using regex for an xml file in linq - linq

Question

I'm trying to write a query for an Xml file.
this is my input Xml file :
<logentry
revision="10034">
<date>2009-10-07T03:45:38.000000Z</date>
<paths>
<path
kind="file"
action="M">/trunk/org.eclipse.mylyn.tasks/org.eclipse.mylyn.bugzilla.tests/src/org/eclipse/mylyn/bugzilla/tests/BugzillaRepositoryConnectorTest.java</path>
<path
kind="file"
action="M">/trunk/org.eclipse.mylyn.tasks/org.eclipse.mylyn.bugzilla.tests/src/org/eclipse/mylyn/bugzilla/tests/core/BugzillaRepositoryConnectorStandaloneTest.java</path>
</paths>
</logentry>
I'm trying to filter all the log between date 2006-05-01 and 2007-09-01. and my output it should be like this:
10034 2009-10-07 BugzillaRepositoryConnectorTest.java,BugzillaRepositoryConnectorStandaloneTest.java
it means for each specific revision number where is between date1 and date2 I want to have list of all files from tag . I used regular expression for separating the file name from the path.
this is my code:
using(System.IO.StreamWriter file1= new System.IO.StreamWriter( #"/home/datehistory"))
{XDocument log= XDocument.Load(#"/home/output.xml");
var selected= from logs in log.Descendants("logentry")
select new
{revno=logs.Attribute("revision").Value,
date=logs.Element("date").Value,
list1= {from files in logs.Element("paths").Element("path").Value
let match=Regex.Match(files,#"/([A-Za-z0-9\-]+.java)<",RegexOptions.IgnoreCase);
where match.Success
select new
{filename=match.Groups[1].Value }; }
???? "please help " where date between 2006-05-01 and 2007-09-01
};
foreach (var d in selected)
{
file1.Write(d.revno);
file1.Write("\t");
file1.Write(d.date);
file1.Write("\t");
foreach item in d.list1
{file1.write(item);
file1.write("\t"); }
file1.write("\n");
}

Answer 1

Have you considered a simpler approach? For example something like this:
var xml =
#"<logentry
revision='10034'>
<date>2009-10-07T03:45:38.000000Z</date>
<paths>
<path
kind='file'
action='M'>/trunk/org.eclipse.mylyn.tasks/org.eclipse.mylyn.bugzilla.tests/src/org/eclipse/mylyn/bugzilla/tests/BugzillaRepositoryConnectorTest.java</path>
<path
kind='file'
action='M'>/trunk/org.eclipse.mylyn.tasks/org.eclipse.mylyn.bugzilla.tests/src/org/eclipse/mylyn/bugzilla/tests/core/BugzillaRepositoryConnectorStandaloneTest.java</path>
</paths>
</logentry>";
XDocument log= XDocument.Parse(xml);
foreach (var entry in log.Descendants("logentry")) {
var date = DateTime.Parse(entry.Element("date").Value);
Console.WriteLine(date);
foreach (var path in entry.Descendants("path")) {
var idx = path.Value.LastIndexOf('/');
Console.Write(path.Value.Substring(idx + 1) + ", ");
}
Console.WriteLine();
}
}
This leaves a trailing ", " but it's just an example instead of writelines you could add the info to a struct or container and output it to a file like your original example.

Answer 2

Try this:
using System;
using System.IO;
using System.Xml.Linq;
using System.Linq;
using System.Text;
class Program
{
static void Main(string[] args)
{
var outputPath = "outputPath.log";
var xDoc = XDocument.Load("input.xml");
var sb = new StringBuilder();
xDoc.Descendants("logentry").Cast<XElement>()
.Where(e =>
{
var date = DateTime.Parse(e.Descendants("date")
.FirstOrDefault().Value);
return date >= new DateTime(2006, 5, 1) &&
date <= new DateTime(2007, 9, 1);
}).ToList().ForEach(e =>
{
var revision = e.Attribute("revision").Value;
var date = DateTime.Parse(e.Descendants("date")
.FirstOrDefault().Value).ToString("yyyy-MM-dd");
sb.Append(String.Format("{0}\t", revision));
sb.Append(String.Format("{0}\t", date));
e.Descendants("path")
.Where(p => Path.GetExtension(p.Value).ToLower() == ".java")
.ToList().ForEach(p =>
sb.Append(String.Format("{0},",
Path.GetFileName(p.Value))));
if (sb[sb.Length - 1] == ',')
sb.Length = sb.Length - 1;
sb.AppendLine();
});
File.WriteAllText(outputPath, sb.ToString());
}
}