documentmodel.cpp

OSB-PIK-OpenVXI-3.0.0源代码 “中国XML论坛 - 专业的XML技术讨论区--XML在语音技术中的应用”

     throw VXMLDocumentModel::InternalError();
 
   posType = pos->GetType();
   pos = const_cast<VXMLNodeRef *>(pos->GetParent());
 }
 
 
 VXMLElementType VXMLDocumentRep::GetParentType() const
 {
   if (pos == NULL)
     throw VXMLDocumentModel::InternalError();
 
   return static_cast<const VXMLElementRef *>(pos->GetParent())->name;
 }
 
 
 bool VXMLDocumentRep::GetAttribute(VXMLAttributeType key,
                                    vxistring & attr) const
 {
   if (pos == NULL || posType != VXMLNode::Type_VXMLElement)
     throw VXMLDocumentModel::InternalError();
 
   const VXMLElementRef * temp = static_cast<const VXMLElementRef *>(pos);
   return temp->GetAttribute(key, attr);
 }
 
 
 void VXMLDocumentRep::AddAttribute(VXMLAttributeType name,
                                    const vxistring & attr)
 {
   if (pos == NULL || posType != VXMLNode::Type_VXMLElement)
     throw VXMLDocumentModel::InternalError();
 
   VXMLElementRef * temp = static_cast<VXMLElementRef *>(pos);
   temp->attributes.push_back(VXMLElementRef::VXMLElementAttribute(name, attr));
 }
 
 
 void VXMLDocumentRep::AddChild(VXMLNodeRef * c)
 {
   if (root == NULL) {
     root = c;
     return;
   }
 
   if (pos == NULL || posType != VXMLNode::Type_VXMLElement)
     throw VXMLDocumentModel::InternalError();
 
   VXMLElementRef * temp = static_cast<VXMLElementRef *>(pos);
   temp->children.push_back(c);
 }
 
 
 const VXMLNodeRef * VXMLDocumentRep::GetRoot() const
 {
   return root;
 }
 
 //#############################################################################
 
 VXMLDocument::VXMLDocument(VXMLDocumentRep * x) : internals(x)
 {
   if (internals == NULL) {
     internals = new VXMLDocumentRep();
     if (internals == NULL) throw VXMLDocumentModel::OutOfMemory();
   }
 }
 
 
 VXMLDocument::~VXMLDocument()
 {
   VXMLDocumentRep::Release(internals);
 }
 
 
 VXMLDocument::VXMLDocument(const VXMLDocument & x)
 {
   internals = x.internals;
   VXMLDocumentRep::AddRef(internals);
 }
 
 
 VXMLDocument & VXMLDocument::operator=(const VXMLDocument & x)
 {
   if (this != &x) {
     VXMLDocumentRep::Release(internals);
     internals = x.internals;
     VXMLDocumentRep::AddRef(internals);
   }
   return *this;
 }
 
 
 VXMLElement VXMLDocument::GetRoot() const
 {
   if (internals == NULL) return VXMLElement();
   const VXMLNodeRef * root = internals->GetRoot();
   if (root == NULL) return VXMLElement();
   return VXMLElement(root);
 }
 
 //#############################################################################
 
 VXMLNode::VXMLNode(const VXMLNode & x)
 {
   internals = x.internals;
 }
 
 
 VXMLNode & VXMLNode::operator=(const VXMLNode & x)
 {
   if (this != &x) {
     internals = x.internals;
   }
   return *this;
 }
 
 
 VXMLElement VXMLNode::GetParent() const
 {
   if (internals != NULL && internals->GetType() == VXMLNode::Type_VXMLNode)
     throw VXMLDocumentModel::InternalError();
 
   if (internals == NULL) return VXMLElement();
   return VXMLElement(internals->GetParent());
 }
 
 
 VXMLNode::VXMLNodeType VXMLNode::GetType() const
 {
   if (internals == NULL) return VXMLNode::Type_VXMLNode;
   return internals->GetType();
 }
 
 //#############################################################################
 
 const vxistring & VXMLContent::GetValue() const
 {
   if (internals == NULL) throw VXMLDocumentModel::InternalError();
   const VXMLContentRef * ref = static_cast<const VXMLContentRef *>(internals);
   return ref->data;
 }
 
 //#############################################################################
 
 VXMLElement::VXMLElement(const VXMLNodeRef * ref) : VXMLNode(ref)
 {
 }
 
 
 VXMLElement::VXMLElement(const VXMLElement & x)
 {
   internals = x.internals;
 }
 
 
 bool VXMLElement::hasChildren() const
 {
   if (internals == NULL) throw VXMLDocumentModel::InternalError();
   const VXMLElementRef * ref = static_cast<const VXMLElementRef *>(internals);
   return !ref->children.empty();
 }
 
 
 VXMLElementType VXMLElement::GetName() const
 {
   if (internals == NULL) throw VXMLDocumentModel::InternalError();
   const VXMLElementRef * ref = static_cast<const VXMLElementRef *>(internals);
   return ref->name;
 }
 
 
 bool VXMLElement::GetAttribute(VXMLAttributeType key, vxistring & attr) const
 {
   if (internals == NULL) throw VXMLDocumentModel::InternalError();
   const VXMLElementRef * ref = static_cast<const VXMLElementRef *>(internals);
   return ref->GetAttribute(key, attr);
 }
 
