C++ store::Item_t类代码示例

/*******************************************************************************
  14.9.2 fn:parse-xml-fragment
********************************************************************************/
bool FnParseXmlFragmentIterator::nextImpl(
    store::Item_t& result,
    PlanState& planState) const
{
  zstring docString;

  FnParseXmlFragmentIteratorState* state;
  DEFAULT_STACK_INIT(FnParseXmlFragmentIteratorState, state, planState);

  if (consumeNext(result, theChildren[0].getp(), planState))
  {
    if (result->isStreamable())
    {
      state->theFragmentStream.theStream = &result->getStream();
    }
    else
    {
      result->getStringValue2(docString);
      state->theFragmentStream.theIss = new std::istringstream(docString.c_str());
      state->theFragmentStream.theStream = state->theFragmentStream.theIss;
    }

    state->theProperties.setBaseUri(theSctx->get_base_uri());
    state->theProperties.setParseExternalParsedEntity(true);
    state->theProperties.setStoreDocument(false);

    state->baseUri = state->theProperties.getBaseUri();    

    // create only one document node holding all fragment nodes
    state->theFragmentStream.only_one_doc_node = 1;
       
    try
    {
      result = GENV.getStore().loadDocument(state->baseUri,
                                            state->docUri,
                                            state->theFragmentStream,
                                            state->theProperties);
    }
    catch ( ZorbaException const &e )
    {
      if ( !state->theProperties.getNoError() )
      {
        XQueryException xe(
          XQUERY_EXCEPTION(err::FODC0006,
          ERROR_PARAMS( "fn:parse-xml-fragment()", e.what() ),
          ERROR_LOC( loc )));

        set_data( xe, e );
        throw xe;
      }
      result = nullptr;
    }

    if (result != NULL)
      STACK_PUSH(true, state);
  } // if 

  STACK_END(state);
}

void IndexDelta::addGeneralPair(store::Item_t& node, store::Item_t& key)
{
  assert(node->isNode() && key->isAtomic());

  theGeneralDelta.resize(theGeneralDelta.size() + 1);
  theGeneralDelta.back().first.transfer(node);
  theGeneralDelta.back().second.transfer(key);
}

static void get_options( store::Item_t const &options_object,
                         options_type *options ) {
  ZORBA_ASSERT( options_object->getKind() == store::Item::OBJECT );
  store::Iterator_t i( options_object->getObjectKeys() );
  i->open();
  store::Item_t opt_key;
  while ( i->next( opt_key ) ) {
    zstring const opt_name( opt_key->getStringValue() );
    store::Item_t const opt_value( options_object->getObjectValue( opt_key ) );
    (*options)[ opt_name ] = opt_value->getStringValue();
  }
  i->close();
}

void dynamic_context::get_variable(
    ulong varid,
    const store::Item_t& varname,
    const QueryLoc& loc,
    store::Item_t& itemValue,
    store::TempSeq_t& seqValue) const
{
  itemValue = NULL;
  seqValue = NULL;

  if (varid >= theVarValues.size() ||
      theVarValues[varid].theState == VarValue::undeclared)
  {
    zstring varName = static_context::var_name(varname.getp());

    if (varid >= theVarValues.size() ||
        theVarValues[varid].theIsExternalOrLocal ||
        (varid > 0 && varid < MAX_IDVARS_RESERVED))
    {
      RAISE_ERROR(err::XPDY0002, loc,
      ERROR_PARAMS(ZED(XPDY0002_VariableUndeclared_2), varName));
    }
    else
    {
      RAISE_ERROR(err::XQDY0054, loc, ERROR_PARAMS(varName));
    }
  }

  const VarValue& var = theVarValues[varid];

  if (var.theState == VarValue::declared)
  {
    zstring varName = static_context::var_name(varname.getp());

    if (var.theIsExternalOrLocal)
    {
      RAISE_ERROR(err::XPDY0002, loc,
      ERROR_PARAMS(ZED(XPDY0002_VariableHasNoValue_2), varName));
    }
    else
    {
      RAISE_ERROR(err::XQDY0054, loc, ERROR_PARAMS(varName));
    }
  }

  if (var.theState == VarValue::item)
    itemValue = var.theValue.item;
  else
    seqValue = var.theValue.temp_seq;
}

bool
ZorbaValidateInPlaceIterator::nextImpl(store::Item_t& result, PlanState& planState) const
{
  store::Item_t node;

  PlanIteratorState* state;
  store::PUL_t pul;

