public static LogicalExpression Compile(string expression, bool nocache)
{
LogicalExpression logicalExpression = null;
if (_cacheEnabled && !nocache)
{
try
{
Rwl.EnterReadLock();
if (_compiledExpressions.ContainsKey(expression))
{
Debug.WriteLine("Expression retrieved from cache: " + expression);
var wr = _compiledExpressions[expression];
logicalExpression = wr.Target as LogicalExpression;
if (wr.IsAlive && logicalExpression != null)
{
return(logicalExpression);
}
}
}
finally
{
Rwl.ExitReadLock();
}
}
if (logicalExpression == null)
{
var lexer = new NCalcLexer(new ANTLRStringStream(expression));
var parser = new NCalcParser(new CommonTokenStream(lexer));
logicalExpression = parser.ncalcExpression().value;
if (parser.Errors != null && parser.Errors.Count > 0)
{
throw new EvaluationException(String.Join(Environment.NewLine, parser.Errors.ToArray()));
}
if (_cacheEnabled && !nocache)
{
try
{
Rwl.EnterWriteLock();
_compiledExpressions[expression] = new WeakReference(logicalExpression);
}
finally
{
Rwl.ExitWriteLock();
}
CleanCache();
Debug.WriteLine("Expression added to cache: " + expression);
}
}
return(logicalExpression);
}
public static LogicalExpression Compile(string expression, bool nocache)
{
LogicalExpression logicalExpression = null;
if (_cacheEnabled && !nocache)
{
try
{
Rwl.AcquireReaderLock(Timeout.Infinite);
if (_compiledExpressions.ContainsKey(expression))
{
Trace.TraceInformation("Expression retrieved from cache: " + expression);
var wr = _compiledExpressions[expression];
logicalExpression = wr.Target as LogicalExpression;
if (wr.IsAlive && logicalExpression != null)
{
logicalExpression.RetrievedFromCache = true;
return(logicalExpression);
}
}
}
finally
{
Rwl.ReleaseReaderLock();
}
}
if (logicalExpression == null)
{
var lexer = new NCalcLexer(new ANTLRStringStream(expression));
var parser = new NCalcParser(new CommonTokenStream(lexer));
logicalExpression = parser.ncalcExpression().value;
if (parser.Errors != null && parser.Errors.Count > 0)
{
throw new EvaluationException(String.Join(Environment.NewLine, parser.Errors.ToArray()));
}
if (_cacheEnabled && !nocache)
{
try
{
Rwl.AcquireWriterLock(Timeout.Infinite);
_compiledExpressions[expression] = new WeakReference(logicalExpression);
}
finally
{
Rwl.ReleaseWriterLock();
}
CleanCache();
Trace.TraceInformation("Expression added to cache: " + expression);
}
}
return(logicalExpression);
}
public static LogicalExpression Compile(string expression, bool nocache)
{
LogicalExpression logicalExpression = null;
if (_cacheEnabled && !nocache)
{
if (_compiledExpressions.ContainsKey(expression))
{
//Debug.WriteLine("Expression retrieved from cache: " + expression);
if (_compiledExpressions.TryGetValue(expression, out var wr))
{
logicalExpression = wr.Target as LogicalExpression;
if (wr.IsAlive && logicalExpression != null)
{
return(logicalExpression);
}
}
}
}
if (logicalExpression == null)
{
var lexer = new NCalcLexer(new ANTLRStringStream(expression));
var parser = new NCalcParser(new CommonTokenStream(lexer));
logicalExpression = parser.ncalcExpression().value;
if (parser.Errors != null && parser.Errors.Count > 0)
{
throw new EvaluationException(String.Join(Environment.NewLine, parser.Errors.ToArray()));
}
if (_cacheEnabled && !nocache)
{
try
{
if (_compiledExpressions.TryGetValue(expression, out var wr))
{
_compiledExpressions.TryUpdate(expression, new WeakReference(logicalExpression), wr);
}
else
{
_compiledExpressions.TryAdd(expression, new WeakReference(logicalExpression));
}
}
finally
{
CleanCache();
}
//Debug.WriteLine("Expression added to cache: " + expression);
}
}
return(logicalExpression);
}
public static LogicalExpression Compile(string expression, bool nocache)
{
LogicalExpression logicalExpression = null;
if (_cacheEnabled && !nocache)
{
try
{
Rwl.AcquireReaderLock(Timeout.Infinite);
if (_compiledExpressions.ContainsKey(expression))
{
Trace.TraceInformation("Expression retrieved from cache: " + expression);
var wr = _compiledExpressions[expression];
logicalExpression = wr.Target as LogicalExpression;
if (wr.IsAlive && logicalExpression != null)
{
return logicalExpression;
}
}
}
finally
{
Rwl.ReleaseReaderLock();
}
}
if (logicalExpression == null)
{
var lexer = new NCalcLexer(new ANTLRStringStream(expression));
var parser = new NCalcParser(new CommonTokenStream(lexer));
logicalExpression = parser.ncalcExpression().value;
if (parser.Errors != null && parser.Errors.Count > 0)
{
throw new EvaluationException(String.Join(Environment.NewLine, parser.Errors.ToArray()));
}
if (_cacheEnabled && !nocache)
{
try
{
Rwl.AcquireWriterLock(Timeout.Infinite);
_compiledExpressions[expression] = new WeakReference(logicalExpression);
}
finally
{
Rwl.ReleaseWriterLock();
}
CleanCache();
Trace.TraceInformation("Expression added to cache: " + expression);
}
}
return logicalExpression;
}
