/// <summary>
/// Performs validation on the xml source as well as evaluates conditional and flow expresions
/// </summary>
/// <exception cref="ArgumentException">For invalid use of conditional expressions or for invalid XML syntax. If a XmlValidatingReader is passed, then will also throw exceptions for non-schema-conforming xml</exception>
/// <param name="reader"></param>
/// <returns>the output xml </returns>
public string Process(XmlReader reader)
{
if(reader == null)
{
throw new ArgumentException("Invalid XML reader to pre-process");
}
IfContext context = new IfContext(true, true, IfState.None);
StringWriter xmlText = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(xmlText);
writer.Formatting = Formatting.Indented;
while(reader.Read())
{
if(reader.NodeType == XmlNodeType.ProcessingInstruction)
{
bool ignore = false;
switch(reader.LocalName)
{
case "if":
m_IfStack.Push(context);
context = new IfContext(context.Keep & context.Active, ParseExpression(reader.Value), IfState.If);
ignore = true;
break;
case "elseif":
if(m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
else if(context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
context.State = IfState.ElseIf;
if(!context.EverKept)
{
context.Keep = ParseExpression(reader.Value);
}
else
{
context.Keep = false;
}
ignore = true;
break;
case "else":
if(m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
else if(context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
context.State = IfState.Else;
context.Keep = !context.EverKept;
ignore = true;
break;
case "endif":
if(m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'endif' outside of 'if'");
}
context = (IfContext)m_IfStack.Pop();
ignore = true;
break;
}
if(ignore)
{
continue;
}
}//end pre-proc instruction
if(!context.Active || !context.Keep)
{
continue;
}
switch(reader.NodeType)
{
case XmlNodeType.Element:
bool empty = reader.IsEmptyElement;
writer.WriteStartElement(reader.Name);
while (reader.MoveToNextAttribute())
{
writer.WriteAttributeString(reader.Name, reader.Value);
}
if(empty)
{
writer.WriteEndElement();
}
break;
case XmlNodeType.EndElement:
writer.WriteEndElement();
break;
case XmlNodeType.Text:
writer.WriteString(reader.Value);
break;
case XmlNodeType.CDATA:
writer.WriteCData(reader.Value);
break;
default:
break;
}
}
if(m_IfStack.Count != 0)
{
throw new WarningException("Mismatched 'if', 'endif' pair");
}
return xmlText.ToString();
}
/// <summary>
/// Performs validation on the xml source as well as evaluates conditional and flow expresions
/// </summary>
/// <exception cref="ArgumentException">For invalid use of conditional expressions or for invalid XML syntax. If a XmlValidatingReader is passed, then will also throw exceptions for non-schema-conforming xml</exception>
/// <param name="initialReader"></param>
/// <returns>the output xml </returns>
public string Process(XmlReader initialReader)
{
if (initialReader == null)
{
throw new ArgumentException("Invalid XML reader to pre-process");
}
IfContext context = new IfContext(true, true, IfState.None);
StringWriter xmlText = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(xmlText);
writer.Formatting = Formatting.Indented;
// Create a queue of XML readers and add the initial
// reader to it. Then we process until we run out of
// readers which lets the <?include?> operation add more
// readers to generate a multi-file parser and not require
// XML fragments that a recursive version would use.
Stack <XmlReader> readerStack = new Stack <XmlReader>();
readerStack.Push(initialReader);
while (readerStack.Count > 0)
{
// Pop off the next reader.
XmlReader reader = readerStack.Pop();
// Process through this XML reader until it is
// completed (or it is replaced by the include
// operation).
while (reader.Read())
{
// The prebuild file has a series of processing
// instructions which allow for specific
// inclusions based on operating system or to
// include additional files.
if (reader.NodeType == XmlNodeType.ProcessingInstruction)
{
bool ignore = false;
switch (reader.LocalName)
{
case "include":
// use regular expressions to parse out the attributes.