  DEFAULT_STACK_INIT(PlanIteratorState, state, planState);

  if (consumeNext(node, theChild.getp(), planState))
  {
    // verify that if the element being revalidated is an element it is the root
    if (node->getNodeKind()==store::StoreConsts::elementNode &&
        node->getParent() &&
        node->getParent()->getNodeKind()!=store::StoreConsts::documentNode)
      throw XQUERY_EXCEPTION( zerr::ZAPI0090_CANNOT_VALIDATE_NON_ROOT, ERROR_LOC( loc ) );

    pul = GENV_ITEMFACTORY->createPendingUpdateList();

    pul->addRevalidate(&loc,node);

    result.transfer(pul);
    STACK_PUSH(true, state);
  }

  STACK_END(state);
}

static void x2j_children( store::Item_t const &parent,
                          vector<store::Item_t> *children ) {
  ZORBA_ASSERT( children );
  store::Iterator_t i( parent->getChildren() );
  i->open();
  store::Item_t child_item, temp_item;
  while ( i->next( child_item ) ) {
    if ( !x2j_map_atomic( child_item, &temp_item ) ) {
      if ( !child_item->isNode() )
        throw XQUERY_EXCEPTION(
          zerr::ZJ2X0001_JSONML_ARRAY_BAD_JSON,
          ERROR_PARAMS( ZED( ZJ2X0001_BadElement ), child_item->getKind() )
        );
      switch ( child_item->getNodeKind() ) {
        case store::StoreConsts::elementNode:
          x2j_element( child_item, &temp_item );
          break;
        case store::StoreConsts::textNode: {
          zstring s( child_item->getStringValue() );
          GENV_ITEMFACTORY->createString( temp_item, s );
          break;
        }
        default:
          continue;
      } // switch
    } // if
    children->push_back( temp_item );
  } // while
  i->close();
}

bool PlanIterator::consumeNext(
    store::Item_t& result,
    const PlanIterator* iter,
    PlanState& planState)
{
  if (planState.theHasToQuit) 
  {
    // std::cout << "Plan interupted" << std::endl;

    throw FlowCtlException(FlowCtlException::INTERRUPT);
  }
  bool status = iter->produceNext(result, planState);

  if (planState.theCompilerCB->theConfig.print_item_flow)
  {
    if (Properties::instance().getStableIteratorIDs())
      std::cout << "next (" << iter->getId();
    else
      std::cout << "next (" << iter;

    std::cout << " = " << iter->getNameAsString() // typeid (*iter).name()
              << ") -> "
              << "status: " << status << " -> "
              << ((status && result != NULL) ? result->show().c_str() : "null")
              << std::endl;
  }
  return status;
}

bool NumArithIterator<Operation>::compute(
    store::Item_t& result,
    dynamic_context* dctx,
    const TypeManager* tm,
    const QueryLoc& aLoc, 
    store::Item_t& n0,
    store::Item_t& n1)
{
  assert(n0->isAtomic());
  assert(n1->isAtomic());

  store::SchemaTypeCode type0 = n0->getTypeCode();
  store::SchemaTypeCode type1 = n1->getTypeCode();

  return computeAtomic(result, dctx, tm, aLoc, n0, type0, n1, type1);
}

store::Item_t get_json_value( store::Item_t const &object,
                              char const *key ) {
  zstring key_str( key );
  store::Item_t key_item;
  GENV_ITEMFACTORY->createString( key_item, key_str );
  return object->getObjectValue( key_item );
}

store::Item_t getFirstAttribute(store::Item_t node)
{
  store::Item_t attr;
  store::Iterator_t attributes = node->getAttributes();
  attributes->open();
  attributes->next(attr);
  attributes->close();
  return attr;
}

void xml_to_json( store::Item_t const &xml_item, store::Item_t *json_item ) {
  ZORBA_ASSERT( json_item );
  switch ( xml_item->getNodeKind() ) {
    case store::StoreConsts::elementNode:
      x2j_element( xml_item, json_item );
      break;
    default:
      throw XQUERY_EXCEPTION( zerr::ZJSE0001_NOT_ELEMENT_NODE );
  }
}

