How to use

JavaCCompiler

in

com.oracle.truffle.dsl.processor.java.compiler

private static CharSequence getContent(Object treeAndTopLevel) throws Exception {
  /*
   * CharSequence content = treeAndTopLevel.snd.getSourceFile().getCharContent(true);
   */
  return (CharSequence) method(method(field(treeAndTopLevel, "snd"), "getSourceFile"), "getCharContent", getCharContentSignature, true);
}

public static Compiler getCompiler(Element currentElement) {
  if (JavaCCompiler.isValidElement(currentElement)) {
    if (javac == null) {
      javac = new JavaCCompiler();
    }
    return javac;
  } else if (JDTCompiler.isValidElement(currentElement)) {
    if (jdt == null) {
      jdt = new JDTCompiler();
    }
    return jdt;
  } else {
    throw new UnsupportedOperationException("Unsupported compiler for element " + currentElement.getClass().getName() + ".");
  }
}

@Override
public String getMethodBody(ProcessingEnvironment env, ExecutableElement method) {
  try {
    /*
     * if (false) { Pair<JCTree, JCCompilationUnit> treeAndTopLevel = ((JavacElements)
     * env.getElementUtils()).getTreeAndTopLevel(method, null, null); JCBlock block =
     * ((JCMethodDecl) treeAndTopLevel.fst).getBody(); int startPos = block.pos; int endPos
     * = block.endpos; String methodBody =
     * treeAndTopLevel.snd.getSourceFile().getCharContent(true).subSequence(startPos + 1,
     * endPos).toString(); return methodBody; }
     */
    Object treeAndTopLevel = getTreeAndTopLevel(env, method);
    Object block = method(field(treeAndTopLevel, "fst"), "getBody");
    int startPos = (int) field(block, "pos");
    int endPos = (int) field(block, "endpos");
    return getContent(treeAndTopLevel).subSequence(startPos + 1, endPos).toString();
  } catch (Exception e) {
    return ElementUtils.printException(e);
  }
}

@Override
public String getHeaderComment(ProcessingEnvironment env, Element type) {
  try {
    String content = getContent(getTreeAndTopLevel(env, type)).toString();
    return parseHeader(content);
  } catch (Exception e) {
    return ElementUtils.printException(e);
  }
}

private static Object getTreeAndTopLevel(ProcessingEnvironment env, Element element) throws Exception {
  /*
   * Pair<JCTree, JCCompilationUnit> treeAndTopLevel = ((JavacElements)
   * env.getElementUtils()).getTreeAndTopLevel(method, null, null);
   */
  return method(method(env, "getElementUtils"), "getTreeAndTopLevel", getTreeAndTopLevelSignature, element, null, null);
}

public static Compiler getCompiler(Element currentElement) {
  if (JavaCCompiler.isValidElement(currentElement)) {
    if (javac == null) {
      javac = new JavaCCompiler();
    }
    return javac;
  } else if (JDTCompiler.isValidElement(currentElement)) {
    if (jdt == null) {
      jdt = new JDTCompiler();
    }
    return jdt;
  } else {
    throw new UnsupportedOperationException("Unsupported compiler for element " + currentElement.getClass().getName() + ".");
  }
}