// Deserialize properties part.
private void ParseCorePropertyPart(PackagePart part)
{
Stream stream = part.GetStream(FileMode.Open, FileAccess.Read);
// Create a reader that uses _nameTable so as to use the set of tag literals
// in effect as a set of atomic identifiers.
XmlTextReader reader = new XmlTextReader(stream, _nameTable);
//Prohibit DTD from the markup as per the OPC spec
reader.ProhibitDtd = true;
//This method expects the reader to be in ReadState.Initial.
//It will make the first read call.
PackagingUtilities.PerformInitailReadAndVerifyEncoding(reader);
//Note: After the previous method call the reader should be at the first tag in the markup.
//MoveToContent - Skips over the following - ProcessingInstruction, DocumentType, Comment, Whitespace, or SignificantWhitespace
//If the reader is currently at a content node then this function call is a no-op
if (reader.MoveToContent() != XmlNodeType.Element ||
(object)reader.NamespaceURI != PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.PackageCorePropertiesNamespace) ||
(object)reader.LocalName != PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.CoreProperties))
{
throw new XmlException(SR.Get(SRID.CorePropertiesElementExpected),
null, reader.LineNumber, reader.LinePosition);
}
// The schema is closed and defines no attributes on the root element.
if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) != 0)
{
throw new XmlException(SR.Get(SRID.PropertyWrongNumbOfAttribsDefinedOn, reader.Name),
null, reader.LineNumber, reader.LinePosition);
}
// Iterate through property elements until EOF. Note the proper closing of all
// open tags is checked by the reader itself.
// This loop deals only with depth-1 start tags. Handling of element content
// is delegated to dedicated functions.
int attributesCount;
while (reader.Read() && reader.MoveToContent() != XmlNodeType.None)
{
// Ignore end-tags. We check element errors on opening tags.
if (reader.NodeType == XmlNodeType.EndElement)
{
continue;
}
// Any content markup that is not an element here is unexpected.
if (reader.NodeType != XmlNodeType.Element)
{
throw new XmlException(SR.Get(SRID.PropertyStartTagExpected),
null, reader.LineNumber, reader.LinePosition);
}
// Any element below the root should open at level 1 exclusively.
if (reader.Depth != 1)
{
throw new XmlException(SR.Get(SRID.NoStructuredContentInsideProperties),
null, reader.LineNumber, reader.LinePosition);
}
attributesCount = PackagingUtilities.GetNonXmlnsAttributeCount(reader);
// Property elements can occur in any order (xsd:all).
object localName = reader.LocalName;
PackageXmlEnum xmlStringIndex = PackageXmlStringTable.GetEnumOf(localName);
String valueType = PackageXmlStringTable.GetValueType(xmlStringIndex);
if (Array.IndexOf(_validProperties, xmlStringIndex) == -1) // An unexpected element is an error.
{
throw new XmlException(
SR.Get(SRID.InvalidPropertyNameInCorePropertiesPart, reader.LocalName),
null, reader.LineNumber, reader.LinePosition);
}
// Any element not in the valid core properties namespace is unexpected.
// The following is an object comparison, not a string comparison.
if ((object)reader.NamespaceURI != PackageXmlStringTable.GetXmlStringAsObject(PackageXmlStringTable.GetXmlNamespace(xmlStringIndex)))
{
throw new XmlException(SR.Get(SRID.UnknownNamespaceInCorePropertiesPart),
null, reader.LineNumber, reader.LinePosition);
}
if (String.CompareOrdinal(valueType, "String") == 0)
{
// The schema is closed and defines no attributes on this type of element.
if (attributesCount != 0)
{
throw new XmlException(SR.Get(SRID.PropertyWrongNumbOfAttribsDefinedOn, reader.Name),
null, reader.LineNumber, reader.LinePosition);
}
RecordNewBinding(xmlStringIndex, GetStringData(reader), true /*initializing*/, reader);
}
else if (String.CompareOrdinal(valueType, "DateTime") == 0)
{
int allowedAttributeCount = (object)reader.NamespaceURI ==
PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.DublinCoreTermsNamespace)
? 1 : 0;
// The schema is closed and defines no attributes on this type of element.
if (attributesCount != allowedAttributeCount)
{
throw new XmlException(SR.Get(SRID.PropertyWrongNumbOfAttribsDefinedOn, reader.Name),
null, reader.LineNumber, reader.LinePosition);
}
if (allowedAttributeCount != 0)
{
ValidateXsiType(reader,
PackageXmlStringTable.GetXmlStringAsObject(PackageXmlEnum.DublinCoreTermsNamespace),
_w3cdtf);
}
RecordNewBinding(xmlStringIndex, GetDateData(reader), true /*initializing*/, reader);
}
else // An unexpected element is an error.
