net.ericaro.diezel.core.builder.DiezelCompiler Maven / Gradle / Ivy

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An Embedded Domain Specific Language Parser Generator PLugin compiler

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package net.ericaro.diezel.core.builder;

import java.io.File;
import java.io.IOException;

import net.ericaro.diezel.core.InconsistentTypePathException;
import net.ericaro.diezel.core.parser.ParseException;

import org.stringtemplate.v4.ST;
import org.stringtemplate.v4.STGroup;
import org.stringtemplate.v4.STGroupFile;

public class DiezelCompiler {

	private static STGroup templates = new STGroupFile("net/ericaro/diezel/core/builder/Diezel.stg");
	
	
	public static  void generate( M lang, File targetDirectory) throws ParseException, IOException, InconsistentTypePathException{
		if (lang instanceof DiezelLanguage) 
			generate((DiezelLanguage) lang, targetDirectory);
		if (lang instanceof DiezelImplementation) 
			generate((DiezelImplementation) lang, targetDirectory);
		
	}
	
	public static void generate(DiezelImplementation lang, File targetDirectory) throws ParseException, IOException, InconsistentTypePathException {
		toDir(targetDirectory, lang.getPackageName(), lang.getStartState().getName()+".java", compile(lang) );
	}
	

	public static void generate(DiezelLanguage lang, File targetDirectory) throws ParseException, IOException, InconsistentTypePathException {
		// parse the graph from states
		for (State state : lang.getGraph().getVertices()) 
			toDir(targetDirectory, lang.getPackageName(), state.getName() + ".java", compile(lang, state));
		toDir(targetDirectory, lang.getPackageName(), "guide-graph.dot", lang.toString());
	}
	
	static String compile(DiezelLanguage lang, State state) {

		ST compileUnit = templates.getInstanceOf("languageStateUnit");
		compileUnit.add("state", state);
		compileUnit.add("lang", lang);
		String result = compileUnit.render();
		// System.out.println("-------------------------------------------");
		// System.out.println(result);
		return result;
	}
	
	static String compile(DiezelImplementation lang) {
		
		ST compileUnit = templates.getInstanceOf("implementationUnit");
		compileUnit.add("lang", lang);
		String result = compileUnit.render();
//		System.out.println("-------------------------------------------");
//		System.out.println(result);
		return result;
	}
	
	public static void toDir(File dir, String packageName, String filename, String content) throws IOException {
		File d = packageName == null ? dir : new File(dir, packageName.replace(
				'.', '/'));
		FileUtils.printFile(new File(d, filename ), content, true);
	}
	
}