ucb/source/cacher/cachedcontentresultsetstub.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <cachedcontentresultsetstub.hxx>
  22 #include <com/sun/star/sdbc/FetchDirection.hpp>
  23 #include <com/sun/star/ucb/FetchError.hpp>
  24 #include <osl/diagnose.h>
  25
  26 using namespace com::sun::star::beans;
  27 using namespace com::sun::star::lang;
  28 using namespace com::sun::star::sdbc;
  29 using namespace com::sun::star::ucb;
  30 using namespace com::sun::star::uno;
  31 using namespace com::sun::star::util;
  32 using namespace cppu;
  33
  34
  35 CachedContentResultSetStub::CachedContentResultSetStub( Reference< XResultSet > xOrigin )
  36                 : ContentResultSetWrapper( xOrigin )
  37                 , m_nColumnCount( 0 )
  38                 , m_bColumnCountCached( false )
  39                 , m_bNeedToPropagateFetchSize( true )
  40                 , m_bFirstFetchSizePropagationDone( false )
  41                 , m_nLastFetchSize( 1 )//this value is not important at all
  42                 , m_bLastFetchDirection( true )//this value is not important at all
  43                 , m_aPropertyNameForFetchSize( OUString("FetchSize") )
  44                 , m_aPropertyNameForFetchDirection( OUString("FetchDirection") )
  45 {
  46     impl_init();
  47 }
  48
  49 CachedContentResultSetStub::~CachedContentResultSetStub()
  50 {
  51     impl_deinit();
  52 }
  53
  54
  55 // XInterface methods.
  56 void SAL_CALL CachedContentResultSetStub::acquire()
  57     throw()
  58 {
  59     OWeakObject::acquire();
  60 }
  61
  62 void SAL_CALL CachedContentResultSetStub::release()
  63     throw()
  64 {
  65     OWeakObject::release();
  66 }
  67
  68 Any SAL_CALL CachedContentResultSetStub
  69     ::queryInterface( const Type&  rType )
  70     throw ( RuntimeException, std::exception )
  71 {
  72     //list all interfaces inclusive baseclasses of interfaces
  73
  74     Any aRet = ContentResultSetWrapper::queryInterface( rType );
  75     if( aRet.hasValue() )
  76         return aRet;
  77
  78     aRet = cppu::queryInterface( rType
  79                 , static_cast< XTypeProvider* >( this )
  80                 , static_cast< XServiceInfo* >( this )
  81                 , static_cast< XFetchProvider* >( this )
  82                 , static_cast< XFetchProviderForContentAccess* >( this )
  83                 );
  84
  85     return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
  86 }
  87
  88
  89 // own methods.  ( inherited )
  90
  91
  92 //virtual
  93 void SAL_CALL CachedContentResultSetStub
  94     ::impl_propertyChange( const PropertyChangeEvent& rEvt )
  95     throw( RuntimeException )
  96 {
  97     impl_EnsureNotDisposed();
  98
  99     //don't notify events on fetchsize and fetchdirection to the above CachedContentResultSet
 100     //because it will ignore them anyway and we can save this remote calls
 101     if(    rEvt.PropertyName == m_aPropertyNameForFetchSize
 102         || rEvt.PropertyName == m_aPropertyNameForFetchDirection )
 103         return;
 104
 105     PropertyChangeEvent aEvt( rEvt );
 106     aEvt.Source = static_cast< XPropertySet * >( this );
 107     aEvt.Further = sal_False;
 108
 109     impl_notifyPropertyChangeListeners( aEvt );
 110 }
 111
 112
 113 //virtual
 114 void SAL_CALL CachedContentResultSetStub
 115     ::impl_vetoableChange( const PropertyChangeEvent& rEvt )
 116     throw( PropertyVetoException,
 117            RuntimeException )
 118 {
 119     impl_EnsureNotDisposed();
 120
 121     //don't notify events on fetchsize and fetchdirection to the above CachedContentResultSet
 122     //because it will ignore them anyway and we can save this remote calls
 123     if(    rEvt.PropertyName == m_aPropertyNameForFetchSize
 124         || rEvt.PropertyName == m_aPropertyNameForFetchDirection )
 125         return;
 126
 127     PropertyChangeEvent aEvt( rEvt );
 128     aEvt.Source = static_cast< XPropertySet * >( this );
 129     aEvt.Further = sal_False;
 130
 131     impl_notifyVetoableChangeListeners( aEvt );
 132 }
 133
 134
 135 // XTypeProvider methods.
