/*
* Converts an object to an XML element string.
*/
public static string ConvertToElement(string name, object objectToConvert, XMLVersion version)
{
// Return a serialized XML element if it is an XML element.
if (objectToConvert is VersionedXMLElement)
{
return(((VersionedXMLElement)objectToConvert).Serialize(version, name));
}
// Return the object as a string.
return("<" + name + ">" + ConvertToString(objectToConvert, version) + "</" + name + ">");
}
/*
* Converts a string to an object.
*/
public static object DeserializeToObject(string value, Type propertyType, XMLVersion version)
{
// Get the underlying type if it is nullable.
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
propertyType = propertyType.GetGenericArguments()[0];
}
// Return an enum if a name matches.
if (propertyType.IsEnum)
{
// Return if an attribute matches.
foreach (var enumItem in Enum.GetValues(propertyType))
{
foreach (XMLEnum attribute in propertyType.GetField(enumItem.ToString()).GetCustomAttributes(typeof(XMLEnum), false))
{
if (attribute.IsVersionValid(version) && attribute.Name == value)
{
return(enumItem);
}
}
}
// Return if a name matches.
foreach (var enumItem in Enum.GetValues(propertyType))
{
if (enumItem.ToString() == value && propertyType.GetField(enumItem.ToString()).GetCustomAttributes(typeof(XMLEnum), false).Length == 0)
{
return(enumItem);
}
}
// Throw an exception.
throw new InvalidVersionException(propertyType.Name + "." + value, version);
}
// Return a converted string.
var typeConverter = TypeDescriptor.GetConverter(propertyType);
return(typeConverter.ConvertFromString(value));
}
/*
* Serializes the element.
*/
public string Serialize(XMLVersion version)
{
// Get the name.
string name = null;
bool attributeDefined = false;
var selfType = this.GetType();
foreach (XMLElement attribute in selfType.GetCustomAttributes(typeof(XMLElement), true))
{
attributeDefined = true;
if (attribute.IsVersionValid(version))
{
if (name == null)
{
// Set the name if it is null.
name = attribute.Name;
}
else
{
// Throw an exception if overlapping names exist (could cause unexpected behavior).
throw new OverlappingVersionsException(selfType.Name, version);
}
}
}
// Throw an exception if an attribute is defined but the name isn't. This happens
// when the serializing version is invalid.
if (name == null && attributeDefined)
{
throw new InvalidVersionException(selfType.Name, version);
}
// Set the name to the object name if no attribute is present.
if (name == null)
{
name = selfType.Name;
}
// Serialize the object.
return(this.Serialize(version, name));
}
/*
* Returns if a version is valid.
*/
public bool IsVersionValid(XMLVersion otherVersion)
{
// Create the versions to compare. If they are null, the versions will be null.
var firstVersion = XMLVersion.FromString(this.FirstVersion);
var removedVersion = XMLVersion.FromString(this.RemovedVersion);
// Return if the version is valid.
if (firstVersion != null && removedVersion != null)
{
return(firstVersion <= otherVersion && removedVersion > otherVersion);
}
else if (firstVersion != null)
{
return(firstVersion <= otherVersion);
}
else if (removedVersion != null)
{
return(removedVersion > otherVersion);
}
// Return true (first and removed versions not defined).
return(true);
}
/*
* Converts an XML element to an object.
*/
public static object DeserializeToObject(XElement xmlElement, Type propertyType, XMLVersion version)
{
// Return a parsed XML element.
if (IsOfType(propertyType, typeof(VersionedXMLElement)))
{
if (xmlElement.Value != "" || xmlElement.FirstAttribute != null)
{
return(DeserializeType(xmlElement.ToString(), version, propertyType));
}
else
{
return(null);
}
}
// Return a converted string.
return(DeserializeToObject(xmlElement.Value, propertyType, version));
}
/*
* Deserializes a string to an XML element.
*/
public static T Deserialize <T>(string xmlString, XMLVersion version)
{
return((T)DeserializeType(xmlString, version, typeof(T)));
}
/*
* Deserializes an object.
