/// <summary>
/// Executes the task.
/// </summary>
/// <exception cref="BuildException">
/// <list type="bullet">
/// <item>
/// <description>If the <see cref="OutputFile"/> attribute is set and the <see cref="InFiles"/> element is used.</description>
/// </item>
/// <item>
/// <description>If no source files are present.</description>
/// </item>
/// <item>
/// <description>If the xslt file does not exist.</description>
/// </item>
/// <item>
/// <description>If the xslt file cannot be retrieved by the specified URI.</description>
/// </item>
/// </list>
/// </exception>
protected override void ExecuteTask() {
// ensure base directory is set, even if fileset was not initialized
// from XML
if (InFiles.BaseDirectory == null) {
InFiles.BaseDirectory = new DirectoryInfo(Project.BaseDirectory);
}
StringCollection srcFiles = null;
if (SrcFile != null) {
srcFiles = new StringCollection();
srcFiles.Add(SrcFile.FullName);
} else if (InFiles.FileNames.Count > 0) {
if (OutputFile != null) {
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1148")),
Location);
}
srcFiles = InFiles.FileNames;
}
if (srcFiles == null || srcFiles.Count == 0) {
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1147")),
Location);
}
if (XsltFile.IsFile) {
FileInfo fileInfo = new FileInfo(XsltFile.LocalPath);
if (!fileInfo.Exists) {
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1149"), fileInfo.FullName),
Location);
}
} else {
HttpWebRequest request = (HttpWebRequest) WebRequest.Create(XsltFile);
if (Proxy != null) {
request.Proxy = Proxy.GetWebProxy();
}
HttpWebResponse response = (HttpWebResponse) request.GetResponse();
if (response.StatusCode != HttpStatusCode.OK) {
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1149"), XsltFile),
Location);
}
}
foreach (string srcFile in srcFiles) {
string destFile = null;
if (OutputFile != null) {
destFile = OutputFile.FullName;
}
if (String.IsNullOrEmpty(destFile)) {
// TODO: use System.IO.Path (gs)
// append extension if necessary
string ext = Extension.IndexOf(".") > -1 ? Extension : "." + Extension;
int extPos = srcFile.LastIndexOf('.');
if (extPos == -1) {
destFile = srcFile + ext;
} else {
destFile = srcFile.Substring(0, extPos) + ext;
}
destFile = Path.GetFileName(destFile);
}
FileInfo srcInfo = new FileInfo(srcFile);
FileInfo destInfo = new FileInfo(Path.GetFullPath(Path.Combine(
DestDir.FullName, destFile)));
if (!srcInfo.Exists) {
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1150"), srcInfo.FullName),
Location);
}
bool destOutdated = !destInfo.Exists
|| srcInfo.LastWriteTime > destInfo.LastWriteTime;
if (!destOutdated && XsltFile.IsFile) {
FileInfo fileInfo = new FileInfo(XsltFile.LocalPath);
destOutdated |= fileInfo.LastWriteTime > destInfo.LastWriteTime;
}
if (destOutdated) {
XmlReader xmlReader = null;
XmlReader xslReader = null;
TextWriter writer = null;
try {
// store current directory
string originalCurrentDirectory = Directory.GetCurrentDirectory();
// initialize XPath document holding input XML
XPathDocument xml = null;
try {
// change current directory to directory containing
// XSLT file, to allow includes to be resolved
// correctly
Directory.SetCurrentDirectory(srcInfo.DirectoryName);
// load the xml that needs to be transformed
Log(Level.Verbose, "Loading XML file '{0}'.",
srcInfo.FullName);
xmlReader = CreateXmlReader(new Uri(srcInfo.FullName));
xml = new XPathDocument(xmlReader);
} finally {
// restore original current directory
Directory.SetCurrentDirectory(originalCurrentDirectory);
}
// initialize xslt parameters
XsltArgumentList xsltArgs = new XsltArgumentList();
// set the xslt parameters
foreach (XsltParameter parameter in Parameters) {
if (IfDefined && !UnlessDefined) {
xsltArgs.AddParam(parameter.ParameterName,
parameter.NamespaceUri, parameter.Value);
}
}
// create extension objects
foreach (XsltExtensionObject extensionObject in ExtensionObjects) {
if (extensionObject.IfDefined && !extensionObject.UnlessDefined) {
object extensionInstance = extensionObject.CreateInstance();
xsltArgs.AddExtensionObject(extensionObject.NamespaceUri,
extensionInstance);
}
}
try {
if (XsltFile.IsFile) {
// change current directory to directory containing
// XSLT file, to allow includes to be resolved
// correctly
FileInfo fileInfo = new FileInfo(XsltFile.LocalPath);
Directory.SetCurrentDirectory(fileInfo.DirectoryName);
}
// load the stylesheet
Log(Level.Verbose, "Loading stylesheet '{0}'.", XsltFile);
xslReader = CreateXmlReader(XsltFile);
// create writer for the destination xml
writer = CreateWriter(destInfo.FullName);
// do the actual transformation
Log(Level.Info, "Processing '{0}' to '{1}'.",
srcInfo.FullName, destInfo.FullName);
XslCompiledTransform xslt = new XslCompiledTransform();
string xslEngineName = xslt.GetType().Name;
Log(Level.Verbose, "Using {0} to load '{1}'.",
xslEngineName, XsltFile);
xslt.Load(xslReader, new XsltSettings(true, true), new XmlUrlResolver() );
Log(Level.Verbose, "Using {0} to process '{1}' to '{2}'.",
xslEngineName, srcInfo.FullName, destInfo.FullName);
xslt.Transform(xml, xsltArgs, writer);
} finally {
// restore original current directory
Directory.SetCurrentDirectory(originalCurrentDirectory);
}
} catch (Exception ex) {
throw new BuildException(string.Format(CultureInfo.InvariantCulture,
ResourceUtils.GetString("NA1151"), srcInfo.FullName, XsltFile),
Location, ex);
} finally {
// ensure file handles are closed
if (xmlReader != null) {
xmlReader.Close();
}
if (xslReader != null) {
xslReader.Close();
}
if (writer != null) {
writer.Close();
}
}
}
}
}