 136
 137
 138 XTYPEPROVIDER_COMMON_IMPL( CachedContentResultSetStub )
 139 //list all interfaces exclusive baseclasses
 140 Sequence< Type > SAL_CALL CachedContentResultSetStub
 141     ::getTypes()
 142     throw( RuntimeException, std::exception )
 143 {
 144     static Sequence< Type >* pTypes = NULL;
 145     if( !pTypes )
 146     {
 147         osl::Guard< osl::Mutex > aGuard( osl::Mutex::getGlobalMutex() );
 148         if( !pTypes )
 149         {
 150             pTypes = new Sequence< Type >(13);
 151             (*pTypes)[0] = CPPU_TYPE_REF( XTypeProvider );
 152             (*pTypes)[1] = CPPU_TYPE_REF( XServiceInfo );
 153             (*pTypes)[2] = CPPU_TYPE_REF( XComponent );
 154             (*pTypes)[3] = CPPU_TYPE_REF( XCloseable );
 155             (*pTypes)[4] = CPPU_TYPE_REF( XResultSetMetaDataSupplier );
 156             (*pTypes)[5] = CPPU_TYPE_REF( XPropertySet );
 157             (*pTypes)[6] = CPPU_TYPE_REF( XPropertyChangeListener );
 158             (*pTypes)[7] = CPPU_TYPE_REF( XVetoableChangeListener );
 159             (*pTypes)[8] = CPPU_TYPE_REF( XResultSet );
 160             (*pTypes)[9] = CPPU_TYPE_REF( XContentAccess );
 161             (*pTypes)[10] = CPPU_TYPE_REF( XRow );
 162             (*pTypes)[11] = CPPU_TYPE_REF( XFetchProvider );
 163             (*pTypes)[12] = CPPU_TYPE_REF( XFetchProviderForContentAccess );
 164         }
 165     }
 166     return *pTypes;
 167 }
 168
 169
 170 // XServiceInfo methods.
 171
 172
 173 XSERVICEINFO_NOFACTORY_IMPL_1( CachedContentResultSetStub,
 174                         OUString( "com.sun.star.comp.ucb.CachedContentResultSetStub" ),
 175                         OUString( CACHED_CRS_STUB_SERVICE_NAME ) );
 176
 177
 178 // XFetchProvider methods.
 179
 180
 181 #define FETCH_XXX( impl_loadRow, loadInterface ) \
 182 impl_EnsureNotDisposed(); \
 183 if( !m_xResultSetOrigin.is() ) \
 184 { \
 185     OSL_FAIL( "broadcaster was disposed already" ); \
 186     throw RuntimeException(); \
 187 } \
 188 impl_propagateFetchSizeAndDirection( nRowCount, bDirection ); \
 189 FetchResult aRet; \
 190 aRet.StartIndex = nRowStartPosition; \
 191 aRet.Orientation = bDirection; \
 192 aRet.FetchError = FetchError::SUCCESS; /*ENDOFDATA, EXCEPTION*/ \
 193 sal_Int32 nOldOriginal_Pos = m_xResultSetOrigin->getRow(); \
 194 if( impl_isForwardOnly() ) \
 195 { \
 196     if( nOldOriginal_Pos != nRowStartPosition ) \
 197     { \
 198         /*@todo*/ \
 199         aRet.FetchError = FetchError::EXCEPTION; \
 200         return aRet; \
 201     } \
 202     if( nRowCount != 1 ) \
 203         aRet.FetchError = FetchError::EXCEPTION; \
 204  \
 205     aRet.Rows.realloc( 1 ); \
 206  \
 207     try \
 208     { \
 209         impl_loadRow( aRet.Rows[0], loadInterface ); \
 210     } \
 211     catch( SQLException& ) \
 212     { \
 213         aRet.Rows.realloc( 0 ); \
 214         aRet.FetchError = FetchError::EXCEPTION; \
 215         return aRet; \
 216     } \
 217     return aRet; \
 218 } \
 219 aRet.Rows.realloc( nRowCount ); \
 220 bool bOldOriginal_AfterLast = false; \
 221 if( !nOldOriginal_Pos ) \
 222     bOldOriginal_AfterLast = m_xResultSetOrigin->isAfterLast(); \
 223 sal_Int32 nN = 1; \
 224 bool bValidNewPos = false; \
 225 try \
 226 { \
 227     try \
 228     { \
 229         /*if( nOldOriginal_Pos != nRowStartPosition )*/ \
 230         bValidNewPos = m_xResultSetOrigin->absolute( nRowStartPosition ); \
 231     } \
 232     catch( SQLException& ) \
 233     { \
 234         aRet.Rows.realloc( 0 ); \
