public NVelocityHelper(string key, object value)
{
//1.创建Velocity 引擎（VelocityEngine）并设置属性
velocityEngine = new VelocityEngine();
velocityEngine.AddProperty(RuntimeConstants.RESOURCE_LOADER, "file"); // Velocity加载类型
velocityEngine.AddProperty(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, // Velocity加载文件路径
HttpContext.Current.Server.MapPath("~/Templates/"));
velocityEngine.AddProperty(RuntimeConstants.INPUT_ENCODING, "utf-8"); // 输入编码格式设置
velocityEngine.AddProperty(RuntimeConstants.OUTPUT_ENCODING, "utf-8"); // 输出编码格式设置
velocityEngine.Init();
//2.Velocity 上下文对象设置
vc = new VelocityContext();
vc.Put(key, value);
}
/// <summary>
/// Render nVelocity template to HTML
/// </summary>
/// <param name="output">Output text writer</param>
public override void Render(TextWriter output)
{
// .Replace(',', ';') нужен за внутренними надобнастями NVelocity
// Внутри библиотеки символы меняются обратно.
// Проблема связана с форматом представления массивов векторов и строк.
String loader_class_name = typeof(CustomResourceLoader).AssemblyQualifiedName.Replace(',', ';');
VelocityEngine velocity = new VelocityEngine();
velocity.AddProperty(RuntimeConstants.RESOURCE_LOADER, "webcore");
velocity.AddProperty("webcore.resource.loader.class", loader_class_name);
velocity.AddProperty("webcore.resource.loader.domain", DomainName);
velocity.Init();
Template tpl = velocity.GetTemplate(ViewName);
tpl.Merge(this.items, output);
}
// public virtual ExtendedProperties GetContextProperties() {
// return contextProperties;
// }
//
// public virtual bool UseClasspath {
// set {
// this.useClasspath = value;
// }
// }
/// <summary>
/// Execute the input script with Velocity
/// @throws BuildException
/// BuildExceptions are thrown when required attributes are missing.
/// Exceptions thrown by Velocity are rethrown as BuildExceptions.
/// </summary>
protected override void ExecuteTask()
{
// Make sure the template path is set.
if (templatePath == null && useClasspath == false)
{
throw new BuildException("The template path needs to be defined if you are not using " + "the classpath for locating templates!");
}
// Make sure the control template is set.
if (controlTemplate == null)
{
throw new BuildException("The control template needs to be defined!");
}
// Make sure the output directory is set.
if (outputDirectory == null)
{
throw new BuildException("The output directory needs to be defined!");
}
// Make sure there is an output file.
if (outputFile == null)
{
throw new BuildException("The output file needs to be defined!");
}
VelocityEngine ve = new VelocityEngine();
try {
// Setup the Velocity Runtime.
if (templatePath != null)
{
//log("Using templatePath: " + templatePath, project.MSG_VERBOSE);
Log.WriteLine(LogPrefix + "Using templatePath: " + templatePath);
ve.SetProperty(RuntimeConstants_Fields.FILE_RESOURCE_LOADER_PATH, templatePath);
}
if (useClasspath)
{
Log.WriteLine(LogPrefix + "Using classpath");
ve.AddProperty(RuntimeConstants_Fields.RESOURCE_LOADER, "classpath");
ve.SetProperty("classpath." + RuntimeConstants_Fields.RESOURCE_LOADER + ".class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
ve.SetProperty("classpath." + RuntimeConstants_Fields.RESOURCE_LOADER + ".cache", "false");
ve.SetProperty("classpath." + RuntimeConstants_Fields.RESOURCE_LOADER + ".modificationCheckInterval", "2");
}
ve.Init();
// Create the text generator.
Generator generator = Generator.Instance;
generator.LogPrefix = LogPrefix;
generator.VelocityEngine = ve;
generator.OutputPath = outputDirectory;
generator.InputEncoding = inputEncoding;
generator.OutputEncoding = outputEncoding;
if (templatePath != null)
{
generator.TemplatePath = templatePath;
}
// Make sure the output directory exists, if it doesn't
// then create it.
System.IO.FileInfo file = new System.IO.FileInfo(outputDirectory);
bool tmpBool;
if (System.IO.File.Exists(file.FullName))
{
tmpBool = true;
}
else
{
tmpBool = System.IO.Directory.Exists(file.FullName);
}
if (!tmpBool)
{
System.IO.Directory.CreateDirectory(file.FullName);
}
System.String path = outputDirectory + System.IO.Path.DirectorySeparatorChar.ToString() + outputFile;
Log.WriteLine(LogPrefix + "Generating to file " + path);
System.IO.StreamWriter writer = generator.getWriter(path, outputEncoding);
// The generator and the output path should
// be placed in the init context here and
// not in the generator class itself.
IContext c = initControlContext();
// Everything in the generator class should be
// pulled out and placed in here. What the generator
// class does can probably be added to the Velocity
// class and the generator class can probably
// be removed all together.
populateInitialContext(c);
// Feed all the options into the initial
// control context so they are available
// in the control/worker templates.
if (contextProperties != null)
{
IEnumerator i = contextProperties.Keys;
while (i.MoveNext())
{
System.String property = (System.String)i.Current;
System.String value_Renamed = contextProperties.GetString(property);
// Now lets quickly check to see if what
// we have is numeric and try to put it
// into the context as an Integer.
try {
c.Put(property, System.Int32.Parse(value_Renamed));
} catch (System.FormatException nfe) {
// Now we will try to place the value into
// the context as a boolean value if it
// maps to a valid boolean value.
System.String booleanString = contextProperties.TestBoolean(value_Renamed);
if (booleanString != null)
{
c.Put(property, booleanString.ToUpper().Equals("TRUE"));
}
else
{
// We are going to do something special
// for properties that have a "file.contents"
// suffix: for these properties will pull
// in the contents of the file and make
// them available in the context. So for
// a line like the following in a properties file:
//
// license.file.contents = license.txt
//
// We will pull in the contents of license.txt
// and make it available in the context as
// $license. This should make texen a little
// more flexible.
if (property.EndsWith("file.contents"))
{
// We need to turn the license file from relative to
// absolute, and let Ant help :)
//value_Renamed = StringUtils.fileContentsToString(project.resolveFile(value_Renamed).CanonicalPath);
value_Renamed = StringUtils.fileContentsToString(new FileInfo(value_Renamed).FullName);
property = property.Substring(0, (property.IndexOf("file.contents") - 1) - (0));
}
c.Put(property, value_Renamed);
}
}
}
}
writer.Write(generator.parse(controlTemplate, c));
writer.Flush();
writer.Close();
generator.shutdown();
cleanup();
} catch (BuildException e) {
throw e;
} catch (MethodInvocationException e) {
throw new BuildException("Exception thrown by '" + e.ReferenceName + "." + e.MethodName + "'" + ERR_MSG_FRAGMENT, e.WrappedThrowable);
} catch (ParseErrorException e) {
throw new BuildException("Velocity syntax error" + ERR_MSG_FRAGMENT, e);
} catch (ResourceNotFoundException e) {
throw new BuildException("Resource not found" + ERR_MSG_FRAGMENT, e);
} catch (System.Exception e) {
throw new BuildException("Generation failed" + ERR_MSG_FRAGMENT, e);
}
}