*/
public static object DeserializeType(string xmlString, XMLVersion version, Type type)
{
xmlString = xmlString.Trim();
// Create the new object.
var newObject = Convert.ChangeType(Activator.CreateInstance(type, new object[] { }), type);
var selfType = newObject.GetType();
var members = selfType.GetMembers();
// Create an XML parser and get the attributes and elements.
var xmlDocument = XDocument.Parse(xmlString);
var elements = xmlDocument.Root.Elements().ToArray();
var attributes = xmlDocument.Root.Attributes().ToArray();
// Set the attributes.
foreach (var xmlAttribute in attributes)
{
// Find the attribute to add to.
MemberInfo memberToSet = null;
foreach (var member in members)
{
foreach (XMLAttribute attribute in member.GetCustomAttributes(typeof(XMLAttribute), true))
{
var property = selfType.GetProperty(member.Name);
if (property != null)
{
if (attribute.IsVersionValid(version) &&
attribute.Name.ToLower() == xmlAttribute.Name.LocalName.ToLower())
{
if (memberToSet != null)
{
// Throw an exception if the attribute overlaps.
throw new OverlappingVersionsException(member.Name, version);
}
else
{
memberToSet = member;
}
}
}
else
{
// Throw an exception if the property is null ("{ get; set; }" is missing).
throw new MissingGetterException(member.Name);
}
}
}
// If the attribute exists, set the value.
if (memberToSet != null)
{
var property = selfType.GetProperty(memberToSet.Name);
var deserializedObject = DeserializeToObject(xmlAttribute.Value, property.PropertyType, version);
property.SetValue(newObject, deserializedObject);
}
}
// Set the elements.
var unknownElements = new List <string>();
foreach (var xmlElement in elements)
{
// Find the attribute to add to.
MemberInfo memberToSet = null;
foreach (var member in members)
{
foreach (XMLElement attribute in member.GetCustomAttributes(typeof(XMLElement), true))
{
var property = selfType.GetProperty(member.Name);
if (property != null)
{
if (attribute.IsVersionValid(version) &&
attribute.Name.ToLower() == xmlElement.Name.LocalName.ToLower())
{
if (memberToSet != null)
{
// Throw an exception if the attribute overlaps.
throw new OverlappingVersionsException(member.Name, version);
}
else
{
memberToSet = member;
}
}
}
else
{
// Throw an exception if the property is null ("{ get; set; }" is missing).
throw new MissingGetterException(member.Name);
}
}
}
// If the attribute exists, set the value.
if (memberToSet != null)
{
// Set the value.
var property = selfType.GetProperty(memberToSet.Name);
var propertyType = property.PropertyType;
if (IsOfType(propertyType, typeof(IList)))
{
var deserializedObject = DeserializeToObject(xmlElement, propertyType.GetGenericArguments()[0], version);
((IList)property.GetValue(newObject)).Add(deserializedObject);
}
else
{
var deserializedObject = DeserializeToObject(xmlElement, propertyType, version);
property.SetValue(newObject, deserializedObject);
}
}
else
{
unknownElements.Add(xmlElement.ToString());
}
}
// Parse unknown elements.
var method = type.GetMethod("ParseAdditionalElements");
if (method != null)
{
method.Invoke(newObject, new object[2] {
version, unknownElements
});
}
// Return the new object.
return(newObject);
}
public InvalidVersionException(string name, XMLVersion version) : base(name + " can't be used for version " + version.MainVersion + "." + version.SubVersion + ".")
{
}
public OverlappingVersionsException(string name, XMLVersion version) : base(name + " has overlapping version information for version " + version.MainVersion + "." + version.SubVersion + ". This makes the serialization ambiguous.")
{
}
/*
* Parses elements that aren't defined by properties.
*/
public virtual void ParseAdditionalElements(XMLVersion version, List <string> elements)
{
}
/*
* Returns additional elements to add when serializing.
* This method must handle all escaping of special characters.
*/
public virtual List <string> GetAdditionalElements(XMLVersion version)
{
return(this.additionalElements);
}
/*
* Invoked before serializing the object to finalize
* setting of elements.
*/
public virtual void PreSerialize(XMLVersion version)
{
}
/*
* Converts an object to a string.