MatchCollection matches = includeFileRegex.Matches(reader.Value);
// make sure there is only one file attribute.
if (matches.Count > 1)
{
throw new WarningException("An <?include ?> node was found, but it specified more than one file.");
}
if (matches.Count == 0)
{
throw new WarningException("An <?include ?> node was found, but it did not specify the file attribute.");
}
// ***** Adding for wildcard handling
// Push current reader back onto the stack.
readerStack.Push(reader);
// Pull the file out from the regex and make sure it is a valid file before using it.
string filename = matches[0].Groups[1].Value;
filename = String.Join(Path.DirectorySeparatorChar.ToString(), filename.Split(new char[] { '/', '\\' }));
if (!filename.Contains("*"))
{
FileInfo includeFile = new FileInfo(filename);
if (!includeFile.Exists)
{
throw new WarningException("Cannot include file: " + includeFile.FullName);
}
// Create a new reader object for this file. Then put the old reader back on the stack and start
// processing using this new XML reader.
XmlReader newReader = new XmlTextReader(includeFile.Open(FileMode.Open, FileAccess.Read, FileShare.Read));
reader = newReader;
readerStack.Push(reader);
}
else
{
WildCardInclude(readerStack, filename);
}
reader = (XmlReader)readerStack.Pop();
ignore = true;
break;
case "if":
m_IfStack.Push(context);
context = new IfContext(context.Keep & context.Active, ParseExpression(reader.Value), IfState.If);
ignore = true;
break;
case "elseif":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
if (context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
context.State = IfState.ElseIf;
if (!context.EverKept)
{
context.Keep = ParseExpression(reader.Value);
}
else
{
context.Keep = false;
}
ignore = true;
break;
case "else":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
if (context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
context.State = IfState.Else;
context.Keep = !context.EverKept;
ignore = true;
break;
case "endif":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'endif' outside of 'if'");
}
context = m_IfStack.Pop();
ignore = true;
break;
}
if (ignore)
{
continue;
}
} //end pre-proc instruction
if (!context.Active || !context.Keep)
{
continue;
}
switch (reader.NodeType)
{
case XmlNodeType.Element:
bool empty = reader.IsEmptyElement;
writer.WriteStartElement(reader.Name);
while (reader.MoveToNextAttribute())
{
writer.WriteAttributeString(reader.Name, reader.Value);
}
if (empty)
{
writer.WriteEndElement();
}
break;
case XmlNodeType.EndElement:
writer.WriteEndElement();
break;
case XmlNodeType.Text:
writer.WriteString(reader.Value);
break;
case XmlNodeType.CDATA:
writer.WriteCData(reader.Value);
break;
default:
break;
}
}
if (m_IfStack.Count != 0)
{
throw new WarningException("Mismatched 'if', 'endif' pair");
}
}
return(xmlText.ToString());
}
/// <summary>
/// Performs validation on the xml source as well as evaluates conditional and flow expresions
/// </summary>
/// <exception cref="ArgumentException">For invalid use of conditional expressions or for invalid XML syntax. If a XmlValidatingReader is passed, then will also throw exceptions for non-schema-conforming xml</exception>
/// <param name="initialReader"></param>
/// <returns>the output xml </returns>
public string Process(XmlReader initialReader)
{
if(initialReader == null)
{
throw new ArgumentException("Invalid XML reader to pre-process");
}
IfContext context = new IfContext(true, true, IfState.None);
StringWriter xmlText = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(xmlText);
writer.Formatting = Formatting.Indented;
// Create a queue of XML readers and add the initial
// reader to it. Then we process until we run out of
// readers which lets the <?include?> operation add more
// readers to generate a multi-file parser and not require
// XML fragments that a recursive version would use.
Stack<XmlReader> readerStack = new Stack<XmlReader>();
readerStack.Push(initialReader);
while(readerStack.Count > 0)
{
// Pop off the next reader.
XmlReader reader = readerStack.Pop();
// Process through this XML reader until it is
// completed (or it is replaced by the include
// operation).
while(reader.Read())
{
// The prebuild file has a series of processing
// instructions which allow for specific
// inclusions based on operating system or to
// include additional files.
if(reader.NodeType == XmlNodeType.ProcessingInstruction)
{
bool ignore = false;
switch(reader.LocalName)
{
case "include":
// use regular expressions to parse out the attributes.