bool x2j_map_atomic( store::Item_t const &xml_item, store::Item_t *json_item ) {
  if ( xml_item->isAtomic() ) {
    switch ( xml_item->getTypeCode() ) {
      case store::JS_NULL:
      case store::XS_BOOLEAN:
      case store::XS_BYTE:
      case store::XS_DECIMAL:
      case store::XS_DOUBLE:
      case store::XS_ENTITY:
      case store::XS_FLOAT:
      case store::XS_ID:
      case store::XS_IDREF:
      case store::XS_INT:
      case store::XS_INTEGER:
      case store::XS_LONG:
      case store::XS_NAME:
      case store::XS_NCNAME:
      case store::XS_NEGATIVE_INTEGER:
      case store::XS_NMTOKEN:
      case store::XS_NON_NEGATIVE_INTEGER:
      case store::XS_NON_POSITIVE_INTEGER:
      case store::XS_NORMALIZED_STRING:
      case store::XS_POSITIVE_INTEGER:
      case store::XS_SHORT:
      case store::XS_STRING:
      case store::XS_TOKEN:
      case store::XS_UNSIGNED_BYTE:
      case store::XS_UNSIGNED_INT:
      case store::XS_UNSIGNED_LONG:
      case store::XS_UNSIGNED_SHORT:
        *json_item = xml_item;
        break;
      default:
        zstring s( xml_item->getStringValue() );
        GENV_ITEMFACTORY->createString( *json_item, s );
        break;
    } // switch
    return true;
  } // if
  return false;
}

void dynamic_context::set_variable(
    ulong varid,
    const store::Item_t& varname,
    const QueryLoc& loc,
    store::Item_t& valueItem)
{
  if (varid >= theVarValues.size() ||
      theVarValues[varid].theState == VarValue::undeclared)
  {
    RAISE_ERROR(err::XPDY0002, loc,
    ERROR_PARAMS(ZED(XPDY0002_VariableUndeclared_2), varname->getStringValue()));
  }

  VarValue& var = theVarValues[varid];

  // variables can be set multiple times, so we need to make sure to remove
  // previously set temp sequences
  if (var.theState == VarValue::item)
  {
    assert(var.theValue.item != NULL);
    var.theValue.item->removeReference();
  }
  else if (var.theState == VarValue::temp_seq)
  {
    assert(var.theValue.temp_seq != NULL);
    RCHelper::removeReference(var.theValue.temp_seq);
  }
  else if (var.theState == VarValue::declared)
  {
    assert(var.theValue.item == NULL);
  }
  else
  {
    ZORBA_ASSERT(false);
  }

  var.theState = VarValue::item;
  var.theValue.item = valueItem.release();
}

static void j2x_object( store::Item_t const &object_item,
                        store::Item_t *parent_xml_item ) {
  ZORBA_ASSERT( parent_xml_item );
  store::Item_t junk_item, key_item, type_name;

  store::Iterator_t k( object_item->getObjectKeys() );
  k->open();
  while ( k->next( key_item ) ) {
    store::Item_t att_name;
    GENV_ITEMFACTORY->createQName(
      att_name, "", "", key_item->getStringValue()
    );
    store::Item_t value_item( object_item->getObjectValue( key_item ) );
    zstring value_str( value_item->getStringValue() );
    GENV_ITEMFACTORY->createString( value_item, value_str );
    type_name = GENV_TYPESYSTEM.XS_UNTYPED_QNAME;
    GENV_ITEMFACTORY->createAttributeNode(
      junk_item, *parent_xml_item, att_name, type_name, value_item
    );
  }
  k->close();
}

void GeneralIndexCondition::pushRange(
    store::Item_t& lower,
    store::Item_t& upper,
    bool haveLower,
    bool haveUpper,
    bool lowerIncl,
    bool upperIncl)
{
  assert(theKind == BOX_VALUE);
  assert(!theIsSet);
  assert(!haveLower || (lower && lower->isAtomic()));
  assert(!haveUpper || (upper && upper->isAtomic()));

  theRangeFlags.theHaveLowerBound = haveLower;
  theRangeFlags.theHaveUpperBound = haveUpper;
  theRangeFlags.theLowerBoundIncl = lowerIncl;
  theRangeFlags.theUpperBoundIncl = upperIncl;

  if (haveLower)
  {
    theLowerBound.transfer(lower);

    store::Item* baseItem = theLowerBound->getBaseItem();
    if (baseItem != NULL)
      theLowerBound = baseItem;
  }

  if (haveUpper)
  {
    theUpperBound.transfer(upper);

    store::Item* baseItem = theUpperBound->getBaseItem();
    if (baseItem != NULL)
      theUpperBound = baseItem;
  }

  theIsSet = true;
}