*/
public static string ConvertToString(object objectToConvert, XMLVersion version)
{
// Return an XML string if it is an XML object.
if (objectToConvert is VersionedXMLElement)
{
return(((VersionedXMLElement)objectToConvert).Serialize(version));
}
// Return an XSD time if it is a DateTime.
if (objectToConvert is DateTime)
{
// Get the components.
var dateTime = (DateTime)objectToConvert;
var year = dateTime.Year.ToString();
var month = dateTime.Month.ToString();
var day = dateTime.Day.ToString();
// Add the leading zeros.
if (dateTime.Month < 10)
{
month = "0" + month;
}
if (dateTime.Day < 10)
{
day = "0" + day;
}
// Return the formatted time.
return(year + "-" + month + "-" + day);
}
// Return a boolean as lowercase if it is a bool.
if (objectToConvert is bool)
{
return(objectToConvert.ToString().ToLower());
}
// Return an enum value if it is an enum.
if (objectToConvert.GetType().IsEnum)
{
// Get the name of the enum.
var enumType = objectToConvert.GetType();
var enumName = Enum.GetName(enumType, objectToConvert);
var attributeDefined = false;
var nameDefined = false;
foreach (XMLEnum attribute in enumType.GetField(enumName).GetCustomAttributes(typeof(XMLEnum), false))
{
attributeDefined = true;
if (attribute.IsVersionValid(version))
{
if (nameDefined == false)
{
// Set the name if it is null.
nameDefined = true;
enumName = attribute.Name;
}
else
{
// Throw an exception if overlapping names exist (could cause unexpected behavior).
throw new OverlappingVersionsException(enumType.Name + "." + Enum.GetName(enumType, objectToConvert), version);
}
}
}
// Throw an exception if the attribute is defined but not set.
if (attributeDefined && !nameDefined)
{
throw new InvalidVersionException(objectToConvert.GetType().Name + "." + enumName, version);
}
// Return the escaped enum value.
return(SecurityElement.Escape(enumName));
}
// Return the ToString result.
return(SecurityElement.Escape(objectToConvert.ToString()));
}
/*
* Serializes the element with a give name.
*/
public string Serialize(XMLVersion version, string elementName)
{
var selfType = this.GetType();
var members = selfType.GetMembers();
var xmlString = "<" + elementName;
// Pre-serialize the object.
this.PreSerialize(version);
// Add the attributes.
foreach (var member in members)
{
bool attributeAdded = false;
foreach (XMLAttribute attribute in member.GetCustomAttributes(typeof(XMLAttribute), true))
{
var property = selfType.GetProperty(member.Name);
if (property != null)
{
if (attribute.IsVersionValid(version))
{
if (attributeAdded)
{
// Throw an exception if the attribute overlaps.
throw new OverlappingVersionsException(member.Name, version);
}
else
{
// Add the attribute if it isn't null.
attributeAdded = true;
var value = property.GetValue(this, null);
if (value != null)
{
// Add the attribute.
xmlString += " " + attribute.Name + "=\"" + ConvertToString(value, version) + "\"";
}
}
}
}
else
{
// Throw an exception if the property is null ("{ get; set; }" is missing).
throw new MissingGetterException(member.Name);
}
}
}
// Add the additional attributes.
foreach (var attributeName in this.additionalAttributes.Keys)
{
xmlString += " " + attributeName + "=\"" + this.additionalAttributes[attributeName] + "\"";
}
xmlString += ">";
// Add the child elements.
foreach (var member in members)
{
bool elementAdded = false;
foreach (XMLElement attribute in member.GetCustomAttributes(typeof(XMLElement), true))
{
var property = selfType.GetProperty(member.Name);
if (property != null)
{
var value = property.GetValue(this, null);
if (value != null)
{
if (attribute.IsVersionValid(version))
{
if (elementAdded)
{
// Throw an exception if the element overlaps.
throw new OverlappingVersionsException(member.Name, version);
}
else
{
// Add the child element.
elementAdded = true;
if (value is IList)
{
foreach (var listObject in (IList)value)
{
xmlString += ConvertToElement(attribute.Name, listObject, version);
}
}
else
{
xmlString += ConvertToElement(attribute.Name, value, version);
}
}
}
}
}
else
{
// Throw an exception if the property is null ("{ get; set; }" is missing).
throw new MissingGetterException(member.Name);
}
}
}
// Add additional child elements.
var additionalElements = this.GetAdditionalElements(version);
if (additionalElements != null)
{
foreach (var additionalElement in additionalElements)
{
xmlString += additionalElement;
}
}
// Return the final string with the ending tag.
return(xmlString + "</" + elementName + ">");
}
