/// <summary>
/// Creates an xml node for the specified tag.
/// </summary>
protected XmlNode CreateTagXmlNode(TagBase tag)
{
#region Check the arguments
if (tag == null)
{
throw new ArgumentNullException();
}
#endregion
CheckXmlDocInitialized();
XmlElement myTagNode = fParsedDocument.CreateElement(cTagXmlNodeName);
XmlAttribute myTypeAttribute = fParsedDocument.CreateAttribute(cTagTypeXmlAttributeName);
myTypeAttribute.Value = tag.Type;
myTagNode.Attributes.Append(myTypeAttribute);
if (tag.Value != null)
{
XmlAttribute myValueAttribute = fParsedDocument.CreateAttribute(cValueXmlAttributeName);
myValueAttribute.Value = tag.Value;
myTagNode.Attributes.Append(myValueAttribute);
}
return(myTagNode);
}
/// <summary>
/// Checks whether there is a tag in the text at the specified position, and returns its type.
/// </summary>
protected Type IsTag(string text, int position)
{
foreach (Type myTagType in Tags)
{
MatchTagAttributeBase myMatchTagAttribute = TagBase.GetTagMatchAttribute(myTagType);
if (myMatchTagAttribute.Match(text, position))
{
return(myTagType);
}
}
return(null);
}
/// <summary>
/// Retrurns the tag instance from its type and value.
/// </summary>
protected TagBase GetTagFromType(string type, string value, bool hasContents)
{
foreach (Type myTagType in Tags)
{
string myType = TagBase.GetTagType(myTagType);
if (string.Compare(myType, type, true) == 0)
{
TagBase myTag = Activator.CreateInstance(myTagType) as TagBase;
myTag.InitializeFromData(this, value, hasContents);
return(myTag);
}
}
throw new Exception(string.Format("Tag cannot be found: {0}", type));
}
/// <summary>
/// Reads the tag at the specified position in the specified sql.
/// </summary>
/// <returns>
/// The position after the tag (at which to continue reading).
/// </returns>
protected override int InitializeCoreFromText(SqlStringParserBase parser, string sql, int position, TagBase parentTag)
{
#region Check the arguments
SqlStringParserBase.CheckTextAndPositionArguments(sql, position);
#endregion
int myResult = MatchStart(sql, position);
if (myResult < 0)
{
throw new Exception(string.Format("Cannot read the {0} tag.", Name));
}
Parser = parser;
HasContents = true;
ParentTag = parentTag;
return(myResult);
}
/// <summary>
/// Converts the specified tag xml node to text.
/// </summary>
private void TagXmlNodeToText(StringBuilder output, XmlNode node)
{
#region Check arguments
if (node == null)
{
throw new ArgumentNullException("node");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
#endregion
TagBase myTag = TagXmlNodeToTag(node);
myTag.WriteStart(output);
if (IsSkipWhiteSpace)
{
output.Append(cWhiteSpace);
}
if (node.ChildNodes.Count > 0)
{
XmlNodesToText(output, node.ChildNodes);
}
myTag.WriteEnd(output);
if (IsSkipWhiteSpace)
{
output.Append(cWhiteSpace);
}
}
/// <summary>
/// Reads the tag at the specified position in the specified sql string.
/// </summary>
/// <returns>
/// The position after the tag (at which to continue reading).
/// </returns>
protected override int InitializeCoreFromText(SqlStringParserBase parser, string sql, int position, TagBase parentTag)
{
#region Check the arguments
SqlStringParserBase.CheckTextAndPositionArguments(sql, position);
#endregion
int myLiteralStartPos = position;
position = MatchStartStatic(sql, position);
if (position < 0)
{
throw new Exception("Cannot read the StringLiteral tag.");
}
#region Read the literal value
int myResult = -1;
int myValueStartPos = position;
while (position < sql.Length)
{
myResult = MatchEnd(sql, position, myLiteralStartPos);
if (myResult >= 0)
{
if (position == myValueStartPos)
{
Value = string.Empty;
}
else
{
Value = sql.Substring(myValueStartPos, position - myValueStartPos);
}
break;
}
position++;
}
if (myResult < 0)
{
throw new Exception("Cannot read the StringLiteral tag.");
}
#endregion
Parser = parser;
HasContents = false;
return(myResult);
}
/// <summary>
/// Parses the specified block of a text.
/// </summary>
/// <returns>
/// Returns the end position of the parsed block.
/// </returns>
protected int ParseBlock(XmlNode parentNode, TagBase parentTag, string text, int position)
{
#region Check the arguments
if (parentNode == null)
{
throw new ArgumentNullException("parentNode");
}
CheckTextAndPositionArguments(text, position);
#endregion
while (position < text.Length)
{
if (IsSkipWhiteSpace)
{
SkipWhiteSpace(text, ref position);
}
if (position == text.Length)
{
break;
}
#region Read the parent tag ending
if (parentTag != null)
{
int myParentTagEndingEndPosition = parentTag.MatchEnd(text, position);
if (myParentTagEndingEndPosition >= 0)
{
position = myParentTagEndingEndPosition;
return(position);
}
}
#endregion
Type myTagType = IsTag(text, position);
if (myTagType != null)
{
#region Read a tag
#region Create the tag class instance
TagBase myTag = Activator.CreateInstance(myTagType) as TagBase;
position = myTag.InitializeFromText(this, text, position, parentTag);
#endregion
#region Create an xml node for the tag
XmlNode myTagXmlNode = CreateTagXmlNode(myTag);
parentNode.AppendChild(myTagXmlNode);
#endregion
if (myTag.HasContents)
{
position = ParseBlock(myTagXmlNode, myTag, text, position);
}
#endregion
}
else
{
#region Read text
string myText = ReadWordOrSeparator(text, ref position, !IsSkipWhiteSpace);
parentNode.AppendChild(CreateTextXmlNode(myText));
#endregion
}
}
if (parentTag != null && !parentTag.CanTerminateByStringEnd)
{
throw new Exception("Invalid format");
}
return(position);
}
/// <summary> /// Reads the tag at the specified position in the specified word and separator array. /// </summary> /// <param name="parentTag"> /// The parent tag of this tag. This argument is used to determine /// the end of the tag (it can be the end of the parent tag). /// </param> /// <returns> /// The position after the tag (at which to continue reading). /// </returns> protected abstract int InitializeCoreFromText(SqlStringParserBase parser, string text, int position, TagBase parentTag);
/// <summary>
/// Reads the tag at the specified position in the specified word and separator array.
/// </summary>
/// <param name="parentTag">
/// The parent tag of this tag. This argument is used to determine
/// the end of the tag (it can be the end of the parent tag).
/// </param>
/// <returns>
/// The position after the tag (at which to continue reading).
/// </returns>
public int InitializeFromText(SqlStringParserBase parser, string text, int position, TagBase parentTag)
{
#region Check the arguments
if (parser == null)
{
throw new ArgumentNullException("parser");
}
#endregion
int myResult = InitializeCoreFromText(parser, text, position, parentTag);
IsInitialized = true;
return(myResult);
}
/// <summary>
/// Reads the tag at the specified position in the specified word and separator array.
/// </summary>
/// <returns>
/// The position after the tag (at which to continue reading).
/// </returns>
protected override int InitializeCoreFromText(SqlStringParserBase parser, string sql, int position, TagBase parentTag)
{
#region Check the arguments
SqlStringParserBase.CheckTextAndPositionArguments(sql, position);
#endregion
int myAfterTagStartPos = MatchStartStatic(sql, position);
if (myAfterTagStartPos < 0)
{
throw new Exception("Cannot read the QuotedIdentifier tag.");
}
#region Read the identifier's value
int myTagEndPos = sql.IndexOf(cTagDelimiter, myAfterTagStartPos, StringComparison.InvariantCultureIgnoreCase);
if (myTagEndPos < 0)
{
throw new Exception("Cannot read the QuotedIdentifier tag.");
}
if (myAfterTagStartPos == myTagEndPos)
{
Value = string.Empty;
}
else
{
Value = sql.Substring(myAfterTagStartPos, myTagEndPos - myAfterTagStartPos);
}
#endregion
Parser = parser;
HasContents = false;
return(myTagEndPos + cTagDelimiter.Length);
}