 235         aRet.FetchError = FetchError::EXCEPTION; \
 236         return aRet; \
 237     } \
 238     if( !bValidNewPos ) \
 239     { \
 240         aRet.Rows.realloc( 0 ); \
 241         aRet.FetchError = FetchError::EXCEPTION; \
 242  \
 243         /*restore old position*/ \
 244         if( nOldOriginal_Pos ) \
 245             m_xResultSetOrigin->absolute( nOldOriginal_Pos ); \
 246         else if( bOldOriginal_AfterLast ) \
 247             m_xResultSetOrigin->afterLast(); \
 248         else \
 249             m_xResultSetOrigin->beforeFirst(); \
 250  \
 251         return aRet; \
 252     } \
 253     for( ; nN <= nRowCount; ) \
 254     { \
 255         impl_loadRow( aRet.Rows[nN-1], loadInterface ); \
 256         nN++; \
 257         if( nN <= nRowCount ) \
 258         { \
 259             if( bDirection ) \
 260             { \
 261                 if( !m_xResultSetOrigin->next() ) \
 262                 { \
 263                     aRet.Rows.realloc( nN-1 ); \
 264                     aRet.FetchError = FetchError::ENDOFDATA; \
 265                     break; \
 266                 } \
 267             } \
 268             else \
 269             { \
 270                 if( !m_xResultSetOrigin->previous() ) \
 271                 { \
 272                     aRet.Rows.realloc( nN-1 ); \
 273                     aRet.FetchError = FetchError::ENDOFDATA; \
 274                     break; \
 275                 } \
 276             } \
 277         } \
 278     } \
 279 } \
 280 catch( SQLException& ) \
 281 { \
 282     aRet.Rows.realloc( nN-1 ); \
 283     aRet.FetchError = FetchError::EXCEPTION; \
 284 } \
 285 /*restore old position*/ \
 286 if( nOldOriginal_Pos ) \
 287     m_xResultSetOrigin->absolute( nOldOriginal_Pos ); \
 288 else if( bOldOriginal_AfterLast ) \
 289     m_xResultSetOrigin->afterLast(); \
 290 else \
 291     m_xResultSetOrigin->beforeFirst(); \
 292 return aRet;
 293
 294 FetchResult SAL_CALL CachedContentResultSetStub
 295     ::fetch( sal_Int32 nRowStartPosition
 296     , sal_Int32 nRowCount, sal_Bool bDirection )
 297     throw( RuntimeException, std::exception )
 298 {
 299     impl_init_xRowOrigin();
 300     FETCH_XXX( impl_getCurrentRowContent, m_xRowOrigin );
 301 }
 302
 303 sal_Int32 SAL_CALL CachedContentResultSetStub
 304     ::impl_getColumnCount()
 305 {
 306     sal_Int32 nCount;
 307     bool bCached;
 308     {
 309         osl::Guard< osl::Mutex > aGuard( m_aMutex );
 310         nCount = m_nColumnCount;
 311         bCached = m_bColumnCountCached;
 312     }
 313     if( !bCached )
 314     {
 315         try
 316         {
 317             Reference< XResultSetMetaData > xMetaData = getMetaData();
 318             if( xMetaData.is() )
 319                 nCount = xMetaData->getColumnCount();
 320         }
 321         catch( SQLException& )
 322         {
 323             OSL_FAIL( "couldn't determine the column count" );
 324             nCount = 0;
 325         }
 326     }
 327     osl::Guard< osl::Mutex > aGuard( m_aMutex );
 328     m_nColumnCount = nCount;
 329     m_bColumnCountCached = true;
 330     return m_nColumnCount;
 331 }
 332
 333 void SAL_CALL CachedContentResultSetStub
 334     ::impl_getCurrentRowContent( Any& rRowContent
 335         , Reference< XRow > xRow )
 336         throw ( SQLException, RuntimeException )
 337 {
 338     sal_Int32 nCount = impl_getColumnCount();
 339
 340     Sequence< Any > aContent( nCount );
 341     for( sal_Int32 nN = 1; nN <= nCount; nN++ )
 342     {
 343         aContent[nN-1] = xRow->getObject( nN, NULL );
 344     }
