/// <summary>
/// Check if the values match and outputs a set of granular differences
/// </summary>
/// <param name="diffObject"></param>
/// <param name="diffsForSelf"></param>
/// <param name="diffsForArgument"></param>
/// <returns></returns>
public bool ValueMatches(IDiffObject diffObject,
out IDiffObjectsCollection diffsForSelf,
out IDiffObjectsCollection diffsForArgument,
out IDiffObjectsCollection commonElements)
{
HeaderDiffObject otherObject = diffObject as HeaderDiffObject;
diffsForSelf = null;
diffsForArgument = null;
commonElements = null;
bool matches = false;
if (otherObject != null)
{
matches = _headerLineHash == otherObject.HeaderLineHash;
//if the values are different but the headers are the same
if (!matches && String.Compare(_name, otherObject.Name, true) == 0)
{
WordsDiffer valuesDiffer = new WordsDiffer();
valuesDiffer.AddTask(_values);
valuesDiffer.AddTask(otherObject.Values);
valuesDiffer.Properties.Sorted = true;
valuesDiffer.Properties.CaseInSensitiveSort = true;
double diffRatio = valuesDiffer.DoDiff(0, 1);
diffsForSelf = valuesDiffer.GetResultingDifferences(0);
diffsForArgument = valuesDiffer.GetResultingDifferences(1);
commonElements = valuesDiffer.GetResultingCommonElements(0);
matches = diffRatio >= _valuesMinSimilarity;
}
}
return(matches);
}
/// <summary>
/// Verifies if the headers are exactly equal
/// </summary>
/// <param name="diffObject"></param>
/// <returns></returns>
public bool ValueEquals(IDiffObject diffObject)
{
bool res = false;
HeaderDiffObject otherObject = diffObject as HeaderDiffObject;
if (otherObject != null)
{
res = _headerLineHash == otherObject.HeaderLineHash;
}
return(res);
}
/// <summary>
/// Compares the values
/// </summary>
/// <param name="diffObject"></param>
/// <param name="ignoreCase"></param>
/// <returns></returns>
public CompareResult CompareValues(IDiffObject diffObject, bool ignoreCase)
{
HeaderDiffObject other = diffObject as HeaderDiffObject;
CompareResult res = CompareResult.Greater;
if (other != null)
{
string otherString = other.ToString();
res = (CompareResult)String.Compare(_headerLine, otherString);
}
return(res);
}
/// <summary>
/// Adds a new header to the current collection
/// </summary>
/// <param name="obj"></param>
/// <param name="i"></param>
/// <param name="pos"></param>
/// <param name="val"></param>
private void AddNewItem(string obj, int i, long pos, string val)
{
if (!IsWhiteSpace(val))
{
HeaderDiffObject newHeader = new HeaderDiffObject((int)pos, val);
//check if the header appears more than once, this should change the similarity
//algorithm, if the header only appears once then headers with the same name
//will be considered matches
string hName = newHeader.Name + ":";
if ( //search ahead
obj.IndexOf("\n" + hName, i + 1, StringComparison.CurrentCultureIgnoreCase) == -1 &&
//search behind
obj.IndexOf(hName, 0, i - val.Length, StringComparison.CurrentCultureIgnoreCase) == -1
)
{
newHeader.ValuesMinSimilarity = 0.0; //values don't matter
}
_items.Add(newHeader);
}
}
/// <summary>
/// Returns a deep clone of the current element
/// </summary>
/// <returns></returns>
public IDiffObject Clone()
{
HeaderDiffObject clone = new HeaderDiffObject(_position, _headerLine);
return(clone);
}