protected virtual IEnumerable<StylesheetApplication> DiscoverWork(TemplateData templateData, XPathVariable[] parameters, Stylesheet stylesheet)
{
TraceSources.TemplateSource.TraceInformation("Processing stylesheet instructions: {0}",
(object)stylesheet.Name);
CustomXsltContext xpathContext = CreateCustomXsltContext(templateData.IgnoredVersionComponent);
xpathContext.PushVariableScope(templateData.Document.Root, parameters); // 1
XElement[] inputElements =
templateData.Document.XPathSelectElements(stylesheet.SelectExpression, xpathContext).ToArray();
foreach (XElement inputElement in inputElements)
{
xpathContext.PushVariableScope(inputElement, stylesheet.Variables); // 2
string saveAs = ResultToString(inputElement.XPathEvaluate(stylesheet.OutputExpression, xpathContext));
string version = ResultToString(inputElement.XPathEvaluate(stylesheet.VersionExpression, xpathContext));
string assetId = ResultToString(inputElement.XPathEvaluate(stylesheet.AssetIdExpression, xpathContext));
List<AssetIdentifier> aliases = new List<AssetIdentifier>();
List<AssetSection> sections = new List<AssetSection>();
// eval condition, shortcut and log instead of wrapping entire loop in if
if (!EvalCondition(xpathContext, inputElement, stylesheet.ConditionExpression))
{
TraceSources.TemplateSource.TraceVerbose("{0}, {1} => Condition not met", assetId, version);
xpathContext.PopVariableScope(); // 2
continue;
}
Uri newUri = new Uri(saveAs, UriKind.RelativeOrAbsolute);
// register url
this._fileResolver.Add(assetId, new Version(version), ref newUri);
TraceSources.TemplateSource.TraceVerbose("{0}, {1} => {2}", assetId, version, newUri.ToString());
// aliases
foreach (AliasRegistration alias in stylesheet.AssetAliases)
{
XElement[] aliasInputElements =
inputElement.XPathSelectElements(alias.SelectExpression, xpathContext).ToArray();
foreach (XElement aliasInputElement in aliasInputElements)
{
xpathContext.PushVariableScope(aliasInputElement, alias.Variables); // 3
string aliasVersion =
ResultToString(aliasInputElement.XPathEvaluate(alias.VersionExpression, xpathContext));
string aliasAssetId =
ResultToString(aliasInputElement.XPathEvaluate(alias.AssetIdExpression, xpathContext));
// eval condition
if (EvalCondition(xpathContext, aliasInputElement, alias.ConditionExpression))
{
this._fileResolver.Add(aliasAssetId, new Version(aliasVersion), newUri);
aliases.Add(AssetIdentifier.Parse(aliasAssetId));
TraceSources.TemplateSource.TraceVerbose("{0}, {1} (Alias) => {2}", aliasAssetId,
aliasVersion,
newUri.ToString());
}
else
{
TraceSources.TemplateSource.TraceVerbose("{0}, {1} (Alias) => Condition not met",
assetId,
version);
}
xpathContext.PopVariableScope(); // 3
}
}
// sections
foreach (SectionRegistration section in stylesheet.Sections)
{
XElement[] sectionInputElements = inputElement.XPathSelectElements(section.SelectExpression, xpathContext).ToArray();
foreach (XElement sectionInputElement in sectionInputElements)
{
xpathContext.PushVariableScope(sectionInputElement, section.Variables); // 4
string sectionName =
ResultToString(sectionInputElement.XPathEvaluate(section.NameExpression, xpathContext));
string sectionVersion =
ResultToString(sectionInputElement.XPathEvaluate(section.VersionExpression, xpathContext));
string sectionAssetId =
ResultToString(sectionInputElement.XPathEvaluate(section.AssetIdExpression, xpathContext));
// eval condition
if (EvalCondition(xpathContext, sectionInputElement, section.ConditionExpression))
{
Uri sectionUri = new Uri(newUri + "#" + sectionName, UriKind.Relative);
this._fileResolver.Add(sectionAssetId, new Version(sectionVersion), sectionUri);
TraceSources.TemplateSource.TraceVerbose("{0}, {1}, (Section: {2}) => {3}",
sectionAssetId,
sectionVersion,
sectionName,
sectionUri.ToString());
sections.Add(new AssetSection(AssetIdentifier.Parse(sectionAssetId), sectionName, sectionUri));
}
else
{
TraceSources.TemplateSource.TraceVerbose("{0}, {1}, (Section: {2}) => Condition not met",
sectionAssetId,
sectionVersion,
sectionName);
}
xpathContext.PopVariableScope(); // 4
}
}
var xsltParams = ResolveXsltParams(stylesheet.XsltParams, inputElement, xpathContext).ToArray();
xpathContext.PopVariableScope(); // 2
