public Expressions.INode Parse(IExecutionContext executionContext, string condition)
{
ArgUtil.NotNull(executionContext, nameof(executionContext));
var expressionTrace = new TraceWriter(Trace, executionContext);
var parser = new Expressions.Parser();
var namedValues = new Expressions.INamedValueInfo[]
{
new Expressions.NamedValueInfo <VariablesNode>(name: Constants.Expressions.Variables),
};
var functions = new Expressions.IFunctionInfo[]
{
new Expressions.FunctionInfo <AlwaysNode>(name: Constants.Expressions.Always, minParameters: 0, maxParameters: 0),
new Expressions.FunctionInfo <CanceledNode>(name: Constants.Expressions.Canceled, minParameters: 0, maxParameters: 0),
new Expressions.FunctionInfo <FailedNode>(name: Constants.Expressions.Failed, minParameters: 0, maxParameters: 0),
new Expressions.FunctionInfo <SucceededNode>(name: Constants.Expressions.Succeeded, minParameters: 0, maxParameters: 0),
new Expressions.FunctionInfo <SucceededOrFailedNode>(name: Constants.Expressions.SucceededOrFailed, minParameters: 0, maxParameters: 0),
};
return(parser.CreateTree(condition, expressionTrace, namedValues, functions) ?? new SucceededNode());
}
public bool Evaluate(IExecutionContext executionContext, string condition)
{
ArgUtil.NotNull(executionContext, nameof(executionContext));
// Parse the condition.
var expressionTrace = new TraceWriter(executionContext);
var parser = new DT.Parser();
var extensions = new DT.IFunctionInfo[]
{
new DT.FunctionInfo <AlwaysNode>(name: Constants.Expressions.Always, minParameters: 0, maxParameters: 0),
new DT.FunctionInfo <SucceededNode>(name: Constants.Expressions.Succeeded, minParameters: 0, maxParameters: 0),
new DT.FunctionInfo <SucceededOrFailedNode>(name: Constants.Expressions.SucceededOrFailed, minParameters: 0, maxParameters: 0),
new DT.FunctionInfo <VariablesNode>(name: Constants.Expressions.Variables, minParameters: 1, maxParameters: 1),
};
DT.INode tree = parser.CreateTree(condition, expressionTrace, extensions) ?? new SucceededNode();
// Evaluate the tree.
return(tree.EvaluateBoolean(trace: expressionTrace, state: executionContext));
}