/// <summary>
/// Creates a new <see cref="Formatter"/> using the specified
/// <paramref name="tokenizer"/> and <paramref name="textAligner"/>.
/// </summary>
/// <param name="tokenizer">
/// The tokenizer that will be used to extract the formatting tokens
/// from the format string.
/// </param>
/// <param name="textFormatter">
/// The formatter that will be used to format the entity or property values
/// before aligning and replacing the formatting tokens into the output string.
/// </param>
/// <param name="textAligner">
/// A class able to align the formatted values before replacing
/// the formatting tokens into the output string.
/// </param>
/// <param name="constantSet">
/// The default constant set.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// <i>tokenizer</i> or <i>textAligner</i> is a null reference (<b>Nothing</b> in Visual Basic).
/// </exception>
public Formatter( ITokenizer tokenizer, ITextFormatter textFormatter, ITextAligner textAligner, IConstantSet constantSet )
{
if ( tokenizer == null )
throw new ArgumentNullException( "tokenizer" );
if ( textFormatter == null )
throw new ArgumentNullException( "textFormatter" );
if ( textAligner == null )
throw new ArgumentNullException( "textAligner" );
if ( constantSet == null )
throw new ArgumentNullException( "constantSet" );
this.tokenizer = tokenizer;
this.textFormatter = textFormatter;
this.textAligner = textAligner;
this.constantSet = constantSet;
this.Reset();
}
/// <summary>
/// Generates the <see cref="FormatParameters"/> related to the specified
/// array of <see cref="System.Object"/>s.
/// </summary>
/// <param name="args">The object that will be formatted.</param>
/// <param name="constantSet"></param>
/// <returns>
/// The <see cref="FormatParameters"/> related to the specified array of <see cref="System.Object"/>s.
/// </returns>
public FormatParameters GetFormatParameters( object[] args, IConstantSet constantSet )
{
if ( args == null )
throw new ArgumentNullException( "args" );
var positionString = match.Groups["position"].Value;
positionString = string.IsNullOrEmpty( positionString ) ? "0" : positionString;
int position;
if ( !int.TryParse( positionString, out position ) )
throw new FormatException( "Invalid position: " + positionString );
if ( position < 0 || position >= args.Length )
throw new FormatException( "Invalid position: " + positionString + " should be between 0 and " + (args.Length - 1) );
var alignmentString = match.Groups["alignment"].Value;
alignmentString = string.IsNullOrEmpty( alignmentString ) ? "0" : alignmentString;
int alignment;
if ( !int.TryParse( alignmentString, out alignment ) )
throw new FormatException( "Invalid alignment: " + alignmentString );
var propertyName = match.Groups["property"].Value;
var propertyPath = (propertyName.StartsWith( "." ) ? propertyName.Substring( 1 ) : propertyName).Split( '.' );
if ( propertyPath.Length == 1 && string.IsNullOrEmpty( propertyPath[0] ) ) propertyPath = new string[0];
if ( propertyPath.Length > 1 && propertyPath.Any( property => string.IsNullOrEmpty( property ) ) )
throw new FormatException( "Invalid property: double dot in property path." );
var format = match.Groups["format"].Value;
object constantValue = null;
var constantGroup = match.Groups["constant"];
if ( constantGroup.Success )
{
var constantName = constantGroup.Value;
constantValue = constantSet.GetValue( constantName );
}
return new FormatParameters( position, propertyPath, alignment, format, constantValue );
}