yield return new StylesheetApplication
{
StylesheetName = stylesheet.Name,
Asset = new AssetIdentifier(assetId, new Version(version)),
Aliases = aliases, /* list of AssetIdentifiers */
Sections = sections, /* list of AssetSection */
SaveAs = newUri.ToString(),
Transform = stylesheet.Transform,
InputElement = inputElement,
XsltParams = xsltParams
};
}
xpathContext.PopVariableScope(); // 1
}
private IEnumerable<UnitOfWork> DiscoverWork(TemplateData templateData, XPathVariable[] parameters, Resource[] resources)
{
CustomXsltContext xpathContext = CreateCustomXsltContext(templateData.IgnoredVersionComponent);
xpathContext.PushVariableScope(templateData.Document.Root, parameters);
for (int i = 0; i < resources.Length; i++)
{
xpathContext.PushVariableScope(templateData.Document.Root, resources[i].Variables);
if (EvalCondition(xpathContext, templateData.Document.Root, resources[i].ConditionExpression))
{
string expandedSource = EvalValue(xpathContext, templateData.Document.Root, resources[i].Source);
string expandedOutput = EvalValue(xpathContext, templateData.Document.Root, resources[i].Output);
List<IResourceTransform> transforms = new List<IResourceTransform>();
foreach (var resourceTransform in resources[i].Transforms)
{
using (CompositionContainer localContainer = new CompositionContainer(this._container.Catalog))
{
string dirName = Path.GetDirectoryName(expandedSource);
CompositionBatch batch = new CompositionBatch();
var exportMetadata = new Dictionary<string, object>();
exportMetadata.Add(CompositionConstants.ExportTypeIdentityMetadataName,
AttributedModelServices.GetTypeIdentity(typeof(IFileProvider)));
exportMetadata.Add(CompositionConstants.PartCreationPolicyMetadataName,
CreationPolicy.Shared);
batch.AddExport(new Export(ContractNames.ResourceFileProvider,
exportMetadata,
() => new ScopedFileProvider(resources[i].FileProvider, dirName)));
// TODO export resourceTransform.Parameters into localContainer using CompositionBatch
localContainer.Compose(batch);
var requiredMetadata = new[]
{
new Tuple<string, object, IEqualityComparer>("Name",
resourceTransform.Name,
StringComparer.OrdinalIgnoreCase)
};
ImportDefinition importDefinition =
new MetadataContractBasedImportDefinition(
typeof(IResourceTransform),
null,
requiredMetadata,
ImportCardinality.ExactlyOne,
false,
true,
CreationPolicy.NonShared);
Export transformExport = localContainer.GetExports(importDefinition).Single();
transforms.Add((IResourceTransform)transformExport.Value);
}
}
yield return
new ResourceDeployment(resources[i].FileProvider,
expandedSource,
expandedOutput, // TODO this needs a 'writable' file provider
transforms.ToArray());
}
xpathContext.PopVariableScope();
}
xpathContext.PopVariableScope();
}
private IEnumerable<UnitOfWork> DiscoverWork(TemplateData templateData, XPathVariable[] parameters, Resource[] resources)
{
CustomXsltContext xpathContext = CreateCustomXsltContext(templateData.IgnoredVersionComponent);
xpathContext.PushVariableScope(templateData.Document.Root, parameters);
for (int i = 0; i < resources.Length; i++)
{
xpathContext.PushVariableScope(templateData.Document.Root, resources[i].Variables);
if (EvalCondition(xpathContext, templateData.Document.Root, resources[i].ConditionExpression))
{
List<IResourceTransform> transforms = new List<IResourceTransform>();
foreach (var resourceTransform in resources[i].Transforms)
{
CompositionContainer paramContainer = new CompositionContainer(this._container);
// TODO export resourceTransform.Parameters into paramContainer
ImportDefinition importDefinition =
new MetadataContractBasedImportDefinition(
typeof(IResourceTransform),
null,
new[] {new Tuple<string, object, IEqualityComparer>("Name", resourceTransform.Name, StringComparer.OrdinalIgnoreCase) },
ImportCardinality.ExactlyOne,
false,
false,
CreationPolicy.NonShared);
Export transformExport = paramContainer.GetExports(importDefinition).Single();
transforms.Add((IResourceTransform)transformExport.Value);
}
yield return
new ResourceDeployment(resources[i].FileProvider,
resources[i].Source,
resources[i].Output, // TODO this needs a 'writable' file provider
transforms.ToArray());
}
xpathContext.PopVariableScope();
}
xpathContext.PopVariableScope();
}
