How to use

org.kie.dmn.feel.codegen.feel11.CompilerBytecodeLoader

constructor

/**
 * Generates a compilable class that reports a (compile-time) error at runtime
 */
public static CompiledFEELExpression compiledError(String expression, String msg) {
  return new CompilerBytecodeLoader()
      .makeFromJPExpression(
          expression,
          compiledErrorExpression(msg),
          Collections.emptySet());
}

private CompiledFEELExpression parse(String input, Map<String, Type> inputTypes) {
  FEEL_1_1Parser parser = FEELParser.parse(null, input, inputTypes, Collections.emptyMap(), Collections.emptyList(), Collections.emptyList());
  ParseTree tree = parser.compilation_unit();
  ASTBuilderVisitor v = new ASTBuilderVisitor(inputTypes);
  BaseNode node = v.visit(tree);
  DirectCompilerResult directResult = node.accept(new ASTCompilerVisitor());
  
  Expression expr = directResult.getExpression();
  CompiledFEELExpression cu = new CompilerBytecodeLoader().makeFromJPExpression(input, expr, directResult.getFieldDeclarations());
  return cu;
}

private CompiledFEELUnaryTests parse(String input, Map<String, Type> inputTypes, FEELEventListenersManager mgr, CompiledFEELSupport.SyntaxErrorListener listener) {
  FEEL_1_1Parser parser = FEELParser.parse(mgr, input, inputTypes, Collections.emptyMap(), Collections.emptyList(), Collections.emptyList());
  ParseTree tree = parser.unaryTestsRoot();
  DirectCompilerResult directResult;
  if (listener.isError()) {
    directResult = CompiledFEELSupport.compiledErrorUnaryTest(listener.event().getMessage());
  } else {
    ASTBuilderVisitor v = new ASTBuilderVisitor(inputTypes);
    BaseNode node = v.visit(tree);
    BaseNode transformed = node.accept(new ASTUnaryTestTransform()).node();
    directResult = transformed.accept(new ASTCompilerVisitor());
  }
  Expression expr = directResult.getExpression();
  CompiledFEELUnaryTests cu = new CompilerBytecodeLoader().makeFromJPUnaryTestsExpression(input, expr, directResult.getFieldDeclarations());
  return cu;
}