// ExpressionNode : '#{' Identifier ('[' Index ']')? '}'
private ExpressionNode ParseExpressionNode(ref int index)
{
// the previous string node either ended because it reached the end or because the start
// of an expression was encoutered, so we can safely consume two characters
index += 2;
if (index >= _configuration.Length)
{
return(null);
}
ExpressionNode result = ParseIdentifier(ref index);
if (_configuration[index] == '[')
{
index++;
result = new IndexAccessorNode((IdentifierNode)result, ParseIndex(ref index));
ParseChar(']', ref index);
}
ParseChar('}', ref index);
return(result);
}
private IDependencyResolverPolicy DoGetResolverPolicy(IndexAccessorNode node)
{
var identifier = node.Children[0] as IdentifierNode;
var index = node.Children[1] as StringNode;
if (identifier == null || index == null)
{
throw new InvalidOperationException("Index accessor node should have an identifier and an index.");
}
if (identifier.Identifier == "stepExecutionContext")
{
return(new StepContextDependencyResolverPolicy <T>(index.Literal));
}
if (identifier.Identifier == "jobExecutionContext")
{
return(new JobContextDependencyResolverPolicy <T>(index.Literal));
}
if (identifier.Identifier == "settings")
{
return(new SettingsDependencyResolverPolicy <T>(index.Literal));
}
throw new InvalidOperationException(string.Format("Unsupported identifier at {0}: {1}.", node.Position.Start,
identifier.Identifier));
}
// ExpressionNode : '#{' Identifier ('[' Index ']')? '}'
private ExpressionNode ParseExpressionNode(ref int index)
{
// the previous string node either ended because it reached the end or because the start
// of an expression was encoutered, so we can safely consume two characters
index += 2;
if (index >= _configuration.Length)
{
return null;
}
ExpressionNode result = ParseIdentifier(ref index);
if (_configuration[index] == '[')
{
index++;
result = new IndexAccessorNode((IdentifierNode)result, ParseIndex(ref index));
ParseChar(']', ref index);
}
ParseChar('}', ref index);
return result;
}