 //#############################################################################
 
 // This code is NOT sensitive to possible byte order differences....  This is
 // a problem if the cache is shared across machines with different endian
 // architectures.
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 static const unsigned int INT_MULTIPLIER  = sizeof(VXIulong) / sizeof(VXIbyte);
 static const unsigned int CHAR_MULTIPLIER = sizeof(VXIchar) / sizeof(VXIbyte);
 
 
 inline void WriteInt(VXIulong i, SerializerOutput & writer)
 {
   writer.Write(reinterpret_cast<const VXIbyte *>(&i), INT_MULTIPLIER);
 }
 
 
 inline void WriteBlock(const vxistring & block, SerializerOutput & writer)
 {
   vxistring::size_type size = block.size();
   WriteInt(size, writer);
   if (size != 0) {
     writer.Write(reinterpret_cast<const VXIbyte *>(block.c_str()),
                  block.size() * CHAR_MULTIPLIER);
   }
 }
 
 
 inline VXIulong ReadInt(SerializerInput & reader)
 {
   VXIbyte temp[INT_MULTIPLIER];
   if (reader.Read(temp, INT_MULTIPLIER) != INT_MULTIPLIER)
     throw VXMLDocument::SerializationError();
 
   VXIulong * ptr = reinterpret_cast<VXIulong *>(temp);
   return *ptr;
 }
 
 
 inline void ReadBlock(vxistring & block, VXIulong size,
                       SerializerInput & reader)
 {
   const VXIulong NUM_CHARS = 256;
   VXIbyte temp[NUM_CHARS * CHAR_MULTIPLIER];
 
   // Clear string.
   if (!block.empty()) block.erase();
   if (size == 0) return;
 
   do {
     const VXIulong REQUEST = (size < NUM_CHARS ? size : NUM_CHARS);
     const VXIulong MAXREAD = REQUEST * CHAR_MULTIPLIER;
 
     if (reader.Read(temp, MAXREAD) != MAXREAD)
       throw VXMLDocument::SerializationError();
 
     block += vxistring(reinterpret_cast<const VXIchar *>(temp), REQUEST);
     size -= REQUEST;
   } while (size > 0);
 }
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 void WriteElement(const VXMLElementRef * elem, SerializerOutput & writer)
 {
   WriteInt(VXMLNode::Type_VXMLElement, writer);
 
   // Write out the element name.
   WriteInt(elem->name, writer);
 
   // Write out the attributes.
   WriteInt(elem->attributes.size(), writer);
   for (VXMLElementRef::ATTRIBUTES::const_iterator i = elem->attributes.begin();
        i != elem->attributes.end(); ++i)
   {
     WriteInt((*i).key, writer);
     WriteBlock((*i).value, writer);
   }
 
   // Write out the children.
   WriteInt(elem->children.size(), writer);
   for (VXMLElementRef::CHILDREN::const_iterator j = elem->children.begin();
        j != elem->children.end(); ++j)
   {
     switch ((*j)->GetType()) {
     case VXMLNode::Type_VXMLElement:
       WriteElement(reinterpret_cast<const VXMLElementRef *>(*j), writer);
       break;
     case VXMLNode::Type_VXMLContent:
       WriteInt(VXMLNode::Type_VXMLContent, writer);
       WriteBlock(reinterpret_cast<const VXMLContentRef *>(*j)->data, writer);
       break;
     default:
       throw VXMLDocument::SerializationError();
     }
   }
 }
 
 
 void VXMLDocument::WriteDocument(SerializerOutput & writer) const
 {
   if (internals == NULL) return;
 
   const VXMLNodeRef * root = internals->GetRoot();
   if (root == NULL || root->GetType() != VXMLNode::Type_VXMLElement)
     throw VXMLDocument::SerializationError();
 
   WriteElement(static_cast<const VXMLElementRef *>(root), writer);
 }
 
 
 // ------*---------*---------*---------*---------*---------*---------*---------
 
 void LoadElement(VXMLDocumentRep & docRep, SerializerInput & reader)
 {
   int type = ReadInt(reader);
   docRep.StartElement(VXMLElementType(type));
 
   VXIulong numAttributes = ReadInt(reader);
   for (unsigned int i = 0; i < numAttributes; ++i) {
     VXIulong key  = ReadInt(reader);
     VXIulong size = ReadInt(reader);
 
     vxistring attr;
     ReadBlock(attr, size, reader);
 
     docRep.AddAttribute(VXMLAttributeType(key), attr);
   }
 
   VXIulong numChildren = ReadInt(reader);
   for (unsigned int j = 0; j < numChildren; ++j) {
     VXIulong nodeType = ReadInt(reader);
 
     if (nodeType == VXMLNode::Type_VXMLContent) {
       VXIulong size = ReadInt(reader);
       vxistring data;
       ReadBlock(data, size, reader);
       docRep.AddContent(data.c_str(), data.size());
     }
     else if (nodeType == VXMLNode::Type_VXMLElement)
       LoadElement(docRep, reader);
     else {
       throw VXMLDocument::SerializationError();
     }
   }
 
   docRep.EndElement();
 }
 
 
 void VXMLDocument::ReadDocument(SerializerInput & reader)
 {
   VXIulong type = ReadInt(reader);
   if (type != VXMLNode::Type_VXMLElement)
     throw VXMLDocument::SerializationError();
 
   VXMLDocumentRep * docRep = new VXMLDocumentRep();
   LoadElement(*docRep, reader);
 
   if (internals != NULL)
     VXMLDocumentRep::Release(internals);
 
   internals = docRep;
 }