How to use

DataEnumLoader

in

org.drools.ide.common.server.util

private void populateDateEnums(List<String> dataEnums) {
  for ( String enumFile : dataEnums ) {
    DataEnumLoader enumLoader = new DataEnumLoader( enumFile );
    if ( enumLoader.hasErrors() ) {
      errors.addAll( enumLoader.getErrors() );
    } else {
      builder.addAllDataEnumsList( enumLoader.getData() );
    }
  }
}

/**
 * This is the source of the asset, which is an MVEL map (minus the outer "[") of course.
 */
public DataEnumLoader(String mvelSource) {
  errors = new ArrayList<String>();
  this.data = loadEnum(mvelSource);
}

@Test
public void testNoOp() {
  DataEnumLoader loader = new DataEnumLoader(" ");
  assertFalse(loader.hasErrors());
  assertEquals(0, loader.getData().size());
  loader = new DataEnumLoader("");
  assertFalse(loader.hasErrors());
  assertEquals(0, loader.getData().size());
}

  mvelSource = mvelSource.substring(1);
} else {
  mvelSource = "[ " + addCommasForNewLines(mvelSource) + " ]";
  mvelData = MVEL.eval(mvelSource, new HashMap<String, Object>());
} catch (RuntimeException e) {
  addError("Unable to load enumeration data.");
  addError(e.getMessage());
  addError("Error type: " + e.getClass().getName());
  return Collections.emptyMap();
  addError("The expression is not a map, it is a " + mvelData.getClass().getName());
  return Collections.emptyMap();
  if (!(list instanceof List<?> || list instanceof String)) {
    if (list == null) {
      addError("The item with " + key + " is null.");
    } else {
      addError("The item with " + key + " is not a list or a string, it is a " + list.getClass().getName());

@Test
public void testNewLines() {
  String s = "yeah yeah, \nyeah \nyeah";
  assertEquals("yeah yeah,\nyeah,\nyeah", DataEnumLoader.addCommasForNewLines( s ));
}

@Test
public void testLiteralHelperUtilityClass() {
  //this shows how you can load it up with a class (which should return a map of keys to List.
  DataEnumLoader loader = new DataEnumLoader("=(new org.drools.ide.common.modeldriven.SampleDataSource2()).loadData()");
  assertFalse(loader.hasErrors());
  assertEquals(1, loader.getData().size());
  String[] res = (String[]) loader.getData().get("whee");
  assertEquals(2, res.length);
  assertEquals("hey", res[0]);
  assertEquals("ho", res[1]);
}

  mvelSource = mvelSource.substring(1);
} else {
  mvelSource = "[ " + addCommasForNewLines(mvelSource) + " ]";
  mvelData = MVEL.eval(mvelSource, new HashMap<String, Object>());
} catch (RuntimeException e) {
  addError("Unable to load enumeration data.");
  addError(e.getMessage());
  addError("Error type: " + e.getClass().getName());
  return Collections.emptyMap();
  addError("The expression is not a map, it is a " + mvelData.getClass().getName());
  return Collections.emptyMap();
  if (!(list instanceof List<?> || list instanceof String)) {
    if (list == null) {
      addError("The item with " + key + " is null.");
    } else {
      addError("The item with " + key + " is not a list or a string, it is a " + list.getClass().getName());

private void populateDateEnums(List<String> dataEnums) {
  for ( String enumFile : dataEnums ) {
    DataEnumLoader enumLoader = new DataEnumLoader( enumFile );
    if ( enumLoader.hasErrors() ) {
      errors.addAll( enumLoader.getErrors() );
    } else {
      builder.addAllDataEnumsList( enumLoader.getData() );
    }
  }
}

@Test
public void testLazyString() {
  //in this case we are dealing with an expression which will not be resolved at load time.
  DataEnumLoader loader = new DataEnumLoader("'Person.type[sex]' : 'something @{sex}'");
  assertFalse(loader.hasErrors());
  Map data = loader.getData();
  String[] sl = (String[]) data.get("Person.type[sex]");
  String s = sl[0];
  assertEquals("something @{sex}", s);
  Map context = new HashMap() {{ put("sex", "cool"); }};
  Object r = TemplateRuntime.eval(s, context);
  assertEquals("something cool", r);
  loader = new DataEnumLoader("'Person.type[sex, money]' : '@{sex} @{money}'");
  assertFalse(loader.hasErrors());
  sl = (String[]) loader.getData().get("Person.type[sex, money]");
  s = sl[0];
  assertEquals("@{sex} @{money}", s);
}

/**
 * This is the source of the asset, which is an MVEL map (minus the outer "[") of course.
 */
public DataEnumLoader(String mvelSource) {
  errors = new ArrayList<String>();
  this.data = loadEnum(mvelSource);
}

@Test
@Ignore
public void testEnumGeneration() throws Exception {
  Object result = MVEL.eval("[2, 3, 4, ]", new HashMap());
  assertTrue(result instanceof List);
  List l = (List) result;
  assertEquals(3, l.size());
  result = MVEL.eval("['Person.age' : [2, 3]\n, 'Person.name' : ['qqq', \n'ccc']]", new HashMap());
  DataEnumLoader loader = new DataEnumLoader(readLines().toString());
  assertFalse(loader.getErrors().toString(), loader.hasErrors());
  Map enumeration = (Map) loader.getData();
  assertEquals(loader.getErrors().toString(), 0, loader.getErrors().size());
  assertEquals(3, enumeration.size());
  String[] list = (String[]) enumeration.get("Person.age");
  assertEquals(4, list.length);
  assertEquals("1", list[0]);
  assertEquals("2", list[1]);
  list = (String[]) enumeration.get("Person.rating");
  assertEquals(2, list.length);
  assertEquals("High", list[0]);
  assertEquals("Low", list[1]);
  loader = new DataEnumLoader("goober poo error");
  assertEquals(0, loader.getData().size());
  assertFalse(loader.getErrors().size() == 0);
  assertTrue(loader.hasErrors());
}