/*!
  @header FTDictionaryServiceForNodeImpl
  @abstract Module of FT
 
  @availability OS X, GNUstep
  @copyright 2004, 2005, 2006 Free Software Foundation, Inc.
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA

  <pre>
  -------------------------------------------------------------------------
  Modification history

  17.07.06 ola     initial version
  23.08.06 ola     license changed
  -------------------------------------------------------------------------
  </pre>
*/

#include <FT/FTLogging.h>
#include <FT/FTSessionImpl.h>
#include "FTDictionaryServiceForNodeImpl.h"
#include <FT/FTTransactionContext.h>
#include "FTDictionaryServiceTransactionStepImpl.h"
#include "FTDictionaryServiceForGraphImpl.h"

@implementation FTDictionaryServiceForNodeImpl

- initForDictionaryServiceForGraph: 
  (FTDictionaryServiceForGraphImpl *) aServiceForGraph
  forNode: (id <FTNode>) aNode {
  
  self = [super init];
  
  self->serviceForGraph = [aServiceForGraph retain];
  self->node = [aNode retain];
  
  return self;
}


- (void) dealloc {
  [self->serviceForGraph release];
  [self->node release];
  
  [super dealloc];
}


- (id <ECIterator>) allKeys {
  return [self->serviceForGraph allKeysOfNode: self->node];
}


- (void) close {
  return;
}


- setObject: (id <NSCoding>) anObject forKey: (id <NSCoding>) aKey {
  id <FTTransaction> transaction;
  FTTransactionContext *context;
  FTDictionaryServiceTransactionStepImpl *transactionStep;
  
  if( [[FTLogging coreLog] isTraceEnabled] ) {
    [[FTLogging coreLog] trace: @"FTDictionaryServiceForNodeImpl::setObject"];
  }
  
  /* todo: first check wether node exists in db ... */
  transaction = [[FTSessionImpl currentSession] currentTransaction];
  if( nil == transaction ) {
    [[[ECIllegalStateException alloc]
      initWithIllegalStateInfo: @"FTDictionaryServiceForNodeImpl::setObject: "\
        "no transaction given!"]
      raise];
  }
  
  context = [[((FTTransactionImpl *) transaction) createContext]
    autorelease];
    
  transactionStep = [FTDictionaryServiceTransactionStepImpl 
    transactionForOperationSETOfNode: self->node
    withKey: aKey
    withObject: anObject
    withDictionaryServiceGraphImpl: self->serviceForGraph
    transactionContext: context];  
    
  [((FTTransactionImpl *) transaction) 
    addTransactionStep: transactionStep
    withContext: context ];
    
  return self;
}


- objectForKey: (id <NSCoding>) aKey {
  if( [[FTLogging coreLog] isTraceEnabled] ) {
    [[FTLogging coreLog]
      trace: @"FTDictionaryServiceForNodeImpl::objectForKey"];
  }
  
  return [self->serviceForGraph 
    objectForKey: aKey 
    ofNode: self->node];
}


- removeObjectForKey: (id <NSCoding>) aKey {
  id <FTTransaction> transaction;
  FTTransactionContext *context;
  FTDictionaryServiceTransactionStepImpl *transactionStep;
  
  if( [[FTLogging coreLog] isTraceEnabled] ) {
    [[FTLogging coreLog] trace: @"FTDictionaryServiceForNodeImpl::"\
      "removeObjectForKey"];
  }
  
  /* todo: first check wether node exists in db ... */
  transaction = [[FTSessionImpl currentSession] currentTransaction];
  if( nil == transaction ) {
    [[[ECIllegalStateException alloc]
      initWithIllegalStateInfo: @"FTDictionaryServiceForNodeImpl::"\
        "removeObjectForKey: no transaction given!"]
      raise];
  }
  
  context = [[((FTTransactionImpl *) transaction) createContext]
    autorelease];
    
  transactionStep = [FTDictionaryServiceTransactionStepImpl 
    transactionForOperationREMOVEOfNode: self->node
    withKey: aKey
    withDictionaryServiceGraphImpl: self->serviceForGraph
    transactionContext: context];  
    
  [((FTTransactionImpl *) transaction) 
    addTransactionStep: transactionStep
    withContext: context ];
  
  return self;
}


- (NSString *) serviceId {
  return [[self->serviceForGraph serviceLoader] serviceId];
}


- (id <FTVersion>) serviceVersion {
  return [[self->serviceForGraph serviceLoader] serviceVersion];
}
@end