/// <summary>
/// generate from a input string a rule by parsing and compiling and store it
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
private bool Generate(Antlr4.Runtime.ICharStream input)
{
try
{
RulezLexer aLexer = new RulezLexer(input);
// wrap a token-stream around the lexer
Antlr4.Runtime.CommonTokenStream theTokens = new Antlr4.Runtime.CommonTokenStream(aLexer);
// create the aParser
RulezParser aParser = new RulezParser(theTokens);
aParser.Trace = true;
aParser.Engine = this;
//aParser.RemoveErrorListeners();
//aParser.AddErrorListener(new ErrorListener());
RulezParser.RulezUnitContext aTree = aParser.rulezUnit();
// walk the parse tree -> get the result XPTree
XPTGenerator aGenerator = new XPTGenerator(aParser);
Antlr4.Runtime.Tree.ParseTreeWalker.Default.Walk(aGenerator, aTree);
// result -> Generate and store from the XPTree
return(Generate((IRule)aGenerator.XPTree));
}
catch (Exception ex)
{
return(false);
}
}
/// <summary>
/// Verify a source code and return the Inode
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public INode Verifiy(string source)
{
RulezParser.MessageListener aListener = new RulezParser.MessageListener();
RulezParser.RulezUnitContext aCtx = null;
try
{
RulezLexer aLexer = new RulezLexer(new Antlr4.Runtime.AntlrInputStream(source));
// wrap a token-stream around the lexer
Antlr4.Runtime.CommonTokenStream theTokens = new Antlr4.Runtime.CommonTokenStream(aLexer);
// create the aParser
RulezParser aParser = new RulezParser(theTokens);
aParser.Trace = true;
aParser.Engine = this;
aParser.AddErrorListener(aListener);
aCtx = aParser.rulezUnit();
if (aCtx != null)
{
return(aCtx.XPTreeNode);
}
return(null);
}
catch (Exception ex)
{
if (aCtx != null)
{
if (aCtx.XPTreeNode != null)
{
aCtx.XPTreeNode.Messages.Add(new Message(type: MessageType.Error, message: ex.Message));
return(aCtx.XPTreeNode);
}
}
return(null);
}
}
/// <summary>
/// constructor
/// </summary>
/// <param name="parser"></param>
public XPTGenerator(RulezParser parser, Engine engine = null)
{
_parser = parser;
if (engine == null)
{
_engine = parser.Engine;
}
else
{
_engine = engine;
}
}
/// <summary>
/// generate from a input string a rule by parsing and compiling and store it
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
private bool Generate(Antlr4.Runtime.ICharStream input)
{
try
{
RulezLexer aLexer = new RulezLexer(input);
// wrap a token-stream around the lexer
Antlr4.Runtime.CommonTokenStream theTokens = new Antlr4.Runtime.CommonTokenStream(aLexer);
// create the aParser
RulezParser aParser = new RulezParser(theTokens);
aParser.Trace = true;
aParser.Engine = this;
//aParser.RemoveErrorListeners();
//aParser.AddErrorListener(new ErrorListener());
RulezParser.RulezUnitContext aTree = aParser.rulezUnit();
// walk the parse tree -> get the result XPTree
XPTGenerator aGenerator = new XPTGenerator(aParser);
Antlr4.Runtime.Tree.ParseTreeWalker.Default.Walk(aGenerator, aTree);
// result -> Generate and store from the XPTree
return Generate((IRule) aGenerator.XPTree);
}
catch (Exception ex)
{
return false;
}
}
/// <summary>
/// Verify a source code and return the Inode
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public INode Verifiy(string source)
{
RulezParser.MessageListener aListener = new RulezParser.MessageListener();
RulezParser.RulezUnitContext aCtx = null;
try
{
RulezLexer aLexer = new RulezLexer(new Antlr4.Runtime.AntlrInputStream(source));
// wrap a token-stream around the lexer
Antlr4.Runtime.CommonTokenStream theTokens = new Antlr4.Runtime.CommonTokenStream(aLexer);
// create the aParser
RulezParser aParser = new RulezParser(theTokens);
aParser.Trace = true;
aParser.Engine = this;
aParser.AddErrorListener(aListener);
aCtx = aParser.rulezUnit();
if (aCtx != null) return aCtx.XPTreeNode;
return null;
}
catch (Exception ex)
{
if (aCtx != null)
{
if (aCtx.XPTreeNode != null)
{
aCtx.XPTreeNode.Messages.Add(new Message(type: MessageType.Error, message: ex.Message));
return aCtx.XPTreeNode;
}
}
return null;
}
}
/// <summary>
/// enter a rule rule
/// </summary>
/// <param name="context"></param>
public override void EnterSelectionRulez(RulezParser.SelectionRulezContext context)
{
if (context.XPTreeNode == null) context.XPTreeNode = new SelectionRule(engine: this.Engine);
// set the _xptree by a new SelectionRule xPTree
if (this.XPTree == null) this.XPTree = (XPTree)context.XPTreeNode;
}
private eXPressionTree.XPTree _xptree; // the output tree
#endregion Fields
#region Constructors
/// <summary>
/// constructor
/// </summary>
/// <param name="parser"></param>
public XPTGenerator(RulezParser parser, Engine engine = null)
{
_parser = parser;
if (engine == null) _engine = parser.Engine;
else { _engine = engine; }
}
/// <summary>
/// exit a rule rule
/// </summary>
/// <param name="context"></param>
public override void ExitSelectionRulez(RulezParser.SelectionRulezContext context)
{
}
/// <summary>
/// exit a parameter definition
/// </summary>
/// <param name="context"></param>
public override void ExitParameterdefinition(RulezParser.ParameterdefinitionContext context)
{
}