CODEWITHSUNDEEP
javaeasy-rules
sdicola
sdicola

Reputation: 962

Easy-rules: set rule name in a POJO using a contructor

I have the following Rule

@Rule
@Slf4j
public class ModuleRule{

  private Content content;
  private String baseDir;


  @Condition
  public boolean when(Facts facts) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
    content = facts.get("content");
    baseDir = facts.get("base_dir");

    Method getModule = content.getClass().getMethod("get"+name);
    return (boolean) getModule.invoke(content);
  }

  @Action
  public void then(@Fact("toInclude") List<Template> selectedTemplates) throws IOException, TemplateGenUtilsException {
    log.info("Adding module:" + name);
    final String moduleTemplatesPath = String.format("%s/%s", baseDir, name);
    selectedTemplates.addAll(FileUtils.replacePath(moduleTemplatesPath, FileUtils.loadTemplates(name), content.getDOMAIN(), content.getAPP_NAME()));
  }
}

Which is instantiated in a the following way: 

 @Bean
  public Rules rules() {
    Rules rules = new Rules();

    templatesConfig.getModules().stream() .   //Modules is a list of String
        .map(ModuleRule::new)
        .forEach(rules::register);

    return rules;
  }

The code won't work as after the first registration, the other rules have the same name and therefore won't be registered. Therefore, here is my question: is there a way to create a new rule and set its name at runtime?

I have also tried to extend BasicRules, the problem here is that when the engine fires, the rule is not evaluated. Here is the code: 

@Slf4j
public class ModuleRule extends BasicRule{


  private Content content;
  private String templatesBaseDir;


  public ModuleRule(String name) {
    super(name);
  }

  @Condition
  public boolean when(Facts facts) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
    content = facts.get("content");
    templatesBaseDir = facts.get("base_dir");

    Method getModule = content.getClass().getMethod("get"+name);
    return (boolean) getModule.invoke(content);
  }

  @Action
  public void then(@Fact("toInclude") List<Template> selectedTemplates) throws IOException, TemplateGenUtilsException {
    log.info("Adding module:" + name);
    final String moduleTemplatesPath = String.format("%s/%s", templatesBaseDir, name);
    selectedTemplates.addAll(FileUtils.replacePath(moduleTemplatesPath, FileUtils.loadTemplates(name), content.getDOMAIN(), content.getAPP_NAME()));
  }

Upvotes: 0

Views: 630

Answers (1)

sdicola
sdicola

Reputation: 962

Silly error: the BasicRule extension works BUT you need to override the execute and evaluate methods and not use the annotation.

Everything works now!

Upvotes: 1

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