 345
 346     rRowContent <<= aContent;
 347 }
 348
 349 void SAL_CALL CachedContentResultSetStub
 350     ::impl_propagateFetchSizeAndDirection( sal_Int32 nFetchSize, bool bFetchDirection )
 351         throw ( RuntimeException )
 352 {
 353     //this is done only for the case, that there is another CachedContentResultSet in the chain of underlying ResulSets
 354
 355     //we do not propagate the property 'FetchSize' or 'FetchDirection' via 'setPropertyValue' from the above CachedContentResultSet to save remote calls
 356
 357     //if the underlying ResultSet has a property FetchSize and FetchDirection,
 358     //we will set these properties, if the new given parameters are different from the last ones
 359
 360     if( !m_bNeedToPropagateFetchSize )
 361         return;
 362
 363     bool bNeedAction;
 364     sal_Int32 nLastSize;
 365     bool bLastDirection;
 366     bool bFirstPropagationDone;
 367     {
 368         osl::Guard< osl::Mutex > aGuard( m_aMutex );
 369         bNeedAction             = m_bNeedToPropagateFetchSize;
 370         nLastSize               = m_nLastFetchSize;
 371         bLastDirection          = m_bLastFetchDirection;
 372         bFirstPropagationDone   = m_bFirstFetchSizePropagationDone;
 373     }
 374     if( bNeedAction )
 375     {
 376         if( nLastSize == nFetchSize
 377             && bLastDirection == bFetchDirection
 378             && bFirstPropagationDone )
 379             return;
 380
 381         if(!bFirstPropagationDone)
 382         {
 383             //check whether the properties 'FetchSize' and 'FetchDirection' do exist
 384
 385             Reference< XPropertySetInfo > xPropertySetInfo = getPropertySetInfo();
 386             bool bHasSize = xPropertySetInfo->hasPropertyByName( m_aPropertyNameForFetchSize );
 387             bool bHasDirection = xPropertySetInfo->hasPropertyByName( m_aPropertyNameForFetchDirection );
 388
 389             if(!bHasSize || !bHasDirection)
 390             {
 391                 osl::Guard< osl::Mutex > aGuard( m_aMutex );
 392                 m_bNeedToPropagateFetchSize = false;
 393                 return;
 394             }
 395         }
 396
 397         bool bSetSize       = ( nLastSize       !=nFetchSize        ) || !bFirstPropagationDone;
 398         bool bSetDirection  = ( bLastDirection  !=bFetchDirection   ) || !bFirstPropagationDone;
 399
 400         {
 401             osl::Guard< osl::Mutex > aGuard( m_aMutex );
 402             m_bFirstFetchSizePropagationDone = true;
 403             m_nLastFetchSize        = nFetchSize;
 404             m_bLastFetchDirection   = bFetchDirection;
 405         }
 406
 407         if( bSetSize )
 408         {
 409             Any aValue;
 410             aValue <<= nFetchSize;
 411             try
 412             {
 413                 setPropertyValue( m_aPropertyNameForFetchSize, aValue );
 414             }
 415             catch( com::sun::star::uno::Exception& ) {}
 416         }
 417         if( bSetDirection )
 418         {
 419             sal_Int32 nFetchDirection = FetchDirection::FORWARD;
 420             if( !bFetchDirection )
 421                 nFetchDirection = FetchDirection::REVERSE;
 422             Any aValue;
 423             aValue <<= nFetchDirection;
 424             try
 425             {
 426                 setPropertyValue( m_aPropertyNameForFetchDirection, aValue );
 427             }
 428             catch( com::sun::star::uno::Exception& ) {}
 429         }
 430
 431     }
 432 }
 433
 434
 435 // XFetchProviderForContentAccess methods.