{
Invariant.Assert(false, "Unknown value type for properties");
}
}
}
/// <summary>
/// Parse PackageRelationship Stream
/// </summary>
/// <param name="part">relationship part</param>
/// <exception cref="XmlException">Thrown if XML is malformed</exception>
private void ParseRelationshipPart(PackagePart part)
{
//We can safely open the stream as FileAccess.Read, as this code
//should only be invoked if the Package has been opened in Read or ReadWrite mode.
Debug.Assert(_package.FileOpenAccess == FileAccess.Read || _package.FileOpenAccess == FileAccess.ReadWrite,
"This method should only be called when FileAccess is Read or ReadWrite");
using (Stream s = part.GetStream(FileMode.Open, FileAccess.Read))
{
// load from the relationship part associated with the given part
using (XmlTextReader baseReader = new XmlTextReader(s))
{
baseReader.WhitespaceHandling = WhitespaceHandling.None;
//Prohibit DTD from the markup as per the OPC spec
baseReader.ProhibitDtd = true;
using (XmlCompatibilityReader reader = new XmlCompatibilityReader(baseReader, RelationshipKnownNamespaces))
{
//This method expects the reader to be in ReadState.Initial.
//It will make the first read call.
PackagingUtilities.PerformInitailReadAndVerifyEncoding(baseReader);
//Note: After the previous method call the reader should be at the first tag in the markup.
//MoveToContent - Skips over the following - ProcessingInstruction, DocumentType, Comment, Whitespace, or SignificantWhitespace
//If the reader is currently at a content node then this function call is a no-op
reader.MoveToContent();
// look for our tag and namespace pair - throw if other elements are encountered
// Make sure that the current node read is an Element
if (reader.NodeType == XmlNodeType.Element &&
(reader.Depth == 0) &&
(String.CompareOrdinal(RelationshipsTagName, reader.LocalName) == 0) &&
(String.CompareOrdinal(PackagingUtilities.RelationshipNamespaceUri, reader.NamespaceURI) == 0))
{
ThrowIfXmlBaseAttributeIsPresent(reader);
//There should be a namespace Attribute present at this level.
//Also any other attribute on the <Relationships> tag is an error including xml: and xsi: attributes
if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) > 0)
{
throw new XmlException(SR.Get(SRID.RelationshipsTagHasExtraAttributes), null, reader.LineNumber, reader.LinePosition);
}
// start tag encountered for Relationships
// now parse individual Relationship tags
while (reader.Read())
{
//Skips over the following - ProcessingInstruction, DocumentType, Comment, Whitespace, or SignificantWhitespace
//If the reader is currently at a content node then this function call is a no-op
reader.MoveToContent();
//If MoveToContent() takes us to the end of the content
if (reader.NodeType == XmlNodeType.None)
{
continue;
}
if (reader.NodeType == XmlNodeType.Element &&
(reader.Depth == 1) &&
(String.CompareOrdinal(RelationshipTagName, reader.LocalName) == 0) &&
(String.CompareOrdinal(PackagingUtilities.RelationshipNamespaceUri, reader.NamespaceURI) == 0))
{
ThrowIfXmlBaseAttributeIsPresent(reader);
int expectedAttributesCount = 3;
string targetModeAttributeValue = reader.GetAttribute(TargetModeAttributeName);
if (targetModeAttributeValue != null)
{
expectedAttributesCount++;
}
//check if there are expected number of attributes.
//Also any other attribute on the <Relationship> tag is an error including xml: and xsi: attributes
if (PackagingUtilities.GetNonXmlnsAttributeCount(reader) == expectedAttributesCount)
{
ProcessRelationshipAttributes(reader);
//Skip the EndElement for Relationship
if (!reader.IsEmptyElement)
{
ProcessEndElementForRelationshipTag(reader);
}
}
else
{
throw new XmlException(SR.Get(SRID.RelationshipTagDoesntMatchSchema), null, reader.LineNumber, reader.LinePosition);
}
}
else
if (!(String.CompareOrdinal(RelationshipsTagName, reader.LocalName) == 0 && (reader.NodeType == XmlNodeType.EndElement)))
{
throw new XmlException(SR.Get(SRID.UnknownTagEncountered), null, reader.LineNumber, reader.LinePosition);
}
}
}
else
{
throw new XmlException(SR.Get(SRID.ExpectedRelationshipsElementTag), null, reader.LineNumber, reader.LinePosition);
}
}
}
}
}