http://nexus.sonatype.org/oss-repository-hosting.html/ST4: StringTemplate is a java template engine for generating source code, web pages, emails, or any other formatted text output. StringTemplate is particularly good at multi-targeted code generators, multiple site skins, and internationalization/localization. It evolved over years of effort developing jGuru.com. StringTemplate also powers the ANTLR 3 and 4 code generator. Its distinguishing characteristic is that unlike other engines, it strictly enforces model-view separation. Strict separation makes websites and code generators more flexible and maintainable; it also provides an excellent defense against malicious template authors. 
package org.stringtemplate.v4;

import org.antlr.runtime.CharStream;
import org.antlr.runtime.CommonToken;
import org.stringtemplate.v4.compiler.*;
import org.stringtemplate.v4.compiler.Compiler;
import org.stringtemplate.v4.misc.Misc;

import java.net.URL;


A directory of templates without headers like ST v3 had. Still allows group files in directory though like STGroupDir parent. 
/** A directory of templates without headers like ST v3 had.  Still allows group
 *  files in directory though like {@link STGroupDir} parent.
 */
public class STRawGroupDir extends STGroupDir {
    public STRawGroupDir(String dirName) {
        super(dirName);
    }

    public STRawGroupDir(String dirName, char delimiterStartChar, char delimiterStopChar) {
        super(dirName, delimiterStartChar, delimiterStopChar);
    }

    public STRawGroupDir(String dirName, String encoding) {
        super(dirName, encoding);
    }

    public STRawGroupDir(String dirName, String encoding, char delimiterStartChar, char delimiterStopChar) {
        super(dirName, encoding, delimiterStartChar, delimiterStopChar);
    }

    public STRawGroupDir(URL root, String encoding, char delimiterStartChar, char delimiterStopChar) {
        super(root, encoding, delimiterStartChar, delimiterStopChar);
    }

    @Override
    public CompiledST loadTemplateFile(String prefix, String unqualifiedFileName,
                                       CharStream templateStream)
    {
        String template = templateStream.substring(0, templateStream.size() - 1);
        String templateName = Misc.getFileNameNoSuffix(unqualifiedFileName);
        String fullyQualifiedTemplateName = prefix + templateName;
        CompiledST impl = new Compiler(this).compile(fullyQualifiedTemplateName, template);
        CommonToken nameT = new CommonToken(STLexer.SEMI); // Seems like a hack, best I could come up with.
        nameT.setInputStream(templateStream);
        rawDefineTemplate(fullyQualifiedTemplateName, impl, nameT);
        impl.defineImplicitlyDefinedTemplates(this);
        return impl;
    }
}