 436
 437
 438 void SAL_CALL CachedContentResultSetStub
 439     ::impl_getCurrentContentIdentifierString( Any& rAny
 440         , Reference< XContentAccess > xContentAccess )
 441         throw ( RuntimeException )
 442 {
 443      rAny <<= xContentAccess->queryContentIdentifierString();
 444 }
 445
 446 void SAL_CALL CachedContentResultSetStub
 447     ::impl_getCurrentContentIdentifier( Any& rAny
 448         , Reference< XContentAccess > xContentAccess )
 449         throw ( RuntimeException )
 450 {
 451      rAny <<= xContentAccess->queryContentIdentifier();
 452 }
 453
 454 void SAL_CALL CachedContentResultSetStub
 455     ::impl_getCurrentContent( Any& rAny
 456         , Reference< XContentAccess > xContentAccess )
 457         throw ( RuntimeException )
 458 {
 459      rAny <<= xContentAccess->queryContent();
 460 }
 461
 462 //virtual
 463 FetchResult SAL_CALL CachedContentResultSetStub
 464     ::fetchContentIdentifierStrings( sal_Int32 nRowStartPosition
 465         , sal_Int32 nRowCount, sal_Bool bDirection )
 466         throw( com::sun::star::uno::RuntimeException, std::exception )
 467 {
 468     impl_init_xContentAccessOrigin();
 469     FETCH_XXX( impl_getCurrentContentIdentifierString, m_xContentAccessOrigin );
 470 }
 471
 472 //virtual
 473 FetchResult SAL_CALL CachedContentResultSetStub
 474     ::fetchContentIdentifiers( sal_Int32 nRowStartPosition
 475         , sal_Int32 nRowCount, sal_Bool bDirection )
 476         throw( com::sun::star::uno::RuntimeException, std::exception )
 477 {
 478     impl_init_xContentAccessOrigin();
 479     FETCH_XXX( impl_getCurrentContentIdentifier, m_xContentAccessOrigin );
 480 }
 481
 482 //virtual
 483 FetchResult SAL_CALL CachedContentResultSetStub
 484     ::fetchContents( sal_Int32 nRowStartPosition
 485         , sal_Int32 nRowCount, sal_Bool bDirection )
 486         throw( com::sun::star::uno::RuntimeException, std::exception )
 487 {
 488     impl_init_xContentAccessOrigin();
 489     FETCH_XXX( impl_getCurrentContent, m_xContentAccessOrigin );
 490 }
 491
 492
 493
 494 // class CachedContentResultSetStubFactory
 495
 496
 497
 498 CachedContentResultSetStubFactory::CachedContentResultSetStubFactory(
 499         const Reference< XMultiServiceFactory > & rSMgr )
 500 {
 501     m_xSMgr = rSMgr;
 502 }
 503
 504 CachedContentResultSetStubFactory::~CachedContentResultSetStubFactory()
 505 {
 506 }
 507
 508
 509 // CachedContentResultSetStubFactory XInterface methods.
 510 void SAL_CALL CachedContentResultSetStubFactory::acquire()
 511     throw()
 512 {
 513     OWeakObject::acquire();
 514 }
 515
 516 void SAL_CALL CachedContentResultSetStubFactory::release()
 517     throw()
 518 {
 519     OWeakObject::release();
 520 }
 521
 522 css::uno::Any SAL_CALL CachedContentResultSetStubFactory::queryInterface( const css::uno::Type & rType )
 523     throw( css::uno::RuntimeException, std::exception )
 524 {
 525     css::uno::Any aRet = cppu::queryInterface( rType,
 526                                                (static_cast< XTypeProvider* >(this)),
 527                                                (static_cast< XServiceInfo* >(this)),
 528                                                (static_cast< XCachedContentResultSetStubFactory* >(this))
 529                                                );
 530     return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
 531 }
 532
 533 // CachedContentResultSetStubFactory XTypeProvider methods.
 534
 535
 536 XTYPEPROVIDER_IMPL_3( CachedContentResultSetStubFactory,
 537                       XTypeProvider,
 538                          XServiceInfo,
 539                       XCachedContentResultSetStubFactory );
 540
 541
 542 // CachedContentResultSetStubFactory XServiceInfo methods.
 543
 544
 545 XSERVICEINFO_IMPL_1( CachedContentResultSetStubFactory,
 546                      OUString( "com.sun.star.comp.ucb.CachedContentResultSetStubFactory" ),
 547                      OUString( CACHED_CRS_STUB_FACTORY_NAME ) );
 548
 549
 550 // Service factory implementation.
 551
 552
 553 ONE_INSTANCE_SERVICE_FACTORY_IMPL( CachedContentResultSetStubFactory );
 554
 555
 556 // CachedContentResultSetStubFactory XCachedContentResultSetStubFactory methods.
 557
 558
 559     //virtual
 560 Reference< XResultSet > SAL_CALL CachedContentResultSetStubFactory
 561     ::createCachedContentResultSetStub(
 562             const Reference< XResultSet > & xSource )
 563             throw( RuntimeException, std::exception )
 564 {
 565     if( xSource.is() )
 566     {
 567         Reference< XResultSet > xRet;
 568         xRet = new CachedContentResultSetStub( xSource );
 569         return xRet;
 570     }
 571     return NULL;
 572 }
 573
 574
 575 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */