Java 类org.apache.velocity.runtime.directive.Directive 实例源码

/**
     * instantiates and loads the directive with some basic checks
     * 
     * @param directiveClass
     *            classname of directive to load
     */
    private void loadDirective(String directiveClass, String caption)
    {
        try
        {
            Object o = Class.forName(directiveClass).newInstance();
            if (o instanceof Directive)
            {
                Directive directive = (Directive) o;
                fDirectives.put(directive.getName(), directive);
            } else
            {

//                error(caption + " Directive " + directiveClass + " is not org.apache.velocity.runtime.directive.Directive." + " Ignoring. ");
            }
        }
        catch (Exception e)
        {
//            error("Exception Loading " + caption + " Directive: " + directiveClass + " : " + e);
        }
    }

public CodeGenerator(CodeGeneratorContext context, M model, Writer writer, URL templateUrl, String templateResource, Set<Class<? extends Directive>> directives) {
    this.context = context != null ? context : new CodeGeneratorContext();
    this.model = model;
    this.writer = writer;
    this.templateResource = templateResource;
    this.templateUrl = templateUrl;
    this.directives = directives;

    StringResourceRepository repo = StringResourceLoader.getRepository();
    try {
        repo.putStringResource(TEMPLATE, templateUrl != null ? loadResource(templateUrl) : loadResource(templateResource));
    } catch (Exception e) {
        throw new RuntimeException(TEMPLATE_READER_FAILURE, e);
    }

    for (Class<? extends Directive> directive : directives) {
        context.getVelocityEngine().loadDirective(directive.getCanonicalName());
    }

    this.template = this.context.getVelocityEngine().getTemplate(TEMPLATE);
    this.context.getVelocityContext().put(MODEL, model);
}

/**
 * Initialise Velocity
 * 
 * @param templatePath the path to templates
 */
public static final void initialise(String templatePath)
{
    // Setup Velocity
    Properties velocityProperties = new Properties();

    // create a list of custom directives we're using
    List<Class<? extends Directive>> userDirectiveClasses = new ArrayList<Class<? extends Directive>>();
    userDirectiveClasses.add(Decorate.class);

    // build the user directive string
    StringBuilder userDirectiveStr = new StringBuilder();
    for (Class<? extends Directive> clz : userDirectiveClasses)
    {
        if (userDirectiveStr.length() > 0)
        {
            userDirectiveStr.append(",");
        }
        userDirectiveStr.append(clz.getName());
    }

    // wire in our custom directives
    velocityProperties.setProperty("userdirective", userDirectiveStr.toString());

    velocityProperties.setProperty("velocimacro.library", "");

    // wire in our custom resource loader
    velocityProperties.setProperty("resource.loader", "relativecp");
    velocityProperties.setProperty("relativecp.resource.loader.description", "Relative CP Loader");
    velocityProperties.setProperty("relativecp.resource.loader.class", RelativeClasspathResourceLoader.class.getName());
    velocityProperties.setProperty(RelativeClasspathResourceLoader.RELATIVE_PATH, templatePath);

    // initialise
    Velocity.init(velocityProperties);
}

/**
 * Initialise Velocity
 * 
 * @param templatePath the path to templates
 */
public static final void initialise(String templatePath)
{
    // Setup Velocity
    Properties velocityProperties = new Properties();

    // create a list of custom directives we're using
    List<Class<? extends Directive>> userDirectiveClasses = new ArrayList<Class<? extends Directive>>();
    userDirectiveClasses.add(Decorate.class);

    // build the user directive string
    StringBuilder userDirectiveStr = new StringBuilder();
    for (Class<? extends Directive> clz : userDirectiveClasses)
    {
        if (userDirectiveStr.length() > 0)
        {
            userDirectiveStr.append(",");
        }
        userDirectiveStr.append(clz.getName());
    }

    // wire in our custom directives
    velocityProperties.setProperty("userdirective", userDirectiveStr.toString());
    velocityProperties.setProperty("velocimacro.library", "");

    // file resource loader
    velocityProperties.setProperty("resource.loader", "file");
    velocityProperties.setProperty("file.resource.loader.path", templatePath);
    Velocity.init(velocityProperties);

    // initialise
    Velocity.init(velocityProperties);
}

public CodeGenerator(M model, Writer writer, URL templateUrl, String templateResource, Set<Class<? extends Directive>> directives) {
    this(new CodeGeneratorContext(), model, writer, templateUrl, templateResource, directives);
}

public Set<Class<? extends Directive>> getDirectives() {
    return directives;
}