MatchCollection matches = includeFileRegex.Matches(reader.Value);
// make sure there is only one file attribute.
if(matches.Count > 1)
{
throw new WarningException("An <?include ?> node was found, but it specified more than one file.");
}
if(matches.Count == 0)
{
throw new WarningException("An <?include ?> node was found, but it did not specify the file attribute.");
}
// ***** Adding for wildcard handling
// Push current reader back onto the stack.
readerStack.Push (reader);
// Pull the file out from the regex and make sure it is a valid file before using it.
string filename = matches[0].Groups[1].Value;
filename = String.Join (Path.DirectorySeparatorChar.ToString (), filename.Split (new char[] { '/', '\\' }));
if (!filename.Contains ("*")) {
FileInfo includeFile = new FileInfo (filename);
if (!includeFile.Exists) {
throw new WarningException ("Cannot include file: " + includeFile.FullName);
}
// Create a new reader object for this file. Then put the old reader back on the stack and start
// processing using this new XML reader.
XmlReader newReader = new XmlTextReader (includeFile.Open (FileMode.Open, FileAccess.Read, FileShare.Read));
reader = newReader;
readerStack.Push (reader);
} else {
WildCardInclude (readerStack, filename);
}
reader = (XmlReader)readerStack.Pop ();
ignore = true;
break;
case "if":
m_IfStack.Push(context);
context = new IfContext(context.Keep & context.Active, ParseExpression(reader.Value), IfState.If);
ignore = true;
break;
case "elseif":
if(m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
if(context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
context.State = IfState.ElseIf;
if(!context.EverKept)
{
context.Keep = ParseExpression(reader.Value);
}
else
{
context.Keep = false;
}
ignore = true;
break;
case "else":
if(m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
if(context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
context.State = IfState.Else;
context.Keep = !context.EverKept;
ignore = true;
break;
case "endif":
if(m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'endif' outside of 'if'");
}
context = m_IfStack.Pop();
ignore = true;
break;
}
if(ignore)
{
continue;
}
}//end pre-proc instruction
if(!context.Active || !context.Keep)
{
continue;
}
switch(reader.NodeType)
{
case XmlNodeType.Element:
bool empty = reader.IsEmptyElement;
writer.WriteStartElement(reader.Name);
while (reader.MoveToNextAttribute())
{
writer.WriteAttributeString(reader.Name, reader.Value);
}
if(empty)
{
writer.WriteEndElement();
}
break;
case XmlNodeType.EndElement:
writer.WriteEndElement();
break;
case XmlNodeType.Text:
writer.WriteString(reader.Value);
break;
case XmlNodeType.CDATA:
writer.WriteCData(reader.Value);
break;
default:
break;
}
}
if(m_IfStack.Count != 0)
{
throw new WarningException("Mismatched 'if', 'endif' pair");
}
}
return xmlText.ToString();
}
/// <summary>
/// Performs validation on the xml source as well as evaluates conditional and flow expresions
/// </summary>
/// <exception cref="ArgumentException">For invalid use of conditional expressions or for invalid XML syntax. If a XmlValidatingReader is passed, then will also throw exceptions for non-schema-conforming xml</exception>
/// <param name="reader"></param>
/// <returns>the output xml </returns>
public string Process(XmlReader reader)
{
if (reader == null)
{
throw new ArgumentException("Invalid XML reader to pre-process");
}
IfContext context = new IfContext(true, true, IfState.None);
StringWriter xmlText = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(xmlText);
writer.Formatting = Formatting.Indented;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.ProcessingInstruction)
{
bool ignore = false;
switch (reader.LocalName)
{
case "if":
m_IfStack.Push(context);
context = new IfContext(context.Keep & context.Active, ParseExpression(reader.Value), IfState.If);
ignore = true;
break;
case "elseif":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
else if (context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
context.State = IfState.ElseIf;
if (!context.EverKept)
{
context.Keep = ParseExpression(reader.Value);
}
else
{
context.Keep = false;
}
ignore = true;
break;
case "else":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
else if (context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
context.State = IfState.Else;
context.Keep = !context.EverKept;
ignore = true;
break;
case "endif":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'endif' outside of 'if'");
}
context = (IfContext)m_IfStack.Pop();
ignore = true;
break;
}
if (ignore)
{
continue;
}
} //end pre-proc instruction
if (!context.Active || !context.Keep)
{
continue;
}
switch (reader.NodeType)
{
case XmlNodeType.Element:
bool empty = reader.IsEmptyElement;
writer.WriteStartElement(reader.Name);
while (reader.MoveToNextAttribute())
{
writer.WriteAttributeString(reader.Name, reader.Value);
}
if (empty)
{
writer.WriteEndElement();
}
break;
case XmlNodeType.EndElement:
writer.WriteEndElement();
break;
case XmlNodeType.Text:
writer.WriteString(reader.Value);
break;
case XmlNodeType.CDATA:
writer.WriteCData(reader.Value);
break;
default:
break;
}
}
if (m_IfStack.Count != 0)
{
throw new WarningException("Mismatched 'if', 'endif' pair");
}
return(xmlText.ToString());
}
/// <summary>
/// Performs validation on the xml source as well as evaluates conditional and flow expresions
/// </summary>
/// <exception cref="ArgumentException">For invalid use of conditional expressions or for invalid XML syntax. If a XmlValidatingReader is passed, then will also throw exceptions for non-schema-conforming xml</exception>
/// <param name="reader"></param>
/// <returns>the output xml </returns>
public string Process(XmlReader inputReader)
{
if (inputReader == null)
{
throw new ArgumentException("Invalid XML reader to pre-process");
}
Stack xmlReaderStack = new Stack();
IfContext context = new IfContext(true, true, IfState.None);
StringWriter xmlText = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(xmlText);
writer.Formatting = Formatting.Indented;
XmlReader reader;
xmlReaderStack.Push(inputReader);
while (xmlReaderStack.Count > 0)
{
reader = (XmlReader)xmlReaderStack.Pop();
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.ProcessingInstruction)
{
bool ignore = false;
switch (reader.LocalName)
{
case "include":
string filename = null;
// use regular expressions to parse out the attributes.
Regex regex = new Regex(@"file=""(.*)""");
MatchCollection matches = regex.Matches(reader.Value);
// make sure there is only one file attribute.
if (matches.Count > 1)
{
throw new WarningException("An <?include ?> node was found, but it specified more than one file.");
}
else if (matches.Count == 0)
{
throw new WarningException("An <?include ?> node was found, but it did not specify the file attribute.");
}
// pull out the group inside the parentheses in the regex.
// this will be the actual filename specified
filename = matches[0].Groups[1].Value;
XmlReader newReader = new XmlTextReader(
File.Open(filename, FileMode.Open));
xmlReaderStack.Push(reader);
reader = newReader;
ignore = true;
break;
case "if":
m_IfStack.Push(context);
context = new IfContext(context.Keep & context.Active, ParseExpression(reader.Value), IfState.If);
ignore = true;
break;
case "elseif":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
else if (context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'elseif' outside of 'if'");
}
context.State = IfState.ElseIf;
if (!context.EverKept)
{
context.Keep = ParseExpression(reader.Value);
}
else
{
context.Keep = false;
}
ignore = true;
break;
case "else":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
else if (context.State != IfState.If && context.State != IfState.ElseIf)
{
throw new WarningException("Unexpected 'else' outside of 'if'");
}
context.State = IfState.Else;
context.Keep = !context.EverKept;
ignore = true;
break;
case "endif":
if (m_IfStack.Count == 0)
{
throw new WarningException("Unexpected 'endif' outside of 'if'");
}
context = (IfContext)m_IfStack.Pop();
ignore = true;
break;
}
if (ignore)
{
continue;
}
} //end pre-proc instruction
if (!context.Active || !context.Keep)
{
continue;
}
switch (reader.NodeType)
{
case XmlNodeType.Element:
bool empty = reader.IsEmptyElement;
writer.WriteStartElement(reader.Name);
while (reader.MoveToNextAttribute())
{
writer.WriteAttributeString(reader.Name, reader.Value);
}
if (empty)
{
writer.WriteEndElement();
}
break;
case XmlNodeType.EndElement:
writer.WriteEndElement();
break;
case XmlNodeType.Text:
writer.WriteString(reader.Value);
break;
case XmlNodeType.CDATA:
writer.WriteCData(reader.Value);
break;
default:
break;
}
}
}
if (m_IfStack.Count != 0)
{
throw new WarningException("Mismatched 'if', 'endif' pair");
}
return(xmlText.ToString());
}