  } else
    *b = NULL;

  return servant->items?CORBA_TRUE:CORBA_FALSE;
}

CORBA_boolean
impl_CosNaming_BindingIterator_next_n(impl_POA_CosNaming_BindingIterator * servant,
				      CORBA_unsigned_long how_many,
				      CosNaming_BindingList ** bl,
				      CORBA_Environment * ev)
{
  *bl = n_names_into_bindinglist(&servant->items, MIN(g_list_length(servant->items), how_many));

  return ((*bl)->_length > 0);
}

void
impl_CosNaming_BindingIterator_destroy(impl_POA_CosNaming_BindingIterator * servant,
				       CORBA_Environment * ev)
{
  PortableServer_POA_deactivate_object(servant->poa, servant->oid, ev);
  impl_CosNaming_BindingIterator__destroy(servant, ev);
}